1 A Fuses

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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
MFU0603FF01000P500 FUSE BOARD MOUNT 1A 32VDC 0603 Vishay	48,651 In Stock	1 : $0.47000 Cut Tape (CT) 5,000 : $0.17345 Tape & Reel (TR)	MFU	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	32 V	Fast Blow	0603 (1608 Metric)	50A	0.0028	IEC, UL	-55°C ~ 125°C	-	0.061" L x 0.033" W x 0.018" H (1.55mm x 0.85mm x 0.45mm)
0686F1000-01 FUSE BRD MNT 1A 32VAC 63VDC 0603 Bel Fuse Inc.	175,122 In Stock	1 : $0.74000 Cut Tape (CT) 5,000 : $0.27569 Tape & Reel (TR)	C2F	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	32 V	63 V	Fast Blow	0603 (1608 Metric)	35A AC, 50A DC	0.0028	AEC-Q200, cURus	-55°C ~ 125°C	-	0.063" L x 0.032" W x 0.020" H (1.60mm x 0.81mm x 0.52mm)
C1F 1 FUSE BRD MT 1A 125VAC 63VDC 1206 Bel Fuse Inc.	63,189 In Stock	1 : $0.74000 Cut Tape (CT) 5,000 : $0.27559 Tape & Reel (TR)	C1F	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	125 V	63 V	Fast Blow	1206 (3216 Metric)	100A AC, 50A DC	0.012	AEC-Q200, cURus	-55°C ~ 125°C	-	0.126" L x 0.062" W (3.20mm x 1.58mm)
0685T1000-01 FUSE BRD MNT 1A 63VAC 63VDC 1206 Bel Fuse Inc.	330,298 In Stock	1 : $0.79000 Cut Tape (CT) 5,000 : $0.29306 Tape & Reel (TR)	C1T	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	63 V	63 V	Slow Blow	1206 (3216 Metric)	50A	0.12	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)
F0603E1R00FSTR FUSE BOARD MOUNT 1A 32VDC 0603 KYOCERA AVX	1,087 In Stock	1 : $0.79000 Cut Tape (CT) 3,000 : $0.31406 Tape & Reel (TR)	Accu-Guard® II	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	32 V	Fast Blow	0603 (1608 Metric)	50A	0.008	cUL, UL	-55°C ~ 125°C	-	0.063" L x 0.032" W x 0.025" H (1.60mm x 0.81mm x 0.63mm)
C1Q 1 FUSE BOARD MOUNT 1A 125VAC 63VDC Bel Fuse Inc.	16,169 In Stock	1 : $0.81000 Cut Tape (CT) 5,000 : $0.30202 Tape & Reel (TR)	C1Q	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	125 V	63 V	Fast Blow	1206 (3216 Metric)	100A AC, 50A DC	9.6E-4	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)
F0402E1R00FSTR FUSE BOARD MOUNT 1A 32VDC 0402 KYOCERA AVX	3,430 In Stock	1 : $0.81000 Cut Tape (CT) 5,000 : $0.30061 Tape & Reel (TR)	Accu-Guard® II	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	32 V	Fast Blow	0402 (1005 Metric)	50A	0.008	cUL, UL	-55°C ~ 125°C	-	0.039" L x 0.022" W x 0.016" H (1.00mm x 0.55mm x 0.40mm)
0679L1000-05 FUSE BRD MNT 1A 125VAC/VDC 2SMD Bel Fuse Inc.	52,662 In Stock	1 : $0.88000 Cut Tape (CT) 5,000 : $0.32503 Tape & Reel (TR)	0679L	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	125 V	125 V	Fast Blow	2-SMD, Square End Block	50A AC, 300A DC	0.54	AEC-Q200, cURus	-55°C ~ 125°C	-	0.240" L x 0.100" W x 0.110" H (6.10mm x 2.54mm x 2.79mm)
