Non-Inductive (RMCA, RMCB) Enhanced Performance for High Voltage Ignition Applications.
The RMCA, RMCB Series MELF type of fixed ceramic resistors from Direct Electronics offers automotive designers a compact solution for applications involving high voltages, surges, high peak power, or high-energy pulses. They offer enhanced performance in R-C snubber circuits, high voltage power supplies, and inrush limiters.
Direct's RMCA, RMCB series now offers the industry a direct replacement carbon composition resistor based on a bulk resistive element comprising carbon in a ceramic filler. Due to the need for higher peak voltages, the RMCA, RMCB range is perfect for vehicle ignition system applications.
The RMCA, RMCB Voltage Resistors conform to RoHS compliant and lead free. For customed designs, tighter tolerances, non-standard technical requirements, or custom special applications, please contact our sales for more information.
Download complete PDF High Voltage Ceramic Composition Resistors (RMCA, RMCB).
Ceramic Composition Resistor Construction :
Replacement Carbon-Composition Resistors :
|General Specifications (RMCA, RMCB)|
|Model||Style||Rated Wattage||Dimensions (Unit: mm)|
|RMC||A||1||7 ± 1.5||4.0 ± 0.4|
|9 ± 1.5||4.0 ± 0.4|
|10 ± 1.5||4.0 ± 0.4|
|B||11 ± 1.5||4.6 ± 0.5|
|RMC||A||2||18 ± 1.5||4.0 ± 0.4|
|B||19 ± 1.5||4.6 ± 0.5|
|RMC||A||3||24 ± 2.0||4.0 ± 0.4|
|B||25 ± 2.0||4.6 ± 0.5|
|RMC||A||5||24 ± 2.0||7.0 ± 0.5|
|B||25 ± 2.0||7.6 ± 0.5|
|Electrical Characterisics (RMCA, RMCB)|
|Power Rating at 25°C (W)||1||2||3||5|
|Operating Temp. Range (°C)||-40 ~ 155|
|Resistance Tolerance||K(±10%), M(±20%)|
|Resistance Range (Ω)||470 ~ 33K||1K ~ 56K||1K ~ 100K||470 ~ 33K|
|Max. Working Voltage (V)||300||350||400||500|
|T.C.R (PPM/°C)||-40°C ~ 25°C||-750 ~ 3300||-750 ~ 3300||-750 ~ 3300||-750 ~ 3300|
|25°C ~ 155°C||-750 ~ 2600||-750 ~ 2600||-750 ~ 2600||-750 ~ 2600|
|Max. Pulse Voltage (KV)||8||15||20||25|
|Moisture Resistance (%)||10||10||10||10|
Chemically inert and thermally stable, the resistors are inherently non-inductive because of their bulk ceramic construction, which allows energy and power to be uniformly distributed through the entire ceramic resistor body with no film or wire to fail.
The bulk ceramic material also allows simple efficient resistor designs that enable the designer to minimize the resistor package size while providing the required performance and reliability.
|Order Codes (RMCA, RMCB)|