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Siemens E43B020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Siemens
E43B020
Molded Case Circuit Breaker
Brand
Siemens
SKU
E43B020
Quantity
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Siemens E43B020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Supplying reliable long-time and instantaneous trip functions, this 20-amp molded case breaker supports 240V, 480V, and 250VDC commercial applications. The bolt-on design ensures a stable connection within Siemens Sentron panelboards and legacy ITE F-Series infrastructure. Facility managers often utilize this exact E4 series hardware to maintain older systems, though it has been officially superseded by the ED43B020. It carries an HACR rating and supports reverse feed installations.Specifications
| Brand | Siemens |
|---|---|
| Part Number | E43B020-R |
| Series | E4 |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | E4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, SB Switchboards, ITE F-Series Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG (Cu), 12 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, Undervoltage Release |
|---|---|
| Accessories | Load Lugs (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, 40C Ambient Calibration |
Product FAQs
7 answersWhat panelboards are approved for use with the Siemens E43B020 circuit breaker?
The E43B020 is a bolt-on breaker designed to mount securely in Siemens Sentron panelboards, SB Switchboards, and legacy ITE F-Series panelboards.
Has the E43B020 been replaced by a newer Siemens catalog number?
Yes. While the E43B020 is still widely used to maintain older infrastructure, Siemens has officially superseded this legacy E4 frame breaker with the ED43B020 model.
What gauge and type of wire can be installed in the standard lugs of the E43B020?
The factory-installed lugs accept 14 to 10 AWG copper conductors and 12 to 10 AWG aluminum conductors.
Is the E43B020 rated for direct current (DC) applications?
Yes, this thermal-magnetic breaker is rated for DC systems. It provides an interrupting capacity of 30kA at 250VDC.
Can the thermal or magnetic trip settings on the E43B020 be adjusted in the field?
No. The breaker features fixed thermal and fixed magnetic trip functions (LI) for standard long-time and instantaneous protection. Neither setting can be adjusted.
Can the E43B020 circuit breaker be reverse fed?
Yes, this molded case circuit breaker supports reverse feed installations, meaning it can be wired with line power supplied to either the top or bottom terminals.
Is the Siemens E43B020 HACR rated?
Yes, this breaker carries an HACR rating, making it suitable for group motor applications in heating, air conditioning, and refrigeration equipment.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- JPJeremy P.Rated 5 out of 5 stars9/7/21Molded Case Breakers
Overall we are happy, would have like to had the mounting bolts though.