Littelfuse.com/SB5000
© 2022 Littelfuse, Inc.
Rev: 020922
1 of 2
Personnel Protection
Industrial Shock Block
SB5000 Series
Simplified Circuit Diagram
AUXILIARY
CONTACT
K
LOAD
G
TERMINATION
DEVICE
G
L1
L2
L3
SB50 00
GC
A
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 60 A
Selectable trip levels
(EGFPD)
The settings below 20 mA provide extra safety. The
settings above 20 mA can reduce nuisance tripping on
systems with high leakage current
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 autoreset 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
Features & Benefits
Description
Special-Purpose Ground-Fault Circuit Interrupter (SPGFCI),
Class C and Class D
Industrial Shock Block (ISB) 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 60 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 of either 32 or 60 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. A Class
II, Division 2 option is also available for applications where
explosive dust may be present (future option).
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).
Littelfuse.com/SB5000
© 2022 Littelfuse, Inc.
Rev: 020922
2 of 2
Personnel Protection
Industrial Shock Block
Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for
their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.
Specifications
Voltage Rating 208 V, 480 V, 600 V
Current Rating 32 or 60 A (continuous)
System Type Three-phase, 3-wire (no neutral), 60 Hz
Short-Circuit Current Rating 10,000 A extendable to 50,000 A
(see manual)
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 60 °C (151 °F) with derating
Approvals UL Listed Class A GFCI (UL 943)
UL Listed Class C, D SPGFCI (UL 943C)
cULus Listed EGFPD (UL 943/UL 1053)
UL 1998
Dimensions H 11.25" x W 9.56" x D 4.44"
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
Connection Diagram
The SB5000 is installed in-line between incoming power or existing
overcurrent protection device and the load.
ORDERING
NUMBER
LOAD
RATING (A)
VOLTAGE
(V)
TRIP
LEVEL (MA)
UL CLASS
SB5032-00x-0
32
208
20
(Fixed)
UL 943C Class C SPGFCI
SB5032-20x-0 480
SB5032-30x-0 600
UL 943C Class D SPGFCI
SB5032-01x-0 208
6, 10–100 in
increments
of 10
(Selectable)
UL 943/UL 1053 EGFPDSB5032-21x-0 480
SB5032-31x-0 600
SB5032-02x-0 208
6
(Fixed)
UL 943 Class A GFCI
SB5060-00x-0
60
208
20
(Fixed)
UL 943C Class C SPGFCI
SB5060-20x-0 480
SB5060-30x-0 600
UL 943C Class D SPGFCI
SB5060-01x-0 208
6, 10–100 in
increments
of 10
(Selectable)
UL 943/UL 1053 EGFPDSB5060-21x-0 480
SB5060-31x-0 600
SB5060-02x-0 208
6
(Fixed)
UL 943 Class A GFCI
Note: Replace x with 1 for IP 69K/NEMA 4X Enclosure; replace with 2 to add Class II, Division 2 rating
(future option).
Ordering Information
A
Electrical
Panel
SB5060-021-0
208 V, 60 A, Class A GFCI