19 Littelfuse Aftermarket Products Catalog
1
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30056-8 -BX –
12
8
Type I
30056-10 -BX – 10
30056-15 -BX – 15
30056-20 -BX – 20
30056-25 -BX – 25
30056-30 -BX -BP 30
30056-40 -BX – 40
30056-50 -BX – 50
30137-6* – –
12
6 •
Type I
sealed
30137-10* – – 10 •
30137-15 -BX – 15 •
30137-20 -BX – 20 •
30137-30 -BX – 30 •
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30055-8* – –
12
8
Type I
with bracket
30055-10 -BX – 10
30055-15 -BX -BP 15
30055-20 -BX -BP 20
30055-25 -BX – 25
30055-30 -BX -BP 30
30055-40 -BX -BP 40
30055-50 -BX -BP 50
30138-10* – –
12
10 •
Type I sealed
with bracket
30138-15* – – 15 •
30138-25* – – 25 •
30138-30 -BX – 30 •
30138-40* – – 40 •
30128-10 -BX –
12
10
Type I with
cross-bracket
30128-15 -BX – 15
30128-20 -BX – 20
30128-30 -BX – 30
30128-40 -BX – 40
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30171-10 -BX –
24
10
Type I
30171-15 -BX – 15
30171-20 -BX – 20
30171-30 -BX – 30
30172-10* – –
24
10 Type I
with bracket
30172-15 -BX – 15
30172-20 -BX – 20
30172-30 -BX – 30
3088-50* – –
12
50
Type I
double breaker
assembly
3088-60 -BX – 60
3088-80 -BX – 80
30507-60 -BX –
12
60 • Type I sealed
double breaker
assembly
30507-80 -BX – 80 •
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30062-20 -BX – 12 20 • Type I with
Bracket
30062-30 -BX – 30 •
30063-10* – –
12
10 •
Type I30063-20 -BX – 10 •
30063-30* – – 30 •
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30407-15 -BX –
12
15
Type III,
Cross-Bracket
30407-20 -BX – 20
30407-25* – – 25
30407-30 -BX – 30
30407-40 -BX – 40
30414-30* – – 12 30 • Type I,
Cross Bracket
30414-50 -BX – 50 •
PART NUMBERS VOLT
(V DC)
AMPS
(A)
SEALED
NOTES
BULK BOXED RETAIL
30401-15 -BX – 12 15 Type I
30401-20* – – 20
Steel Case With Stud Terminals
Circuit Breakers
Circuit Protection
Box Style Circuit Breakers
Steel or plastic housing. Steel box type is approximately 1 ¼" x ¾" x 2/3" and comes with integral brackets (to be directly affixed with screws
or bolts) or without (needs a mounting bracket). Breakers have 10-32 studs, blades or wire leads. Wire lead type has a 10" wire loop connected
to studs and PVC-coated. Loop is intended to be cut, stripped and spliced into a circuit.
Datasheet, wiring diagram, and additional pack sizes visit: littelfuse.com/CircuitBreakers
Steel Case With Blade TerminalsSteel Case With Wire Terminals, PVC-Coated Plastic Case, Stud Terminals
*Special Order Item
30056, 30137, 30171 - with studs, no bracket 30055, 30138, 30172 - with studs and bracket 300128 - with studs and cross-bracket 3088, 30507 - double breaker assembly
30062 with wire leads,
with bracket
30063 with wire leads,
without bracket 30407 - Studs and cross-bracket 30401 - steel case with blades
20littelfuse.com/Aftermarket
1
Circuit Breakers
PART NUMBERS DESCRIPTION NUMBER
OF GANGS
MATERIAL
DIMENSIONS MOUNTING HOLE
DIMENSIONS NOTES
BULK BOXED
30090-2 -BX
Mounting Bracket
2
Steel
.81” x 1.29” (122.2 x 32.8 mm) 4.00” (101.6mm) on centers
For all steel breakers without a bracket.
Breakers snap into position, engaging with
dimples in the case of the breaker.
30090-3 -BX 3 5.71” x 1.29” (145.0 x 32.8mm) 1.90” (124.5mm) on centers
30090-4 -BX 4 6.62” x 1.29” (160.1 x 32.8mm) 5.81” (147.6mm) on centers
30090-6 -BX 6 8.43” x 1.29” (214.1 x 32.8mm) 7.62” (193.5mm) on centers
30090-8 -BX 8 10.25” x 1.29” (260.4 x 32.8mm) 9.43” (239.5mm) on centers
87128-4 -BX
Mounting Bracket
4
Nylon
5.69” long (114.5mm) 4.89” (124.2mm) on centers
Secure stud-type breakers by tightening
the nuts on the breaker studs.
Slots: .910” (23.1mm) on centers,
.210” (5.3mm) wide
87128-6 -BX 6 7.51” long (190.8mm) 6.71” (170.4mm) on centers
87128-8 -BX 8 9.33” long (237.0mm) 8.53” (216.7mm) on centers
87128-10 -BX 10 11.15” long (283.2mm) 10.35” (262.9mm) on centers
87128-13 -BX 13 13.88” long (352.6mm) 13.08” (332.2mm) on centers
86099-2 -BX
Busbar
2
Brass
1.53” long (38.9mm) –
Holes: .910” (23.1mm) on centers,
0.21” (5.3mm) dia.
86099-3 -BX 3 2.43” long (61.7mm) –
86099-4 -BX 4 3.34” long (84.8mm) –
86099-5 -BX 5 4.24” long (197.7mm) –
86126-2 -BX
Busbar
2
Copper
1.41” x .560” (35.8 x 14.2mm) .910” (23.11mm) on centers
Recommended for use
with brackets 87128-X
Slots: .910” on centers,
.210” (5.3mm) wide
86126-4 -BX 4 3.23” x .560” (82.1 x 14.2mm) 2.73” (69.34mm) on centers
86126-6 -BX 6 5.05” x .560” (128.3 x 14.2mm) 4.55” (115.57mm) on centers
86126-8 -BX 8 6.87” x .560” (174.5 x 14.2mm) 6.37” (161.79mm) on centers
86126-12 -BX 12 10.51” x .560” (267.0 x 14.2mm) 10.01” (254.25mm) on centers
Circuit Breaker Accessories
Breaker mounting brackets & busbars. Mounting brackets available in steel or nylon and accept 30056 and 30137 series breakers.
Busbars are made from heavy solid brass or copper, with holes or slots that make it easy to connect box-type circuit breakers with studs, in
order to feed a number of protected circuits.
30090-04 4-gang steel bracket 87128-4 Nylon bracket 86099-5 brass busbar with holes 86126-4 copper busbar with slots
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 12V DC
automotive systems. Conforms to SAE J553C standard. Available with or without mounting bracket.
CURRENT
RATING (A)
BOXED W/O BRACKET BOXED W/ BRACKET CARDED
MATERIAL NUMBER MATERIAL NUMBER MATERIAL NUMBER
5 0812005.ZXST 0813005.ZXST –
6 0812006.ZXST 0813006.ZXST –
8 0812008.ZXST 0813008.ZXST –
10 0812010.ZXST 0813010.ZXST –
15 0812015.ZXST 0813015.ZXST –
20 0812020.ZXST 0813020.ZXST 0813020.XP
25 0812025.ZXST 0813025.ZXST –
30 0812030.ZXST 0813030.ZXST 0813030.XP
35 0812035.ZXST 0813035.ZXST –
4 0812040.ZXST 0813040.ZXST 0813040.XP
50 0812050.ZXST 0813050.ZXST 0813050.XP
