Feature

  • EIA standard color coding
  • Flame retardant type available
  • Low noise & voltage coefficient
  • Low temperature coefficient range
  • Multiple epoxy coating on vacuum-deposited metal film provides superior moisture protection
  • Nichrome resistive element provides stable performance in various environments
MF Series Resistor
Part No. Type Power Rating at 70°C Dimension(mm)
D Max. L Max. d±0.05 H±3
Normal Size
MFR0W8 MF-12 1/8W 1.9 3.5 0.45 28
MFR0W4 MF-25 1/4W 2.5 6.8 0.54 28
MFR0W2 MF-50 1/2W 3.5 10 0.54 28
MFR01W MF-100 1W 5 12 0.65 28
MFR02W MF-200 2W 5.5 16 0.70 28
MFR03W MF-300 3W 6.5 17.5 0.75 28
Small Size & Extra Small Size
MFR0S4 MF-25-S 1/4W 2 3.5 0.45 28
MFR004 MF-40-SS 0.4W 2 3.5 0.45 28
MFR0U2 MF-50-SS 1/2W 2.7 6.8 0.54 28
MFR0S2 MF-50-S 1/2W 3 9 0.54 28
MFR006 MF-60-S 0.6W 2.7 6.8 0.54 28

Standard Non-flammable coating for Small size type (except MF-50-S).

Derating Curve

Derating Curve
Part No. Type Dielectric Withstanding Voltage Max. Working Voltage Max. Overload Voltage Standard Order Special Order
Tolerance TCR Value Range Tolerance TCR Value Range
MFR0W8 MF-12 400V 200V 400V ±1% ±50 10Ω-1MΩ ±0.25% ±15 51.1Ω~200KΩ
MFR0S4 MF-25-S 200V 200V 400V ±2% ±100 10Ω-1MΩ ±0.5% ±25 51.1Ω~511KΩ
MFR004 MF-40-SS ±5% ±200 1Ω-1MΩ ±0.5% ±50 51.1Ω~511KΩ
MFR0W4 MF-25 500V 250V 500V ±1% ±50 10Ω-1MΩ ±0.1% ±15 10Ω~1MΩ
MFR0U2 MF-50-SS 250V 250V 500V ±2% ±100 1Ω-1MΩ ±0.25% ±25 10Ω~1MΩ
MFR006 MF-60-S ±5% ±200 1Ω-1MΩ ±0.5% ±50 10Ω~1MΩ
MFR0S2
MFR0W2		 MF-50-S
MF-50		 700V 350V 700V ±1% ±50 10Ω-1MΩ ±0.1% ±15 100Ω~330KΩ
±2% ±100 10Ω-1MΩ ±0.25% ±25 51.1Ω~511KΩ
±5% ±200 1Ω-1MΩ ±0.5% ±50 10Ω~1MΩ
MFR01W MF-100 1000V 500V 1000V ±1% ±50 51.1Ω-1MΩ ±0.1% ±15 100Ω~330KΩ
MFR02W MF-200 ±2% ±100 51.1Ω-1MΩ ±0.25% ±25 51.1Ω~511KΩ
MFR03W MF-300 ±5% ±200 1Ω-1MΩ ±0.5% ±50 51.1Ω~1MΩ

Performance Specification

Temperature coefficient refer to P.20
Short-time overload ΔR/R ≤ ±(0.5%+0.05Ω), with no evidence of mechanical damage
Dielectric withstanding voltage With no evidence of flashover, mechanical damage, arcing or insulation breakdown
Pulse overload ΔR/R ≤ ±(1%+0.05Ω), with no evidence of mechanical damage
Terminal strength No evidence of mechanical damage
Resistance to solering heat ΔR/R ≤ ±(1%+0.05Ω), with no evidence of mechanical damage
Resistance to solvent No deterioration of protective coating and marking
Temperature cycling ΔR/R ≤ ±(1%+0.05Ω), with no evidence of mechanical damage
Load life in humidity Normal type: ΔR/R ≤ ±1.5%, Flame retardant type: ΔR/R ≤ ±5%.
Load life Normal type: ΔR/R ≤ ±1.5%, Flame retardant type: ΔR/R ≤ ±5%.

Current Noise Level

Current Noise Level

Ordering Procedure (Example: MFR 1/8W 1% 50PPM 47.5KΩ T/R-5000)

MFR
Product Type:
  • MFR = Metal Film Fixed Resistors
0
Special Feature:
  • 0 = Standard
  • F = Flame retardant
  • I = Non-Inductive
  • C = Flammable type
W8
Wattage:
  • Normal size:
  • WG = 1/16W
  • W8 = 1/8W
  • W6 = 1/6W
  • W4 = 1/4W
  • W2 = 1/2W
  • 1W = 1W
  • 2W = 2W
  • 3W = 3W
  • Small size:
  • S4 = 1/4W-S
  • S2 = 1/2W-S
  • 06 = 0.6W-S
  • Extra small size:
  • U2 = 1/2W-SS
  • 04 = 0.4W-SS
F
Tolerance (&TCR):
  • B=±0.1% 15 PPM
  • C=±0.25% 25 PPM
  • D=±0.5% 50 PPM
  • F=±1% 50 PPM
  • G=±2% 100 PPM
  • J=±5% 200 PPM
  • For special tolerance-TCR requirement, please indiciate in the purchasing order.
  • Example: ±1% 15PPM
4752
Resistance Value
  • 5% (E-24 series):
  • the 1st digit is "0", the 2nd & 3rd digits are for the significant figures of the resistance and the 4th indicate the numbers of zeros following.
  • 1% or less & 2% (E-96 series):
  • the 1st to 3rd digits are for the significant figures of the resistance and the 4th indicate the numbers of zeros following.
T
Packing Type:
  • A = Tape/Box
  • T = Tape/Reel
  • B = Bulk/Box
  • P = Tape/Box of PT-26 product
5
Packing Qty.:
  • 1 = 1,000pcs
  • 2 = 2,000pcs
  • 3 = 3,000pcs
  • 4 = 4,000pcs
  • 5 = 5,000pcs
  • A = 500pcs
  • B = 2,500pcs
  • 0 = Bulk/Box
0
Additional Information:
  • 0 = NIL