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Siemens HF3B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
HF3B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
HF3B070
Quantity
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Siemens HF3B070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial applications, the HF3B070 is a 3-pole, 70-amp molded case circuit breaker from the legacy F-frame series. It delivers fixed thermal and magnetic trip functions to safeguard commercial electrical systems up to 600VAC. The bolt-on configuration mounts into standard Siemens panelboards and switchboards. For facility managers maintaining existing infrastructure, this unit is an exact fit and is cross-referenced to the newer HHED63B070.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HF3-B070-R |
| Series | HF |
| Amperage | 70A |
| 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 Panelboards, Switchboards |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
8 answersWhat types of equipment is the HF3B070 designed for?
This breaker is designed for use in Siemens panelboards and switchboards that accept F-frame molded case circuit breakers.
What wire sizes are compatible with the lugs on this breaker?
Standard lugs are included and accept 10 AWG to 1/0 AWG copper or aluminum wire. Ensure you apply the correct torque specifications as labeled on the breaker during installation.
Is the HF3B070 suitable for direct current (DC) systems?
Yes. In addition to its AC ratings, this breaker is rated for up to 250VDC with a 10kA interrupting capacity, allowing it to be used in DC control circuits and battery backup applications.
Are the trip settings on the HF3B070 adjustable?
No, this breaker features fixed thermal (long-time) and fixed magnetic (instantaneous) trip settings. If you require adjustable trip settings, you will need to select a breaker with an electronic trip unit.
How does this breaker mount into the panel?
It uses a bolt-on connection to attach directly to the busbar in compatible Siemens panelboards and switchboards, ensuring a secure mechanical and electrical connection.
Does this breaker provide high interrupting capacity for industrial applications?
Yes, it provides a 65kA interrupting capacity at both 240VAC and 480VAC. This high rating allows it to be safely installed in commercial and industrial environments with substantial available fault currents.
What does the LI trip function indicate on this breaker?
The LI designation means the thermal-magnetic trip unit provides Long-Time (L) protection against overloads and Instantaneous (I) protection against short circuits. Both settings are fixed on this model.
Can I use this breaker to replace an older ITE HF3B070?
Yes. Siemens acquired ITE, and the Siemens HF3B070 is a direct, drop-in replacement for the legacy ITE HF3B070, sharing the same physical dimensions and electrical specifications.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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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.