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Carbon Film Resistors (RD)
Fusible Film Resistors (RF)
Cement Resistors (RG)
Metal Glaze Resistors (RM)
Metal Film Resistors (RN)
Metal Oxide Resistors (RS)
Wire Wound Resistors (RW)
Insulated 0Ω Resistors (RZ)
Metal Plate Resistors (MPC)
Anti-burst Fusible Resistor
(RFB)


  Cement Resistors (RG)

1. Scope of the coverage:
 This specification is pertinent to the application of cement resistors [designated as (RGW), (RGF)].
2 .Temperature range of the application:
 -55℃ ~ +155℃。
3. Type:
 Two types of cement resistors are available : wire wound cement resistor (RGW) and metal oxide
 film cement resistor (RGF)
4.Marking and illustration: ref. To Fig.1
 
 
5.Dimension, voltage, resistance range: listed in the following Table (Fig.1 - Fig.6) Unit: mm
5.1 Z Type

Rated

Power

(W)

Type

Resistance

Range(Ω)

Highest Working

(V)

Highest Overload

(V)

Dimension (ref. to Fig.1)
J ( ±5%)
W
L
HI
H2
P
3
RGW
0.1~100Ω
10±1
25±1.5
10±1

10.5±1.0

or

15±1.0

9.5±1.5
RGF
101Ω~39KΩ
350
1000
5
RGW
0.1~100Ω
10±1
28±1.5
10±1
15±1.5
RGF
101Ω~50KΩ
350
1000
7
RGW
0.1~100Ω
10±1
36±1.5
10±1
20±1.5
RGF
101Ω~100KΩ
500
1500
10
RGW
0.1~100Ω
10±1
48±1.5
10±1
32±1.5
RGF
101Ω~100KΩ
750
1500
15
RGW
0.1~100Ω
12.5±1
48±1.5
12±1
32±1.5
RGF
101Ω~100KΩ
1000
1500
20~25
RGW
0.1~100Ω
15±1
60±1.5
13±1
42±1.5
RGF
101Ω~100KΩ
1000
1500
 
5.2 P Type (Fig.2 Unit: mm)
Rated Power
W
H
L
ι
2W
7 ±1.0
7 ±1.0
18 ±1.5
0.8 ±0.05
23 ±3
3W
8 ±1.0
8 ±1.0
22 ±1.5
0.8 ±0.05
35 ±3
5W
10 ±1.0
9 ±1.0
22 ±1.5
0.8 ±0.05
35 ±3
7W
10 ±1.0
9 ±1.0
35 ±1.5
0.8 ±0.05
35 ±3
10W
10 ±1.0
9 ±1.0
48 ±1.5
0.8 ±0.05
35 ±3
15W
12.5 ±1.0
11.5 ±1.0
48 ±1.5
0.8 ±0.05
35 ±3
20W~25W
14 ±1.0
13.5 ±1.0
60 ±1.5
0.8 ±0.05
35 ±3
 
5.3 M Type (Fig.3 Unit: mm)
Rated Power
H
W
S
P
2W
20 ±1.5
11 ±1.0
7 ±1.0
0.8 ±0.05
3W
25 ±1.5
12 ±1.0
8 ±1.0
0.8 ±0.05
5W
25 ±1.5
13 ±1.0
9 ±1.0
0.8 ±0.05
7W
39 ±1.5
13 ±1.0
9 ±1.0
0.8 ±0.05
10W
51 ±1.5
13 ±1.0
9 ±1.0
0.8 ±0.05
15W
35 ±1.5
16 ±1.0
12 ±1.0
0.8 ±0.05
 
5.4 T Type (Fig.4 Unit: mm)
Rated Power
W
H
L
t
5W
10 ±1.0
9 ±1.0
22 ±1.5
1.5 ±0.5
0.8 ±0.05
7W
10 ±1.0
9 ±1.0
35 ±1.5
3.0 ±0.5
0.8 ±0.05
10W
10 ±1.0
9 ±1.0
48 ±1.5
3.0 ±0.5
0.8 ±0.05
 
5.5 S Type (Fig.5 Unit: mm)
Rated Power
L
H
HI
K
h
7W
46 ±1.5
28 ±0.5
7.0 ±0.5
6.5 ±0.5
4.0±0.3
10W
60 ±1.5
28 ±0.5
7.0 ±0.5
20 ±0.5
4.0±0.3
 
5.6 H Type (Fig.6 Unit: mm)

Rated

Power

W
H
L
P
HI
D
P1
P2
10W
10.0±1
10.0±1
48.0±1.5
32.0±1
21.0±1
5.0±0.5
2.5±0.2
1.7±0.2
15W
12.5±1
11.5±1
48.0±1.5
32.0±1
21.0±1
5.0±0.5
2.5±0.2
1.7±0.2
20W
14.5±1
13.5±1
60.0±1.5
42.0±1
24.0±1
6.0±0.5
3.0±0.2
2.5±0.2
30W
19.0±1
19.0±1
75.0±1.5
55.0±1
31.0±1
7.5±0.5
.
.
40W
19.0±1
19.0±1
90.0±1.5
67.0±1
31.0±1
7.5±0.5
.
.
 
6. Characteristics of electrical performance
 6.1 Rated power
 The rated power indicates the maximum power the resistor can endure continuously when the
 ambient temperature is equal to or lower than 70℃. When the ambient temperature is higher than
 70℃, the rated power of the resistor is determined by the derating curve described in the following
 figure.
 
