APC SurgeArrest Professional PRO7 (4Z0842P07546)

APC SurgeArrest Professional PRO7 (4Z0842P07546)

APC SurgeArrest Professional PRO7 (4Z0842P07546).

Overview

The APC SurgeArrest Professional PRO7 is a seven-outlet surge protector manufactured by APC.

The documented example bears serial number 4Z0842P07546 and was manufactured in September 2008.

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

• OldSurge ID: OS-0011
• Model: PRO7
• Serial Number: 4Z0842P07546
• Manufacturing Date: September 2008

Specifications

• Manufacturer: APC
• Product Family: SurgeArrest Professional
• Country of Origin: Philippines
• Device Type: Surge Protector
• Outlets: 7 grounded outlets

• Length:
  • Approximately 10.25 in (26.0 cm) along the long edge
  • Approximately 9.0 in (22.9 cm) along the curved edge

• Width:
  • Approximately 4.19 in (10.6 cm) at the base

• Height:
  • Approximately 1.75 in (4.4 cm)

• Electrical Rating: 120 VAC, 15 A, 50/60 Hz

• UL 1363 Power Tap
• UL 1449 TVSS

• TVSS Ratings:
  • Line-to-Neutral (L-N): 330 V
  • Line-to-Ground (L-G): 330 V
  • Neutral-to-Ground (N-G): 330 V

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

• Weight: 1 lb 9.9 oz (734 g)

Weight

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

APC SurgeArrest Professional PRO7 on a digital scale.

Physical Description

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 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 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.
• Multiple grounded three-prong devices occupied the adjacent outlets.
• The outlet closest to the power-cord entry appears relatively unused.

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.

The PRO7 utilizes a right-angle grounded plug intended to sit close to the wall surface. When used with receptacles installed in the grounding-pin-up orientation, the cord exits upward before bending downward, making it somewhat less convenient than many modern right-angle plug designs.

The underside incorporates two keyhole-style mounting slots that support either horizontal or vertical mounting orientations.

Product Gallery

• 
  Overall view of the documented PRO7 example.
• 
  APC branding and Protection Working indicator.
• 
  Outlet section showing differential yellowing.
• 
  Power switch and status indicators.
• 
  Left-side profile view.
• 
  Right-side profile view.
• 
  Cord-entry end showing the switch and status indicators.
• 
  Rounded outlet-end profile.
• 
  Underside view showing labels and mounting provisions.
• 
  Model and serial-number label.
• 
  Cord-entry end and mounting provisions.
• 
  Product information label and protection ratings.
• 
  Right-angle plug and attached power cord.
• 
  Right-angle attachment plug with approval markings.
• 
  Power cord specifications and UL markings.
• 
  Additional power cord manufacturer markings.
• 
  Additional power cord specifications.

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.

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.

• 
  PRO7 connected to power with the rocker switch in the OFF position.
• 
  Dim Protection Working indicator illuminated during testing.
• 
  Outlet tester indicating correct wiring and grounding.

Condition Upon Acquisition

The documented example was acquired as part of a lot containing twelve APC SurgeArrest Professional surge protectors.

The enclosure exhibits significant yellowing, accumulated dirt, and cosmetic wear consistent with long-term use and storage.

The yellowing is primarily concentrated on the upper housing. The underside of the enclosure has retained much more of its original color, suggesting that environmental exposure played a significant role in the discoloration.

The unit was cleaned prior to detailed documentation and photography.

PRO7 as acquired prior to cleaning.

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. As observed in the 2017 PRO7 specimen documented elsewhere in the archive, the outlet bus bars become partially displaced when the housing halves are separated. Proper reassembly requires reseating the bus bars within their molded supports.

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.

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.

The suppression circuit board bears a © 2002 American Power Conversion copyright marking, indicating that the underlying circuit design predates manufacture of the documented example by several years.

A molded date-code wheel visible within the enclosure appears to indicate manufacture of the housing components in September 2008, consistent with the serial-number-derived manufacturing date.

Visible suppression and filtering components include:

• Multiple metal-oxide varistors (MOVs)
• EMI/RFI filtering choke
• Film capacitor
• Protection-status indicator circuitry
• Site-wiring-fault indicator circuitry
• Combined switch and circuit-breaker assembly

The overall architecture remains similar to later PRO7 examples but appears to utilize an earlier revision of APC's suppression circuitry.

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

• 
  PRO7 opened following removal of the enclosure screws.
• 
  Upper housing outlet supports and structural details.
• 
  Control-section housing details.
• 
  Circuit breaker and rocker-switch assembly.
• 
  Outlet bus bars and suppression circuit board.
• 
  Cord-entry wiring, switch, and breaker assembly.
• 
  Suppression circuitry and 2002 APC board marking.
• 
  Underside of the suppression circuit board.
• 
  Internal date wheels indicating September 2008 manufacture.
• 
  Suppression circuitry with LEDs, MOVs, and filtering components.
• 
  Close-up of surge-suppression and filtering components.
• 
  Color difference between enclosure components during reassembly.