Siemens HEG3B015 Circuit Breaker | 15A 3-Pole 600V 65kA@480V Bolt-On | VL Series MCCB
Siemens HEG3B015 Circuit Breaker | 15A 3-Pole 600V 65kA@480V Bolt-On | VL Series MCCB
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Siemens HEG3B015 — 15A 3-Pole Molded Case Circuit Breaker
The Siemens HEG3B015 is a high-interrupting capacity, thermal magnetic molded case circuit breaker (MCCB) engineered for demanding industrial and commercial power distribution applications. With a 15-amp continuous rating, 3-pole configuration, and a maximum voltage of 600V AC, this breaker delivers reliable overcurrent and short-circuit protection for critical electrical systems.
Featuring a 65kA interrupting rating at 480V, the HEG3B015 is built to handle high fault-current environments — making it an ideal choice for industrial panels, switchboards, and motor control centers where performance and safety are non-negotiable.
Key Features
- Current Rating: 15 Amps (continuous)
- Poles: 3-Pole
- Voltage Rating: 600V AC
- Interrupting Capacity: 65kAIC @ 480V
- Trip Type: Thermal Magnetic (Long Time & Instantaneous)
- Connection Type: Bolt-On
- Series: VL (High Interrupting Capacity)
- Manufacturer: Siemens
- Part Number: HEG3B015
Why Choose the Siemens HEG3B015?
The HEG3B015 belongs to Siemens' VL Series of molded case circuit breakers — designed for high interrupting duty in commercial and light industrial applications. The thermal magnetic trip mechanism provides dual-layer protection:
- Long-time delay for overload protection (bimetallic thermal element)
- Instantaneous trip for short-circuit protection (magnetic element)
The bolt-on mounting ensures a secure, vibration-resistant connection to bus bars in load centers and panelboards — reducing the risk of loose connections over time.
Typical Applications
- Industrial control panels and switchboards
- Commercial electrical distribution systems
- Motor branch circuit protection
- Feeder and branch circuit protection up to 600V
- Retrofit and replacement in existing Siemens VL Series installations
Technical Specifications
| Part Number | HEG3B015 |
| Ampere Rating | 15A |
| Number of Poles | 3 |
| Voltage Rating (Max) | 600V AC |
| Interrupting Rating | 65kAIC @ 480V |
| Trip Type | Thermal Magnetic |
| Trip Functions | Long Time, Instantaneous |
| Mounting / Connection | Bolt-On |
| Series | VL (High Interrupting) |
| Brand | Siemens |
| Condition | New |
| SKU | HEG3B015-N |
Frequently Asked Questions
What does the HEG3B015 protect against?
The HEG3B015 protects electrical circuits against both overloads (via thermal trip) and short circuits (via instantaneous magnetic trip), preventing equipment damage and reducing fire risk.
Is the HEG3B015 compatible with Siemens panelboards?
Yes. The HEG3B015 is a bolt-on type MCCB designed to work with Siemens VL Series compatible panelboards and switchboards. Always verify compatibility with your specific panel before installation.
What is the difference between HEG3B015 and HEG3B015B?
The HEG3B015B is the lug-in-box variant of the same breaker, which includes additional terminal lugs for direct conductor connections. The HEG3B015 uses the standard bolt-on bus configuration.
Can this breaker be used in a 480V system?
Yes. The HEG3B015 is rated for up to 600V AC and carries a 65kA interrupting rating specifically at 480V, making it suitable for 480V three-phase distribution systems.
What condition is this unit in?
This unit is sold as New (SKU: HEG3B015-N).