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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 resistor is more complex than flat-chip resistor,
MELF resistor has its own advantages over flat-chip type. TOKEN full line of Pulse MELF RGM resistors meet RoHS Directives. Pulse 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. Token offers competitive prices and are widely used Pulse MELF resistor 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 electronics, like protector of eliminate electrostatic and thunder lightning. |
| Pulse Melf Resistor 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. |
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| Melf Pulse Resistor Quick Reference Data |
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| 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 |
| RGM16M | 1MR | J | T |
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| Product type | Resistance Value (Ω) | Resistance Tolerance (%) | Packaging |
| RGM72 RGM73 RGM74 RGM16M RGM17M RGM18M |
50k ~ 200M 50k ~ 200M 50k ~ 1G 50k ~ 1G 100k ~ 2G 50k ~ 2G |
D (±0.5) F (±1) J (±5.0) K (±10) |
T (Taping Reel) P (Bulk) |
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