Siemens / ITE ET225-3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
Siemens / ITE ET225-3125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Maintaining existing electrical infrastructure is simple with the Siemens ET225-3125 legacy molded case circuit breaker. Designed to fit seamlessly into ITE CDP-7, as well as Siemens P4, P5, SB1, and SB2 panelboards, this 3-pole device avoids costly system overhauls. Rated for 125 amps at 600VAC, it features fixed thermal and magnetic trip functions for standard LI protection. While the JXD63B125 serves as its modern substitute, this original unit mount breaker ensures a perfect physical match.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | ET225-3125-R |
| Series | ET225 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ITE CDP-7, Siemens P4, P5, SB1, SB2 Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| 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 |
Product FAQs
6 answersWhich panelboards accept the ET225-3125 circuit breaker?
This legacy unit mount breaker is designed to fit seamlessly into older ITE CDP-7 enclosures, as well as Siemens P4, P5, SB1, and SB2 panelboards. Using this exact replacement avoids the need for costly system overhauls or panel modifications.
What is the modern substitute for the ET225-3125?
The Siemens JXD63B125 serves as the current replacement for this legacy breaker. However, installing the original ET225-3125 ensures a perfect physical match in older enclosures without requiring retrofit kits.
What wire sizes are supported by the terminals on the ET225-3125?
The breaker comes equipped with standard lugs that accommodate either copper or aluminum conductors ranging from 4 AWG up to 350 kcmil, providing flexibility for various feeder sizes.
Can the ET225-3125 be utilized in DC power systems?
Yes, in addition to its AC ratings, this breaker is certified for direct current applications up to 250V DC, delivering a 10 kAIC interrupting capacity for specialized industrial setups.
Does the ET225-3125 allow for field-adjustable trip settings?
No, this thermal-magnetic breaker is built with fixed thermal and fixed magnetic trip elements. It provides standard long-time and instantaneous (LI) overcurrent protection without adjustable dials.
What type of fault protection does the ET225-3125 provide?
It utilizes a thermal-magnetic trip unit to provide standard LI (long-time and instantaneous) protection, safeguarding commercial electrical systems against both sustained overloads and sudden short circuits.
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