Technical Data 10289 Effective December 2015
Supersedes November 2014
Product description:
HM Class H(K) JM Class J and RM Class R
modular ferrule fuse blocks for fuses up to 60
amps.
The new Bussmann® series fuse blocks contain
multiple features that increase versatility,
reduce labor and enhance safety for any panel
or electrical system design.
Features and benefits:
• Available in 1-, 2-, and 3-pole configurations
to meet stocking requirements.
• To reduce inventory, assembly time and
labor, modular single-pole blocks snap-
together for tool-less assembly of multiple
poles at point of use.
• DIN-Rail and panel mount versatility
allows one product to be used for multiple
applications with lower inventory cost.
• Save panel space with the smallest width
dimension on the market.
• Optional see-through, IP20 finger-safe
covers enhance safety with lock-out/tag-out
capability.
• Optional open fuse indication on covers
speeds troubleshooting.
• Easy circuit identification with available
universal marker labels for blocks and
covers.
Class H(K), J and R modular ferrule fuse blocks
BUSSMANN
SERIES
2
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Specications
Ratings:
• Volts Class H 250V, 600V
Class J 600V
Class R 250V, 600V
• Amps up to 60A
• Withstand Class J and R 200kA RMS Sym
Class H(K) 10kA RMS Sym
Agency information:
Blocks:
• UL® Listed E14853 - IZLT
• CSA® Certified 47235-6225-01
• CE
• RoHS Compliant
• Conflict mineral free
• REACH declaration available upon request
Covers:
• UL Listed E58836 - JDVS
• CSA Certified 47235-6225-01
• RoHS Compliant
• REACH declaration available upon request
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
• Non-Indicating covers -40°C to +120°C
• Indicating covers -20°C to +90°C*
* Indication requires minimum 90Vac/dc and closed circuit to illuminate.
Materials:
• Base — Thermoplastic
• Terminals — Tin-plated copper brass
• Covers — Thermoplastic
Recommended Bussmann series fuses:
Class H(K)
• Basic protection general purpose 250V NON, data sheet
No. 1030
• Basic protection general purpose 600V NOS, data sheet
No. 1030
Class J
• Ultimate protection Low-Peak™ LPJ time-delay fuses,
data sheet No. 1006
• Advanced protection Limitron™ JKS fast-acting fuses,
data sheet No. 1026
Class R
• Ultimate protection Low-Peak LPN 250V time-delay,
data sheet No. 1003
• Ultimate protection Low-Peak LPS 600V time-delay,
data sheet No. 1001
• Advanced protection Limitron KTN-R 250V fast-acting,
data sheet No. 1043
• Advanced protection Limitron KTS-R 600V fast-acting,
data sheet No. 1044
• Advanced protection energy efficient Fusetron™ FRN 250V
time-delay, data sheet No. 1019
• Advanced protection energy efficient Fusetron FRS, 600V
time-delay, data sheet No. 1017
Recommended Bussmann series DIN-Rail end stops:
• Part No. BRKT-ND
• Part No. BRKT-NDSCREW2
Marker labels:
• Use Bussmann series part number TM26CB
Table 1. Terminals, conductors and torque values
Terminal type AWG type/range
Torque
AWG Lb-in (N•m)
Box Lug (“CR” Option) 75°C Cu 2-14, AL 2-8
2-3;
4-6;
8;
10-14;
50 (5.6)
45 (5.1)
40 (4.5)
35 (4.0)
All other terminals* 75/90°C Cu 10-18 10-18; 20 (2.3)
* 3/16“ Quick Connect terminal maximum ampacity dependent on female spade connector and wire ratings.
3
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Table 2. Class H fuse block catalog numbers
Terminal type
Volts Fuse amp range PolesBox lug #10-32 Phil-slot screw Screw with quick-connect* Pressure plate
HM25030-1CR HM25030-1SR HM25030-1QR HM25030-1PR
250
1/2 to 30
1
HM25030-2CR HM25030-2SR HM25030-2QR HM25030-2PR 2
HM25030-3CR HM25030-3SR HM25030-3QR HM25030-3PR 3
HM25060-1CR — — —
31 to 60
1
HM25060-2CR — — — 2
HM25060-3CR — — — 3
HM60030-1CR HM60030-1SR — HM60030-1PR
600
1/2 to 30
1
HM60030-2CR HM60030-2SR — HM60030-2PR 2
HM60030-3CR HM60030-3SR — HM60030-3PR 3
HM60060-1CR — — —
31 to 60
1
HM60060-2CR — — — 2
HM60060-3CR — — — 3
* 3/16“ Quick Connect terminal maximum ampacity dependent on female spade connector and wire ratings.
Table 4. Class R fuse block catalog numbers
Terminal type
Volts Fuse amp range PolesBox lug #10-32 Phil-slot screw Screw with quick-connect Pressure plate
RM25030-1CR RM25030-1SR RM25030-1QR RM25030-1PR
250
1/2 to 30
1
RM25030-2CR RM25030-2SR RM25030-2QR RM25030-2PR 2
RM25030-3CR RM25030-3SR RM25030-3QR RM25030-3PR 3
RM25060-1CR — — —
31 to 60
1
RM25060-2CR — — — 2
RM25060-3CR — — — 3
RM60030-1CR RM60030-1SR — RM60030-1PR
600
1/2 to 30
1
RM60030-2CR RM60030-2SR — RM60030-2PR 2
RM60030-3CR RM60030-3SR — RM60030-3PR 3
RM60060-1CR — — —
31 to 60
1
RM60060-2CR — — — 2
RM60060-3CR — — — 3
* 3/16“ Quick Connect terminal maximum ampacity dependent on female spade connector and wire ratings.
