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Siemens 5SJ4 series 6A single-pole DIN rail miniature circuit breaker, light grey plastic housing, screw-clamp terminals

SIEMENS

SIEMENS 5SJ41066HG40 6A 1 Pole B Curve DIN Rail MCB

SKU CH-4XA0-V0ZW8

Protects single-phase branch circuits at 6 A with a B-curve thermal-magnetic trip and 14 kA interrupting rating at 240 V AC

  • 6 A branch-circuit protection with B-curve thermal-magnetic trip
  • 14 kA interrupting capacity at 240 V AC for industrial panels
  • UL 489 listed for code-compliant installations
  • Screw-clamp terminals accept 14 AWG to 4 AWG conductors
  • Compact 3.54 in × .71 in DIN-rail mount saves panel space

IEC 6 A branch protection

The SIEMENS 5SJ41066HG40 is a 1 pole miniature circuit breaker rated at 6 A for branch circuit protection in industrial panels. It carries a B curve thermal magnetic trip and mounts on standard DIN rail for quick installation.

Screw clamp terminals for 14 to 4 AWG

Terminals accept solid or stranded conductors from 14 AWG up to 4 AWG using screw clamp connections. The 14 kA interrupting rating at 240 V AC and 60 V DC rating suit reverse feed applications where upstream protection is required.

UL 489 listed 63 A frame device

The breaker meets UL 489 and is built on a 63 A frame in the 5SJ4 series. It is not suited for loads that demand a higher ampere rating or a different trip curve characteristic.

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Price $60.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Brand nameSIEMENS

Questions about this item

What is the maximum interrupting rating of this 6 A B-curve breaker at 240 V AC?

The breaker interrupts up to 14 kA at 240 V AC, which is the maximum short-circuit current it can safely clear on a branch circuit.

What DIN rail width and wire sizes does the 5SJ4 frame accept?

It fits standard DIN rail, takes one module space, and the screw-clamp terminals accept 14 AWG to 4 AWG copper conductors.

How do you mount and wire the 5SJ41066HG40 without tripping it during installation?

Snap the breaker onto the DIN rail until the latch clicks, then tighten the screw-clamp terminals to the specified torque; the common mistake is leaving the terminal screws loose, which causes nuisance tripping.

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