RL1220 Datasheet Text
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CYNTEC CO., LTD.
DOCUMENTRLA00000 REVISION PAGE A4 1 OF 10
1/4W 1220 LOW RESISTNACE CHIP RESISTOR
1. Scope This specification applies to 2.0mm x 1.25mm size 1/4W, fixed metal film chip resistors rectangular type for use in electronic equipment. 2. Type Designation RL1220
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- (1) (2) (3) (4) Where (1) Series No. (2) Temperature coefficient of resistanceT.C.R. (3) Resistance value: refer to paragraph 4-1 For example-Three digits of number ( 0.1 R) R10 = 0.1Ω 1R0 = 1.0Ω Four digits of numberR < 0.1Ω R022 = 0.022Ω The “R” shall be used as a decimal point. (4) Resistance tolerance: refer to paragraph 4-1. 3. Construction and Physical Dimensions
L a a
Code Letter
W
Dimensions (mm) 1220 2.00 0.2 1.25 0.2 0.40 -0.1
+0.05
L W t t b a b
0.4 0.2 0.4 0.2
Figure 1. Construction and Dimensions ..
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CYNTEC CO., LTD.
4. Ratings 4.1 Specification Power Rating- Resistance Value Resistance Tolerance 1/4 W 22mΩ82mΩ 1%(F) , 5%(J)
DOCUMENTRLA00000 REVISION PAGE A4 2 OF 10
0.1Ω10Ω 1%(F) , 2%(G)
Note- : Power Rating is based on continuous full load operation at rated ambient temperature of 70°C. For resistors operated at ambient temperature in excess of 70°C, the maximum load shall be derated in accordance with the following curve.
% Rated dissipation ratio 100 50 0 -55 70 Ambient temperature 125 °C
Figure 2 Derating Curve 4.2 Rated Voltage The rated voltage shall be determined by the following expression.
= ×
Where VRated voltage (V) RNominal resistance value (Ω) PRated dissipation (W)
4.3 Operating and Storage Temperature Range -55 to...
