Siemens 3TC Railway Contactors for DC Voltage, 2-Pole (32-400 A)

3TC 2-pole contactors for switching DC voltage up to 750 V with extended operating range for railway applications, sizes 2 to 12 (32 A to 400 A), with dedicated spare parts.

Key features

Switch DC loads to DC-1 and DC-3/DC-5 up to 750 V
Rated operational current 32 A (size 2) to 400 A (size 12) DC-1
DC solenoid with series resistor and varistor coil circuit
Auxiliary contacts 2 NO + 1 NC (one NC used for series resistor)
Spare arc chute and series-resistor coils for extended-range versions

Specifications

Brand	Siemens
Series	3TC4 / 3TC5
Poles	2
Rated voltage	up to 750 V DC
Aux. contacts	2 NO + 1 NC
Terminals	Screw
Source	Siemens Catalog IC 10 · 2026, p. 4/69

3TC4417-0LB4		Item: Contactor 2-pole \| Size: 2 \| Ie at 750 V: DC-1 32 A / DC-3,5 7.5 A \| Coil: 24 V DC
3TC4417-0LF4		Item: Contactor 2-pole \| Size: 2 \| Ie at 750 V: DC-1 32 A / DC-3,5 7.5 A \| Coil: 110 V DC
3TC4817-0LB4		Item: Contactor 2-pole \| Size: 4 \| Ie at 750 V: DC-1 75 A / DC-3,5 75 A \| Coil: 24 V DC
3TC4817-0LF4		Item: Contactor 2-pole \| Size: 4 \| Ie at 750 V: DC-1 75 A / DC-3,5 75 A \| Coil: 110 V DC
3TC5217-0LB4		Item: Contactor 2-pole \| Size: 8 \| Ie at 750 V: DC-1 170 A / DC-3,5 170 A \| Coil: 24 V DC
3TC5217-0LF4		Item: Contactor 2-pole \| Size: 8 \| Ie at 750 V: DC-1 170 A / DC-3,5 170 A \| Coil: 110 V DC
3TC5617-0LB4		Item: Contactor 2-pole \| Size: 12 \| Ie at 750 V: DC-1 400 A / DC-3,5 400 A \| Coil: 24 V DC
3TC5617-0LF4		Item: Contactor 2-pole \| Size: 12 \| Ie at 750 V: DC-1 400 A / DC-3,5 400 A \| Coil: 110 V DC
3TY2442-0B		Item: Spare arc chute (resistor recess) \| Size: 2 (3TC4417-0L..) \| Ie at 750 V: - \| Coil: -
3TY6443-0LB4		Item: Spare coil, series resistor \| Size: 2 (3TC44) \| Ie at 750 V: - \| Coil: 24 V DC
3TY6443-0LF4		Item: Spare coil, series resistor \| Size: 2 (3TC44) \| Ie at 750 V: - \| Coil: 110 V DC
3TY6483-0LB4		Item: Spare coil, series resistor \| Size: 4 (3TC48) \| Ie at 750 V: - \| Coil: 24 V DC
3TY6483-0LF4		Item: Spare coil, series resistor \| Size: 4 (3TC48) \| Ie at 750 V: - \| Coil: 110 V DC

Magnetic ContactorsSiemens

13 product codes available in this family

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Siemens 3TC Railway Contactors for DC Voltage, 2-Pole (32-400 A)

Brand Siemens·Magnetic Contactors

Available part numbers (13)

3TC4417-0LB4, 3TC4417-0LF4, 3TC4817-0LB4, 3TC4817-0LF4, 3TC5217-0LB4, 3TC5217-0LF4, 3TC5617-0LB4, 3TC5617-0LF4, 3TY2442-0B, 3TY6443-0LB4 + 3 more — see full table ↓

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Siemens 3TC Railway Contactors for DC Voltage, 2-Pole (32-400 A)