 6.2 Rated voltage
 The rated voltage of a resistor is either a continuous DC voltage or an AC rms voltage which can be
 calculated by the following formula. If the calculated rated voltage is higher than the highest
 working voltage then the highest working voltage should be used as the rated voltage.
  P: Rated power(W), R: Nominal resistance(Ω), E: Rated voltage(V)
 
 6.3 Insulation resistance (Ref. JIS C5202 5.6)
 Equipment: Insulation resistance tester
 The body of the resistor is wrapped around by the aluminum foil without extending beyond the
 resistor body. Clap one electrode on the aluminum foil and the other electrode on the lead wire.
 Apply 500V from the tester for 1 min. and the measured resistance value should be larger than
 100MW.
 
 6.4 Dielectric strength (Ref. JIS C5202 5.7)
 Equipment: Dielectric strength tester
 The body of the resistor is wrapped around by the aluminum foil without extending beyond the
 resistor body. Clap one electrode on the aluminum foil and the other electrode on the lead wire.
 Apply 1,000V from the tester to the resistor for 1 min.. No flash-over, burning or breakdown should
 be observed.
 
 6.5 Short time overload (SOL) (Ref. JIS C5202 5.5)
 Equipment: S.O.L. tester.
 Apply voltage of to the resistor for 5 sec., After the test, stabilize the resistor at room
 temperature for 30 min. then measure its resistance. Compare the resistance before and after the
 test. The acceptable change of the resistance is: ±(2%+0.1Ω). The highest applied overload
 voltage is listed in Table-1.
 
7. Environmental tests
 7.1 Load life test (Endurance with rated load) (Ref. JIS C5202 7.10)
 Equipment: High temperature chamber and DC power supply
 The resistors are put in a fixture where no interference will be allowed. Put the fixture in a 70±3℃
 chamber and apply rated voltage with a cycle of 90 min. ON and 30 min. OFF for 1000+48-0 hours.
 After 240, 480, 720 and 1,000 hours, the resistors are taken out and stabilize at room temperature
 for 30 min. and then the resistance is measured. Upon each step of resistance measurement, the
 change of the resistance should not exceed ±(5%+0.1Ω) and the appearance should show no
 remarkable abnormality and legibility of marking.
 
 7.2 Resistance to damp heat (Ref. To JIS C5202 7.2)
 Equipment: Constant temperature and humidity chamber
 The resistors are put in a 40±2℃ chamber with RH=90~95% for 56 days. After the test, take the
 resistors out and stabilize in room temperature for 1 - 4 hour. Measure the resistance. The
 acceptable change of resistance should not exceed ±( 3%+0.1Ω) and the appearance should
 show no remarkable abnormality and legibility of marking.
 
 7.3 Temperature coefficient (TCR) (Ref. JIS C5202 5.2)
 Equipment: High temperature chamber
 Measure the resistance at room temperature. Put the resistor in a chamber with the temperature of
 RT+100℃ for 30 - 45 min. to stabilize. Measure the resistance again. Compare the resistance at
 these two temperatures with the following equation and the acceptable value is:
 R≦1Ω:±600 PPM/℃. or R>1Ω:±350 PPM/℃.
 
 R = Resistance at T T = RT + 100℃ Ro = Resistance at To  To =room temperature
 
 7.4 Resistance to heat (Ref. JIS C5202 7.2)
 Equipment: High temperature chamber
 Measure the resistance at room temperature. Put the resistors to 155℃ chamber for 1,000 hours.
 Take resistors out and stabilize at room temperature for 1 hour. Measure the resistance value. The
 change of the resistance before and after the test should be less than ±(5%+0.1Ω). The
 appearance should show no remarkable abnormality and legibility of marking.
 
 7.5 Temperature cycling (Ref. JIS C5202 7.4)
 Equipment: High temperature chamber, low temperature chamber
 Measure the resistance before the test. Put the resistor to -55℃ chamber for 30 min. then take it
 out at room temperature for 2 to 3 min.. Put the resistor to +155 ℃chamber for 30 min. then take it
 out at room temperature for 2 to 3 min. This completes a cycle. Repeat the cycle 5 times. Put
 resistors at room temperature for 90 min. and then measure the resistance. Compare the
 resistance before and after test. The acceptable change of resistance is ±(1%+0.05Ω). The
 appearance should show no remarkable abnormality and legibility of marking.
 
8.Mechanical performance
 8.1 Resistance to soldering heat (Ref. JIS C5202 6.4)
 Equipment: Solder bath
 Measure the resistance before the test. Immerse part of the lead wire which is 4±0.8mm away from
 the body to the flux for 5 - 10 sec. Take the resistor out and immerse resistors in the solder bath of
 350±10℃ for 3.5±0.5 sec.. Stabilize at room temperature for 1 hour and then measure the
 resistance value. Compare the resistance values before and after the test, The acceptable change
 is ±(1%+0.05Ω)
 
 8.2 Solderability (Ref. JIS C5202 6.5)
 Equipment: Solder bath
 Immerse part of the lead wire which is 4±0.8mm away from the body to the flux for 5 - 10 sec. Take
 the resistor out and immerse resistors in the solder bath of 245±5℃ for 2 sec.. Take the resistor
 out and inspect the lead wire visually. The acceptable level is the coverage of the new solder to be
 95%. The composition of the solder bath is 99.7% tin and 0.3% Cu.
 
 8.3 Robustness of terminals (Ref. JIS C5202 6.1)
 8.3.1 Tensile strength of termination
 Equipment: Weight gauge
 Fixed the resistor and apply gradually along the terminal 4Kg of force for 30 sec., The lead wire
 should not break or detached from the resistor and the change of the resistance should be less
 than ±(1%+0.05Ω).
 

 

 

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