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Siemens E43B090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Siemens
E43B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
E43B090
Quantity
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Siemens E43B090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Operating with a 40C ambient calibration, this 90A molded case breaker provides consistent commercial power distribution. The three-pole configuration utilizes a non-interchangeable trip unit for precise LI protection. Installation is straightforward across Siemens Sentron panelboards, SB switchboards, and older ITE F-Series enclosures. When maintenance requires a modern equivalent, the ED43B090 serves as the official replacement. Tested to deliver 18 kAIC at 480VAC, the device is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | E43B090 |
| Series | E4 |
| Amperage | 90A |
| 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 | 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, Undervoltage Release |
|---|---|
| Accessories | Load Lugs (LN1E100) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, 40C Ambient Calibration |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens E43B090?
This bolt-on breaker is designed for use in Siemens Sentron panelboards, SB switchboards, and legacy ITE F-Series panelboards.
Can the Siemens E43B090 replace an older ITE brand E43B090?
Yes. Siemens acquired ITE and continued manufacturing the E4 frame breakers under the same catalog numbers. A Siemens E43B090 is a direct, interchangeable replacement for an ITE E43B090.
What type of wire can be used with the E43B090 lugs?
The factory-installed lugs accept both copper (Cu) and aluminum (Al) conductors ranging from 10 AWG to 1/0 AWG. Ensure proper torque specifications are followed during installation as labeled on the breaker.
Is the E43B090 suitable for direct current (DC) systems?
Yes, this thermal magnetic breaker is rated for use in DC systems up to 250VDC, where it provides a 30kA interrupting rating.
Are the trip settings adjustable on the E43B090?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions are factory set and cannot be adjusted in the field.
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