Littelfuse 81xxxxBP User Manual
CIRCUIT BREAKERS 17
MRB
MCB
MXB
CBF
UCB
Universal Circuit Breakers
Universal Circuit Breakers function identically and have same internal components as
OEM breakers but offer the versatility of snap off terminals for greater flexibility. SAE
Type II modified reset used primarily as a wiring harness protector in 12 volt DC automotive systems. Meets OEM requirements. Conforms to SAE J553C standard.
Designed to mount in ATO style fuse blocks and panels.
Bulk
Part No.
UCB 5
UCB 10
UCB 15
US
Carded No.
UCB 5 BP
UCB 10 BP
UCB 15 BP
Canadian
Carded No.
UCB 5 CABP
UCB 10 CABP
UCB 15 CABP
Amp
Rating
5
10
15
Bulk
Part No.
UCB 20
UCB 25
UCB 30
US
Carded No.
UCB 20 BP
UCB 25 BP
UCB 30 BP
Canadian
Carded No.
UCB 20 CABP
UCB 25 CABP
UCB 30 CABP
Amp
Rating
20
25
30
Manually Resettable Circuit Breakers
Manually Resettable Circuit Breakers feature an external button to allow resetting of the
device in a safe, convenient manner. SAE Type III manual reset used primarily as a
wiring harness protector in heavy duty 12 volt DC truck systems. Meets OEM requirements. Designed to mount in ATO style fuse blocks and panels.
Bulk
Part No.
MRB 10
MRB 15
MRB 20
MRB 25
MRB 30
Amp
Rating
10
15
20
25
30
Color
Red
Blue
Gold
Silver
Green
OEM #
Navistar 2011944C1
Navistar 2011945C1
Navistar 2011946C1
Navistar 2011947C1
Navistar 2011948C1
MAXI™Circuit Breakers
Direct factory replacement for many domestic OEM applications. Designed to fit a
™
MAXI
Blade fuse block or panel. Available in either SAE Type I cycling or SAE Type II
non-cycling used primarily as a wiring harness protector in 12 volt DC automotive
systems. Meets OEM requirements. Conforms to SAE J553C standard.
Bulk
Part No.
Cycling Design – Type I
MCB 20
MCB 30
Non-Cycling Design – Type II
MXB 20
MXB 30
MXB 40
US
Carded No.
MCB 20 BP
MCB 30 BP
MXB 20 BP
MXB 30 BP
MXB 40 BP
Canadian
Carded No.
MCB 20 CABP
MCB 30 CABP
MXB 20 CABP
MXB 30 CABP
MXB 40 CABP
Amp
Rating
20
30
20
30
40
Typical Application
Automotive Headlamp
Automotive Headlamp,
Seats & Wipers
Automotive Power Devices
Heavy Truck & Auto
Cooling Fan
Automotive Power Window
Heavy Truck & Auto Cooling
Fan & Power Window
Heavy Truck
OEM No.
GM# 12065132
GM# 12088553
GM# 12077842
Ford# F6HT-14526-KA
GM# 12077843
Ford# F6HT-14526-LA
Ford# F6HT-14526-JA
CIRCUIT
BREAKERS
Fuse Clip Circuit Breakers
Direct replacement for many OEM applications. Designed for glass fuses without
physical alteration in the system. Fits 1
primarily as a wiring harness protector in 12 volt DC automotive systems. Conforms to
SAE J553C standard.
813
Bulk
Part No.
CBF 10
CBF 15
CBF 20
CBF 25
US
Carded No.
CBF 10 BP
CBF 15 BP
CBF 20 BP
CBF 25 BP
Stud Type Low Voltage (6–12 Volts) Circuit Breakers
SAE Type I automatic reset provides protection in installations where it is not possible to
manually reset a breaker because of location or safety requirements. Used primarily as
a wiring harness protector in 12 volt DC automotive systems. Conforms to SAE J553C
812
standard. Available with mounting bracket-change part number from 812 to 813, e.g.
813005 ST.
Bulk
Part No.
812005 ST
812006 ST
812008 ST
812010 ST
812015 ST
812020 ST
US
Carded No.
N/A
N/A
N/A
N/A
N/A
812020 BP
Visit our web site at www.littelfuse.com
Canadian
Carded No.
CBF 10 CABP
CBF 15 CABP
CBF 20 CABP
CBF 25 CABP
Canadian
Carded No.
N/A
N/A
N/A
N/A
N/A
812020 CABP
1
/4" fuse clips. SAE Type II non-cycling used
Amp
Rating
10
15
20
25
Amp
Rating
5
6
8
10
15
20
Bulk
Part No.
CBF 30
CBF 35
CBF 40
Bulk
Part No.
812025 ST
812030 ST
812035 ST
812040 ST
812050 ST
US
Carded No.
CBF 30 BP
CBF 35 BP
CBF 40 BP
US
Carded No.
N/A
812030 BP
N/A
812040 BP
812050 BP
Canadian
Carded No.
CBF 30 CABP
CBF 35 CABP
CBF 40 CABP
Canadian
Carded No.
812030 CABP
812040 CABP
812050 CABP
N/A
N/A
Rating
Rating
E
L
A
N
I
G
I
R
O
OEM
S
U
P
P
Amp
30
35
40
Amp
25
30
35
40
50
Q
U
I
E
I
L
P
M
E
N
T
R
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