MELF RESISTORS

Metal Glaze Film Power Melf Resistors

RGM

MELF is the abbreviation for Metal Electrode Leadless Face - a leadless cylindrical component that is metallized on two ends. It is designed majorly as a SMD component. Since manufacturing process of MELF is more complex than flat-chip resistor, MELF has its own advantages over flat-chip type.

Power MELF RGM series are made by metal glaze film coating on the surface of a cylindrical substrate with excellent characteristics and stable at even high resistance range. Tokenchina offers competitive prices and are widely used in the power source protector like fluorescent's inverter, and starting resistor for Mercury Lamp. For high value resistance application, are widely used in computer and power electronics, like protector of eliminate electrostatic and thunder lightning.

The power series is lead-free and RoHS compliant. Detailed specifications, both mechanical and electrical, please contact our sales representative for more information.

MELF Power Resistors

Features

  • Tolerance up to ±0.5%.
  • High pulse loading capability.
  • Wide resistance range: 50kΩ to 1GΩ.
  • Advanced metal glaze film technology.
  • Larger power dissipation under request.
  • Power dissipation rating at 70°C up to 3W.
  • Maximum working voltage over 10000V.
  • Small size.

Characteristics & Dimensions (mm) - Power Melf RGM

Type RGM72 RGM73 RGM74 RGM16M RGM17M RGM18M
Resistance range (Ω) 50k ~ 200M 50k ~ 200M 50k ~ 1G 50k ~ 1G 100k ~ 2G 50k ~ 2G
Resistance Tolerance D(±0.5%);   F(±1%);   J(±5.0%);   K(±10%)
Temperature coefficient ±100ppm/°C;   ±200ppm/°C
Rated dissipation (W)   P70 0.125 0.25 0.50 1.0 2.0 3.0
Operating voltage (V)   Umax 400 800 1500 3000 6000 10000
Short time over load voltage (V) 800 1500 3000 6000 10000 20000
Operating Temperature range -55°C ~ 155°C
Endurance,
Max, resistance change at P70,
ΔR/R max., after 1000h		 50KΩ ~ 10MΩ 50KΩ ~ 10MΩ 50KΩ ~ 22MΩ 50KΩ ~ 22MΩ 50KΩ ~ 22MΩ 50KΩ ~ 22MΩ
≤1.50%
Insulation voltage >500V
Insulation resistance >1GΩ
Dimension Max. (mm) L 2.2 3.5 5.5 5.9 8.6 11.6
L1 1.0 1.6 3.5 3.9 6.2 8.8
D 1.3 1.3 2.1 2.1 3.1 3.6
K 0.4 0.8 1.0 1.2 1.5 1.6
D1 D+0/D-0.15 D+0/D-0.25 D+0/D-0.5 D+0/D-0.5 D+0/D-0.5 D+0/D-0.5
Soldering bath
(recommended) (mm)		 S 1.0 1.6 2.6 2.8 5.6 8.2
W 2.0 2.5 2.5 2.8 3.2 4.0
H 2.0 2.5 2.5 2.8 3.8 4.5

How to Order - Power Melf Resistors RGM

RGM16M 1MR J T
Product Type
RGM72
RGM73
RGM74
RGM16M
RGM17M
RGM18M
Resistance Value (Ω)
50k ~ 200M
50k ~ 200M
50k ~ 1G
50k ~ 1G
100k ~ 2G
50k ~ 2G
Resistance Tolerance (%)
D ±0.5
F ±1
J ±5.0
K ±10
Packaging
T Taping Reel
P Bulk

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RGM series - Metal Glaze Film Power MELF Resistors