Siemens / ITE ET100-390 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE ET100-390 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy ET100 series, this 90A molded case circuit breaker provides essential thermal-magnetic protection for older commercial and industrial setups. Rated for 600VAC and 250VDC, it delivers a 14kAIC interrupting capacity at 480V. The breaker installs into classic ITE and Siemens F-frame panelboards and switchboards, serving as an exact cross-reference for the FXD63B090 and F3B090. It includes line and load lugs for immediate integration into existing bolt-on configurations.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | ET100-390-R |
| Series | ET100 |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ITE / Siemens F-Frame Panelboards and Switchboards |
| Wire Gauge | 4-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break, HACR Rated |
Product FAQs
6 answersWhat panelboards are compatible with the ET100-390 circuit breaker?
This legacy F-Frame breaker is designed to bolt directly into classic ITE and Siemens F-Frame panelboards and switchboards.
Which Siemens catalog numbers does the ET100-390 replace?
The ET100-390 serves as an exact cross-reference and replacement for the Siemens FXD63B090 and F3B090 90-amp molded case circuit breakers.
Do I need to purchase separate lugs for the ET100-390?
No, the breaker comes with factory-installed lugs that accept copper or aluminum (Cu/Al) wire from 4 AWG to 1/0 AWG.
Can I adjust the trip curve on the ET100-390?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip points cannot be adjusted in the field.
Is the ET100-390 rated for direct current (DC) systems?
Yes, this breaker is certified for DC applications up to 250VDC, providing a 10kA interrupting capacity for those specific setups.
Does the ET100-390 provide ground fault or equipment protection?
No, this is a standard thermal-magnetic breaker that provides basic overload and short-circuit protection. It does not include GFCI, AFCI, or equipment protection (EPD) features.
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