MFU0805FF01000P100 FUSE BOARD MOUNT 1A 32VDC 0805 Vishay	15,917 In Stock	1 : $0.96000 Cut Tape (CT) 1,000 : $0.42431 Tape & Reel (TR)	MFU	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	32 V	Fast Blow	0805 (2012 Metric)	50A	0.0028	UL	-55°C ~ 125°C	-	0.079" L x 0.049" W x 0.018" H (2.00mm x 1.25mm x 0.45mm)
0697H1000-02 FUSE BRD MT 1A 350VAC 100VDC RAD Bel Fuse Inc.	14,002 In Stock	1 : $0.97000 Cut Tape (CT) 1,000 : $0.43534 Tape & Box (TB)	0697H	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1 A	350 V	100 V	Slow Blow	Radial, Box	100A AC, 65A DC	6.1	AEC-Q200, cURus	-55°C ~ 125°C	-	0.329" L x 0.157" W x 0.307" H (8.35mm x 4.00mm x 7.80mm)
0217001.MXP FUSE GLASS 1A 250VAC 5X20MM Littelfuse Inc.	40,072 In Stock	1 : $1.03000 Bulk	217	Bulk	Active	Requires Holder	Cartridge, Glass	1 A	250 V	-	Fast Blow	5mm x 20mm	35A	1.045	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)
0312001.HXP FUSE GLASS 1A 250VAC 3AB 3AG Littelfuse Inc.	23,606 In Stock	1 : $1.17000 Bulk	312	Bulk	Active	Requires Holder	Cartridge, Glass	1 A	250 V	-	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	35A	0.76	CE, CSA, KC, PSE, UL	-55°C ~ 125°C	-	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
0217001.HXP FUSE GLASS 1A 250VAC 5X20MM Littelfuse Inc.	37,252 In Stock	1 : $1.21000 Bulk	217	Bulk	Active	Requires Holder	Cartridge, Glass	1 A	250 V	-	Fast Blow	5mm x 20mm	35A	1.045	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)
SF-0603FP100F-2 FUSE BRD MNT 1A 65VAC/65VDC 0603 Bourns Inc.	1,895 In Stock	1 : $1.35000 Cut Tape (CT) 8,000 : $0.47115 Tape & Reel (TR)	SinglFuse™ SF-0603FPxxxF	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	65 V	65 V	Fast Blow	0603 (1608 Metric)	13A AC, 50A DC	0.042	UL	-55°C ~ 90°C	-	0.063" L x 0.032" W x 0.012" H (1.60mm x 0.81mm x 0.30mm)
SF-0603SP100M-2 FUSE BOARD MOUNT 1A 32VDC 0603 Bourns Inc.	22,057 In Stock	1 : $1.41000 Cut Tape (CT) 4,000 : $0.53618 Tape & Reel (TR)	SinglFuse™ SF-0603SPxxxM	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	32 V	Slow Blow	0603 (1608 Metric)	50A	0.093	-	-55°C ~ 150°C	-	0.063" L x 0.031" W x 0.031" H (1.60mm x 0.80mm x 0.80mm)
36911000000 FUSE BOARD MNT 1A 300VAC RADIAL Littelfuse Inc.	57,165 In Stock	1 : $1.68000 Cut Tape (CT) 1,400 : $0.61501 Tape & Box (TB)	TE5® 369	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1 A	300 V	-	Slow Blow	Radial, Box	50A	5.8	cULus, PSE/JET	-40°C ~ 85°C	-	0.335" L x 0.157" W x 0.315" H (8.50mm x 4.00mm x 8.00mm)
SR-5-1A-AP FUSE BOARD MNT 1A 250VAC RADIAL Eaton - Electronics Division	6,995 In Stock	1 : $1.82000 Cut Tape (CT) 1,000 : $0.81281 Tape & Box (TB)	SR-5	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1 A	250 V	-	Slow Blow	Radial, Can, Vertical	35A	7.5	CCC, cULus, KC-MARK, PSE, SEMKO, VDE	-40°C ~ 85°C	-	0.335" Dia x 0.319" H (8.50mm x 8.10mm)
