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White Siemens 5SY41138 DIN-rail breaker with grey toggle switch

SIEMENS

SIEMENS 5SY41138 Circuit Breaker 13A 1 Pole 230/400V AC 10kA

SKU CH-QT9Z-929JW

Single-pole DIN-rail breaker rated 13 A, 230/400 V AC with 10 kA interrupting capacity and thermal-magnetic D-curve trip

  • 13 A rated current protects single-phase circuits
  • 10 kA breaking capacity at 230/400 V AC handles high fault currents
  • D-curve thermal-magnetic trip suits inductive loads
  • DIN-rail mounting with screw-clamp terminals simplifies installation
  • UL 1077 supplementary protector certified for industrial use

Single-pole 13 A DIN-rail breaker

This Siemens 5SY4 series circuit breaker is a single-pole supplementary protector rated 13 A for 230/400 V AC systems. It mounts on a DIN rail and uses a thermal-magnetic trip with a D curve for industrial control circuits. Screw-clamp terminals accept wire from 14 AWG to 4 AWG.

Installers protecting industrial control circuits

It suits electricians and panel builders who need a UL 1077 recognised supplementary protector for single-phase loads up to 13 A. It is not for applications that require a branch-circuit rated breaker under a different UL standard or a multi-pole device for three-phase distribution.

10 kA interrupting rating at 230/400 V AC

The 10 kA maximum AIR at 230/400 V AC is the key figure that determines whether this breaker can safely clear a fault in the intended installation. Verify that the available short-circuit current does not exceed this rating before specifying the part.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $41.99
Cheaper than about 62% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Does the 5SY41138 breaker ship with any mounting hardware or DIN rail clips, or must those be purchased separately?

The breaker uses DIN rail mounting and screw-clamp terminals; mounting clips and wire are not included and must be sourced separately.

Should I choose the 13 A D-curve version or a different rating for a motor circuit with high inrush current?

The D-curve 13 A rating suits loads with high inrush such as motors or transformers; select a lower rating only if the protected cable and load require it.

What does the 10 kA rating mean when the breaker is installed in a 230/400 V AC panel?

It indicates the breaker can safely interrupt up to 10 kA of prospective short-circuit current at 230/400 V AC without damage.

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