Siemens / ITE ET-1575 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Quantity
Siemens / ITE ET-1575 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the classic SENTRON family, this 50A thermal-magnetic circuit breaker delivers standard 10kAIC interrupting capacity for 240VAC and 250VDC systems. The 3-pole unit mount configuration allows for straightforward installation into legacy ITE and Siemens E-Frame panelboards. While this specific model is a discontinued legacy component, it provides an exact fit without requiring adapters. Facilities can also utilize the ED63B050 as a modern cross-reference substitute.Specifications
| Brand | Siemens / ITE |
|---|---|
| Series | ET |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 5kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ITE / Siemens E-Frame Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Standard Interrupting Capacity |
Product FAQs
5 answersWhich panelboards accept the ET-1575 circuit breaker?
This unit-mounted breaker is engineered for legacy ITE and Siemens E-Frame panelboards, switchboards, and motor control centers. It provides an exact fit for older infrastructure without requiring modification or mounting adapters.
What wire sizes are compatible with the ET-1575 lugs?
The factory-installed lugs accept copper or aluminum conductors ranging from 14 AWG to 1/0 AWG. Electricians should verify that the selected wire size matches the 50A circuit requirements and local electrical codes.
What type of protection does the LI trip function provide?
The fixed thermal-magnetic trip unit utilizes a Long-Time (L) function for delayed tripping during sustained overloads and an Instantaneous (I) function to immediately clear severe short circuits.
What are the maximum fault current interrupting ratings for the ET-1575?
The breaker is rated to safely clear fault currents up to 10 kA at 240V AC and 5 kA at 250V DC. These ratings make it suitable for standard commercial and industrial distribution panels where the available fault current does not exceed these limits.
Is the ET-1575 still manufactured by Siemens?
No, the ET-1575 is a discontinued legacy breaker originally produced under the ITE and Siemens brands. When exact replacements are unavailable, modern Siemens E-Frame breakers from the SENTRON family can be used as direct drop-in substitutes.
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