Table 3. Class H block covers
Fuse block series Volts Amp range
Catalog numbers
Indicating Non-indicating
HM25030-#XX 250 1/2 to 30 CVRI-RH-25030 CVR-RH-25030
HM25060-#XX 31 to 60 CVRI-RH-25060 CVR-RH-25060
HM60030-#XX 600 1/2 to 30 CVRI-RH-60030 CVR-RH-60030
HM60060-#XX 31 to 60 CVRI-RH-60060 CVR-RH-60060
# = number of poles
XX = terminal type
Table 5. Class R block covers
Fuse block series Volts Amp range
Catalog numbers
Indicating Non-indicating
RM25030-#XX 250 1/2 to 30 CVRI-RH-25030 CVR-RH-25030
RM25060-#XX 31 to 60 CVRI-RH-25060 CVR-RH-25060
RM60030-#XX 600 1/2 to 30 CVRI-RH-60030 CVR-RH-60030
RM60060-#XX 31 to 60 CVRI-RH-60060 CVR-RH-60060
# = number of poles
XX = terminal type
4
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Class H(K) and R 250V - 30A block
50
2.0
49
1.9
75
2.9
74
2.9
80
3.2
26
1.0
25
1.0
36
1.4
50
2.0
51
2.0
45
1.8
99
3.9
With cover.
See tables 3 and 5 for available covers.
25
1.0
15
.6
5
.2
13
.5
R3
.1
Class H(K) and R 250V - 60A block
135
5.3
47
1.8
58
2.3
34
1.3
19
.7
68
2.7
69
2.7
32
1.2
102
4.0
103
4.1
108
4.2
7
.3
4
.2
3
.1
Ø6
.2
34
1.3
35
1.4
With cover.
See tables 3 and
5 for available
covers.
Dimensions - mm (in):
5
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Class H(K) and R 600V - 30A block
88 3.5
90 3.5
59
2.3
60
2.4
29
1.2
30
1.2
31
1.2
58
2.3
183
7.2
With cover.
See tables 3 and 5 for available covers.
159
6.25
80
3.13
16
.61
Ø7
.28
4.16
2.08
.28
Ø7
2.08
Class H(K) and R 600V - 60A block
66
2.6
54
2.1
3
.1
5
.2
8
.3
Ø7
.3
38
1.5
17
.7
77
3.0
115
4.5
116
4.6
82
3.2
38
1.5
39
1.6
With cover.
See tables 3 and
5 for available
covers.
172
[6.8]
202
[8.0]
Dimensions - mm (in):
6
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Table 6. Class J fuse block catalog numbers
Terminal type
Volts Fuse amp range PolesBox lug #10-32 Phil-slot screw Pressure plate
JM60030-1CR JM60030-1SR JM60030-1PR
600
1/2 to 30
1
JM60030-2CR JM60030-2SR JM60030-2PR 2
JM60030-3CR JM60030-3SR JM60030-3PR 3
JM60060-1CR — —
31 to 60
1
JM60060-2CR — — 2
JM60060-3CR — — 3
Table 7. Class J block covers
Fuse block series Volts Amp range
Catalog numbers
Indicating Non-indicating
JM60030-#XX 600 1/2 to 30 CVRI-J-60030 CVR-J-60030
JM60060-#XX 31 to 60 CVRI-J-60060 CVR-J-60060
# = number of poles
XX = terminal type
7
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
Class J - 30A block
17
.7
46
1.8
58
2.3
R3
.1
12
.5
87
3.4
29
1.1
28
1.1
28
1.1
56
2.2
55
2.2
110
4.3
84
3.3
83
3.3
With cover.
See table 7 for available covers.
Class J - 60A block
53
2.1
65
2.6
18
.7
39
1.5
38
1.5
94
3.7
7
.3
R3
.1
18
.7
5
.2
77
3.0
75
3.0
38
1.5 113
4.5
114
4.5
119
4.7
With cover.
See table 7 for available covers.
Dimensions - mm (in):
8
Technical Data 10289
Effective December 2015
Class H(K), J and R ferrule fuse blocks
Eaton.com/bussmannseries
The only controlled copy of this data sheet is the electronic read-only version located on the Eaton network drive. All other copies of this
document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical
information that will help the end user with design applications. Eaton reserves the right, without notice, to change design or construction
of any products and to discontinue or limit distribution of any products. Eaton also reserves the right to change or update, without notice,
any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible
applications.
Installing/removing covers
Closing cover: P
osition cover
over block and push straight
down until it snaps/clicks
into plac
e.
Opening cover: Using both outside
handles, pull straight up.
Installing blocks on DIN-Rail
Place one edge of DIN-Rail in fuse block base, then rotate block down until it clicks into place.
Eato, Bussmann, Fusetron, Limitron and
Low-Peak are valuable trademarks of Eaton
in the US and other countries. You are not
permitted to use the Eaton trademarks
without prior written consent of Eaton.
CSA is a registered trademark of the
Canadian Standards Group.
UL is a registered trademark of
Underwriters Laboratories, Inc.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Bussmann Division
114 Old State Road
Ellisville, MO 63021
United States
Eaton.com/bussmannseries
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. 10289 - BU-SB14607
December 2015
For Eaton’s Bussmann series
product information,
call 1-855-287-7626 or visit:
Eaton.com/bussmannseries
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