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Siemens HE43B040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Siemens
HE43B040
Molded Case Circuit Breaker
Brand
Siemens
SKU
HE43B040
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Siemens HE43B040 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Providing essential overcurrent safety, the Siemens HE43B040 is a 3-pole, 40A molded case circuit breaker. It operates on systems up to 480VAC, delivering standard long-time and instantaneous trip functions for commercial environments. This device installs into Siemens P1, P2, and P3 panelboards using a standard bolt-on configuration. When upgrading older infrastructure, the HED43B040 serves as the modern substitute. With a 25kAIC rating at 480V, it features a non-interchangeable trip mechanism.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HE43B040-R |
| Series | HE |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | UL 489, CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the HE43B040?
This E-frame breaker is designed to bolt directly into Siemens P1, P2, and P3 panelboards.
What type of connections are provided on the HE43B040?
The breaker utilizes a bolt-on connection for the line side to mount to the panelboard bus. The load side features lug terminals that accept 10 to 1/0 AWG copper or aluminum conductors.
What is the modern replacement for the legacy HE43B040 circuit breaker?
When upgrading older infrastructure, the Siemens HED43B040 serves as the modern, direct substitute for this legacy HE-series breaker.
Will this breaker replace an original ITE HE43B040?
Yes. Siemens acquired ITE, and the current Siemens HE43B040 is the exact replacement for older ITE-branded models with the same catalog number.
Is the HE43B040 rated for use in DC systems?
Yes, alongside its 480V AC maximum rating, this breaker is also rated for DC applications up to 250V DC.
Are the thermal and magnetic trip functions adjustable on this breaker?
No, it features a non-interchangeable, fixed thermal-magnetic trip unit. Both the long-time and instantaneous (LI) trip functions are factory set and cannot be adjusted in the field.
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