Bussmann JM60_ Data Sheet

Technical Data10488

Effective August 2017
SupersedesFebruary 2016

Class J modular ferrule and knifeblade
fuse blocks

Knifeblade fuse blocks from 100 to 600 amps
feature phase barriers between poles for additional
safety with up to four mounting holes per pole
increase installation flexibility. All knifeblade blocks
meet UL creep and clearance requirements for
Industrial Power Circuits (UL 508 and UL 845).

Additionally, the 200 to 600 amp blocks meet the
higher UL creep and clearance requirements for
Power Distribution Standards (UL 98, UL 67, UL
489, UL 891 and UL 869A)

All blocks have optional IP20 finger-safe high
clarity, see-through covers for inspecting wire
terminations or thermography measurements
without removal. All covers enhance safety by
featuring probe holes for easier, safer testing
and a lockout/tagout capability. These covers
also have optional open fuse indication to speed
troubleshooting.

Easy circuit identification is available for 30 and
60 amp blocks and covers with universal marker
labels.

Catalog symbol:

•

JM60_

Description:

Bussmann® series Class J modular fuse blocks
increase versatility, reduce labor and enhance
safety for any panel or electrical system design.
Available for the full Class J fuse amp range.

These fuse blocks feature a standard fuse
clip reinforcing spring for enhanced electrical
contact between the blcok and fuse. All blocks
are available as single-pole versions that snap
together for the required number of poles, or as
factory configured 2-, and 3-pole versions to meet
stocking requirements.

The modular design permits reducing inventory,
assembly time and labor with tool-less assembly
of multiple poles at point of use.

Ferrule fuse blocks up to 60 amps save panel
space with the smallest width dimension on the
market and feature DIN-Rail and panel mount
versatility so that one product can be used for
multiple applications with lower inventory cost.

Specifications:

Ratings

•

Volts 600 V

•

Amps up to 600 A

•

Withstand 200 kA RMS Sym

Agency information

•

Blocks:

®

• UL

Listed E14853 — IZLT and IZLT7

®

• CSA

• CE

• RoHS Compliant

• REACH declaration available upon request

•

Covers:

• UL Listed E58836 - JDVS

• CSA Certified 47235-6225-01 (30 and 60A)

• RoHS Compliant

• REACH declaration available upon request

Certified 47235-6225-01

Technical Data 10488

Class J modular ferrule and knifeblade fuse blocks

Effective August 2017

Poles

•

1-, 2-, 3-pole units factory assembled

•

Single-pole units snap together to create desired number of poles

Flammability ratings

•

Blocks: UL 94V0, self-extinguishing

•

Covers: UL 94HB, self-extinguishing

Operating and storage temperature range

•

Blocks -40°C to +120°C

•

Covers;

• Non-Indicating -40°C to +120°C

• Indicating -20°C to +90°C*

* Indication requires minimum 90V and closed circuit to illuminate.

Materials

•

Base: Thermoplastic

•

Terminals:

• Tin-plated copper brass (30 and 60A)

• Tin-plated aluminum (box lug)

•

Covers: Thermoplastic

Conductors

•

See catalog numbers for details and torque specifications.

Optional see-through covers provide IP20 finger-safe
protection and feature a lockout/tagout provision
to improve electrical safety. These covers are
also available with open fuse indicating
version for faster troubleshooting.
Order separately, one cover per
block pole.

Standard dual lugs on
600A blocks and optional
dual lugs on 400A blocks
for easier wiring using two,
smaller conductors.

Modular Class J ferrule and knifeblade fuse blocks

30 and 60 amp ferrule fuse blocks have DIN-rail and panel mounting capability,
the modular designs allows blocks toand snap together for the desired number
of poles. They accept optional snap-on covers for IP20 finger-safe protection and
feature a lockout/tagout to improve electrical safety.

On blocks rated from 100 to 600A, the optional covers can be completely removed
for servicing or simply hinged open.

100 to 600 amp knifeblade fuse blocks are panel mount with multiple holes for
installation flexibility and the modular design allows blocks to snap together for the
desired number of poles. They accept optional snap-on covers for IP20 finger-safe
protection and feature a lockout/tagout provision to improve electrical safety.

2

Class J modular ferrule and knifeblade fuse blocks

Table 1: 30 and 60 amp block catalog numbers

Technical Data 10488

Effective August 2017

Fuse
amp range Poles

Terminal type Optional covers*

Box lug/slot screw Box lug/hex screw #10-32 Phil-slot screw Pressure plate Indicating** Non-indicating

1 JM60030-1CR JM60030-1CHR JM60030-1SR JM60030-1PR

up to 30

3 JM60030-3CR JM60030-3CHR JM60030-3SR JM60030-3PR

1 JM60060-1CR JM60060-1CHR

35 to 60

2 JM60060-2CR JM60060-2CHR

— — CVRI-J-60060 CVR-J-60060

3 JM60060-3CR JM60060-3CHR

* Covers sold separately, one cover per pole.
** Open fuse indication requires 90 volts minimum and closed circuit to operate.

Table 2: 30 and 60 amp block terminals and conductors

Terminal type AWG type/range AWG Torque N•m (lb-in)

2-3 5.6 (50)
4-6 5.1 (45)
8 4.5 (40)
10-14 4.0 (35)

10-18 2.3 (20)

Box lug

#10-32 Phil-slot
screw

Pressure plate

75°C
Cu 2-14,
AL 2-8

75/90°C
Cu 10-18

CVRI-J-60030 CVR-J-600302 JM60030-2CR JM60030-2CHR JM60030-2SR JM60030-2PR

Recommended Bussmann series fuses:

Description Amps Data sheet no.

Ultimate protection Low-Peak LPJ time­delay fuses

Advanced protection Limitron JKS fast­acting fuses

up to 60 1006

up to 60 1026

High speed DFJ drive fuse up to 60 1048

Recommended accessories for 30 and 60 amp blocks:

Description Catalog no.

DIN-Rail end stops

Marker labels TM26CB

BRKT-ND
BRKT-NDSCREW2

Finger grips on cover
for easy removal

Standard phase barriers
for additional safety

Toolless interlocking modular design
for easy point-of-use assembly

DIN-rail or panel mounting
on each pole provides
installation flexibility

*No fuse derating necessary.

Marker label provision for easy
circuit dientification

Optional see-through, snap-on
cover for easy visual inspection

Optional open fuse indication
speeds troubleshooting

Vent slots improve cooling*

Lockout/tagout feature
improves safety

Probe holes for easy testing
without removing cover

3

Technical Data 10488

Class J modular ferrule and knifeblade fuse blocks

Effective August 2017

Dimensions; 30A Class J block - in (mm)

28

1.1

12.5 87

JM60030-1CR

3.4

R3

.1

55

2.2

JM60030-2CR

PROVISION FOR
MARKING LABEL

JM60030-3CR

46

1.8

17.7

28

29

1.1

58

1.1
56

2.2

2.3

83

3.3

PROVISION FOR
MARKING LABEL

110

CVR-J-60030
(NON INDICATING)

CVRI-J-60030
(WITH INDICATION)

4.3

84

3.3

4

LOCKOUT ­TAGOUT RINGS

JM60030-1CR

SHOWN WITH COVER