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Littelfuse SB6000 Industrial Shock Block

Where are your company’s electrical safety priorities as we move into 2023? As technology advances, fatalities due to electrical shock have decreased significantly. However, you may not be aware that non-fatal injuries from electrical shock have not seen the same decrease.

Increasing electrical shock safety for your workforce is as simple as understanding the GFCI (Ground-Fault Circuit Interrupter).

The GFCI serves to protect workers from the most common types of electrical faults, but it’s a well-known fact that ground faults result in the most injuries. A ground fault is unintentional contact between a phase conductor and ground or equipment frame, which can often result from human error.

To improve electrical safety in industrial environments, UL 943C was introduced to address the limitations of Class A GFCI’s from the previous UL943. UL943C defines three GFCI classes: Classes C, D, and E. These new classes are rated up to 600V, with a trip level of 20 mA. In addition, UL 943C requires the device to monitor the continuity of the ground wire and interrupt power to the load if ground integrity is lost.

With the addition of UL943C, Littelfuse has hit the ground running with its SB6000 Industrial Shock Block. The SB6000 protects personnel from electrical shock where standard GFCI breakers and receptacles have previously not been available

  • All-in-one solution to detect leakage current and interrupt the circuit for loads up to 100A

  • Short-circuit current rating (SCCR) of 50 kA

  • Monitors continuity of the ground circuit

  • Prolongs life of the internal contactor by offering undervoltage, brownout and chatter detection

  • Available as a Special-Purpose GFCI (fixed 20mA) and equipment ground fault protective device (6, 10-100 mA in increments of 10 mA).

Get your workforce a gift this year by allowing the Littelfuse SB6000 Industrial Shock Block to prevent electrical injuries and create peace of mind.

For more information, please visit the Littelfuse website or contact JFN Sales at

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