Siemens ED43B045 45A 3-Pole 480V Bolt-On Molded Case Circuit Breaker
Siemens ED43B045 45A 3-Pole 480V Bolt-On Molded Case Circuit Breaker
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The Siemens ED43B045 is a 3-pole, 45-amp thermal magnetic molded case circuit breaker (MCCB) rated for 480VAC systems. Designed for bolt-on panelboard installation, it provides reliable overcurrent and short-circuit protection for commercial and industrial three-phase electrical distribution systems. The ED4 series is trusted by electricians and facilities engineers for its compact footprint, consistent trip performance, and UL 489 listing.
Specifications
| Attribute | Value |
|---|---|
| Part Number | ED43B045 |
| Manufacturer | Siemens |
| Amperage Rating | 45A |
| Voltage Rating | 480VAC |
| Number of Poles | 3 |
| Trip Type | Thermal Magnetic |
| Mount Type | Bolt-On |
| Interrupting Rating | 65kA @ 240V / 25kA @ 480V |
| Standard | UL 489 Listed |
| Frame Series | ED4 |
Key Features
- Thermal magnetic trip mechanism provides accurate overload and short-circuit protection
- Bolt-on design for secure, vibration-resistant mounting in panelboards
- 3-pole configuration for three-phase 480V power distribution
- Compact ED4 frame fits standard Siemens and compatible load centers
- UL 489 Listed — meets National Electrical Code (NEC) requirements
- Field-installable accessories including shunt trip, aux contacts, and locking devices
Common Applications
- Commercial and industrial 480V panelboards and load centers
- Motor branch circuit protection up to 45A
- HVAC equipment feeders and branch circuits
- Manufacturing facility power distribution panels
- Main or branch breaker in 480V three-phase systems
Frequently Asked Questions
What is the Siemens ED43B045 circuit breaker used for?
The Siemens ED43B045 is a 45-amp, 3-pole, 480V bolt-on molded case circuit breaker used to protect three-phase branch circuits and feeder circuits in commercial and industrial panelboards. It safeguards wiring and equipment against overloads and short circuits.
What is the interrupting rating of the ED43B045?
The Siemens ED43B045 has an interrupting rating of 65kA at 240V and 25kA at 480V, making it suitable for most commercial and light industrial 480V distribution applications.
Is the ED43B045 compatible with Siemens panelboards?
Yes. The ED43B045 uses a bolt-on mounting style compatible with Siemens S-series and P-series panelboards. Always verify compatibility with your specific panel model before installation.