ABB S5N400BW Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
ABB S5N400BW - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty commercial and industrial applications, this SACE Isomax S5 breaker utilizes a PR211 solid-state trip unit to deliver reliable LI protection. Rated for 400 amps, it provides a 35kAIC interrupting capacity at 480VAC. The unit mounts into ABB SACE Isomax S5 enclosures and switchboards, offering current-limiting performance. For facilities upgrading their systems, this model is typically replaced by the Tmax T5S400BW, making it ideal for exact-match maintenance needs.Specifications
| Brand | ABB |
|---|---|
| Series | S5N |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC |
| Frame Type | S5 |
|---|---|
| Terminal Type | Lugs |
| For Use With | ABB SACE Isomax S5 Enclosures and Switchboards |
| Wire Gauge | (2) 3/0 AWG - 250 kcmil |
| Max Wire | 250 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Rotary Handle, Terminal Shields, Phase Barriers, Lugs |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Solid State Trip Unit (PR211) |
Product FAQs
6 answersWhat enclosures and switchboards is this breaker compatible with?
This unit is designed to mount directly into ABB SACE Isomax S5 enclosures and switchboards.
What type of trip unit is installed in the S5N400BW?
This breaker utilizes a PR211 solid-state electronic trip unit, which provides adjustable Long-Time and Instantaneous (LI) protection.
Are the trip settings adjustable on this breaker?
Yes, the PR211 electronic trip unit features adjustable dials for both Long-Time and Instantaneous (LI) trip functions to coordinate with your specific system requirements.
What wire sizes are accepted by the standard lugs?
The standard lugs accept two 3/0 AWG to 250 kcmil cables per phase.
What is the modern replacement for this Isomax S5 breaker?
For facilities upgrading their electrical systems, this Isomax S5 model is typically replaced by the ABB Tmax T5S400BW.
What does the N in the S5N frame designation indicate?
The N indicates a Normal interrupting capacity for the Isomax S5 frame, which provides a maximum interrupting rating of 35kAIC at 480VAC.
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