Resistors
Radial Ceramic Case Resistors
Ceramic Case Resistors
Wirewound // Metal Oxide
Wirewound Metal
Resistors
Radial Ceramic Case
Oxide
Wirewound / Metal Oxide
SQM Series
SQM Series
2 to 10 watts
SQM
to
CVF / CVW Series
2
/
10 watts
Resistance 0R1 to 200K
Resistance 0R1 to 200K
2 to 10 watts
High overload capability
High overload capability
Resistance 0R1 to 200K
Flameproof case
Flameproof case
High overload capability
Small PCB footprint
Small PCB footprint
Flameproof case
RoHS compliant
Small PCB footprint
RoHS compliant
RoHS compliant
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
SQM2 / CV-2
SQM2 / CV-2 SQM3 / CV-3 SQM5 / CV-5 SQM7 / CV-7 SQM10 / CV-10
SQM3 / CV-3 SQM5 / CV-5
SQM7 / CV-7 SQM10 / CV-10
watts
22
33
55
7 7
10 10
Power rating at 70°C
watts
Power rating at 70°C
Resistance range – wirewound (CVW)
0R1 - - 27R
0R1 - 39R
0R1 - 47R
0R1 - 680R
ohms
Resistance range – wirewound (CVW)
0R1 27R
0R1 - 39R
0R1 - 47R
0R1 - 680R 0R1 - 910R
0R1 - 910R
/
ohms
/CV-2
CV-2
Resistance range – oxide (CVF)
ohms
43R
– –
56K
51R
–
100K
Resistance range – oxide (CVF)
ohms 30R
– –
33K
30R 33K
43R 56K
51R
–
100K 750R - 200K
750R - 200K 1K0 - 200K
1K0 - 200K
Limiting element voltage
volts dc or ac rms
150
300
350
500
750
Limiting element voltage
volts dc or ac rms
150
300
350
500
750
Thermal impedance
50
45
30
2828
23 23
°C /watt
Thermal impedance
50
45
30
°C /watt
Isolation voltage
volts
1000
Isolation voltage
volts
1000
TCR
TCR
Resistance Tolerance
Resistance Tolerance
ppm/°C
ppm/°C
%
%
<20R: ± ± 400,
≥20R:
± 350
<20R: 400,
≥20R:
± 350
± 5 5 1010
± ±±
E24
E24
-55 toto +155ºC
-55 +155ºC
Electrical Data
Electrical Data
Standard Values
Standard Values
Ambient temperature range
Ambient temperature range
°C
°C
Physical Data
(all dimensions in mm, weights ining)g)
Physical Data
(all dimensions in mm, weights
Type
Type
SQM10 // CV-10
SQM10 CV-10
L
PP
d d Weight
B
EE
FF
W
D
L
B
W
D
Weight
1.0
± 1.0 ± 1.0 ± 1.0 ±±1.0 ±±1.0 ±± 1.0 ± ± 1.0 ± 0.05 Nom.
1.0
1.0
1.0
± 1.0 ± 1.0 ± 1.0
± 0.05 Nom.
4.5
3.0
3.0
SQM2 // CV-2
20 11.5 7.5
55
0.7
4.3
4.5
3.0
3.0
SQM2 CV-2
20 11.5
7.5
0.7
4.3
SQM3 // CV-3
25 12.5 8.5
55
0.7
5.6
4.5 4.0
4.0 4.0
4.0
SQM3 CV-3
25 12.5
8.5 4.5
0.7
5.6
SQM5 // CV-5
25 12.5
9
55
0.8
6.3
5.0
3.5
3.5
SQM5 CV-5
25 12.5
9
0.8
6.3
5.0
3.5
3.5
SQM7 // CV-7
38 12.5
9
55
0.8
5.0
SQM7 CV-7
38 12.5
9
0.8 10.7
10.7
5.0 2.75 5.0
2.75 5.0
50
50
12.5
12.5
9
9
4.25 2.75 5.0
4.25 2.75 5.0
55
0.8
0.8
13.4
13.4
BB
WW
DD
Marked side
Marked side
L L
d d
F F
P P
5±1
5±1
E E
A high purity ceramic rod, with force fit end caps onto which isis wound a wire element: or a deposited metal oxide film
A high purity ceramic rod, with force fit end caps onto which wound a wire element: or a deposited metal oxide film
(depending on value). The element is fitted into aaceramic case with fireproof insulation cement.
