Technical Data 2070
Effective December 2016
Supersedes December 1998
Feed-through and standalone stud type junction blocks
Studs
•
Non-feed-through junction blocks are plated
steel
Feed-through junction blocks are copper alloy
•
Note:
Voltage rating dependent upon installation
Suggested maximum termination ratings
Stud size/thread/
#10-32
#1/4-20
#5/16-18
#3/8-16
#1/2-20
Amps
50
100
200
250
400
Catalog symbols:
•
•
•
•
•
•
•
C19_
C27_
C29_
C40_
C58_
C63_
JB38_
Description:
Bussmann™ series feed-through and standalone
stud type junction blocks for heavy-duty ground or
power connection points in AC or DC circuits.
Modular construction offers design and
manufacturing flexibility with mounting options
well suited for transformers, communication and
computer power sections along with various
vehicle electrical systems.
Technical Data 2070
Effective December 2016
Feed-through and standalone stud type junction blocks
F
J
H
M (thread size)
1.87"
(47.6)
1.12"
(28.6)
0.75"
(19.1)
C B
K
A
K
A
G
E
D
L (4 mtg. holes)
Fig. 1
(Catalog numbers C1925, C1933, C1933-1)
L (2 mtg. holes)
Fig. 2
(All other catalog numbers)
Catalog numbers and dimensions — in (mm)
Catalog
no.
C2791*
Fig.
2
A
B
C
0.44 (11.2)
D
E
F
0.31 (7
.9)
G
0.69 (17
.5)
H
0.06 (1.6)
J
0.06 (1.6)
K
1.31 (33.3)
L
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.44
dia. C’bore x .16
deep
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.41
dia. C’bore x .14
deep
0.22 dia. w/.37
dia. C’bore x .14
deep
0.22 dia. w/.37
dia. C’bore x .14
deep
0.22 dia.
0.22 dia.
0.22 dia. w/.37
dia. C’bore x .14
deep
M
1/4-20
Material
Thermoset
Color
Black
2.06 (52.4) 0.69 (17
.5)
0.62 (15.9) 0.69 (17
.5)
C2909* †
2
2.06 (52.4) 0.69 (17
.5)
0.44 (11.2)
0.62 (15.9) 1.0 (25.4)
0.31 (7
.9)
0.69 (17
.5)
0.06 (1.6)
0.06 (1.6)
1.31 (33.3)
10-32
Thermoset
Black
C2909-1*
2
2.06 (52.4) 0.69 (17
.5)
0.44 (11.2)
0.62 (15.9) 1.0 (25.4)
0.31 (7
.9)
0.69 (17
.5)
0.06 (1.6)
0.06 (1.6)
1.31 (33.3)
1/4-20
Thermoset
Black
C1938*
2
2.06 (52.4) 0.94 (23.8) 0.69 (17
.5)
0.87 (22.2) 0.69 (17
.5)
0.31 (7
.9)
0.87 (22.2) 0.06 (1.6)
0.06 (1.6)
1.31 (33.3)
3/8-16
Thermoplastic
Black
C1925* †
1
2.75 (69.8) 1.5 (38.1)
1.25 (31.7)
1.25 (31.7)
1.12 (28.6)
0.37 (9.5)
1.12 (28.6)
0.19 (4.8)
0.19 (4.8)
2.0 (50.8)
1/2-13
Thermoplastic
Red
C4044* †
2
2.06 (52.4) 0.87 (22.2) 0.62 (15.9) 0.62 (15.9) 1.12 (28.6)
0.31 (7
.9)
0.87 (22.2) 0.06 (1.6)
0.06 (1.6)
1.31 (33.3)
3/8-16
Thermoplastic
Black
C5898* †
2
2.06 (52.4) 0.94 (23.8) 0.69 (17
.5)
0.87 (22.2) 0.69 (17
.5)
0.31 (7
.9)
0.87 (22.2) 0.06 (1.6)
0.06 (1.6)
1.31 (33.3)
3/8-16
Thermoplastic
Red
JB3816-2
2
2.12 (54.0) 1.0 (25.4)
0.62 (15.9) 0.94 (23.8) 0.69 (17
.5)
0.31 (7
.9)
None
0.06 (1.6)
None
1.37 (34.9)
3/8-16
Thermoplastic
Black
JB3816-3
C1933 †
C1933-1 †
C6344-1
2
1
1
2
2.12 (54.0) 1.0 (25.4)
0.62 (15.9) 0.94 (23.8) 0.69 (17
.5)
1.5 (38.1)
1.5 (38.1)
1.12 (28.6)
1.12 (28.6)
0.31 (7
.9)
0.37 (9.5)
0.37 (9.5)
0.31 (7
.9)
None
None
None
None
0.06 (1.6)
0.19 (4.8)
0.19 (4.8)
0.06 (1.6)
None
None
None
None
1.37 (34.9)
2 (50.8)
2 (50.8)
1.37 (34.9)
3/8-16
Thermoplastic
Red
Black
Black
Black
2.75 (69.8) 1.44 (36.6) 1.25 (31.7)
2.75 (69.8) 1.44 (36.3) 1.25 (31.7)
1/2-13 Thermoplastic
5/16-18 Thermoplastic
1/2-20
Thermoplastic
2.12 (54.0) 0.62 (15.9) 0.62 (15.9) 0.87 (22.2) 0.69 (17
.5)
* Feed-through options – Nuts and washers; consult factory.
† Not RoHS compliant.
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.
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Publication No. 2070 — BU-SB98107
December 2016
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