APC SurgeArrest Professional PRO7 (4Z0842P07546) - Revision history

PowerPig at 16:45, 22 September 2026

2026-09-22T16:45:32Z

← Older revision		Revision as of 16:45, 22 September 2026
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	Unlike the underside of the enclosure, which has largely retained its original color, the upper housing exhibits substantial discoloration, suggesting that long-term environmental exposure played a major role in the aging process.		Unlike the underside of the enclosure, which has largely retained its original color, the upper housing exhibits substantial discoloration, suggesting that long-term environmental exposure played a major role in the aging process.

	The pattern of ~~discoloration~~ suggests:		The resulting discoloration pattern provides a visual record of long-term usage and environmental aging and suggests:

	* One two-prong device occupied the outlet nearest the end opposite the power-cord entry.		* One two-prong device occupied the outlet nearest the end opposite the power-cord entry.
	* Multiple grounded three-prong devices occupied the adjacent outlets.		* Multiple grounded three-prong devices occupied the adjacent outlets.
	* The outlet closest to the power-cord entry appears relatively unused.		* The outlet closest to the power-cord entry appears relatively unused.

	~~The resulting discoloration pattern provides a visual record of long-term usage and environmental aging.~~

	The PRO7 utilizes a six-foot SJT-rated power cord terminated with a right-angle grounded attachment plug.		The PRO7 utilizes a six-foot SJT-rated power cord terminated with a right-angle grounded attachment plug.

PowerPig at 16:43, 22 September 2026

2026-09-22T16:43:07Z

← Older revision		Revision as of 16:43, 22 September 2026
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	Unlike the 2017 APC PRO7 specimen documented by the OldSurge Archive, this example exhibits substantial enclosure yellowing while remaining complete and operational.		Unlike the 2017 APC PRO7 specimen documented by the OldSurge Archive, this example exhibits substantial enclosure yellowing while remaining complete and operational.

			The documented example provides an informative comparison with the later 2017 PRO7 specimen documented elsewhere in the archive, illustrating changes in enclosure aging, circuit-board revisions, and long-term service characteristics.

	== Documented Example ==		== Documented Example ==
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	== Specifications ==		== Specifications ==

	* OldSurge ID: OS-0011
	* Manufacturer: APC		* Manufacturer: APC
	* Product Family: SurgeArrest Professional		* Product Family: SurgeArrest Professional
	* Model: PRO7
	* Serial Number: 4Z0842P07546
	* Manufacturing Date: September 2008
	* Country of Origin: Philippines		* Country of Origin: Philippines
	* Device Type: Surge Protector		* Device Type: Surge Protector
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	* Weight: 1 lb 9.9 oz (734 g)		* Weight: 1 lb 9.9 oz (734 g)


			== Weight ==

			The documented example weighs approximately 1 lb 9.9 oz (734 g).

			[[File:surge_APC_Pro7_2008_4Z0842P07546_weight_01.jpg\|center\|600px\|APC SurgeArrest Professional PRO7 on a digital scale.]]

	== Physical Description ==		== Physical Description ==
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	The APC SurgeArrest Professional PRO7 utilizes a rounded upper housing and a flat outlet section containing seven grounded outlets.		The APC SurgeArrest Professional PRO7 utilizes a rounded upper housing and a flat outlet section containing seven grounded outlets.

	The documented example exhibits significant yellowing across most exposed enclosure surfaces. Areas surrounding several receptacles have retained noticeably lighter coloration where plugs appear to have remained installed for extended periods.		The documented example exhibits significant yellowing across most exposed enclosure surfaces. Areas surrounding several receptacles have retained noticeably lighter coloration where plugs appear to have remained installed for extended periods. The resulting discoloration pattern provides a visual record of long-term usage and environmental aging.

			Unlike the underside of the enclosure, which has largely retained its original color, the upper housing exhibits substantial discoloration, suggesting that long-term environmental exposure played a major role in the aging process.

	The pattern of discoloration suggests:		The pattern of discoloration suggests:
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	The resulting discoloration pattern provides a visual record of long-term usage and environmental aging.		The resulting discoloration pattern provides a visual record of long-term usage and environmental aging.

