Siemens HEG3B030B Molded Case Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
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Siemens HEG3B030B - 30A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
The Siemens HEG3B030B molded case circuit breaker protects circuits against overloads and short circuits. This 30A, 3-pole, 3-phase breaker is rated 65kAIC at 480V, with voltage ratings of 240VAC, 480VAC, 600Y/347VAC, 250VDC and 500VDC. The HEG series uses an EG frame with bolt-on mounting and a load side lug. Fixed thermal and fixed magnetic trip settings provide long-time and instantaneous protection.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HEG3B030B |
| Series | HEG |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 30kA @ 250VDC, 30kA @ 500VDC |
| Frame Type | EG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4 and P5 Panelboards, Switchboards |
| Wire Gauge | 14-1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Alarm Switch, Auxiliary Switch, Shunt Trip, Undervoltage Release |
|---|---|
| Standards | NEMA AB 1, UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
8 answersHow should I use the 30A rating when selecting the Siemens HEG3B030B?
The 30A rating is the breaker's rated current. Use it when coordinating circuit protection with the calculated load and conductor ampacity, including applicable continuous-load requirements.
How does the 65kAIC interrupting rating guide selection?
At 480V, the breaker has a 65kAIC interrupting rating. Compare that rating with the available fault current at the installation point; the available fault current must not exceed the interrupting rating.
Can I select this breaker for a DC circuit?
The breaker carries 250VDC and 500VDC ratings. For a DC circuit, use the applicable DC rating when selecting voltage protection rather than relying on an AC voltage rating.
What does the fixed thermal-magnetic trip mean in use?
The thermal element provides long-time overload protection, while the magnetic element provides instantaneous response to high fault current. Both are fixed, so select the breaker for the required protection rather than planning to adjust its trip settings.
What conductor sizes can I terminate at the load-side lug?
The conductor range is 14 AWG through 1/0 AWG. Choose a conductor within that range that also meets the circuit's ampacity requirements; the terminal range alone does not determine the correct conductor size.
What installation method and load connection does this breaker use?
This breaker uses bolt-on mounting and a load-side lug connection. Plan installation around the bolted mounting method and termination of the outgoing conductor at the load-side lug.
Is this a three-pole breaker for a three-phase circuit?
Yes. This is a three-pole, three-phase breaker. Use those characteristics when selecting protection for the phase conductors, together with the circuit's current and voltage requirements.
Which AC voltage ratings should I consider for my circuit?
The AC ratings are 240VAC, 480VAC and 600Y/347VAC. Select the rating that matches your circuit voltage and system configuration, using the 600Y/347VAC rating for a wye system.
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