QCR electronic component FKN 1 watt 500 ohm wirewound fusible resistor
with non-flame encapsulant
QCR ELECTRIC | Fusible Wirewound resistors |
Profile No. | YZX-SR-36-1A | Issuing Date | 2015-7-28 |
Edition: | B1 | Page: | 4/10 |
Specification details
1.Feartures:
l Ceramic core, Insulative coated Material.
l Fireproof inorganic construction
l Cooper lead, Axial or radial leaded.
l Excellent fusibility, small size.
l Pure tin plating provides compatibility with lead (Pb)-free and lead containing soldering processes.
l Certificate: RoHs, CQC, SGS
l Application: efficient light, power charger, power adapter. etc general purpose.
2. Dimension:
Rated Voltage | Dimension(MM) | Resistance Range | Dielectric Withstanding Voltage |
H±0.5 | D±0.5 | H1±0.5 | d±0.02 |
1/2W | 10 | 3.5 | 26 | 0.5 | 0.1~30Ω | 350V |
1W | 12 | 4 | 33 | 0.6 | 0.1~50Ω | 500V |
2w | 15 | 5 | 33 | 0.7 | 0.1~200Ω | 500V |
3w | 17 | 6 | 35 | 0.7 | 0.1~470Ω | 500V |
5w | 25 | 8 | 38 | 0.8 | 0.1~1kΩ | 500V |
7w | 30 | 8 | 38 | 0.8 | 0.1~2kΩ | 500V |
10w | 51 | 8 | 38 | 0.8 | 0.1~3kΩ | 500V |
3. Mold Styles:
Tape F FK M MK
QCR ELECTRIC | Fusible Wirewound resistors |
Profile No. | YZX-SR-36-1A | Issuing Date | 2015-7-28 |
Edition: | B1 | Page: | 4/10 |
4.Technology description:
Model | Resistance(R) | Resistance Tolerance | Operating Temp. (℃) |
1/2W 10R | 10 | J | See photo of reduced power consumption curve. |
1W 5R | 5 | J | See photo of reduced power consumption curve. |
5.Current surge features and Fusible features
5.1 Current surge features
Referent to IEC6100-4-5 standard, connected resistors to SG-5006G Lightning test instrument, and
used positive and negative voltage to impact calculatedly 10 times, the resistors are not allowed to
break off. The voltage of lightning can be ordered as customer’s requirement.
√
QCR ELECTRIC | Fusible Wirewound resistors |
Profile No. | YZX-SR-36-1A | Issuing Date | 2015-7-28 |
Edition: | B1 | Page: | 4/10 |
5.2 Fusible features:
When the resistors work with 25 times rated power, the fused time is less than 60 seconds,
and with 64 times, less than 30 seconds.
Formulation of Fused current I :I = √25*P*R /R
A figure 25 represents times of rated power
Letter P represents resistors rated power
Letter R represents resistance value.
Note:The fused time can be ordered as customer’s requirement
6. Electrical features(All technology data was obtained in nature environment, except special declaring)
6.1 Lead strength
Puling:10N,10s;
Winding:5N,±90°,double times,at half of lead;
Reverse:180°,double times,the other half of lead.
No visible damage;
ΔR≤±(1%R+0.05Ω)
6.2 Tin soldering ability
Weld groove method; 350℃±10℃; 3.5s±0.5s.
No visible damage, marks are clear;
ΔR≤±(1%R+0.05Ω)
6.3 Steady Temperature & Humidity
+40℃;93±%RH;21d
No visible damage, marks are clear;
ΔR≤±(5%R+0.05Ω);
Axial lead and insulative coated resistance:
100VDC,1min;
RI≥100MΩ
QCR ELECTRIC | Fusible Wirewound resistors |
Profile No. | YZX-SR-36-1A | Issuing Date | 2015-7-28 |
Edition: | B1 | Page: | 4/10 |
6.4 Unexpected Load test
Test was done according to the requirement of GB5729 terms 4.26.
Different group of resistors tested was loaded as 2, 3, 5 times of rated watts, the coated silk didn’t
flame until the resistors broken off.
7. Tape size and Package
Specification | Size(mm) |
W | P | L1-L2 | T | Z | t | S |
1/2W 10R J | 52±2 | 5±1 | <1.0 | 6±1 | <1.2 | >3.2 | <0.8 |
1W 5R J | 52±2 | 5±1 | <1.0 | 6±1 | <1.2 | >3.2 | <0.8 |
8. Attention:
1. During the resistor’s fusing testing, Inspecting instrument should nip lead at the length of 2/3 outer
from the body to prevent heat loss.
2. The surface of the resistor should be ensured to be clean during the test.
