Siemens HQ3B100 Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Siemens HQ3B100 - 100A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding electrical systems, this 100-amp bolt-on breaker features a high 65kAIC interrupting capacity at 240VAC. The three-pole configuration utilizes fixed thermal and magnetic trip elements to defend against overcurrents and short circuits. Designed to fit Siemens commercial panelboards, it provides a stable bolted connection. It serves as the original version of the HBQ3B100 replacement model. Equipped with load side lugs, this HACR-rated unit ensures common trip operation.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HQ3B100-R |
| Series | HQ |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | UL 489, CSA C22.2 No. 5, HACR Rated |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Common Trip, Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens HQ3B100 circuit breaker?
The HQ3B100 is a bolt-on miniature circuit breaker designed specifically for Siemens commercial panelboards. It requires a bolted connection to the busbar rather than a plug-on installation.
What is the relationship between the HQ3B100 and the HBQ3B100?
The HQ3B100 serves as the original version of the HBQ3B100 replacement model. Both are 100A, 3-pole, bolt-on breakers designed for Siemens commercial panels.
What wire sizes are accepted by the lugs on the HQ3B100?
The load side lugs accept 8 to 1 AWG copper wire or 6 to 1/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation for a secure connection.
Is the Siemens HQ3B100 suitable for HVAC applications?
Yes, this circuit breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.
How does the trip mechanism operate on this 3-pole breaker?
The HQ3B100 features a common trip operation. If an overcurrent or short circuit occurs on any single pole, the internal mechanism ensures all three poles trip simultaneously to disconnect power safely across all phases.
What does the 65kAIC rating indicate for the HQ3B100?
The 65kAIC rating means this breaker can safely interrupt up to 65,000 amps of fault current at 240VAC. This high interrupting capacity makes it suitable for commercial systems with high available fault currents.
How does the thermal magnetic trip unit protect the circuit?
The HQ3B100 utilizes fixed thermal and magnetic trip elements. The thermal component provides long-time protection against sustained overloads, while the magnetic component delivers instantaneous tripping during severe short circuits.
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