	Unlike the underside of the enclosure, which has largely retained its original color, the upper housing exhibits significant yellowing. The difference may be attributable to environmental exposure, ultraviolet light, heat, or differences in plastic formulation between the enclosure halves.

	The PRO7 utilizes a six-foot SJT-rated power cord terminated with a right-angle grounded attachment plug.		The PRO7 utilizes a six-foot SJT-rated power cord terminated with a right-angle grounded attachment plug.
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	Unlike the 2017 PRO7 documented by the archive, the Protection Working indicator on this specimen appears noticeably dimmer during operation. The Site Wiring Fault indicator remained unlit when connected to a properly wired receptacle.		Unlike the 2017 PRO7 documented by the archive, the Protection Working indicator on this specimen appears noticeably dimmer during operation. The Site Wiring Fault indicator remained unlit when connected to a properly wired receptacle.

			Comparison with the 2017 PRO7 specimen demonstrates that APC revised the suppression circuitry during the production life of the PRO7 while retaining the same overall mechanical architecture and feature set.

	<gallery mode="packed" heights="250">		<gallery mode="packed" heights="250">
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	File:surge_APC_Pro7_2008_4Z0842P07546_testing_polaritygrounding_02.jpg\|Outlet tester indicating correct wiring and grounding.		File:surge_APC_Pro7_2008_4Z0842P07546_testing_polaritygrounding_02.jpg\|Outlet tester indicating correct wiring and grounding.
	</gallery>		</gallery>

	~~== Weight ==~~

	~~The documented example weighs approximately 1 lb 9.9 oz (734 g).~~

	~~[[File:surge_APC_Pro7_2008_4Z0842P07546_weight_01.jpg\|center\|600px\|APC SurgeArrest Professional PRO7 on a digital scale.]]~~

	== Condition Upon Acquisition ==		== Condition Upon Acquisition ==
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	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_reassembly_01.jpg\|Color difference between enclosure components during reassembly.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_reassembly_01.jpg\|Color difference between enclosure components during reassembly.
	</gallery>		</gallery>

			[[Category:Surge Protectors]]

PowerPig at 16:39, 22 September 2026

2026-09-22T16:39:58Z

Show changes

PowerPig at 16:35, 22 September 2026

2026-09-22T16:35:27Z

← Older revision		Revision as of 16:35, 22 September 2026
Line 10:		Line 10:

	Unlike the 2017 APC PRO7 specimen documented by the OldSurge Archive, this example exhibits substantial enclosure yellowing while remaining complete and operational.		Unlike the 2017 APC PRO7 specimen documented by the OldSurge Archive, this example exhibits substantial enclosure yellowing while remaining complete and operational.

			== Weight ==

			The documented example weighs approximately 1 lb 9.9 oz (734 g).

			[[File:surge_APC_Pro7_2008_4Z0842P07546_weight_01.jpg\|center\|600px\|APC SurgeArrest Professional PRO7 on a digital scale.]]

	== Physical Description ==		== Physical Description ==
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	* Height:		* Height:
	** Approximately 1.75 in (4.4 cm)		** Approximately 1.75 in (4.4 cm)
	* Power Cord Length: Approximately 6 ft (1.8 m)
	* Electrical Rating: 120 VAC, 15 A, 50/60 Hz		* Electrical Rating: 120 VAC, 15 A, 50/60 Hz
	* UL 1363 Power Tap		* UL 1363 Power Tap
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	* Cord Manufacturer: Baohing		* Cord Manufacturer: Baohing
	* Plug Certification File Number: E56406		* Plug Certification File Number: E56406
			* Weight: 1 lb 9.9 oz (734 g)

	== Testing ==		== Testing ==

PowerPig: /* Teardown */

2026-09-22T16:32:37Z

Teardown

← Older revision		Revision as of 16:32, 22 September 2026
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	The overall architecture remains similar to later PRO7 examples but appears to utilize an earlier revision of APC's suppression circuitry.		The overall architecture remains similar to later PRO7 examples but appears to utilize an earlier revision of APC's suppression circuitry.

			The APC PRO7 incorporates both surge suppression and line-noise filtering.

