Siemens EH1M040 Molded Case Circuit Breaker
- 40A
- 1 Pole
- Bolt-On
Quantity
Siemens EH1M040 - 40A 1 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Designed to handle commercial electrical loads, the Siemens EH1M040 is a 1-pole, 40-amp molded case circuit breaker. It provides essential long-time and instantaneous trip functions for 277VAC circuits. This E-Frame breaker utilizes a bolt-on connection to integrate with Siemens and ITE P1, E2, and F2 panelboards. It serves as an effective replacement for older units. Built with a non-interchangeable thermal-magnetic trip unit, it achieves a 10kAIC rating and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EH1M040-R |
| Series | EH |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 277VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 277VAC |
| Frame Type | EH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / ITE Panelboards (Type E2, F2, P1) |
| 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 | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, 50C Ambient Calibration |
Product FAQs
7 answersWhat panelboards are compatible with the Siemens EH1M040?
This E-Frame breaker is designed for bolt-on installation in Siemens and legacy ITE panelboards, specifically Type E2, F2, and P1 panels.
What wire sizes and materials are supported by the EH1M040 lugs?
The factory-installed lugs accept wire gauges from 10 AWG up to 1/0 AWG. They are rated for both copper and aluminum conductors.
Is the EH1M040 suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for heating, air conditioning, and refrigeration applications that require a 40-amp, 277V circuit.
Can this breaker be used to replace older ITE EH-frame breakers?
Yes, Siemens acquired ITE and continues to support the legacy E-Frame footprint. The EH1M040 serves as a direct bolt-on replacement for older ITE 40-amp, 1-pole EH breakers.
What type of trip mechanism does the EH1M040 use?
It utilizes a non-interchangeable thermal-magnetic trip unit. This provides both long-time thermal protection against overloads and instantaneous magnetic protection against short circuits.
How does the EH1M040 connect to the panelboard bus?
It features a bolt-on connection type, which provides a secure, vibration-resistant mechanical and electrical connection to the panelboard busbars compared to plug-on designs.
What does the 10kAIC rating signify for this 277V breaker?
The 10kAIC rating indicates the maximum fault current the breaker can safely interrupt at 277VAC without sustaining damage or causing an arc flash hazard.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 7 reviews.
- TSThomas S.Verified BuyerReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/25Great
Thanks
- JMJim M.ReviewingSiemens EH3B040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/24/23They fit perfectly and saved
They fit perfectly and saved us a lot of money by being able to replace just these breakers
- KHKen H.ReviewingSiemens EH3B030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/12/23Great service
Great service and products fast shipping
- JSJerry S.ReviewingSiemens / ITE EH3B070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/20/22Great Price - Breakers Work Fine
My local Supplier was charging me three times the price for a breaker that i bought on super Breakers.
- MRMatt R.ReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/6/2020 Amp Breaker
Received item quickly and in great shape. Thank you!!!