Siemens G3B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
G3B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
G3B070
Quantity
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Siemens G3B070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Serving commercial and industrial facilities, this 70-amp BQ family breaker offers fixed long-time and instantaneous trip functions. The rugged molded case construction ensures durability in demanding electrical environments. Installation is straightforward into Siemens P1, S1, S2, and SE series panelboards via a secure bolt-on mount. Facility managers should note the BQ3B070 is the designated modern replacement for this unit. Providing a 10kAIC rating at 240VAC, it includes load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | G3B070-R |
| Series | BQ |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, S1, S2, SE Panelboards |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhich Siemens panelboards accept the G3B070 circuit breaker?
This 3-pole breaker is compatible with Siemens P1, S1, S2, and SE series panelboards.
What is the acceptable wire gauge range for the G3B070 lugs?
The terminal lugs accommodate 8 to 1 AWG for copper conductors and 6 to 1/0 AWG for aluminum conductors.
What does the LI trip function on the G3B070 indicate?
The LI designation means the thermal-magnetic trip unit provides Long-Time protection for gradual overloads and Instantaneous protection for short circuits. The trip settings on this model are fixed.
Does the G3B070-R catalog number differ from the standard G3B070?
No, G3B070-R is an alternate catalog number for the exact same Siemens and ITE 70A breaker. The -R suffix does not indicate a different frame or electrical specification.
Will this breaker replace an older ITE G3B070?
Yes, Siemens acquired ITE and continues to manufacture this breaker to the original specifications. It is a direct replacement for legacy ITE G3B070 breakers.
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