Littelfuse Fusible Resistors 18

  1. Home
  2. Fusible Resistors
Manufacturers (1)
    • Littelfuse
    • Bourns
    • Nte Electronics
    • Stackpole Electronics
    • TE Connectivity
    • Tt Electronics Plc
    • Vishay Intertechnology
    • Vitrohm Portuguesa Lda
    • Yageo
Resistor Type
    • FIXED RESISTOR
    • FIXED RESISTOR - FUSIBLE
    • FUSIBLE RESISTOR
Mounting Type
    • SURFACE MOUNT
    • THROUGH HOLE MOUNT
Resistance
    • .22 ohm
    • 1 ohm
    • 10 ohm
    • 100 ohm
    • 1000 ohm
    • 12 ohm
    • 150 ohm
    • 1500 ohm
    • 2.2 ohm
    • 200 ohm
    • 22 ohm
    • 220 ohm
    • 2200 ohm
    • 27 ohm
    • 3.3 ohm
    • 33 ohm
    • 39 ohm
    • 3900 ohm
    • 4.7 ohm
    • 47 ohm
    • 470 ohm
    • 5.1 ohm
    • 56 ohm
    • 6.8 ohm
    • 75 ohm
    • 8.2 ohm
    • 82 ohm
    • 91 ohm
Rated Power Dissipation (P)
    • .125 W
    • .25 W
    • .33 W
    • .5 W
    • 1 W
    • 2 W
    • 2.5 W
    • 3 W
    • 4 W
    • 5 W
    • 7 W
Maximum Operating Temperature
    • 100 Cel
    • 125 Cel
    • 155 Cel
    • 200 Cel
    • 275 Cel
    • 350 Cel
Tolerance
    • 10 %
    • 5 %
Fusing Time
    • 1 s
    • 14400 s
    • 2.5 s
    • 60 s
Diameter (Lead)
    • .54 mm
    • .55 mm
    • .58 mm
    • .65 mm
    • .7 mm
    • .75 mm
    • .8 mm
    • .81 mm
Rated Temperature
    • 125 Cel
    • 25 Cel
    • 40 Cel
    • 70 Cel
Technology
    • METAL ALLOY
    • METAL FILM
    • METAL OXIDE FILM
    • THICK FILM
    • THIN FILM
    • WIRE WOUND
Shape (Package)
    • CYLINDRICAL PACKAGE
    • RECTANGULAR PACKAGE
    • TUBULAR PACKAGE
Construction
    • Chip
    • Cylindrical
    • Fusible
    • Non-Flammable
    • Rectangular
    • Tubular
Packing Method
    • AMMO PACK
    • Ammo Pack
    • BAG, BULK
    • BULK
    • TR
    • TR, 11 INCH
    • TR, 12 INCH
    • TR, PAPER, 7 INCH
    • TR, Paper, 7 Inch
Size Code
    • 1206
No. of Terminals
    • 2
Package Style (Meter)
    • Axial
    • Radial
    • SMT
Terminal Shape
    • WIRE
    • WRAPAROUND
Sub-Category
    • FIXED RESISTOR
    • Fixed Resistors
    • Fusible Resistors
Dimensions
    • 22mm x 10mm
    • 3.2mm x 1.6mm x .5mm
    • 6.3mm x 2.3mm
Minimum Operating Temperature
    • -25 Cel
    • -40 Cel
    • -55 Cel
Temperature Coef (ppm/Cel)
    • 100
    • 170
    • 20
    • 200
    • 300
    • 350
    • 500
Terminal Finish
    • MATTE TIN
    • Matte Tin (Sn)
    • Matte Tin (Sn) - with Nickel (Ni) barrier
    • TIN
    • Tin (Sn)
    • Tin (Sn) - with Nickel (Ni) barrier
Length (Lead)
    • 25 mm
    • 26 mm
    • 33 mm
    • 35 mm
    • 38.1 mm
    • 5 mm
Height (Package)
    • .55 mm
    • 25 mm
Manufacturer Series
    • EMC
    • M25SI
    • R252
Operating Voltage
    • 10.4881 V
    • 12.8452 V
    • 12.9615 V
    • 125 V
    • 14.1421 V
    • 15 V
    • 15.3297 V
    • 15.6844 V
    • 16.5227 V
    • 16.7332 V
    • 17.3205 V
    • 2.8636 V
    • 20 V
    • 21.2132 V
    • 24.4949 V
    • 250 V
    • 28.2843 V
    • 3.0659 V
    • 3.1623 V
    • 3.6878 V
    • 3.755 V
    • 32 V
    • 350 V
    • 4.0497 V
    • 4.4721 V
    • 4.899 V
    • 4.9598 V
    • 5.4772 V
    • 5.831 V
    • 6.3246 V
    • 6.6332 V
    • 7.0711 V
    • 7.5763 V
    • 8.124 V
    • 8.3666 V
    • 9 V
    • 9.6954 V
    • 9.9499 V
Additional Features
    • FLAME PROOF
    • FLAME PROOF, FUSING POWER: 16 TIMES RATED POWER
    • FLAME PROOF, FUSING POWER: 25 TIMES RATED POWER
    • FLAME PROOF, LASER TRIMMABLE
    • FLAME PROOF, PRECISION
    • FLAMEPROOF
    • RATED AC VOLTAGE (V): 240
    • RATED CURRENT: 0.0625A
    • RATED CURRENT: 0.125A
    • RATED CURRENT: 0.25A
    • RATED CURRENT: 0.375A
    • RATED CURRENT: 0.5A
    • RATED CURRENT: 0.75A
    • RATED CURRENT: 1.5A
    • RATED CURRENT: 10A
    • RATED CURRENT: 12A
    • RATED CURRENT: 15A
    • RATED CURRENT: 1A
    • RATED CURRENT: 2.5A
    • RATED CURRENT: 2A
    • RATED CURRENT: 3.5A
    • RATED CURRENT: 3A
    • RATED CURRENT: 4A
    • RATED CURRENT: 5A
    • RATED CURRENT: 7A
Length (Package)
    • 11.5 mm
    • 12 mm
    • 12.7 mm
    • 13 mm
    • 13.97 mm
    • 14.5 mm
    • 15.5 mm
    • 16 mm
    • 16.5 mm
    • 17 mm
    • 18 mm
    • 26 mm
    • 3.2 mm
    • 6.3 mm
    • 6.5 mm
    • 9 mm
    • 9.5 mm
    • 9.7 mm
JESD-609 Code
    • e3
Series
    • M25SI
Diameter (Package)
    • 10 mm
    • 2.3 mm
    • 2.5 mm
    • 3.4 mm
    • 3.5 mm
    • 3.8 mm
    • 3.96 mm
    • 4 mm
    • 4.5 mm
    • 4.6 mm
    • 5 mm
    • 5.2 mm
    • 5.54 mm
    • 5.8 mm
    • 6 mm
    • 6.5 mm
    • 7.2 mm
    • 7.5 mm
    • 9.5 mm
Reference Standard
    • UL
Width (Package)
    • 1.6 mm
    • 9.5 mm
Reset All
Part RoHS Manufacturer Resistor Type Mounting Type Resistance Rated Power Dissipation (P) Maximum Operating Temperature Tolerance Fusing Time Diameter (Lead) Rated Temperature Technology Shape (Package) Construction Packing Method Size Code No. of Terminals Package Style (Meter) Terminal Shape Sub-Category Dimensions Minimum Operating Temperature Temperature Coef (ppm/Cel) Terminal Finish Length (Lead) Height (Package) Manufacturer Series Operating Voltage Additional Features Length (Package) JESD-609 Code Series Diameter (Package) Reference Standard Width (Package)

