COLE HERSEE part description

SureStart Low Voltage Disconnect Switch,150A

No more dead batteries! 150A at 12V DC Ensures ample starting capacity and prolongs battery life. Automatically disconnects non-critical loads from a battery when the battery voltage falls below a predefined threshold. Automatically reconnects the loads to the battery when it is being charged. Manual override permits a user to make or break the connection, regardless of battery voltage. Overcurrent, short-circuit and over-temperature protection. No more stranded vehicles! Avoid the time and expense of getting your vehicles towed. The SureStartTM lvd ensures there’s enough power to start, and saves the batteries on vehicles that aren’t used every day. 6.0"L x 5.1"W x 3.0"H (152.4 x 130.2 x 76.2mm). Environmental: -40degreesC to 85degreesC. SAE J1455 & J1113. Electrical: 200A continuous. Inrush: 500A (for 5 seconds). 2mA max quiescent current. Ignition-proof to iso 8846. Disconnects when battery drops below 12.1V for 2 minutes, reconnects when battery meets or exceeds 13.0V for 10 seconds. Alarm: Active low, 50mA. Activates 1 minute before disconnect. Electronics sealed to ip67.
  • No more dead batteries!
  • 150A at 12V DC
  • Ensures ample starting capacityThe current handling capability or rating of a switch. Alternatively refers to the amount of charge a component (like a capacitor) can hold - measured in Farads. and prolongs batteryA collection of voltaic cells grouped together to provide higher voltage and/or higher current than a single cell. The battery is a common DC power source, especially for vehicles or equipment that is used remote from the domestic power supply.
  • Emergency vehicles and utility vehicles often have dual battery systems because of added power demand. Such systems necessitate the use of a Battery Selector Switch or a Low Voltage Disconnect Switch. life. Automatically disconnects non-critical loads from a battery when the battery voltageElectrical pressure, the force that causes current to flow through a conductor. Voltage must be expressed as a difference of potential between two points since it is a relational term. Connecting both voltmeter leads to the same point will show no voltage present although the voltage between that point and ground may be thousands of volts.
  • Calculations often involve Ohm's Law, q.v. falls below a predefined threshold. Automatically reconnects the loads to the battery when it is being charged.
  • Manual override permits a user to make or break the connection, regardless of battery voltage.
  • Overcurrent, short-circuit and over-temperature protection.
  • No more stranded vehicles! Avoid the time and expense of getting your vehicles towed. The SureStartTM lvdLow Voltage Disconnect Switch.
  • A versatile electronic unit that conserves vehicle starting power by shedding auxiliary loads and reconnecting them when battery is replenished.
  • Some LVDs can be programmed to an array of parameters such as time or voltage levels.
  • Available in different sizes/amperages:
  • 48512 (150A) and 48510 are 6 x 5.25 x 3"
  • 48513 (100A at 12V or 24V DC) is 4.5 x 4.25 x 3"
  • 48510 (10A at 12V or 24V DC) is only 4 x 3 x 1" ensures there’s enough powerElectrical energy measured according to voltage and current (normally watts). Power in watts equals volts times amperes for DC circuits.
  • to start, and saves the batteries on vehicles that aren’t used every day.
  • 6.0"L x 5.1"W x 3.0"H (152.4 x 130.2 x 76.2mm).
  • Environmental: -40degreesC to 85degreesC. SAE J1455 & J1113.
  • Electrical: 200A continuousCertain switches, like solenoids can be rated for continuous or intermittent (infrequent) use. A comparably-constructed switch can generally be used with a higher current than the other switch, but with the proviso that a cooling time is allowed. There are no such restrictions on a 'continuous duty' switch. You can use a Continuous Duty Solenoid instead in place of an Intermittent Duty Solenoid, but it would have a shorter life expectancy compared to the purpose-built Intermittent Duty Solenoid. You cannot use an Intermittent Duty Solenoid in place of a Continuous Duty Solenoid!.
  • Inrush: 500A (for 5 seconds).
  • 2mA max quiescent currentQuiescent current is the current draw of a device when it is turned On and ready to perform, but not actually driving a load. For example, quiescent current on a FlexMod LVD is typically 1mA.
  • Parasitic load is different.
  • Even when some equipment is turned off, there is still a small current draw, sometimes used to maintain the settings (such as time) on electronic equipment. Even though the draw may only be milliamps, the parasitic load adds up where there are multiple devices on a vehicle that is left inactive.
  • Installing an LVD would stop the starting battery from being drawn down to a level where the vehicle cannot be started..
  • Ignition-proof to iso 8846Electromechanical switches inevitably tend to create a spark between the contacts. In normal circumstances this is unlikely to be a problem, but in confined situations where fuel vapors may be present (In boats and in mines for example), ignition-protected switches are necessary. ISO 8846 is a marine standard of the International Organization for Standards. Many Cole Hersee brand ignition switches are cerified to this standard..
  • Disconnects when battery drops below 12.1V for 2 minutes, reconnects when battery meets or exceeds 13.0V for 10 seconds.
  • Alarm: Active low, 50mA. Activates 1 minute before disconnect.
  • Electronics sealed to ip67IP numbers refer to INGRESS PROTECTION of a device against ingfress of dust or liquid. A switch with a rating of IP67 will resist spraying with a high pressure hose. A switch with IP68 is even more resistant. These are the two most useful numbers when you're considering spec'ing a switch. .
Description LVD- Low Voltage Disconnect Switch
Details Saves starting power
UL listed No
Rating 150A at 12V DC
Sealing Sealed to IP67
Dimensions 6.0 x 5.1 x 3.0"H
SI dimensions 152.4 x 130.2 x 76.2mm
Ignition-proof To ISO 8846

Cole Hersee® is highly valued in the heavy duty truck industry. It is a leading manufacturer of heavy-duty battery master switches that are widely used as OE equipment by leading heavy-duty vehicle manufacturers. These switches are essential safety components for trucks as they help prevent theft, tampering, electrical fires, and battery drain. Founded in 1924, Cole Hersee is committed to improving vehicle safety by partnering with ECCO Safety Group Australia (ESGA) to establish and implement safety standards for trucks that drive onto mining sites. Its products are also manufactured in its ISO 9001:2008-certified facility and undergo strict testing to ensure safety and reliability.

Don't know your part number?

Take a photo and we'll identify it!

Recommended Products

More from COLE HERSEE (Browse all)