ABB ST200M Series Miniature Ci...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$162.61
ABB ST200M Series Miniature Circuit Breaker, C-Curve, UL1077

ABB ST200M Series Miniature Circuit Breaker, C-Curve, UL1077

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Model: ST201M-K4

In Stock (leaves warehouse same day if ordered before 3pm ET)

$162.61
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ABB ST200M Series Miniature Circuit Breaker, C-Curve, UL1077

The ABB ST200M Series Miniature Circuit Breaker delivers dependable overcurrent and short-circuit protection for commercial, industrial, and OEM electrical panels. This page covers the full ST200M Series family, available in amperage ratings from 4A through 35A and in both C and K trip characteristics, so electricians and panel builders can select the exact combination needed for a given branch circuit. Every configuration in the series is engineered to the UL1077 standard for supplementary protectors and carries a 10kA interrupt rating, providing robust protection against fault conditions in commercial and industrial branch circuits. As part of ABB's broader circuit protection lineup, the ST200M Series is intended for electricians, panel builders, and facility maintenance teams who need a compact, standards-compliant breaker for supplementary circuit protection duties, with 1-Pole configurations such as the ST201M-C10 available for dedicated single-circuit applications.

Key Features

  • Amperage Options: Available across the series in 4A, 6A, 8A, 10A, and 35A ratings to match common branch-circuit loads.
  • Trip Characteristics: Offered in both C and K trip curves, giving flexibility for circuits with moderate inrush (C) or higher inrush from motors and transformers (K).
  • Interrupt Rating: 10kA short-circuit current rating shared across the series delivers robust protection against fault conditions in commercial and industrial branch circuits.
  • Pole Configuration: 1-Pole configuration available, as in the ST201M-C10, for dedicated single-circuit protection.
  • Standard Compliance: Designed to the UL1077 standard governing supplementary protectors, supporting code-conscious installation practices.
  • Packaging: Supplied individually (1 ea) for straightforward stocking, inventory management, and replacement in the field.
  • Model Reference: Includes the ST201M-C10 configuration, combining C-curve tripping, 10kA interrupt rating, 10A rating, and 1-Pole construction, as one example of the available options.

Certifications & Compliance

  • UL1077 Listed Supplementary Protector

Technical Specifications

  • PDF: Spec Sheet: https://media.distributordatasolutions.com/413/abb/9c8e514df3596ec5194087009b70219170ed947b.pdf

Typical Applications

  • Commercial and Industrial Electrical Panels
  • Supplementary Circuit Protection for Branch Circuits
  • Panelboard and Control Panel Wiring
  • OEM Equipment Protection
  • Renovation and New Construction Electrical Installations
  • Facility Maintenance and Breaker Replacement Programs

Why ABB?

ABB is a globally recognized manufacturer of electrical distribution and protection equipment, and the ST200M Series reflects that engineering discipline with UL1077-compliant construction, a shared 10kA interrupt rating across the series, and a choice of C or K trip characteristics for dependable fault protection. For electrical professionals who need consistent, standards-based circuit protection across a range of amperages, the ABB ST200M Series offers a straightforward, reliable choice backed by ABB's reputation in electrical distribution equipment. Choose ABB miniature circuit breakers for code-compliant, professional-grade performance in demanding electrical environments.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Circuit Breaker
Series:
ST200M
Standards:
UL1077
Department:
Electrical
Product Group:
Circuit Protection
Amperage Rating:
4A - 35A
Configuration:
1-Pole
Product Subgroup:
Circuit Breakers

ABB ST201M-K4 – Frequently Asked Questions

1) Is the ABB ST200M a UL489 branch circuit breaker or a supplementary protector?
The ST200M is a supplementary protector built to UL1077, not a UL489 branch circuit breaker. That distinction matters: a UL1077 device provides additional protection inside equipment or a control panel downstream of a properly rated branch circuit protective device, and it cannot legally serve as the branch circuit overcurrent protection on its own. If the drawing calls for branch circuit protection, look at a UL489 device instead, such as the Square D C60 UL489 Miniature Circuit Breaker, DIN rail mount.
2) What is the difference between the C-curve and K-curve ABB ST201M breakers?
Both trip curves are offered in the ST200M line. The C curve is the general purpose choice, suited to circuits with moderate inrush such as small motors and transformers. The K curve is the higher magnetic setpoint option, so it rides through heavier starting inrush without nuisance tripping. On the ABB side the C curve shows up at 6A (ST201M-C6) and 10A (ST201M-C10), and the K curve at 4A (ST201M-K4), 8A (ST201M-K8) and 35A in three pole (ST203M-K35). Pick K when a motor or transformer load keeps popping a C breaker at the same rating.
3) How do I tell if an ABB ST201M is 1-pole or 3-pole from the part number?
Read the digit after ST20. ST201M is the 1-pole device, as in ST201M-C10 and ST201M-K8. ST203M is the 3-pole device, as in ST203M-K35. The letter and number after the dash give the trip curve and the amp rating, so ST203M-K35 is a 3-pole, K-curve, 35 amp breaker. Order the pole count to match the circuit, not the panel space you have open.
4) I need overcurrent protection for a feeder, not a control circuit. Is the ST200M the wrong part?
The ABB ST200M is a miniature circuit breaker for supplementary protection under UL1077, sized in the single-digit to 35 ampere range across configurations such as the ST203M-K35. For feeder and larger distribution duty, Square D offers the PowerPacT B as a thermal magnetic circuit breaker and the PowerPacT Q as an I-Line circuit breaker, both molded case families rather than DIN rail miniature devices. Choose by where the device sits in the distribution hierarchy.
5) What should a panel builder use the ABB ST200M breaker for?
It is aimed at control panel and panelboard wiring, OEM equipment protection, and supplementary protection on branch circuits inside commercial and industrial gear. Typical uses are protecting control transformers, small motors, instrumentation and power supplies inside an enclosure. Facility maintenance teams also stock them for breaker replacement programs since each one ships individually.
6) What is the closest equivalent to the ABB ST201M-C6 from another manufacturer?
For a single-pole C-curve miniature breaker, the Square D Multi9 C60 is offered as a 1-pole C-curve miniature circuit breaker rated 120V AC. The ABB ST201M-C6 is a 6 ampere C-curve single-pole device in the ST200M series built to UL1077. Confirm the amperage you need and the standard your panel schedule calls out, since the two families are written to different listings.
7) Is the Square D PowerPacT Q a drop-in substitute for an ABB ST201M in a control panel?
No. The PowerPacT Q is an I-Line circuit breaker, a molded case device designed to plug onto I-Line bussing in a panelboard, while the ABB ST200M is a miniature circuit breaker in the ST200M series intended for supplementary protection to UL1077. They do not share a mounting method or a listing, so one cannot take the other's place in a control panel enclosure.
8) Does an ABB ST201M come in a multi-pack or single?
Each ST200M breaker is supplied individually, one each. There is no strip pack, so order quantity equals the number of poles' worth of devices you need, and a 3-pole job is covered by a single ST203M rather than three singles tied together.
How fast can I get the ABB ST201M-K4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ABB ST201M-K4 come with a warranty?
Absolutely. The ABB ST201M-K4 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ABB ST201M-K4?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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