1.25 A Fuses

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of 732

Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Mounting Type	Fuse Type	Current Rating (Amps)	Voltage Rating - AC	Voltage Rating - DC	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	Approval Agency	Operating Temperature	Color	Size / Dimension
02391.25MXP FUSE GLASS 1.25A 250VAC 5X20MM Littelfuse Inc.	580 In Stock	1 : £1.10000 Bulk	239	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Slow Blow	5mm x 20mm	100A	19.525	CE, CSA, KC, PSE, UL	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
3403.0167.24 FUSE BRD MNT 1.25A 250VAC 125VDC SCHURTER Inc.	7,490 In Stock	1 : £1.22000 Cut Tape (CT) 2,000 : £0.50051 Tape & Reel (TR)	UMT 250	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	250 V	125 V	Slow Blow	2-SMD, Square End Block	200A AC, 35A DC	4.5	CQC, cURus, KC, PSE/JET, UL, VDE	-55°C ~ 125°C	-	0.398" L x 0.118" W x 0.118" H (10.10mm x 3.00mm x 3.00mm)
ERB-RD1R25X FUSE BOARD MNT 1.25A 32VDC 0402 Panasonic Industry	32,121 In Stock	1 : £0.22000 Cut Tape (CT) 10,000 : £0.07404 Tape & Reel (TR)	ERB-RD	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	-	32 V	Fast Blow	0402 (1005 Metric)	35A	-	cUL, UL	-40°C ~ 125°C	-	0.040" L x 0.020" W x 0.019" H (1.00mm x 0.50mm x 0.48mm)
ERB-RE1R25V FUSE BOARD MNT 1.25A 32VDC 0603 Panasonic Industry	15,543 In Stock	1 : £0.24000 Cut Tape (CT) 5,000 : £0.08662 Tape & Reel (TR)	ERB-RE	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	-	32 V	Fast Blow	0603 (1608 Metric)	50A	-	cUL, UL	-40°C ~ 125°C	-	0.063" L x 0.032" W x 0.025" H (1.60mm x 0.81mm x 0.63mm)
C1F 1.25 FUSE BRD MT 1.25A 125VAC 63VDC Bel Fuse Inc.	2,372 In Stock	1 : £0.30000 Cut Tape (CT) 5,000 : £0.11326 Tape & Reel (TR)	C1F	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	125 V	63 V	Fast Blow	1206 (3216 Metric)	100A AC, 50A DC	0.023	AEC-Q200, cURus	-55°C ~ 125°C	-	0.126" L x 0.062" W (3.20mm x 1.58mm)
C2Q 1.25 FUSE BRD MT 1.25A 32VAC 63VDC Bel Fuse Inc.	43,945 In Stock	1 : £0.31000 Cut Tape (CT) 5,000 : £0.11621 Tape & Reel (TR)	C2Q	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	32 V	63 V	Fast Blow	0603 (1608 Metric)	35A AC, 50A DC	0.058	CE, cURus	-55°C ~ 125°C	-	0.063" L x 0.032" W x 0.019" H (1.60mm x 0.82mm x 0.48mm)
0685T1250-01 FUSE BRD MT 1.25A 63VAC/VDC 1206 Bel Fuse Inc.	11,855 In Stock	1 : £0.33000 Cut Tape (CT) 5,000 : £0.12045 Tape & Reel (TR)	C1T	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	63 V	63 V	Slow Blow	1206 (3216 Metric)	50A	0.2	AEC-Q200, CE, cURus	-55°C ~ 125°C	-	0.126" L x 0.062" W x 0.025" H (3.20mm x 1.58mm x 0.63mm)
C1Q 1.25 FUSE BRD MT 1.25A 125VAC 63VDC Bel Fuse Inc.	32,742 In Stock	1 : £0.33000 Cut Tape (CT) 5,000 : £0.12413 Tape & Reel (TR)	C1Q	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	125 V	63 V	Fast Blow	1206 (3216 Metric)	100A AC, 50A DC	0.002	CE, CSA, cULus	-55°C ~ 125°C	-	0.126" L x 0.062" W x 0.023" H (3.20mm x 1.58mm x 0.58mm)
0697W1250-02 FUSE BRD MNT 1.25A 350VAC 72VDC Bel Fuse Inc.	4,775 In Stock	1 : £0.41000 Cut Tape (CT) 1,000 : £0.18186 Tape & Box (TB)	0697W	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1.25 A	350 V	72 V	Slow Blow	Radial, Box	100A	10.5	AEC-Q200, CQC, cURus, PSE, VDE	-55°C ~ 125°C	-	0.329" L x 0.157" W x 0.307" H (8.35mm x 4.00mm x 7.80mm)
02171.25MXP FUSE GLASS 1.25A 250VAC 5X20MM Littelfuse Inc.	2,753 In Stock	1 : £0.42000 Bulk	217	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Fast Blow	5mm x 20mm	35A	2.23	BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
MRT 1.25-BULK FUSE BRD MNT 1.25A 250VAC RADIAL Bel Fuse Inc.	56,016 In Stock	1 : £0.44000 Bulk	MRT	Bulk	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1.25 A	250 V	-	Slow Blow	Radial, Can, Vertical	50A	11.0	AEC-Q200, CCC, CE, CSA, cURus, PSE, SEMKO, VDE	-55°C ~ 125°C	-	0.329" Dia x 0.303" H (8.35mm x 7.70mm)
02171.25HXP FUSE GLASS 1.25A 250VAC 5X20MM Littelfuse Inc.	2,769 In Stock	1 : £0.44000 Bulk	217	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Fast Blow	5mm x 20mm	35A	2.23	BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
