ABB S3N030TW Molded Case Circuit Breaker
- 30A
- 3 Pole
- Unit Mount
Quantity
ABB S3N030TW - 30A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for commercial and industrial power distribution, this 30-amp Isomax S3 breaker features fixed thermal and magnetic trip elements. It provides reliable long-time and instantaneous protection for complex electrical systems. Designed to mount into ABB panelboards and motor control centers, it is a reverse-feed capable unit. While it has been superseded by the T3N030TW, this exact match maintains compatibility with existing Isomax infrastructure.Specifications
| Brand | ABB |
|---|---|
| Part Number | S3N030TW |
| Series | Isomax S3 |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 14kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 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, Bell Alarm, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhat is the direct replacement for the legacy ABB S3N030TW?
The S3N030TW is part of the legacy Isomax S3 family and has been superseded by the Tmax series T3N030TW. Using the original S3N030TW allows you to maintain exact physical and electrical compatibility with existing Isomax infrastructure without retrofitting.
Is the S3N030TW suitable for reverse feed applications?
Yes, all circuit breakers in the ABB Isomax S3 family, including the S3N030TW, are reverse-feed capable.
How are internal accessories configured in the Isomax S3 frame?
Internal accessories are field-installable. Shunt trips and undervoltage releases (UVR) must be mounted in the left accessory cavity, while auxiliary contacts and bell alarm switches are installed in the right cavity.
Where can the S3N030TW be installed?
This unit-mount, bolt-on breaker is designed for installation in ABB panelboards, switchboards, and motor control centers configured for the Isomax S3 frame.
Can the trip settings on the S3N030TW be adjusted in the field?
No, this breaker is equipped with a non-interchangeable thermal-magnetic trip unit. Both the long-time (thermal) and instantaneous (magnetic) trip functions are fixed at the factory for 30A protection.
Can this breaker be used in DC power systems?
Yes, the S3N030TW is rated for DC applications up to 500VDC, providing a 25kA interrupting capacity for DC circuits.
What is the maximum amperage capacity of the Isomax S3 frame?
While the S3N030TW is configured for 30A, the ABB Isomax S3 frame itself supports breaker configurations ranging from 15A up to a maximum of 225A.
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