Schneider Electric PowerPact molded case circuit breakers (B/H/J/L/M/P/R frames)
Manufacturer: Schneider Electric
Square D PowerPact molded case breakers, the UL 489 workhorses with a recall history every used buyer must screen
This model is part of SecondWatt’s switchgear research catalogue. Specifications and price observations are included where supported by sources. Equipment availability and commercial terms require confirmation.
Schneider PowerPact dossier: B-R frame molded case breakers under UL 489, priced from 500 USD, recall and counterfeit screens, inspection checklist.
PowerPact is Square D's molded case circuit breaker family, listed under UL 489 rather than built as metal-enclosed switchgear: frames B, H, J, L, M, P and R, from 100 A H-frames to 1,200 A P-frames and the large R-frame, with thermal-magnetic and electronic trip options. A documented H-frame example (HJA36100) rates 100 A, 3-pole, 600 V AC at 25 kA (65 kA at 480 V).
Liquidity is exceptional for the category: new distributor stock at 499.99-700 USD for the common HJA36100, refurbished P-frames at 7,250 USD, and deep dealer channels (Bay Power, Relectric, Breaker Outlet) with same-day shipment on common frames.
Two screens are mandatory on used units. The 2014/2015 CPSC recall covered genuine PowerPact J-frames for fire, burn, and shock hazards, so date-code checks apply; and the 2007 counterfeit Square D recall plus Schneider's active counterfeit program (189 shadow companies cited) make serial verification through the OEM a required step on any used purchase.
Why it matters
PowerPact is the volume denominator of the LV breaker market: prices are transparent, supply is deep, and the recall/counterfeit history is documented, which makes it the family where used-buyer safety screening matters most. The 500-7,250 USD observed range across frames sets the small end of low-voltage breaker pricing.
Who buys it
Contractors and plant electricians buy PowerPact frames daily for panelboard and switchboard duty; data center fit-outs consume H/J/L frames in bulk. Used-market buyers are cost-driven and turnaround-driven, which is exactly the flow counterfeiters target, hence the screening emphasis.
Role in the data center
Branch and feeder protection in panelboards, switchboards and PDUs throughout the data hall and its support spaces, consumed in volume during fit-out and refresh cycles. H and J frames dominate the branch count while L, P and R frames sit at switchboard mains, which is why the family sets the small end of low-voltage breaker pricing.
Key specifications
| Frame lineup | B / H / J / L / M / P / R |
|---|---|
| Listing standard | UL 489 |
| HJA36100 rating | 100 A, 3P, 600 V AC |
| HJ interrupting | 25 kA @600 V; 65 kA @480 V |
| P-frame example | PJA36120: 1,200 A, 600 V |
| Observed new HJA36100 | 499.99-700 USD |
| Observed refurbished P-frame | 7,250 USD |
| J-frame recall | CPSC 2014/2015 |
| Constructions | I-Line plug-on and unit-mount |
| Rating basis | 80% and 100%-rated versions |
Technical summary
Frames: B / H / J / L / M / P / R. Standard: UL 489. H-frame example (HJA36100): 100 A, 3P, 600 V AC. Interrupting: 25 kA @600 V; 65 kA @480 V (HJ class). P-frame example: 1,200 A, 600 V (PJA36120). Trip options: thermal-magnetic and electronic. Recall history: J-frame CPSC recall (2014/2015). Constructions: I-Line and unit-mount; 80% and 100%-rated versions. Counterfeit exposure: 2007 CPSC counterfeit recall; active OEM program.
Major variations
Seven frames by ampacity (B, H, J, L, M, P, R), each available in I-Line plug-on and unit-mount constructions, with thermal-magnetic or Micrologic electronic trip units and both 80% and 100%-rated versions. Interrupting tiers vary within a frame by suffix, so two breakers with the same ampere rating can differ by 40 kA of interrupting capability. The ComPacT NS siblings documented in the M/P/R catalog share the same physical envelopes in several sizes, which is a common source of substitution errors on used purchases.
Configurations and options
Seven frames by ampacity, B, H, J, L, M, P and R, each available in I-Line plug-on or unit-mount construction, with thermal-magnetic or Micrologic electronic trip units and in both 80% and 100%-rated versions. Interrupting capability varies by suffix within a frame, so two breakers of the same ampere rating can differ by 40 kA of interrupting capability and by a large multiple in price. A documented example: an HJA36100 is 100 A, 3-pole, 600 V AC at 25 kA, or 65 kA at 480 V. On used stock, date codes and OEM serial verification are the two nameplate checks that decide whether a unit is saleable at all.
