1 of 5

Shock Block GFCI

SB5000 Series

Littelfuse.com/SB5000

Speciﬁcations are subject to change without notice.

Revised: 05/01/2023

Description

Special-Purpose Ground-Fault Circuit Interrupter (SPGFCI), Class C and Class D

The Industrial Shock Block

SB5000 series is a personnel protection device designed to meet the requirements for special-

purpose GFCIs defined by UL 943C. This standard outlines GFCI classes specifically designed for use in industrial facilities.

Class C GFCIs are intended to be used on three-phase systems where the line-to-line voltage is 480 V or less with a trip

level of 20 mA, while Class D GFCIs are intended to be used on 600 V systems. The Industrial Shock Block includes DFT

harmonic filtering, an automatic self-test feature, and is compliant to the UL 1998 Software in Programmable Components

standard.

Ground-Fault Circuit Interrupter (GFCI), Class A

The Shock Block is available as a 208 V Class A GFCI, allowing commercial kitchens, construction sites, and other non-

dwelling units with wet areas to meet NEC 210.8(B) for their three-phase loads up to 100 A.

Equipment Ground-Fault Protective Device (EGFPD)

Industrial Shock Block is also available with adjustable protection settings as an EGFPD. The EGFPD models can be set to

trip at 6 mA or from 10–100 mA in increments of 10 mA. This offers more flexibility since GFCI devices are not allowed to

have an adjustable trip level.

Ratings and Models

Industrial Shock Block (GFCI & EGFPD) is available for three-phase voltages from 208 to 600 V with a maximum full load

current up to 100 A. The power system can be either solidly or high-resistance grounded, and the load must be three-phase

without a neutral. The standard enclosure is IP 69K/NEMA 4X and outdoor rated, suitable for all industrial environments

including high temperature washdown used in food production.

Ground Wire (Load-Ground) Monitor

The Industrial Shock Block also monitors the ground wire (load-ground) connection between the Industrial Shock Block and

load. This is a required feature for Class C and D GFCI devices and is recommended for Class A GFCI and EGFPD devices.

If the ground-return path is broken, the Industrial Shock Block will trip and provide an alarm by changing the state of the

alarm contacts. This monitoring circuit includes an extra wire (pilot wire) between the Industrial Shock Block and load. At

the load, the pilot wire is connected to a termination device. The other end of the termination device is connected to the

load ground (typically the enclosure).

Industrial Shock Block for Personnel Protection

*For 32 A and 60 A only

2 of 5

Shock Block GFCI

SB5000 Series

Littelfuse.com/SB5000

Speciﬁcations are subject to change without notice.

Revised: 05/01/2023

Features & Beneﬁts

FEATURES BENEFITS

UL 943 inverse time trip curve

Inverse time detection circuit protects people while also reducing the

probability of nuisance tripping

DFT (Discrete Fourier Transform) filtering algorithm Eliminates nuisance trips due to harmonics

Minimum trip time <20 msec Reduces the risk of ventricular fibrillation for leakage current of 250 mA and above

Fixed 6 mA (UL 943) or 20 mA (UL 943C) trip level

UL Listed GFCI and Special-Purpose GFCI personnel protection for industrial

and commercial loads up to 100 A (GFCI versions)

Selectable trip levels 6–100 mA

Settings below 20 mA provide extra safety. The settings above 20 mA can

reduce nuisance tripping on systems with high-leakage current (EGFPD versions)

Two-stage ground monitor with Zener termination

that meets UL 943C, CSA M421

Proactively protects from shock by tripping if continuity of ground wire

between Industrial Shock Block and load is broken

Flexible configuration

Selectable manual reset or auto-reset for brownout, power-up, and ground

monitor interruptions to fit plant safety protocols

Conformal coating Internal PWB is conformally coated to protect against corrosion and moisture

Auxiliary contact Alerts your SCADA system if the Shock Block is energized or tripped

Automatic self-test The Shock Block will continuously test itself and will trip if there is an internal failure

GFCI Class A, C, D, and EGFPD options in one series Simplified planning and operator familiarity for multiple applications/requirements

Applications

• For applications where people,

electrical equipment, and water

are present

• Agriculture

• Amusement parks

• Commercial kitchens

• Construction

• Food and beverage

• Horticultural lighting

• Maintenance shops

• Manufacturing

• Mining

• Oil and gas

• Swimming pools

• Vehicle service centers

• Wastewater facilities

Speciﬁcations

Voltage Rating 208 V, 480 V, 600 V

Current Rating 32, 60, 80, or 100 A

System Type Three-phase, 3-wire (no neutral), 60 Hz; Single-phase, 2-wire (no neutral), 60 Hz;

Single-phase, 3-wire (with neutral), 60 Hz for EGFPD versions only

Short-Circuit Current Rating 10,000 A (for SB5032 and SB5060); 50,000A (for SB5080 and SB5100)

Trip Level Settings Fixed at 6 mA (Class A models); Fixed at 20 mA (Class C/D models)

Selectable 6, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 mA (EGFPD models)

Trip Time Setting Inverse time curve according to UL 943

Ground Monitoring Circuit Selectable short or Zener termination; Fail-safe; CSA M421 compliant

Enclosure IP 69K and NEMA 4X (Outdoor), Polycarbonate, Lockable

Operating Temperature -35 °C (-31 °F) to 40 °C (104 °F), up to 66 °C (151 °F) with derating

Dimensions H 285.6 mm (11.25 in.); W 244.4 mm (9.62 in.); D 119.6 mm (4.71 in.) – for 32 A and 60 A

H 383.4 mm (15.09 in.); W 327.1 mm (12.88 in.); D 137.4 mm (5.5 in.) – for 80 A and 100 A

Accessories

1N5339B Termination Device: Axial-lead ground-check termination, included with SB5000 series

SE-TA6 Termination Assembly: Optional termination assembly with terminals and mounting holes

SE-TA6-SM Stud-Mount Termination Assembly: Optional ground-check termination for submersible pumps

SE-TA6ASF-WL Series Termination Assembly: Compact 12 W ground-check termination assembly