			Visible components include:

			* Multiple MOV surge suppressors
			* EMI/RFI filtering choke
			* X2 safety capacitor
			* Protection-status indicator circuitry
			* Site-wiring-fault indicator circuitry

	<gallery mode="packed" heights="250">		<gallery mode="packed" heights="250">
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	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_busbar_circuitboard_01.jpg\|Outlet bus bars and suppression circuit board.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_busbar_circuitboard_01.jpg\|Outlet bus bars and suppression circuit board.
	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_switchandbreaker_01.jpg\|Cord-entry wiring, switch, and breaker assembly.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_switchandbreaker_01.jpg\|Cord-entry wiring, switch, and breaker assembly.
	~~File:surge_APC_Pro7_2008_4Z0842P07546_teardown_datewheels_01.jpg\|Internal date-code wheels indicating September 2008 manufacture.~~
	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboardunder_01.jpg\|Suppression circuitry and 2002 APC board marking.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboardunder_01.jpg\|Suppression circuitry and 2002 APC board marking.
	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboarddetail_01.jpg\|Underside of the suppression circuit board.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboarddetail_01.jpg\|Underside of the suppression circuit board.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_datewheels_01.jpg\|Internal date wheels indicating September 2008 manufacture.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboardunder_02.jpg\|Suppression circuitry with LEDs, MOVs, and filtering components.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_circuitboardunder_detail_01.jpg\|Close-up of surge-suppression and filtering components.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_reassembly_01.jpg\|Color difference between enclosure components during reassembly.
	</gallery>		</gallery>

PowerPig: /* Teardown */

2026-09-22T16:24:41Z

Teardown

@@ Line 152: / Line 152: @@
 Comparison with the 2017 PRO7 specimen suggests that APC retained the same overall mechanical architecture while revising portions of the circuit-board design during the product's production life.
 <gallery mode="packed" heights="250">
@@ Line 160: / Line 176: @@
 File:surge_APC_Pro7_2008_4Z0842P07546_teardown_busbar_circuitboard_01.jpg|Outlet bus bars and suppression circuit board.
 File:surge_APC_Pro7_2008_4Z0842P07546_teardown_switchandbreaker_01.jpg|Cord-entry wiring, switch, and breaker assembly.
 </gallery>
 == Documented Example ==

PowerPig at 16:19, 22 September 2026

2026-09-22T16:19:24Z

← Older revision		Revision as of 16:19, 22 September 2026
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	Inspection of the documented example revealed dust accumulation and cosmetic contamination consistent with long-term use, but no obvious signs of overheating, melted components, or catastrophic electrical failure.		Inspection of the documented example revealed dust accumulation and cosmetic contamination consistent with long-term use, but no obvious signs of overheating, melted components, or catastrophic electrical failure.

			The PRO7 utilizes a combined power-switch and circuit-breaker assembly located near the power-cord entry point.

			As observed in the 2017 PRO7 specimen documented elsewhere in the archive, the outlet bus bars become partially displaced when the enclosure halves are separated. Reassembly requires proper seating of the bus bars within their molded supports before the housing can be closed correctly.

			The stamped brass bus-bar system distributes power to all outlet-contact assemblies while the suppression circuitry and monitoring functions are concentrated on the printed circuit board.

			Comparison with the 2017 PRO7 specimen suggests that APC retained the same overall mechanical architecture while revising portions of the circuit-board design during the product's production life.

	<gallery mode="packed" heights="250">		<gallery mode="packed" heights="250">
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	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_left_01.jpg\|Upper housing outlet supports and structural details.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_left_01.jpg\|Upper housing outlet supports and structural details.
	File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_cordentry_01.jpg\|Control-section housing details.		File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_cordentry_01.jpg\|Control-section housing details.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_switchbreakerclose_01.jpg\|Circuit breaker and rocker-switch assembly.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_busbar_circuitboard_01.jpg\|Outlet bus bars and suppression circuit board.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_switchandbreaker_01.jpg\|Cord-entry wiring, switch, and breaker assembly.
	</gallery>		</gallery>
	== Documented Example ==		== Documented Example ==

PowerPig at 16:15, 22 September 2026

2026-09-22T16:15:54Z

← Older revision		Revision as of 16:15, 22 September 2026
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	</gallery>		</gallery>


			== Teardown ==

			The APC SurgeArrest Professional PRO7 is assembled using multiple screws and can be opened non-destructively.

