Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | SELA36AT0150 |
| Manufacturer | General Electric (GE) |
| Product Family | Spectra RMS |
| Breaker Type | SELA electronic molded case circuit breaker |
| Frame Rating | 150 A |
| Poles | 3 |
| System Voltage | 120 / 240 / 277 / 480 / 600 VAC |
| Trip Function | LSI — Long-Time, Short-Time, Instantaneous |
| Trip Technology | Digital solid-state RMS sensing |
| 600 VAC Interrupting Rating | 25 kAIC |
| 480 VAC Interrupting Rating | 65 kAIC |
| 240 VAC Interrupting Rating | 100 kAIC |
| Connection | Bolt-on |
| Lugs | TCAL18; terminal hardware configuration must be confirmed |
| Rating Plug | Interchangeable; 110 A, 125 A, and 150 A configurations are documented |
| Approx. Dimensions | 6.31 × 4.12 × 3.38 in. |
| Protection System | Electronic trip |
| Current Metering | No |
| Reverse Feed | Suitable |
| Standards / Listings | UL / CSA; CE marking documented |
The important procurement detail is that SELA36AT0150 identifies the 150A SELA frame, not necessarily every component required for a complete field installation. GE/ABB documentation shows interchangeable front-mounted rating plugs, with 110A, 125A, and 150A options associated with this frame. Terminal lugs also need to be checked separately.
Product Introduction
The GE SELA36AT0150 is a three-pole Spectra RMS electronic molded case circuit breaker designed for industrial and commercial power distribution. Its SELA frame is rated at 150A and supports systems up to 600 VAC, with digital solid-state RMS sensing and LSI protection. The breaker uses an interchangeable rating-plug architecture, allowing the installed trip rating to be established separately from the 150A frame.
For maintenance teams, the main value is preserving an existing Spectra RMS installation without treating the breaker as a generic 150A MCCB. The frame, rating plug, trip configuration, terminals, panelboard kit, and interrupting requirement all matter. ABB’s current cross-reference documentation specifically identifies SELA36AT0150 as a Spectra frame and maps it to multiple Tmax XT retrofit configurations depending on trip unit and interrupting requirements.
SELA36AT0150
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
A common maintenance problem is finding a replacement for an older Spectra RMS breaker while the original panelboard remains in service. The mistake is to match only 150A, three-pole, 600V and assume the job is done. SELA36AT0150 uses interchangeable rating plugs and different interrupting ratings apply at different system voltages, so the existing rating plug, available fault current, terminal arrangement, and panelboard compatibility need to be checked before procurement.
Typical Applications
- Industrial distribution panels — feeder protection for three-phase motor and process-control loads.
- Manufacturing facilities — replacement of failed Spectra RMS breakers in existing panelboards and switchboards.
- Process plants — protection of auxiliary power feeders where the original Spectra architecture remains installed.
- Electrical retrofit projects — evaluation of an existing GE Spectra installation before transition to a current breaker platform.
Technical Pitfalls to Avoid
- Do not equate the 150A frame with a 150A trip setting.
ABB’s documentation lists 110A, 125A, and 150A rating plugs for the SELA36AT0150 frame. Check the rating plug installed in the existing breaker. - Check the available fault current at the actual installation voltage.
The documented UL interrupting ratings vary from 100 kA at 240 VAC to 65 kA at 480 VAC and 25 kA at 600 VAC. Selecting based only on the 150A current rating can create a serious protection mismatch. - Verify whether you are buying a frame or a complete breaker assembly.
The designation is used for the SELA frame, while rating plugs and terminal/lug components are separately identified. Confirm exactly what is included before accepting a replacement as drop-in.
Related Products
- SEDA36AT0150 — Same 150A Spectra frame family with a different breaker configuration; useful when comparing alternative protection characteristics.
- SEHA36AT0150 — Another 150A Spectra RMS frame option for applications requiring a different interrupting/protection configuration.
- SEPA36AT0150 — 150A Spectra frame variant intended for applications with different current-limiting characteristics.
- SFLA36AT0250 — 250A Spectra RMS frame for higher-current feeders; not a direct 150A substitute. ABB documentation identifies it alongside in the Spectra family.
- SEHA36AT0030 — 30A Spectra RMS frame, useful for smaller feeder or branch protection applications.
- SGLA36AT0600 — 600A Spectra RMS frame for substantially higher feeder capacity.
- SRPE150A110 — 110A rating plug associated with the 150A SELA frame.
- SRPE150A125 — 125A rating plug option for the same 150A frame.
- SRPE150A150 — 150A rating plug option for the frame.
- ABB Tmax XT4 retrofit configurations — Current retrofit alternatives documented by ABB for the Spectra frame; the correct XT configuration depends on interrupting rating, trip unit, and 80%/100%-rated application requirements.
