ABB Stotz S251-NA L20A 1P+N Miniature Circuit Breaker, 20A L Curve, 240VAC, DIN Rail
S 251-NA Breaker Specifications: Amps, Poles & Voltage
Panel Compatibility & Interchange for ABB S 251-NA
| Description | Details |
|---|---|
| Available Quantity | 1 |
| Model | S 251-NA |
| Condition | Used |
| Manufacturer | ABB |
| Asset Number | KSC507 / 44 / 6 / 06 |
| Guarantee or ASIS | 2. WE GUARANTY OUR WORKMANSHIP & OUR WORD ONLY: 14 Day return |
| Inspections - Yellow Tag | 5.3 Used: ASIS |
| Packaging Cost | 1.6 6x10 CH $3.00 |
$9.95
Basic Information
Asset #
KSC507 / 44 / 6 / 06
Available Quantity
1
Inspections - Yellow Tag
5.3 Used: ASIS
Condition
Used
Guarantee or ASIS
2. WE GUARANTY OUR WORKMANSHIP & OUR WORD ONLY: 14 Day return
Item Description
ABB Stotz S 251-NA miniature circuit breaker, 20 amps, L tripping characteristic, one protected pole with a switched neutral. It comes from ABB's Stotz-Kontakt range, the German maker of DIN rail breakers that became ABB System pro M, and carries both the ABB and STOTZ SK marks.
The NA suffix means the neutral is switched together with the protected phase: the two handles are tied so that tripping or switching off opens both the line and the neutral. The L characteristic is the older German line-protection curve used for cable protection before the B and C curves replaced it, so this breaker matches existing panels built to that standard.
The front is rated 240V AC with a 6000A breaking capacity in energy limiting class 3, and the side label gives 10000A per IEC 157-1 and a 440V maximum. It clips onto 35mm DIN rail alongside other modular devices in control panels, machinery and distribution boards.
Available from King Surplus inventory in Del Rio, Texas.
Factory Information
- Manufacturer: ABB Stotz-Kontakt (ABB and STOTZ SK marks on the breaker)
- Type: S 251-NA miniature circuit breaker
- Poles: 1 protected pole plus switched neutral (terminals 1-2 and 3N-4N, two handles tied together)
- Rated Current: 20A
- Tripping Characteristic: L
- Rated Voltage (front): 240V AC
- Maximum Operating Voltage (side): 440V AC
- Rated Breaking Capacity (front): 6000A, energy limiting class 3
- Rated Short-Circuit Capacity (side): Icn 10000A per IEC 157-1 / P-1
- Mounting: DIN rail, System pro M modular width per pole
- Marking: Nr. 29
- FLAG for review: the title reads 1-Pole; the breaker is 1 pole plus switched neutral (S 251-NA), two module widths
- Spec Basis: ratings printed on the front and side of the breaker, read directly from KSC record 18372 gallery photos 2026-09-16; ABB System pro M miniature circuit breaker technical catalogue (library.e.abb.com) for the S250 family context.
Specifications
ABB
S 251-NA
N/A
N/A
N/A
20
4
3
2
1
2
3
KSC507 / 44 / 6 / 06
Packaging fees
1.6 6x10 CH $3.00
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