R252003

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

Fusible Resistors

-55 Cel

R252

125 V

RATED CURRENT: 3A

R25203.5

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 3.5A

R25202.5

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 2.5A

R252007

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 7A

R252002

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 2A

R252.125

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.125A

R252.062

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.0625A

R252.250

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.25A

R252015

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

32 V

RATED CURRENT: 15A

R252012

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

32 V

RATED CURRENT: 12A

R252010

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 10A

R25201.5

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 1.5A

R252005

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 5A

R252004

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 4A

R252001

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

Fusible Resistors

-55 Cel

R252

125 V

RATED CURRENT: 1A

R252.750

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.75A

R252.500

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.5A

R252.375

Littelfuse

FIXED RESISTOR - FUSIBLE

THROUGH HOLE MOUNT

14400 s

125 Cel

TUBULAR PACKAGE

TR

2

WIRE

-55 Cel

R252

125 V

RATED CURRENT: 0.375A

Fusible Resistors

Fusible resistors, also known as fuse resistors, are special types of resistors that have an added function of self-protection. They are designed to protect circuits from overloading and overheating by acting as fuses when exposed to excessive currents or power surges.

Fusible resistors work by including a fusible element within the resistor itself, such as a small metal wire or a coating of fusible alloy. When the current or power in the circuit exceeds the rated value of the resistor, the fusible element melts, creating an open circuit and disconnecting the power source from the rest of the circuit. This interrupts the flow of current, preventing damage to the circuit and the components it connects.

Fusible resistors are commonly used in applications where circuit protection is critical, such as in power supplies, motor controls, and electronic lighting systems. They are often employed in situations where conventional fuses or circuit breakers may not provide adequate protection or where space is limited. Fusible resistors are available in a range of resistance values, power ratings, and tolerances to suit various applications. They are typically marked with a symbol or a code to indicate their fusible nature.