Siemens G3B030 Molded Case Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Siemens
G3B030
Molded Case Circuit Breaker
Brand
Siemens
SKU
G3B030
Quantity
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Siemens G3B030 - 30A 3 Pole Molded Case Circuit Breaker
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Description
Utilizing a rugged thermal-magnetic mechanism, this 30A commercial breaker ensures consistent overload and short-circuit mitigation. The trip-free design guarantees contacts open under fault conditions. Installation requires a bolt-on connection into compatible Siemens enclosures, specifically P1, P2, and P3 panelboards. The NGB3B030 serves as the modern substitute for this component. With an interrupting rating of 65kA at 240VAC, it meets demanding specifications and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | G3B030-R |
| Series | G3B |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480Y/277VAC, 14kA @ 600Y/347VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards, SB Switchboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG (Cu), 12 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the G3B030 breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as SB series switchboards.
What are the acceptable wire sizes for the lugs on this breaker?
The terminal lugs accept 14 to 10 AWG copper wire or 12 to 10 AWG aluminum wire.
Can this Siemens breaker replace older ITE G3B models?
Yes. Siemens acquired ITE and continues to manufacture these breakers to the same physical and electrical specifications. The G3B030 is a direct replacement for legacy ITE 30A G3B breakers.
Are the trip settings on the G3B030 adjustable?
No, this breaker features a fixed thermal and fixed magnetic trip unit (LI - Long-Time and Instantaneous) and cannot be adjusted in the field.
Does this breaker provide ground fault or arc fault protection?
No, the G3B030 is a standard thermal-magnetic breaker providing overload (long-time) and short-circuit (instantaneous) protection. It does not include GFCI or AFCI capabilities.
How does the G3B030 connect to the panelboard bus?
It utilizes a bolt-on connection, securing directly to the busbars of compatible Siemens panelboards for a reliable, vibration-resistant installation.
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