This product can be severed as main switch, automotive start relay and Ba-tte-ry isolator. Put this relay between Ba-tte-ries as an isolator or in the main power.

Features:
Red copper binding post: ensuring heavy current can be transited safely.
High current automotive relay and Ba-tte-ry isolator.
12V 500A heavy current relay: great for construction and machinery system.
High quality: ensuring the maximum electric current can be transferred.
Easy and effortless to use: simple installation.

Specifications:
Contact load: 500A
Contact form: 1A
Rated power: 12V
Max switching voltage: 14V
Mechanical life: 10,000,000
Load material: AgSnO
Max switching current: 500A
Pin number: 4 pin
Contact type: SPST
Temperature:-30?Cto+80?C
Humidity: 40-85%
Item size: 8.5 * 5.5 * 7.7cm / 3.3 * 2.1 * 3in (L * W * H)
Item weight: 239g / 8.4oz
Package size: 9 * 8 * 6cm / 3.5 * 3.1 * 2.3in (L * W * H)
Package weight: 252g / 8.8oz