BK/AGC-1-1/4-R FUSE GLASS 1.25A 250VAC 3AB 3AG Eaton - Electronics Division	0 In Stock 8,595 Marketplace Check Lead Time	1 : £0.46000 Bulk	AGC	Bulk Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	100A	5.094	CSA, UL	-55°C ~ 125°C	-	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
39211250000 FUSE BRD MNT 1.25A 250VAC RADIAL Littelfuse Inc.	4,200 In Stock	1 : £0.50000 Cut Tape (CT) 1,400 : £0.18649 Tape & Box (TB)	TE5® 392	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1.25 A	250 V	-	Slow Blow	Radial, Box	25A	9.75	CQC, cULus, KC, PSE/JET, SEMKO, VDE	-40°C ~ 125°C	-	0.335" L x 0.157" W x 0.315" H (8.50mm x 4.00mm x 8.00mm)
5HT 1.25-R FUSE CERAMIC 1.25A 250VAC 5X20MM Bel Fuse Inc.	1,164 In Stock	1 : £0.55000 Bulk	5HT	Bulk	Active	Requires Holder	Cartridge, Ceramic	1.25 A	250 V	-	Slow Blow	5mm x 20mm	1.5kA	3.0	CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, VDE	-55°C ~ 125°C	-	0.201" Dia x 0.787" L (5.10mm x 20.00mm)
0034.3118 FUSE GLASS 1.25A 250VAC 5X20MM SCHURTER Inc.	3,046 In Stock	1 : £0.61000 Bulk	FST 5x20	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Slow Blow	5mm x 20mm	35A	5.5	CCC, cURus, PSE/JET, VDE	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
SF-0603F125-2 FUSE BOARD MNT 1.25A 32VDC 0603 Bourns Inc.	25,802 In Stock	1 : £0.68000 Cut Tape (CT) 5,000 : £0.25318 Tape & Reel (TR)	SinglFuse™ SF-0603F	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	-	32 V	Fast Blow	0603 (1608 Metric)	50A	0.027	UL	-20°C ~ 105°C	-	0.063" L x 0.032" W x 0.018" H (1.60mm x 0.80mm x 0.45mm)
3413.0116.22 FUSE BOARD MNT 1.25A 32VAC 63VDC SCHURTER Inc.	1,586 In Stock	1 : £0.75000 Cut Tape (CT) 1,000 : £0.33635 Tape & Reel (TR)	USF 1206	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	32 V	63 V	Fast Blow	1206 (3216 Metric)	50A	0.12	cURus	-55°C ~ 90°C	-	0.126" L x 0.063" W x 0.024" H (3.20mm x 1.60mm x 0.60mm)
3SB 1.25-R FUSE GLASS 1.25A 250VAC 3AB 3AG Bel Fuse Inc.	2,241 In Stock	1 : £0.80000 Bulk	3SB	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200A	25.4	CE, CSA, cULus, PSE	-55°C ~ 125°C	-	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
0001.2505 FUSE CERM 1.25A 250VAC 300VDC SCHURTER Inc.	1,478 In Stock	1 : £0.84000 Bulk	SPT 5x20	Bulk	Active	Requires Holder	Cartridge, Ceramic	1.25 A	250 V	300 V	Slow Blow	5mm x 20mm	1.5kA	1.86	CCC, cURus, KC, PSE/JET, VDE	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
0678H1250-02 FUSE BRD MNT 1.25A 250VAC 125VDC Bel Fuse Inc.	3,423 In Stock	1 : £0.92000 Cut Tape (CT) 2,000 : £0.37762 Tape & Reel (TR)	0678H	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	250 V	125 V	-	2-SMD, Square End Block	300A AC, 2kA DC	0.4	AEC-Q200, cURus	-55°C ~ 125°C	-	0.386" L x 0.120" W x 0.120" H (9.80mm x 3.05mm x 3.05mm)
8020.5069.G FUSE CERM 1.25A 500VAC/VDC 3AB SCHURTER Inc.	1,756 In Stock	1 : £0.92000 Bulk	SHF 6.3x32	Bulk	Active	Requires Holder	Cartridge, Ceramic	1.25 A	500 V	500 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	1.5kA	2.9	cURus	-40°C ~ 85°C	-	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
BK/MDL-1-1/4-R FUSE GLASS 1.25A 250VAC 3AB 3AG Eaton - Electronics Division	924 In Stock	1 : £0.92000 Bulk	MDL	Bulk	Active	Requires Holder	Cartridge, Glass	1.25 A	250 V	-	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	100A	86.2	CE, CSA, UL	-	-	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
04661.25NRHF FUSE BOARD MOUNT 1.25A 63VAC/VDC Littelfuse Inc.	8,265 In Stock	1 : £0.93000 Cut Tape (CT) 5,000 : £0.30863 Tape & Reel (TR)	SlimLine™ 466	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	63 V	63 V	Fast Blow	1206 (3216 Metric)	50A	0.064	CSA, UL	-55°C ~ 90°C	-	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)
04661.25NR FUSE BOARD MOUNT 1.25A 63VAC/VDC Littelfuse Inc.	6,770 In Stock	1 : £0.93000 Cut Tape (CT) 5,000 : £0.30863 Tape & Reel (TR)	SlimLine™ 466	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1.25 A	63 V	63 V	Fast Blow	1206 (3216 Metric)	50A	0.064	CSA, UL	-55°C ~ 90°C	-	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)

