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ABB S803S-K16 — 3-Pole MCB (DIN Rail)

S803S-K16 Circuit Breaker, 16A, 3-Pole, Curve K, 50kA

MPNS803S-K16

ABB S803S-K16, 3-pole miniature circuit breaker, 16 A, Trip Curve K, DIN rail mount, 50 kA interrupting rating at 400/690 VAC.

$146.05Ref. price · indicative, final on quote
ABB S803S-K16 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

S803S-K16 — Identification
ParameterValue
Number of poles3
S803S-K16 — Electrical
ParameterValue
Voltage (AC)230
Current (A)16
S803S-K16 — Protection
ParameterValue
Interrupting rating (AC)50 kA
S803S-K16 — Mechanical
ParameterValue
Mounting typeDIN Rail
S803S-K16 — Other specifications
ParameterValue
TypeTrip Curve K

Product details

Its 50 kA interrupting capacity at 400/690 VAC means it can safely clear high-fault currents on industrial supply lines without upstream device coordination issues — a key spec for panel builders needing selectivity headroom.

What Curve K means for the buyer

Trip Curve K provides a magnetic trip threshold of 8 to 12 times rated current (In), placing it between Curve C (5–10× In) and Curve D (10–20× In).

The 3-pole footprint occupies three module widths (17.5 mm per pole). Rated operational voltage is 400/690 VAC, 375 VDC, at 50/60 Hz. The thermal-magnetic trip mechanism requires no external power supply for protection — it's self-powered from the line side.

Frequently asked questions

Where can I buy S803S-K16 and how do I get a price?

The S803S-K16 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is S803S-K16's listed amps?

The S803S-K16 is rated 16 A continuous current.

What is S803S-K16's listed type?

The S803S-K16 uses Trip Curve K, with a magnetic trip threshold of 8 to 12 times rated current.

Will S803S-K16 drop into a panel specified around S203-D13 without rewiring?

No — the S203-D13 is a 10 A, Curve D, 3-pole breaker with a 10 kA interrupting rating at 277 VAC, while the S803S-K16 is 16 A, Curve K, with a 50 kA interrupting rating at 400/690 VAC. The footprint is similar (3-pole DIN rail), but the current rating, trip curve, and interrupting capacity differ significantly, so a direct drop-in without verifying the load and fault current requirements is not recommended.

MPN
S803S-K16