Product name: RX27-3B wire wound resistors in ceramic casing
Type: RX27-3B
Product introduction: RX27 series wire wound resistors in ceramic casing have many excellences of firm structure, high machine intensity etc. For use the ceramic casing, it has the ability of resistance to voltage, inflammability, high secure, the product has the characteristic of low inductance or no inductance, high precision, no noise, low temperature coefficient, high stability, high frequency etc.
Purpose: wire wound resistor in ceramic casing is used in circuit of automatic control system, frequency conversion control system, power supply, top grade acoustics.
■ Electrical and Mechanical specifications
|
Characteristics |
Limits |
Test methods |
|
|
resistance and resistance tolerance |
10Ω≤R±5%（J） , 10Ω>R±10%（K） |
JIS-C-5202 5-1 |
|
|
Power rating load |
≤275℃
the highest temperature on the surface |
JIS-C-5202 5-4 |
|
|
Short-time overload |
ΔR≤±（2%R+0.05Ω）
no evidence of mechanical damage |
JIS-C-5202 5-5 1000% rated power 5 seconds |
|
|
Insulation resistance |
R≥20MΩ 1min |
JIS-C-5202 5-6 DC500V |
|
|
Dielectric withstanding voltage |
no evidence of mechanical damage or insulation breakdown |
JIS-C-5202 5-7
AC:1500V 1minute |
|
|
Temperature coefficient |
±260PPM/℃ |
JIS-C-5202 5-2 b |
|
|
Terminal strength |
not loosely and no evidence of mechanical damage |
JIS-C-5202 6-1(2) |
|
|
Resistor strength |
no evidence of mechanical damage |
JIS-C-5202 6-2 |
|
|
Vibration |
ΔR≤±（0.1%R+0.05Ω）
no evidence of mechanical damage |
JIS-C-5202 6-3
1.5mm 10~55 Hz/ 1Minute |
|
|
Solderability |
75% coverage min. |
JIS-C-5202 6-5
230℃ 5 seconds |
|
■ Environmental specifications
|
Characteristics |
Limits |
Test methods |
|
|
Heat resistance |
no deterioration of protective coatings or markings |
JIS-C-5202 7-2
350℃ 2hours |
|
|
Thermal shock |
ΔR≤±（2%R+0.05Ω）
no evidence of mechanical damage |
JIS-C-5202 7-3
After 30minutes rating load , 55℃ 15mintues |
|
|
Humidity |
ΔR≤±（3%R+0.05Ω）, ≥2.5MΩ
no deterioration of protective coatings or markings |
JIS-C-5202 7-5 DC100 40℃ 95%RH 500hours |
|
|
Humidity Load life |
ΔR≤±（5%R±0.05Ω）
no evidence of mechanical damage
no deterioration of protective coatings or markings |
JIS-C-5202 7-10 100% rated power load 90 min ON 30 min OFF 500hours |
|
■ Specification
Configuration (m/m)
RX27-3B type
|
Power
(W) |
Dimensions（mm） |
Resistance RangeΩ |
|
L |
S |
|
12 |
48±1.5 |
32.5±1.0 |
0.5-2.7K |
|
16 |
63.5±1.5 |
50±1.0 |
0.75-3.3K |
■ Power Derating Curve
|
environment temperature |
0~70℃ |
above 70℃ |
|
power derating |
100% |
see the fig. |
|
℃
environment temperature |
（Power） |
|
70℃ |
2 |
3 |
5 |
7 |
10 |
12 |
16 |
20 |
24 |
32 |
|
25℃ |
2 |
3 |
5 |
7 |
10 |
15 |
20 |
25 |
30 |
40 |
■ classified standard
● how to order
