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Metal Film Fixed Resistors

Product ID: MF-12

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The MF series metal film resistors are manufactured using vacuum sputtering system to deposit multiple layers of mixed metals and passiivative materials onto a carefully treated high grade ceramic substrate, the resistors are coated with layers of light-blue lacquer. The MF series encompasses an unusually broad selection of power rating (1/8W, 1/4W, 1/2W, 1W, 2W, at 70 Celsius), tolerance (+/-0.1%, 0.25%, 0.5%, 1%) and temperature coefficient (25ppm, 50pp, 100ppm), in all their combinations with full MIL-R-10509 performance.
Specifications
  • MF-12:
    • MIL: RN-50
    • Tolerance: +/-1.0%, +/-0.5%, +/-0.25%
    • TC +/- 25ppm: 100ohm-100Kohm
    • TC +/- 50ppm: 10ohm-1Mohm
    • TC +/-10ppm: 10ohm-1Mohm (standard resistance is 10ohm-1Mohm, below or over this resistance on request)
  • MF-25:
    • MIL: RN-55
    • Tolerance: +/-1.0%, +/-0.5%, +/-0.25%, and +/-1%
    • TC +/- 25ppm: 51.1ohm-511Kohm, 100ohm-330Kohm, 100ohm-100Kohm
    • TC +/- 50ppm: 10ohm-1Mohm
    • TC +/-10ppm: 10ohm-1Mohm (standard resistance is 10ohm-1Mohm, below or over this resistance on request)
  • MF-50:
    • MIL: RN-60
    • Tolerance: +/-1.0%, +/-0.5%, +/-0.25%, and +/-1%
    • TC +/- 25ppm: 51.1ohm-1Mohm, 100ohm-511Kohm, 100ohm-330Kohm
    • TC +/- 50ppm: 10ohm-1Mohm
    • TC +/-10ppm: 10ohm-1Mohm (standard resistance is 10ohm-1Mohm, below or over this resistance on request)
  • MF-100:
    • MIL: RN-65
    • Tolerance: +/-1.0%, +/-0.5%, +/-0.25%, and +/-1%
    • TC +/- 25ppm: 51.1ohm-1Mohm, 100ohm-511Kohm, 100ohm-330Kohm
    • TC +/- 50ppm: 10ohm-1Mohm
    • TC +/-10ppm: 10ohm-1Mohm (standard resistance is 10ohm-1Mohm, below or over this resistance on request)
  • MF-200:
    • MIL: RN-60
    • Tolerance: +/-1.0%, +/-0.5%, +/-0.25%, and +/-1%
    • TC +/- 25ppm: 51.1ohm-1Mohm, 100ohm-511Kohm, 100ohm-330Kohm
    • TC +/- 50ppm: 10ohm-1Mohm
    • TC +/-10ppm: 10ohm-1Mohm (standard resistance is 10ohm-1Mohm, below or over this resistance on request)
  • Temperature cycling, -65 Celsius to +150 Celsius (%):
    • Resistance change (delta R): 0.25
    • MIL-R-22684 style RL requirement: 1.00
    • MIL-R-10509 style RN requirement: 0.50
  • Low temperature operation, -65 Celsius (%):
    • Resistance change (delta R): 0.50
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.50
  • Short time overload (%):
    • Resistance change (delta R): 0.25
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.50
  • Terminal strength, 5Ib pull (%):
    • Resistance change (delta R): 0.20
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.20
  • Resistance to soldering heat, +350 Celsius (%):
    • Resistance change (delta R): 0.10
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.50
  • Moisture resistance, MIL-Std-202 (%):
    • Resistance change (delta R): 0.50
    • MIL-R-22684 style RL requirement: 1.50
    • MIL-R-10509 style RN requirement: 1.50
  • Life 1000hrs (rated power) (%):
    • Resistance change (delta R): 0.50
    • MIL-R-22684 style RL requirement: 2.00
    • MIL-R-10509 style RN requirement: 1.00
  • Shock, 50G, 11ms (%):
    • Resistance change (delta R): 0.25
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.50
  • Vibration-high frequency, 10-2000Hz (%):
    • Resistance change (delta R): 0.25
    • MIL-R-22684 style RL requirement: 0.50
    • MIL-R-10509 style RN requirement: 0.50
  • Insulation resistance (%):
    • Resistance change (delta R): >= 10^10ohm
    • MIL-R-22684 style RL requirement: >= 10^9ohm
    • MIL-R-10509 style RN requirement: >= 10^9ohm
  • Failure-rate (%):
    • Resistance change (delta R): < 10^-8/h
Features
  • Din style:
    • Din-44061: 0204, 0207, 0309, 0411, 0617
  • MIL style:
    • MIL-R10509F (char. D&C)
    • RN-50, RN-55, RN-60, RN-65, RN-70
  • Power rating:
    • 1/8W, 1/4W, 1/2W, 1W, 2W (at 70 Celsius)
    • 1/20W, 1/10W, 1/8W, 1/4W, 1/2W (at 125 Celsius)
  • Resistance tolerance: +/-0.1%, +/-0.25%, +/-0.5%, +/-1%
  • Temp. coefficient: +/-25ppm/Celsius, +/-50ppm/Celsius, +/-100ppm/Celsius
  • Power derating curve: for resistor operated in ambient temperatures above 70 Celsius, power rating must be derated in accordance with curve below.
Style MIL Power rating (W) 70 Celsius Power rating (W) 125 Celsius Maximum working voltage 70 Celsius Maximum working voltage 125 Celsius Maximum overload voltage 70 Celsius Maximum overload voltage 125 Celsius Dimension (L)(mm) Dimension (D)(mm) Dimension (H)(mm) Dimension (d +/- 0.02)(mm)
MF-12 RN-50 0.125W 0.05W 200 150 400 300 3.2 +/- 0.2 1.6 +/- 0.2 28 +/- 0.1 0.48
MF-25 RN-55 0.25W 0.1W 250 200 500 400 6.0 +/- 0.5 2.3 +/- 0.3 28 +/- 1.0 0.60
MF-50 RN-60 0.5W 0.125W 350 250 700 500 9.0 +/- 0.5 3.0 +/- 0.5 28 +/- 1.0 0.70
MF-100 RN-65 1W 0.25W 500 300 1000 600 11 +/- 1.0 4.0 +/- 0.5 35 +/- 3.0 0.80
MF-200 RN-70 2W 0.5W 500 350 1000 700 15 +/- 1.0 5.0 +/- 0.5 35 +/- 3.0 0.80

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