1 of 6

Littelfuse.com/SB5000

Speciﬁcations are subject to change without notice.

Revised: 04/16/2024

Shock Block - GFCI / SPGFCI / EGFPD

SB5000 Series

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 SB5000 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 SB5000 is available as a 208 or 240 V Class A GFCI, allowing commercial kitchens, vehicle service centers, and other

non-dwelling applications to meet NEC 210.8(B) for their three-phase loads up to 100 A.

Equipment Ground-Fault Protective Device (EGFPD)

The SB5000 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 and SPGFCI devices are not

permitted to have an adjustable trip level.

Ratings and Models

The SB5000 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 single-phase or three-phase as

long as the load does not require 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 applications. The 32 and 60A models

are also available in a hygienic stainless steel enclosure, with a 10 degree sloped top and FDA compliant silicone gasket,

designed to facilitate sanitation in food processing facilities and the like.

Grounding Monitor / Interrupter (GMI)

The SB5000 also monitors the equipment grounding connection between the 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 SB5000 will trip and provide an alarm by changing the state of the alarm contacts. This monitoring circuit

requires an extra (pilot) wire between the SB5000 and the load. At the load, the pilot wire is connected to a termination

device. The other end of the termination device is connected to the equipment ground (typically the enclosure).

Industrial Shock Block for Personnel Protection

*For Polycarbonate 32 A and 60 A only

2 of 6

Littelfuse.com/SB5000

Speciﬁcations are subject to change without notice.

Revised: 04/16/2024

Shock Block - GFCI / SPGFCI / EGFPD

SB5000 Series

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 SB5000 and equipment is compromised

Flexible configuration

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

monitor interruptions to fit plant safety protocols

Conformal coating

Equipped with conformally coated circuit boards to protect against corrosion and

moisture

Auxiliary contact Alerts your SCADA system if the SB5000 is energized or tripped

Automatic self-test The SB5000 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

• Pools, spas, fountains, water

features

• Vehicle service centers

• Water/wastewater

Speciﬁcations

Voltage Rating 208 V, 240 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 Polycarbonate: IP 69K and NEMA 4X (Outdoor), Polycarbonate, Lockable

Stainless Steel: IP 69K and NEMA 4X, AISI 304 steel, FDA compliant blue silicone gasket

Stainless Steel: Class II, Division 2, Groups E, F, G for Hazardous Locations and T6 Temperature Code

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 Polycarbonatate 32 A and 60 A

H 358.2 mm (14.10 in.); W 250.5 mm (9.86 in.); D 170 mm (6.69 in.) – for Stainless Steel 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 Polycarbonate 80 A and 100 A