I. Features
- Good heat-durability, Low temperature coefficient, low noise, high load power, high insulating capacity, nonflammability.
- Operating ambient temperature:-55℃~+275℃
II. Dimension and Structure
|
Type |
Dimension(mm) |
Resistance Range |
Forming Type |
|
Power |
H±1 |
W±1 |
S±1 |
Φ±0.05 |
Wire-wound |
Oxide rod |
|
SQM2W |
20.5 |
11 |
7 |
0.8 |
0.1Ω～270Ω |
110Ω～22KΩ |
M |
|
SQM3W |
25 |
12 |
8 |
0.8 |
0.1Ω～680Ω |
130Ω～33KΩ |
M |
|
SQM5W |
25 |
13 |
10 |
0.8 |
0.1Ω～580Ω |
200Ω～50KΩ |
M |
|
SQM7W |
39 |
13 |
10 |
0.8 |
0.1Ω～1.2KΩ |
240Ω～50KΩ |
M |
|
SQM10W |
51 |
13 |
10 |
0.8 |
0.1Ω～1.8KΩ |
300Ω～50KΩ |
M | |
III. Derating Curve and Surface Temperature Rise Curve
IV. Electrical Characteristics
|
Item |
Performance requirement |
Test methods |
|
Temperature Coefficient: |
Wire coiling:
-300ppm/℃≤ a ≤+300ppm/℃
Oxide rod:
-350ppm/℃≤ a ≤+350ppm/℃ |
JIS5202-5.2
-55℃ to +155℃
T.C.R=(R2-R1)×1 / R1 ×(T2-T1)(PPM/℃)
R1:Resistance value at room temperature(T1);
R2:Resistance value at room temperature+100℃(T2) |
|
Short time overload: |
ΔR≤±（2% R0+0.1Ω) |
JIS5202-5.5
2.5times RCWV for 5 seconds |
|
Resistance to soldering heat: |
ΔR≤ ±（1%R0+0.05Ω) |
JIS5202-6.4
350℃±10℃ for3±0.5 seconds |
|
Solderability: |
The area of soldering is over 95% |
JIS5202-6.5
235℃for5±0.5 seconds |
|
Temperature cycling: |
ΔR≤± (5% R0+0.1Ω) |
JIS5202-7.4
→65℃→room temp. →150℃→room temp.
for 5 cycles |
|
Load life in moisture: |
ΔR≤±（5% R0+0.1Ω) |
JIS5202-7.9
40±2℃,90～95% RH at RCWV for 1000 hrs.
(1.5 hrs. on, 0.5 hrs. off) |
|
Nonflammability: |
No visible flame |
SJ3272-4.2 | |
