Siemens HF3B050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
Siemens HF3B050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty power distribution, the Siemens HF3B050 provides reliable thermal-magnetic protection for commercial facilities. This 3-pole, 50-amp molded case circuit breaker features a bolt-on mounting style for secure installation into Sentron P1, P2, and P3 panelboards and switchboards. With a high interrupting rating of 65kA at 480VAC, it ensures robust defense against overloads and short circuits. It is replaced by the newer HHED63B050 model for future upgrades.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HF3-B050-R |
| Series | HF |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens HF3B050 circuit breaker?
This breaker is designed for bolt-on installation in Siemens Sentron panelboards, specifically P1, P2, and P3 models. It is also compatible with standard Siemens switchboards and motor control centers.
Are the terminal lugs on the HF3B050 rated for both copper and aluminum wiring?
Yes, the included lugs are dual-rated for both copper (Cu) and aluminum (Al) conductors, accepting wire sizes from 10 AWG up to 1/0 AWG.
Is there a direct replacement for the legacy HF3B050 breaker?
Yes, for future upgrades or replacements, the HF3B050 crosses over to the newer HHED63B050 model. Note that mounting requirements may differ depending on your specific panelboard configuration.
Are the trip settings adjustable on the HF3B050?
No, this breaker features a fixed thermal and fixed magnetic trip unit (LI functions), meaning the long-time and instantaneous trip thresholds cannot be field-adjusted.
Does the HF3B050 provide ground fault or arc fault protection?
No, this is a standard thermal-magnetic circuit breaker designed for overload and short-circuit protection. It does not include integrated GFCI or AFCI capabilities.
Is the HF3B050 suitable for reverse-feed applications?
Yes, this breaker is reverse-feed capable, allowing it to be back-fed in compatible panelboards or switchboards where permitted by local electrical codes.
Is the HF3B050 rated for HVAC equipment?
Yes, it is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires a 50A, 3-pole breaker.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
- TJTravis J.ReviewingSiemens HF364 Heavy Duty Safety SwitchI recommend this productRated 5 out of 5 stars5/18/22fast!
wow great service
- SNShane N.ReviewingFederal Pacific HF631100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/28/18Excellent Service and Fast Shipping
Breaker was shipped from the US to remote northern LAbrador, Canada very quickly and was in excellent condition. I would highly recommend SuperBreakers.