24V HEAVY DUTY MAKE & BREAK RELAY 70AMP

Heavy duty make and break with . 70A. 4 terminals (2 x 6.3mm and 2 x 9.5mm blades). (B type pin configuration).

These relays have an internal resistor across the coil connections (85 & 86) to reduce the voltage spike across these terminals when the coil is de-energised. This is particularly important if the relay is being controlled by some form of electronic switch (such as a transistor) rather than by a normal mechanical switch, as the voltage spike can damaged sensitive electronics.  Unlike a diode, resistors are less fragile and are not polarity sensitive, although they aren't quite as efficient at reducing voltage spikes.

If a relay is required without resistor use Lucas SRB565

Suitable relay socket 140302 only.