LEADED RESISTORS
Cement Resistors
Power Wirewound &
Axial Lead Type
Normal & Miniature Style [ PSP Series ]
DIMENSIONS Unit: mm
STYLE DIMENSION
Normal Miniature L W H ød
PSP400 - 20±1.0 6.4±0.3 6.4±0.3 0.8±0.02
PSP500 - 25±1.0 6.4±0.3 6.4±0.3 0.8±0.02
- PSP7WS 25±1.0 9.0±0.3 9.0±0.3 0.8±0.02
PSP700 - 38±1.0 6.4±0.3 6.4±0.3 0.8±0.02
PSP900 - 38±1.0 9.0±0.3 9.0±0.3 0.8±0.02
INTRODUCTION
The materials used and the construction
techniques ensure excellent flame resistance,
arc resistance and moisture resistance as well
as self-extinguishing capabilities. They will
withstand the most rigorous loading test.
As resistors in radio and television receivers,
hazardous conditions such as smoking and
redheat can be completely prevented by the
proper choice of power resistors.
FEATURES
Power Rating 4W, 5W, 7W, 9W
Resistance Tolerance ±5%, ±10%
T.C.R ±400ppm/°C
DERATING CURVE
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
Rated Load (%)
Ambient Temperature (°C)
300250200150100500-50
100
80
60
40
20
0
70 155 275 °C
ød
L33±3 33±3
H
W
Note:
71
Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value
ELECTRICAL CHARACTERISTICS
STYLE PSP400 PSP500 PSP7WS PSP700 PSP900
Power Rating at 70°C 4W 5W 7W 9W
Resistance Range 0.1 Ω - 2.2K Ω0.1 Ω - 2.5K Ω0.5 Ω - 3.9K Ω
Operating Temp. Range -55°C to +155°C
Temperature Coefcient ±400ppm/°C
Note: Special value is available on request
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec. ±2.0%+0.05 Ω
Voltage Proof IEC 60115-1 4.7 in V-block for 60 Sec., test voltage by type By type
Temperature Coefcient IEC 60115-1 4.8 -55°C to +155°C By type
Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >1,000M Ω
Solderability IEC 60115-1 4.17 235±5°C for 3±0.5 Sec. 95% Min. coverage
Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 5±0.5 Min. with ultrasonic No deterioration of
coatings and markings
Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads ≥2.5kg (24.5N)
Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) ±2.0%+0.05 Ω
Damp Heat Steady State IEC 60115-1 4.24 40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV ±5.0%+0.05 Ω
Endurance at 70°C IEC 60115-1 4.25 70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) ±5.0%+0.05 Ω
Temperature Cycling IEC 60115-1 4.19 -55°C Room Temp. +155°C Room Temp. (5 cycles) ±2.0%+0.05 Ω
Resistance to Soldering Heat IEC 60115-1 4.18 260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body ±1.0%+0.05 Ω