			During disassembly, the enclosure separates into upper and lower housing halves. The upper housing contains molded outlet barriers, mounting-slot structures, reinforcing ribs, and dedicated supports for the outlet-contact assemblies and control-section components.

			The lower housing contains the outlet-contact assemblies, brass bus bars, rocker switch, power-cord wiring, and surge-suppression circuit board.

			Inspection of the documented example revealed dust accumulation and cosmetic contamination consistent with long-term use, but no obvious signs of overheating, melted components, or catastrophic electrical failure.

			<gallery mode="packed" heights="250">
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_open_01.jpg\|PRO7 opened following removal of the enclosure screws.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_left_01.jpg\|Upper housing outlet supports and structural details.
			File:surge_APC_Pro7_2008_4Z0842P07546_teardown_toppanel_cordentry_01.jpg\|Control-section housing details.
			</gallery>
	== Documented Example ==		== Documented Example ==

PowerPig at 15:42, 22 September 2026

2026-09-22T15:42:33Z

← Older revision		Revision as of 15:42, 22 September 2026
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	* Plug Certification File Number: E56406		* Plug Certification File Number: E56406

			== Testing ==

			The documented example was tested for basic electrical operation and wiring integrity.

			Testing with a receptacle tester confirmed correct hot, neutral, and ground wiring. No open ground, open neutral, reversed polarity, or other wiring faults were detected.

			The rocker switch successfully controlled power to all outlets.

			When energized, the green Protection Working indicator illuminated, indicating that surge-protection circuitry remained active.

			Unlike the 2017 PRO7 documented by the archive, the Protection Working indicator on this specimen appears noticeably dimmer during operation. The Site Wiring Fault indicator remained unlit when connected to a properly wired receptacle.

			<gallery mode="packed" heights="250">
			File:surge_APC_Pro7_2008_4Z0842P07546_testing_switchoffpluggedinnolights_01.jpg\|PRO7 connected to power with the rocker switch in the OFF position.
			File:surge_APC_Pro7_2008_4Z0842P07546_testing_dimgreenled_01.jpg\|Dim Protection Working indicator illuminated during testing.
			File:surge_APC_Pro7_2008_4Z0842P07546_testing_polaritygrounding_02.jpg\|Outlet tester indicating correct wiring and grounding.
			</gallery>

	== Documented Example ==		== Documented Example ==

PowerPig at 15:37, 22 September 2026

2026-09-22T15:37:41Z

← Older revision		Revision as of 15:37, 22 September 2026
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	When used with modern receptacles installed in the grounding-pin-up orientation, the plug directs the power cord upward before it bends downward. While the arrangement remains functional, it is somewhat less convenient than more modern low-profile plug designs that direct the cord downward immediately upon exiting the receptacle.		When used with modern receptacles installed in the grounding-pin-up orientation, the plug directs the power cord upward before it bends downward. While the arrangement remains functional, it is somewhat less convenient than more modern low-profile plug designs that direct the cord downward immediately upon exiting the receptacle.

			The PRO7 utilizes a six-foot SJT-rated power cord terminated with a right-angle grounded attachment plug.

			Cord markings identify the cable as a three-conductor 2.08 mm² (approximately 14 AWG) cord rated for 300 volts and 60°C operation.

			The power cord appears to have been manufactured by Baohing and carries both UL and CSA approval markings.

	== Product Gallery ==		== Product Gallery ==
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	* Power Cord Length: Approximately 6 ft (1.8 m)		* Power Cord Length: Approximately 6 ft (1.8 m)
	* Power Cord Type: SJT		* Power Cord Type: SJT
			* Conductors: 3 × 2.08 mm² (approximately 14 AWG)
	* Cord Voltage Rating: 300 V		* Cord Voltage Rating: 300 V
	* Cord Temperature Rating: 60°C		* Cord Temperature Rating: 60°C
	* UL File Number (Cord): E159216		* UL File Number (Cord): E159216
			* Cord Manufacturer: Baohing
	* Plug Certification File Number: E56406		* Plug Certification File Number: E56406