(depending on value). The element is fitted into ceramic case with fireproof insulation cement.
Construction
Construction
General Note
General Note
Welwyn Components
product specification without notice or liability.
General
Components reserves the right to make changes inin product specification without notice or liability.
Welwyn
Note
reserves the right to make changes
All information is subject to Welwyn’s
changes
and is considered accurate at time of
or liability.
print.
going to
TT Electronics reserves the right to make
own data
in
and is considered accurate at
notice
of going to print.
All information is subject to Welwyn’s own data
product specification without
time
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC
subsidiary of
Welwyn
A
A subsidiary
TT electronics plc of
TT electronics plc
http://www.ttelectronics.com/resistors
05 . 08
05 . 08
09.14
© TT Electronics plc
© Welwyn Components Limited
Bedlington Northumberland NE22 7AA, UK
© Welwyn Components Limited
Bedlington Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Radial Ceramic Case Resistors
Radial Ceramic Case Resistors
Wirewound / Metal Oxide
Wirewound / Metal Oxide
SQM Series
SQM / CVF / CVW Series
Termination Details:
Material
Solderability
Strength
The 100% Sn finish copper lead wires are internally welded to the resistance element end caps.
The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2
The terminations meet the requirements of IEC 86.2.21
Marking:
Type reference, resistance value and tolerance are legend marked onto the upper surface.
Flammability:
The resistor will not burn under any condition of applied temperature or overload.
Solvent resistance:
The body protection and marking are resistant to all normal industrial solvents suitable for printed
circuits.
Performance Data
Load at rated power (1000hrs at 70°C)
Derating from rated power at 70°C
short term overload (lesser of 6.25 x Pr or 2.5 x LEV for 5s)
Damp heat steady state (56 days, 40°C,
≥90% RH)
Temperature rapid change (5 cycles -55ºC to +155ºC)
Resistance
to solder heat
Voltage Proof (1kV for 60s)
Solderability
ΔR
ΔR
ΔR
ΔR
ΔR
Maximum
<100K: 5%
≥100K: 10%
See Graph
5% +0.05Ώ
5% +0.05Ώ
2% +0.05Ώ
1% +0.05Ώ
No evidence of flashover, mechanical damage,
arcing or insulation breakdown
Min.
95%
coverage
Derating Curve
P/Pr
100%
60%
0%
-55
70
155
275
T (°C)
Ordering Procedure
Example: SQM3 at 1.2 kilohms and 5% tolerance bulk packed in a box of 3000 pieces
–
SQM3
–
1K2JB3
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
B3
B2
B1
Bulk
SQM2, 3
SQM5
SQM7, 10
3000 / box
2000 / box
1000 / box
Standard
General Note
TT Electronics reserves the right to make changes in product specification without notice
7AA, UK
© Welwyn Components Limited
Bedlington Northumberland NE22
or liability.
All information is
+44 (0)
to TT Electronics’
Facsimile:
and is
(0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Telephone:
subject
1670 822181
own data
+44
considered accurate at time of going to print.
BI Technologies IRC Welwyn
05 . 08
http://www.ttelectronics.com/resistors
© TT Electronics plc
09.14
Radial Ceramic Case Resistors
Wirewound / Metal Oxide
SQM / CVF / CVW Series
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: SQM3-1K2JB3
(SQM3, 1.2 kilohms ±5%, Pb-free)
S
Q
1
1
Type
SQM2, SQM3,
SQM5, SQM7
SQM10,
M
3
-
1
K
2
2
Value
E24 = 3/4 characters
R = ohms
K = kilohms
2
J
3
B
4
3
4
3
Tolerance Packing & Termination Finish
J = ±5%
Pb-free only
K = ±10% B3 SQM2, SQM3 3000/box
B2
SQM5
2000/box
B1 SQM7, SQM10 1000/box
USA (IRC) Part Number: CVF31201JLF
(CVF3, 1.2 kilohms ±5%, Pb-free)
C
V
1
1
2
F
3
2
3
1
2
3
0
1
J
4
4
L
5
F
5
Termination
Type Size
Value
Tolerance
Packing
Finish
2
J = ±5% LF = Pb-free 2, 3 3000/box
3 digits + multiplier
3
5
2000/box
R = ohms for values K = ±10%
CVF,
<100 ohms
5
7, 10 1000/box
CVW
7
10
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
© TT Electronics plc
09.14
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
