Description
The Cole Hersee 75904 is a double-pole, single-throw (DPST) battery and field master switch that disconnects both the battery and the alternator or generator field circuit. It is offered in two versions: a lever-operated switch and a key start switch.
Silver contacts carry 125A continuously and 1000A intermittently, with field terminals rated 20A continuous, across 6V to 36V systems. The operating shaft is O-ring sealed for weather resistance, and the key start version adds an indexing pin to stop the switch rotating in the panel.
Two 3/8″-24 battery studs and two 10-32 field studs are provided, and the 3/4″-24 mounting stem suits panels up to 6.5mm thick. At 91mm high, the 75904 is a compact choice where panel depth is limited.
Key Benefits
- Isolates battery and alternator/generator field together
- Choice of lever or key start operation
- Silver contacts rated 125A continuous, 1000A intermittent
- Weather resistant, O-ring sealed shaft
- Compact 91mm body height
- Suits 6V to 36V systems
Specifications
- Part numbers – 75904B, 75904BX, 75904-03B, 75904-03BX
- Versions – Lever switch (75904); key start switch (75904-03)
- Circuitry – DPST, On/Off, battery and field master
- Voltage – 6V–36V multivoltage
- Amperage – 1000A intermittent, 125A continuous; field 20A continuous
- Contacts – Silver
- Battery studs – 2 × 3/8″-24
- Field studs – 2 × 10-32
- Terminal stud material – Brass
- Maximum terminal torque – 8–10 Nm
- Mounting stem – 3/4″-24 thread, 13mm long
- Panel thickness – Up to 6.5mm
- Anti-rotation pin – Key start version only
- Lockout/tagout – With 24505 lockout kit
- Ingress protection – IP55
- Operating temperature – −40°C to +85°C
- Dimensions – H 91 × Ø 67 mm
- Application – Heavy duty, mining
Applications
- Mining and quarry vehicles
- Trucks and heavy vehicles
- Agricultural and construction equipment
- Key start isolation on plant and machinery