0251001.MXL FUSE BRD MNT 1A 125VAC/VDC AXIAL Littelfuse Inc.	6,271 In Stock	1 : $2.24000 Bulk	PICO® II 251	Bulk	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1 A	125 V	125 V	Fast Blow	Axial	50A AC, 300A DC	0.256	CCC, CSA, cURus, PSE, TUV	-55°C ~ 125°C	-	0.110" Dia x 0.280" L (2.80mm x 7.11mm)
0466001.NR FUSE BRD MNT 1A 63VAC 63VDC 1206 Littelfuse Inc.	27,429 In Stock	1 : $2.25000 Cut Tape (CT) 5,000 : $0.75093 Tape & Reel (TR)	SlimLine™ 466	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	63 V	63 V	Fast Blow	1206 (3216 Metric)	50A	0.0423	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)
0440001.WR FUSE BRD MNT 1A 50VAC 50VDC 1206 Littelfuse Inc.	28,468 In Stock	1 : $2.58000 Cut Tape (CT) 3,000 : $0.87353 Tape & Reel (TR)	440	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	50 V	50 V	Fast Blow	1206 (3216 Metric)	50A	0.21054	CSA, UL	-55°C ~ 150°C	-	0.126" L x 0.064" W x 0.032" H (3.20mm x 1.63mm x 0.82mm)
0251001.MAT1L FUSE BRD MNT 1A 125VAC/VDC AXIAL Littelfuse Inc.	18,742 In Stock	1 : $2.60000 Cut Tape (CT) 1,000 : $0.99674 Tape & Box (TB)	PICO® II 251	Cut Tape (CT) Tape & Box (TB)	Active	Through Hole	Board Mount (Cartridge Style Excluded)	1 A	125 V	125 V	Fast Blow	Axial	50A AC, 300A DC	0.256	CCC, CSA, cURus, PSE, TUV	-55°C ~ 125°C	-	0.110" Dia x 0.280" L (2.80mm x 7.11mm)
0239001.MXP FUSE GLASS 1A 250VAC 5X20MM Littelfuse Inc.	5,569 In Stock	1 : $2.67000 Bulk	239	Bulk	Active	Requires Holder	Cartridge, Glass	1 A	250 V	-	Slow Blow	5mm x 20mm	35A	11.295	CE, CSA, KC, PSE, UL	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
TR/3216FF1-R FUSE BRD MNT 1A 32VAC 63VDC 1206 Eaton - Electronics Division	9,151 In Stock	1 : $2.69000 Cut Tape (CT) 3,000 : $1.05323 Tape & Reel (TR)	Chip 3216FF	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	32 V	63 V	Fast Blow	1206 (3216 Metric)	50A	0.03	CSA, UL	-55°C ~ 125°C	-	0.126" L x 0.063" W x 0.035" H (3.20mm x 1.60mm x 0.90mm)
CC12H1A-TR FUSE BOARD MOUNT 1A 63VDC 1206 Eaton - Electronics Division	2,382 In Stock	1 : $2.76000 Cut Tape (CT) 3,000 : $1.15571 Tape & Reel (TR)	CC12H	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Surface Mount	Board Mount (Cartridge Style Excluded)	1 A	-	63 V	Slow Blow	1206 (3216 Metric)	50A	0.18	cURus	-55°C ~ 125°C	-	0.126" L x 0.063" W x 0.024" H (3.20mm x 1.60mm x 0.60mm)
0218001.HXP FUSE GLASS 1A 250VAC 5X20MM Littelfuse Inc.	37,026 In Stock	1 : $2.94000 Bulk	218	Bulk	Active	Requires Holder	Cartridge, Glass	1 A	250 V	-	Slow Blow	5mm x 20mm	35A	6.73	CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, VDE	-55°C ~ 125°C	-	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

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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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