5SJ4114-7HG42

What type of electrical device is this?

It is a SENTRON 5SJ4 miniature circuit breaker designed to protect electrical circuits against overloads and short circuits.

What is the rated current?

The breaker has a rated current of 0.3 A at 40°C, making it suitable for low-current control, instrumentation and industrial circuits.

How many poles does the breaker have?

It is a single-pole, or 1P, miniature circuit breaker.

What tripping characteristic does it use?

The 5SJ4114-7HG42 uses a Type C tripping characteristic, which accommodates moderate inrush currents while providing overload and short-circuit protection.

Can it be used with both AC and DC circuits?

Yes. The breaker is designed for AC and DC applications, subject to the specified operating-voltage limits for each circuit arrangement.

What is the maximum operating voltage?

The maximum operating voltage is 277 V AC under UL 489 and CSA requirements. For DC operation, the maximum is 60 V in a single-channel arrangement or 125 V in a two-channel arrangement.

What is its short-circuit breaking capacity?

The rated breaking capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2. The applicable figure depends on the installation standard.

How is the breaker mounted?

It mounts onto a standard rail and can be installed in any mounting position.

How much panel space does it require?

The breaker occupies one modular width unit. It is approximately 18 mm wide, 121 mm high and 70 to 76 mm deep, depending on the dimensional reference used.

What conductor sizes can be connected?

The combined terminals accept finely stranded conductors with end preparation from 0.75 mm² up to 25 mm².

What terminal tightening torque is required?

The specified maximum tightening torque for copper conductors rated at 60°C or 75°C is 3.5 N·m, equivalent to 31 lb-in.

What level of ingress protection does it provide?

With conductors connected, the breaker has an IP20 protection rating. The operating-handle area is rated IP40.

What ambient temperatures can it operate in?

The specified operating-temperature range is -25°C to 55°C. Its rated current is derated at higher temperatures, reaching approximately 0.26 A at 55°C.

What is the rated insulation voltage?

The rated AC insulation voltage is 440 V. The device is classified for overvoltage category III and pollution degree 3.

How much power does it dissipate?

Power loss is approximately 1.2 W per pole at the rated current under warm operating conditions.

Does it provide touch protection?

Yes. The design incorporates touch protection and combined terminals at both the top and bottom.

Can supplementary devices be fitted?

Yes. The 5SJ4114-7HG42 is designed to accept compatible supplementary devices for suitable panel configurations.

Is the breaker suitable for industrial machinery?

Yes. Its compact rail-mounted design, Type C response and AC/DC capability make it suitable for mechanical engineering, industrial control panels and low-current equipment circuits.