Item number: 3098
EAN: 4250497819371

Isolation relay WT662

Das Relais wird zwischen zwei Batterien verbaut. Sobald die Zündung am Fahrzeug an ist, schaltet dieses die Zusatzbatterie zur Stromversorgung zu. Dadurch ist es auch für längere Standzeiten des Fahrzeuges ideal, denn durch das Relais kann die Hauptbatterie nicht entladen werden. Im Winter bringt dies zusätzlich Vorteile, da man mit zwei Batterien mehr Kaltstartstromstärke zur Verfügung hat.
Endlich Schluß mit dem Thema "Mein Fahrzeug springt nicht an!".

Category: Solar accessories

Choose tax zone / country of delivery

starting from 13,99 €

including 19% VAT.

Available now!
There are variations of this item. Please select the variation you wish.
Isolation relay WT662
12 V / 120 A
12 V / 200 A


For the use of a secondary battery in a vehicle it is recommended to install an isolation relay. The installation of this relay ensures that the connection between the batteries is cut-off as long as the engine is turned off. Only if the engine is ignited, the secondary battery is connected. Especially if the vehicle is not used for a longer period, this system avoids mutual discharging of the batteries. As soon as the engine is running, both batteries get charged by the alternator.


  •     CarHifi
  •     Boats
  •     Caravan and Camping
  •     Solar systems
  •     etc.

Technical Data

-  NO relay with screw terminals and strap
- high shock resistance
- low contact losses
- protection class IP53
- Pinning S1
- type A

Relay data:
- 12 V (max. 15 V)
- Constant load: 120 / 200 A
- Peak load: 140 A / 600 A (max. 3 seconds)

Relay contacts:
- width 6.35 mm
- length 10.25 mm

Relay screw terminals:
- M6 threads
- Thred length 11 mm

Relay dimensions:
- without contacts 46 x 46 x 45 mm
- with straps 46 x 46 x 62,5 mm

Relay specification

Type: electro magnetic relay
Part: WT662-12VDC-A-120A / 200A
Contact arrangement: A 4-pole
Contact material: Ag alloy

Contact specification:
Switching power: 120A or 200A 14 Vd.c.
Max. contact NO: 120A / 200A
Max. contact voltage: 75 Vd.c.
Min. operation voltage: 6 Vd.c. 1 A

Performance specification:
Contact resistance: 30 mO  max. (bei 6 Vd.c. 1A)
Attraction time: = 10 ms
Cut-off time: = 5 ms

Dielectric strength:
(1) between contacts: 2000 Va.c. (50/60 Hz 1 min)
(2) between coil and contact: 2000 Va.c. (50/60 Hz 1 min)

Isolation resistance:
(1) between contacts: 100MO (500 Va.c.)
(2) between coil and contact: 100 M (500 Va.c.)

Operation in vibrating environment:
10mm, 5 Hz ~ 22,5 Hz.
stability 10mm DA, frequency 5 Hz to 22,5 Hz.

Operation requirements:
Temperature: -40°  ~ 85°
Humidity: 35% ~ 85%

Storage requirements:
Temperature: 0°  ~ 40°
Humidity: 20% ~ 80%

Isolation Relais: Neuer Wert
Other customers have also bought the following items
Fast Delivery

Order will be processed immediately.

Pick up from warehouse

Self pick up your goods


High quality and attractively priced


Protection and Customer Service