Siemens HB3B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
HB3B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
HB3B070
Quantity
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Siemens HB3B070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Designed for commercial power systems, the Siemens HB3B070 is a 3-pole, 70A MCCB in the HBQ series. It utilizes thermal-magnetic trip elements to deliver precise long-time and instantaneous (LI) protection. This bolt-on breaker installs into Siemens and ITE Series 1-5 legacy panelboards. It includes load side lugs compatible with 8-1 AWG copper or 6-1/0 AWG aluminum wire. Rated for 65kAIC at 240VAC, it ensures defense against severe electrical faults. It is UL 489 listed and HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | HBQ |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens/ITE Legacy Panelboards (Series 1-5) |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 AWG (Al) |
| 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, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
5 answersWhat panelboards are compatible with the Siemens HB3B070?
This bolt-on breaker is designed for use in Siemens and legacy ITE panelboards (Series 1-5) that accept BQ frame circuit breakers.
Can the Siemens HB3B070 replace an older ITE HB3B070?
Yes. Siemens acquired ITE, and the current Siemens HB3B070 is the direct, exact replacement for the legacy ITE HB3B070 circuit breaker.
What is the difference between the Siemens B3B070 and HB3B070?
The difference is the interrupting capacity. The standard B3B070 has an interrupting rating of 10kAIC at 240VAC, whereas the HB3B070 is the high-interrupting version rated at 65kAIC at 240VAC.
Is the HB3B070 breaker HACR rated?
Yes, Siemens BQ and HBQ frame circuit breakers are HACR rated, meaning they are approved for use with heating, air conditioning, and refrigeration equipment.
How is the HB3B070 installed in a panelboard?
The HB3B070 is a bolt-on breaker that fastens directly to the buswork of compatible Siemens or ITE panelboards. Always torque the bus connections and load side lugs to the exact specifications printed on the breaker label or panelboard dead front.
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