Low-voltage battery protection 12/24V 40A

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Samlex

SB100

Low-voltage battery protection 12/24V 40A

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Retail priceBenefit from the professional rate

£65.04 GBP

£65.04 GBP ~~£75.23 GBP~~

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Low stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Protection contre les surtensions batterie	Oui
Protection contre les sous-tensions batterie	Oui
Détection automatique de la tension batterie	Oui
IP rating	IP66
Material	Polyuréthane caoutchouté
Max Continuous Current	40
Operating voltage	12/24
Over Voltage Protection Threshold 12v	16
Peak Current	300
Peak Current Duration	0.7

Detailed description

Designed for protecting embedded power systems, the Samlex SB100 low-voltage battery protection 12/24V 40A is an intelligent and programmable disconnect device. This module prevents excessive discharge of 12V or 24V batteries and protects connected electronic devices from overvoltage, ensuring the longevity of the entire system.

Technical specifications and performance

The Samlex SB100 is distinguished by its ability to handle a maximum continuous load of 40 amperes, with peak currents supporting up to 300 amperes for 0.7 seconds or 45 amperes in transient load. It features automatic voltage detection for the system (12V or 24V) and offers an input/output voltage range of 6 to 35 VDC. Its current consumption is 3.2 mA, comparable to other products in the series such as the BG-200, minimizing impact on the battery. Overvoltage protection is provided by a cut-off at 16 VDC. Its rubberized polyurethane housing is IP66 certified, ensuring protection against dust and powerful water jets, making it suitable for marine and mobile environments.

Advanced features and integration

The SB100 offers 10 user-selectable on/off voltage threshold programs via jumpers, allowing precise adaptation to the specific needs of each installation. It includes a remote OFF control input to disconnect the battery via an external switch, as well as an alarm/status indicator output to signal an imminent low-voltage threshold or other conditions. Built-in protections against overcurrent and overheating automatically disconnect loads in the event of a critical event. Compared to lower-capacity solutions such as the Samlex SB090 (20A) or higher-capacity ones like the SJ169 (250A), the SB100 provides a balance for applications requiring automatic and reliable management of medium loads up to 40A. It is designed for marine, automotive, recreational vehicles (RV), and standalone systems.

Documentation

Type	Nom
	EN - Technical Datasheet
	manual-battery-controllers-bg_pdf.pdf

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis: Samlex SB100 smart battery protection »

The Samlex SB100 is a technically sound solution for managing 12V and 24V systems on board. Its main advantage lies in the proactive protection of batteries against deep discharges—a major factor in reducing their lifespan—and safeguarding sensitive electronic equipment from voltage spikes, such as those that can occur during an alternator failure. Unlike a simple fuse or circuit breaker, the SB100 features intelligent disconnect logic based on programmable voltage thresholds (10 options), allowing precise adaptation to battery technology or usage profile. Its IP66 rating makes it suitable for installation in technical compartments where humidity may be present, though direct protection against intense spray remains preferable. It is particularly well-suited for recreational boats, leisure vehicles, or standalone installations where constant manual monitoring is impractical. Note that for continuous loads exceeding 40A, higher-capacity models such as the same brand’s SJ169 (250A) or parallel use of multiple units for segmented loads will be required.

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Low-voltage battery protection 12/24V 40A

£65.04 GBP

£65.04 GBP ~~£75.23 GBP~~

Frequently Asked Questions

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What is the purpose of the Samlex SB100 battery protector?

The Samlex SB100 battery protector is an intelligent device designed to prevent excessive discharge of 12V or 24V batteries. It also protects connected electronic devices from overvoltage, helping to extend the lifespan of the entire onboard power system.

Is the Samlex SB100 compatible with 12V and 24V systems?

Yes, the Samlex SB100 features automatic system voltage detection, allowing it to operate with either 12V or 24V batteries.

What is the maximum continuous current that the Samlex SB100 can handle?

The Samlex SB100 can handle a continuous load of up to 40 amps.

What is the peak current capacity supported by the SB100?

The SB100 can handle current spikes up to 300 amperes for 0.7 seconds.

Does the Samlex SB100 provide surge protection?

Yes, the Samlex SB100 includes overvoltage protection that disconnects the load at 16 VDC.

What is the current draw of the Samlex SB100?

The Samlex SB100 draws 3.2 mA, minimizing its impact on the battery.

Can I install the Samlex SB100 in a marine environment?

Yes, the Samlex SB100 housing is made of rubberized polyurethane and is IP66 certified. This certification ensures protection against dust and powerful water jets, making it suitable for marine and mobile environments.

How can I configure the on/off voltage thresholds on the SB100?

The SB100 offers 10 on/off voltage threshold programs. These programs are user-selectable via jumpers, allowing precise adaptation to the specific requirements of each installation.

Is it possible to remotely disconnect the battery with the SB100?

Yes, the SB100 has a remote OFF command input. This allows the battery to be disconnected via an external switch.

Does the Samlex SB100 indicate low-voltage conditions?

Yes, the SB100 is equipped with an alarm/status output. This output can signal an imminent low-voltage threshold or other system conditions.

What built-in protections does the Samlex SB100 have?

The Samlex SB100 includes overcurrent and overheating protections. In the event of a critical issue, these protections automatically disconnect the loads.

What is the input and output voltage range of the Samlex SB100?

The Samlex SB100 input and output voltage range is 6 to 35 VDC.

Can the SB100 be used with different types of batteries?

The Samlex SB100 is designed to protect onboard power systems and is compatible with 12V or 24V batteries. The specific battery type (starting, service, etc.) is not specified as a limitation, but it is intended for protection against excessive discharge.

What does the IP66 certification mean for the SB100 housing?

The IP66 certification means that the SB100 housing is fully protected against dust and powerful water jets from all directions. This ensures its robustness in demanding environments.

How does the SB100 protect electronic devices?

The SB100 protects connected electronic devices by preventing excessive battery discharge and disconnecting them in case of overvoltage (cut-off at 16 VDC), ensuring their safety and longevity.

Is the SB100 an automatic disconnection device?

Yes, the Samlex SB100 is a smart, programmable disconnect device. It automatically disconnects the load when the battery voltage drops below a preset threshold or in case of overvoltage, overcurrent, or overheating.

How does the SB100 detect system voltage (12V or 24V)?

The Samlex SB100 integrates an automatic voltage detection function, allowing it to adapt without manual intervention to either a 12V or 24V system.

What are the advantages of using a battery protection device like the SB100?

Using the SB100 prevents excessive battery discharge, protects electronic devices from voltage spikes, and ensures the longevity of the entire power system. It also offers configuration flexibility with its voltage threshold programs and built-in protections.

Does the SB100 require complex configuration during installation?

The SB100 offers 10 user-selectable on/off voltage threshold programs via jumpers, allowing for tailored configuration without being overly complex. Voltage detection for 12V/24V is automatic.