Voltcraft SDC-2412-12 Synchronised 166 W DC voltage converter 24 Vdc to 13.8 Vdc SDC 2412-12 Hoja De Datos

This voltage converter produces an output voltage of 13.8 V DC from its own 24 V DC 

voltage source. The maximum nominal current consumption of the connected power supply 

must not be exceeded. Using the new switching power supply technology, you can achieve 

high efficiency with a reduced size and weight. The converter is equipped with reverse 

polarity protection, power surge protection and short circuit protection. Furthermore, it is 

also protected against dust and vibrations and is therefore ideally suited for use in off-road 

vehicles. An operating switch is not necessary due to the low standby current consumption. 

The voltage converter is e-approved and can only be used in motor vehicles (German 

Road Traffic Licensing Regulation – StVZO). Operating it with an alternating voltage is 

not permitted. Operation of this DC voltage converter outdoors or in damp locations is not 

permitted. 
For safety and approval purposes, you must not rebuild and/or modify this product. If you use 

the product for purposes other than those described above, the product may be damaged. 

In addition, improper use can cause hazards such as short circuiting, fire, electric shock etc. 

Read the instructions carefully and keep them. Make this product available to third parties 

only together with its operating instructions.
This product complies with the statutory national and European requirements. All company 

names and product names are trademarks of their respective owners. All rights reserved.

•  DC/DC Converter
•  Clamp mounting with mounting screws
•  4 cable lugs
•  Operating instructions

warranty/guarantee.
a) Persons / Product
•  The device is not a toy. Keep it out of the reach of children and pets.
•  Do not leave packaging material lying around carelessly. These may become 

dangerous playing material for children.

•  Protect the product from extreme temperatures, direct sunlight, strong jolts, high 

humidity, moisture, flammable gases, vapours and solvents.

•  Do not place the product under any mechanical stress.
•  If it is no longer possible to operate the product safely, take it out of operation and 

protect it from any accidental use. Safe operation can no longer be guaranteed if 

the product:

 - is visibly damaged, 
 - is no longer working properly, 
 - has been stored for extended periods in poor ambient conditions or 
 - has been subjected to any serious transport-related stresses.

•  Please handle the product carefully. Jolts, impacts or a fall even from a low height 

can damage the product.

•  Also observe the safety and operating instructions of any other devices which are 

connected to the product.

•  Damages caused by non-compliance with these operating instructions will result 

in termination of the warranty! We will not assume liability for any consequential 

damages resulting thereof!

•  We will not assume liability for property damages or personal injury caused as a 

result of improper usage or non-compliance with the safety instructions!  In any 

such cases, any claims under the warranty will be terminated.

•  Ensure that you use the converter properly. To do this, pay close attention to 

these operating instructions.

•  Do not pour any liquids on top of this converter. There is a danger that it could 

become damaged.

•  Do not use the voltage converter to power medical equipment.
•  Do not connect any voltage supply sources to the output of the voltage converter.
•  The wiring and the voltage converter itself should not be installed near any safety 

systems, such as air bags, seat belt tighteners, ABS, etc.

•  Ensure for sufficient ventilation. This converter is cooled by convection. The 

housing can reach temperatures up to 60 °C; therefore keep it at a safe distance 

from heat-sensitive objects.

•  In industrial environments, the accident prevention regulations of the Employers’ 

Liability Insurance Association for electrical installations and equipment must be 

followed.

b) Miscellaneous
•  Consult an expert when in doubt about operation, safety or connection of the device.
•  Maintenance, modifications and repairs are to be performed exclusively by an 

expert or at a qualified shop.

If you are not sure about the correct connection or use, or if questions arise which are not 

covered by these operating instructions, please do not hesitate to contact our technical 

support or another qualified specialist.
Voltcraft®, Lindenweg 15, D-92242 Hirschau, Tel. +49 180/586 582 7.

1  Green power indicator light (lights up during correct operation)
2  Red error indicator (lights up when the protection scheme is activated and the output is 

turned off)

3  Contacts for the input voltage (24 V)
4  Contacts for the output voltage (13.8 V)

The voltage converter can be easily mounted using the supplied clamp mounting.
Look for a suitable installation location. This should have a solid, heat-resistant underground. 

It should also be protected from splashing water.
Screw the clamp mounting on tightly using the supplied screws.

Secure the voltage converter to the clamp mounting

The 24 V input (INPUT) is safeguarded with an internal glass fuse. An additional fuse is not 

necessary.

To install this voltage converter, only use wires with a minimum cross section of 0.75 mm² 

(AWG 18).
Crimp the supplied cable lugs onto the connection cable. Use colour-coded wires so as not to 

confuse the polarities (red = + / black = - ).

Attach the connection cable to the corresponding contacts.
INPUT +   Positive pole of the DC input voltage, 18 V to 38 V (+)
INPUT –   Negative pole of the DC input voltage, 18 V to 38 V (-)
OUTPUT +  Positive pole of the DC output voltage, 13.8 V (+) for the power supply.
OUTPUT –  Negative pole of the DC output voltage, 13.8 V (-) for the power supply.

Connect the wires on the “INPUT“ terminal to the 24 V voltage source, paying close attention 

to the correct polarities. 
If connected properly, then the green power indicator light (1) goes on.