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RESISTOR CATEGORIES > CEMENT WIREWOUND RESISTORS > SQM Series
SQM Series
SQM Series Cement Wire Wound Resistors

DIMENSIONS (mm) :

STYLE DIMENSION (mm)
SQM Normal Mini. Normal Mini. Normal Mini. φd
L W S
2W 20 ?.5 ----- 11 ?.0 ----- 7.0 ?.0 ----- 0.8 ?.05
3W 25 ?.5 20 ?.5 12 ?.0 11 ?.0 8.0 ?.0 7.0 ?.0 0.8 ?.05
5W 25 ?.5 25 ?.5 13 ?.0 12 ?.0 9.0 ?.0 8.0 ?.0 0.8 ?.05
7W 39 ?.5 25 ?.5 13 ?.0 13 ?.0 9.0 ?.0 9.0 ?.0 0.8 ?.05
10W 51 ?.5 35 ?.5 13 ?.0 16 ?.0 10 ?.0 12 ?.0 0.8 ?.05

ELECTRICAL CHARACTERISTICS:

Style Power Rating 70°C SQM-2W SQM-3W SQM-5W SQM-7W SQM-10W
SQM-3WS SQM-5WS SQM-7WS SQM-10WS -----
Operating Temp. Range -55°C ~ +155°C
Max. Working Voltage 250V 350V 350V 500V 500V
Max. Overload Voltage 500V 700V 700V 1000V 1000V
Dielectric Withstanding Voltage (AC) 500V 700V 700V 1000V 1000V
Value Range ?% (Ceramic core) 0.1 ~100 Ω 0.1 ~100 Ω 0.1 ~500 Ω 0.1 ~500 Ω 0.1 ~500 Ω
Value Range ?% (Metal Oxide Film) 101 ~100K 101 ~100K 510 ~100K 510 ~100K 510 ~100K
Temp. Coefficient ?00ppm/°C
* a. Standard resistance is as the above list, below or over this resistance is on request.
   b. Value for Non-Inductive type up to 50 Ω only.
ENVIRONMENTAL CHARACTERISTICS :
PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload JIS-C-5202 5.5 : 2.5 times RCWV for 5 seconds ?2%+0.05 Ω)
Dielectric Withstanding V. JIS-C-5202 5.7 : in V-Block for 60 seconds By Type
Temperature Coefficient JIS-C-5202 5.2 : -55°C ~+155°C MAX. 300ppm/ °C
Insulation Resistance JIS-C-5202 5.6 : in V-Block ≥1000 M Ω
Solderability JIS-C-5202 6.5 : 235°C for 5 ?.5 seconds 95% min. coverage
Resistance to Solvent JIS-C-5202 6.9 : Trichroethance for 1 min. with ultrasonic no deterioration
Terminal Strength Direct load for 10 sec. In the direction of the terminal leads ≥2.5KG/24.5N
Pulse Overload JIS-C-5202 5.8 : 4 time RCWV 10000 cycles(1 sec.on, 25 sec.off) ?2%+0.05 Ω)
Load Life in Humidity JIS-C-5202 7.9 : 40 ?°C, 90~95% RH at RCWV for 1000 hrs
(1.5hrs. on, 0.5 hrs. off) 		?5%+0.05 Ω)
Load Life JIS-C-5202 7.10 : 70°C at RCWV for 1000hrs (1.5hrs.on, 0.5hrs.off) ?5%+0.05 Ω)
Temperature Cycling JIS-C-5202 7.4 : 65°C→ room temp.→150 °C→ room temp. for 5 cycles. ?2%+0.05 Ω)
Soldering Heat JIS-C-5202 6.4 : 350 ?0°C for 3 ?.5 seconds ?1%+0.05 Ω)
WILDEX CORPORATION
 6F, NO.151, Sec.3, Beishen Rd, Shenkeng Dist, New Taipei City, Taiwan.
TEL:886-2-26641909 FAX:886-2-26640242 wildex@wildexco.com、wildex@ms26.hinet.net