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Siemens 5SY41165 1-pole DIN rail breaker grey toggle

SIEMENS

SIEMENS 5SY41165 Supplementary Protector 16 A 230/400 V AC 1 Pole DIN

SKU CH-2D27-3X10Q

Provides 16 A, 1-pole circuit protection at 230/400 V AC with 10 kA interrupting rating and DIN-rail mounting

  • Brand nameSIEMENS
  • Rated 16 A for 230/400 V AC circuits
  • 10 kA interrupting capacity at rated voltage
  • Thermal-magnetic trip protects against overload and short-circuit
  • Single-pole DIN-rail mount fits standard panels
  • Screw-clamp terminals accept 14 to 4 AWG wire

Application and fit

This Siemens 5SY41165 supplementary protector is built for industrial control panels that need single-pole circuit protection on a standard DIN rail. It suits engineers and maintenance teams specifying a 16 A thermal-magnetic breaker for 230/400 V AC systems.

Interface limits

The device mounts on a DIN rail and accepts conductors from 14 AWG up to 4 AWG via screw-clamp terminals. Its interrupting capacity is rated at 10 kA at 230/400 V AC, and it also carries a 72 V DC voltage rating for mixed-voltage panels.

Deciding specification

The defining parameter is the 16 A rated current combined with Curve Type A thermal-magnetic trip behaviour. Buyers who need a different current rating, a different trip curve or multi-pole protection must select another part number.

How it compares

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Price $38.99
Typical for this category: the median of 677 items is $33.99.

Specifications

Product
Brand nameSIEMENS

Questions about this item

Should I pick the 16 A version or a different current rating for my circuit?

Choose the 16 A model when your circuit load is at or below 16 A; the 230/400 V AC rating and 10 kA interrupting capacity cover standard industrial single-phase and three-phase supplies.

What does the 10 kA interrupting rating mean once the protector is installed?

It guarantees the device can safely clear a short-circuit current up to 10 kA at 230/400 V AC without damage, which matches typical industrial panel fault levels.

How does the UL 1077 listing and DIN-rail mounting affect what I can connect?

The UL 1077 supplementary protector rating and DIN-rail mount let you install it inside a compliant enclosure using screw-clamp terminals for 14–4 AWG wire, limited to 72 V DC on the DC side.

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