High Load & High-Frequency Resistors
(RY31A)A Perfect Choice for High Frequency Circuit Designs (RY31A) Preview
RY31A speciality MELF resistors combine the advanced pulse load capability and the suitability for RF applications in a single component.
They are the perfect choice in high frequency circuit designs where the parasitic inductance of regular, helical trimmed resistors can not be accepted, but where also pulse energies apply. Typical applications are in the fields of telecommunication equipment and industrial electronics.
RY31A - High Frequency Oxide Film, with the inner and outer surfaces coated with a special glass, features higher thermal resistance and larger electric power capacity for the compact volume. Unlike conventional wire wound type, the volumetric resistance will provide superior stability versus frequency and excellent durability against transient voltage. RY31A is suitable for the application with large current as well as high frequency circuit.
In very low resistance values, between 1.0 and 100 ohm, these are available in rated wattage 10W, 25W, 50W, 100W, and 150W packages.
The High-Frequency RY31A Series is 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.
Features :
- Special Oxide Film technology
- Speciality product for RF applications
- Low-inductance non-helical trimmed product
- Lead (Pb)-free and RoHS compliant
Applications :
- Telecommunication equipment
- Industrial electronics
RY31A - Electrical Characterisics (Unit: mm)
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| Rated power (W) |
T.C.R (PPM/°C) |
Resistance range (Ω) |
Tolerance (%) |
Pulse test voltage (KV) |
Ambient Temp. (70° CFull Power) |
D max. (mm) |
L max. (mm) |
d max. (mm) |
l max. (mm) |
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| 10 | (+20°C ~ +125°C) ±400 |
50 | ±5(J) ±10(K) |
3.2 | -55°C ~ +125°C |
Φ 15.1 | 77 | Φ 10.7 | 5±0.5 | |
| 75 | 4 | |||||||||
| 25 | 50 | 5 | Φ 25.1 | 121 | Φ17.9 | 10±1 | ||||
| 70 | 6.5 | |||||||||
| 50 | 50 | 7.5 | 162 | |||||||
| 75 | 8.7 | |||||||||
| 100 | 50 | 11 | Φ 35.1 | 202 | Φ23.1 | 12±1 | ||||
| 75 | 12.5 | |||||||||
| 150 | 50 | 12.5 | 302 | 20+2 20-1 |
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| 75 | 12.5 | |||||||||
Note: Resistance rage is 1~100Ω. 
The resistors with the standard resistance values as showed as above. will be supplied with a shorter delivery.
High Voltage Resistor RY31A - Order Codes
| RY31A | 10W | 50R | K | ||||||||||||||||||||||||||
| 1 | 2 | 3 | 4 | ||||||||||||||||||||||||||
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