3LD3330-0TK13

What type of electrical device is this?

This is a Siemens SENTRON 3LD3 switch disconnector designed to provide manual isolation and switching of electrical loads. It has a three-pole configuration and a red/yellow rotary selector knob.

What is the rated operational current?

The switch disconnector has a rated operational current of 40 A.

What is the maximum rated operating voltage?

It is rated for operation at up to 690 V AC across a frequency range of 50 to 60 Hz.

What is its switching capacity at 400 V?

At 400 V, the rated operating capacity is 19 kW for AC-23 A applications and 12 kW for AC-3 applications.

How many poles does the switch have?

The device has three poles, making it suitable for switching and isolating three-phase electrical circuits.

What mounting arrangement does it use?

The 3LD3330-0TK13 is a fixed-mounting unit designed for installation on a DIN rail within a distribution board or electrical enclosure.

What are the dimensions of the unit?

The unit measures approximately 60 mm high, 36 mm wide and 77 mm deep.

How much does the device weigh?

The net weight is approximately 200 g.

Can the switch be locked in the OFF position?

Yes. The selector mechanism can be locked in the zero or OFF position using up to two padlocks with a hasp thickness of 4 to 6 mm.

What positions are shown on the selector knob?

The manual position indicator displays 1 for ON and 0 for OFF, allowing the selected state to be identified clearly.

Does the unit include auxiliary contacts?

No auxiliary contacts are fitted as standard. Optional auxiliary contacts may be attached, with provision for up to two normally closed and four normally open contacts.

What conductor sizes can be connected to the main terminals?

The main box terminals accept one copper conductor with a cross-sectional area from 2.5 to 16 mm². Solid, stranded and suitably terminated finely stranded conductors may be used.

What degree of enclosure protection does it provide?

The specified degree of protection is IP40. The surrounding enclosure and installation method should be selected according to the required environmental protection level.

What ambient temperatures can it operate in?

The specified operating temperature range is -25°C to 55°C.

What is the expected mechanical endurance?

The switch has a typical mechanical endurance of 100,000 operating cycles. Its electrical endurance at AC-23 A and 690 V is specified as 6,000 cycles.

What is the maximum operating frequency?

The maximum operating frequency is 50 switching operations per hour.

What type of short-circuit protection is required?

A 40 A gL/gG fuse is specified for short-circuit protection of the main circuit. Where optional auxiliary contacts are fitted, a 10 A gL/gG fuse is specified for their circuit.

Where is this switch disconnector commonly used?

It is commonly used as a main isolator, maintenance isolator or emergency-off switching device in distribution boards, machinery panels and industrial electrical enclosures.