Compatibility and dependencies
These are UL 489 molded case breakers rather than metal-enclosed switchgear, and mounting governs fit: an I-Line plug-on breaker seats on an I-Line bus stab and a unit-mount breaker does not, so panelboard and switchboard interior compatibility has to be confirmed before purchase. Interrupting rating must be coordinated with the available fault current at the point of installation rather than taken from the frame's ceiling, and the 80% or 100% rating basis determines continuous loading. ComPacT NS siblings documented in the M, P and R catalog share several physical envelopes, which is the most common source of substitution error. Electronic-trip units carry their own accessory and communications ecosystem.
Pricing and availability
Published price range: $500 - $7,250. Trend: rising Molded case breakers track the 47%-since-2021 category curve at the commodity end: common 100 A frames hold 500-700 USD new-channel while electronic-trip P/R frames behave like small ACBs at 5,000-10,000 USD refurbished. Recall-clear date codes and OEM-verified serials carry a growing premium as counterfeit awareness spreads. Lead time, new: Same-day to weeks (distributor stock, common frames). Lead time, used or refurbished: Same-day to 2 weeks. Warranty, used: 1-year typical from reconditioning dealers.
Lifecycle and maintenance
LV power circuit breakers serve 30-40 years on 3-5 year maintenance cycles per ANSI/NETA MTS and NFPA 70B, with mechanism lubrication and injection testing the critical items. A deep reconditioning ecosystem (Relectric, NAS, Bay Power, Bullock) tests to NETA specifications and warrants units for 1 year. OEM trip-unit retrofit programs (Eaton PXR, ABB EntelliGuard R, Siemens 3WA retrofit) extend installed platforms past electronics obsolescence, which sustains used-breaker values.
Thermal and emissions profile
Switchgear produces no combustion emissions; the regulatory profile is electrical safety and materials. NFPA 70B became a standard in its 2023 edition, making maintenance programs mandatory rather than recommended, and arc-flash rules (NFPA 70E) govern work practices. LV air-insulated gear carries no F-gas exposure, and construction standards (UL 891, UL 1558, IEEE C37.20.1) plus arc-resistant options under IEEE C37.20.7 define the safety envelope buyers should verify.
Common failure points
- Mechanism springs and lubrication — Slow trips, trip-free on close, failure to latch on aged units
- Trip unit electronics — Nuisance trips or no-trip from aged or obsolete electronics
- Contacts and arc chutes — Overheating and interruption failure from eroded contacts or cracked chutes
- Secondary wiring — Control faults from damaged secondary disconnects and aux switches
- Provenance and counterfeits — Counterfeit or mis-labeled breakers fail catastrophically under fault
- Cassette and racking wear — Misalignment and cluster contact damage on worn cradles
Inspection checklist
Mechanism: exercise open/close 10+ cycles; verify the charge/close/trip sequence completes and the mechanism latches on every close; treat any failure to latch on close as a finding and check it against the OEM acceptance procedure. Trip curve: primary injection test; NETA field data shows 22% of LV power breakers off their published curves. Secondary injection: verify all 4 protection functions (LSIG) against settings; record as-found/as-left values. Contact resistance: micro-ohm test each pole; investigate readings above 1.5x sister poles. Insulation resistance: megger at 1,000 V per ANSI/NETA MTS acceptance tables. Contact wear: inspect arcing contacts and wear indicators against the OEM replacement limit. Arc chutes: remove and inspect for cracks, erosion, and metal splatter; replace damaged chutes. Lubrication: verify mechanism grease condition; dried lubricant is the leading slow-trip cause on 20+ year units. Racking: exercise draw-out mechanism through connect/test/disconnect; verify shutter operation.
Procurement channels
Breaker Outlet, Integrity Electric, Bay Power, Relectric, and eBay carry deep priced stock; KWSD and jpnpartsale handle refurbished large frames. Verify serials with the OEM and screen recall date codes before buying any used frame.
Regional notes
North American UL 489 product at 600 V class for 60 Hz systems, sold under the Square D brand, with the ComPacT and NSX families covering the equivalent duties in IEC markets. Two North American screens are mandatory on used stock and both are jurisdiction-specific: the CPSC recall of genuine PowerPact J-frame breakers in 2014 and 2015 makes date-code checks necessary, and the 2007 CPSC counterfeit Square D recall plus Schneider's active counterfeit programme, which cites 189 trademark-abusing shadow companies, make OEM serial verification part of any credible resale.