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About Fuses

Fuses are fundamental circuit protection devices used in automotive and electronic systems to protect wiring and components from overcurrent, overload, and short circuit conditions. Under normal operation, current flows through a calibrated metal element designed for a specific rating. When current exceeds that limit, due to a short circuit, inrush current, or sustained overload, the element heats and melts, permanently opening the circuit. Because most fuses are non-resettable, they must be replaced after operation. They provide fast, reliable protection for both low-voltage and high-voltage circuits.

Common formats include mini, low-profile mini, ATO/ATC, and maxi fuses. Selection must match:

Current rating (never oversize)
Physical format (fit in fuse block)
Ambient temperature derating (high under-hood temps reduce effective capacity)
Load behavior (steady vs inrush-heavy circuits) using time-current selection curves
PCB / SMD Fuse Selection & Behavior

In electronic circuits, SMD fuses protect low-voltage PCB traces and components. Proper selection depends on:

Rated current and voltage

Fast-acting vs time-delay response
Ambient temperature derating (hot boards reduce fuse capacity)
Surge tolerance using manufacturer time-current curves

These factors ensure the fuse survives normal transients but opens under true fault conditions without damaging the board.

Troubleshooting & Replacement Checklist

Confirm failure
Check loss of circuit function
Verify with multimeter continuity test (do not rely on visual inspection alone)
Check for root cause
Look for parasitic draw conditions (unexpected current drain)
Inspect wiring for shorts or overload sources
Verify fuse holder contact integrity (loose, corroded, or heat-damaged terminals)
Replace correctly
Match exact amperage rating
Match physical size and type
Match response type (fast vs time-delay)

If a replacement fuse blows immediately, the fault is still present and must be resolved before re-energizing the circuit.

About Fuses

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