Resistors
Wirewound / Metal Oxide
Wirewound / Metal
Resistors
Radial Ceramic Case
Oxide
Wirewound / Metal Oxide
SQM Series
SQM Series
2
to
10 watts
Series
2
/
10
CVW
SQM
to
CVF /
watts
RoHS compliant
Resistance 0R1 to 200K
Resistance 0R1 to 200K
2 to 10 watts
High overload capability
High overload capability
Resistance 0R1 to 200K
Flameproof case
High overload capability
Small PCB footprint
Flameproof case
RoHS compliant
Small PCB footprint
Electrical Data
Electrical Data
Power rating at 70°C
Resistance range – wirewound (CVW)
Resistance range – oxide (CVF)
watts
/
ohms
CV-2
ohms
SQM2 / CV-2
2
0R1 - 27R
30R
–
33K
150
50
50
SQM3 / CV-3
3
0R1 - 39R
43R
–
56K
300
45
45
SQM5 / CV-5
5
0R1 - 47R
51R
–
100K
350
30
30
SQM7 / CV-7 SQM10 / CV-10 SQM10A / CV-10
7
10
10
0R1 - 680R
750R - 200K
500
28
28
0R1 - 910R
1K0 - 200K
750
23
23
0R1 - 560R
750
23
23
Limiting element voltage
Thermal impedance
Thermal impedance
Isolation voltage
Isolation voltage
TCR
TCR
volts dc or ac rms
°C /watt
°C /watt
volts
volts
ppm/°C
ppm/°C
Resistance Tolerance
Resistance Tolerance
Standard Values
Standard Values
%
%
1000
1000
<20R: ± 400,
≥20R:
± 350
<20R: ± 400,
≥20R:
± 350
± 5 ± 10
± 5 ± 10
E24
E24
Ambient temperature range
Ambient temperature range
°C
°C
-55 to +155ºC
-55 to +155ºC
Physical Data
(all dimensions
mm, weights in g)
Physical Data
(all dimensions in mm, weights in g)
in g)
Physical Data
(all dimensions in
in mm, weights
L
L
± 1.0
± 1.0
SQM2 / CV-2
20
SQM2 / CV-2
20
SQM3 / CV-3
25
SQM3 / CV-3
25
SQM5 / CV-5
25
SQM5 / CV-5
25
SQM7 / CV-7
38
SQM7 / CV-7
38
SQM10 / CV-10
50
SQM10 / CV-10
50
SQM10A / CV-10
35
SQM10A / CV-10
35
Type
Type
B
E
F
W
D
B
E
F
W
D
± 1.0 ± 1.0
± 1.0 ± 1.0 ± 1.0
± 1.0 ± 1.0 ± 1.0 ± 1.0 ± 1.0
4.5
3.0
3.0
11.5
7.5
4.5
3.0
3.0
11.5 7.5
4.5
4.0
4.0
12.5
8.5
4.5
4.0
4.0
12.5 8.5
12.5
9
5.0
3.5
3.5
12.5
9
5.0
3.5
3.5
12.5
9
5.0
2.75 5.0
12.5
9
5.0
2.75 5.0
12.5
9
4.25 2.75 5.0
12.5
9
4.25 2.75 5.0
16.0
12
6.0
4.25 4.25
16.0
12
6.0
4.25 4.25
P
d
Weight
P
d
Weight
± 1.0 ± 0.05 Nom.
± 1.0 ± 0.05 Nom.
5
0.7
4.3
5
0.7
4.3
5
0.7
5.6
5
0.7
5.6
5
0.8
6.3
5
0.8
6.3
5
0.8
10.7
5
0.8
10.7
5
0.8
13.4
5
0.8
13.4
7.5
0.8
13.8
7.5
0.8
13.8
B
B
W
W
D
D
Marked side
Marked side
L
L
d
d
F
F
P
P
5±1
5±1
E
E
Construction
A high purity ceramic rod, with force fit end
into a
onto which is wound a wire
insulation
or a deposited metal oxide film
(depending on value). The element is fitted
caps
ceramic case with fireproof
element:
cement.
A
(depending on value). The element
fit
fitted
caps onto which is wound
fireproof insulation cement.
high purity ceramic rod, with force
is
end
into a ceramic case with
a wire element: or a desposited metal oxide film
(depending on value). The element is fitted into a ceramic case with fireproof insulation cement.
Construction
Construction
A high purity ceramic rod, with force fit end caps onto which is wound a wire element: or a deposited metal oxide film
General Note
General Note
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
04.18
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
04.18
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,
SQM10A
M
3
-
1
K
2
2
Value
E24 = 3/4 characters
R = ohms
K = kilohms
2
J
3
B
4
3
J = ±5%
K = ±10%
4
Pb-free only
SQM2, SQM3 3000/box
SQM5
2000/box
SQM7, SQM10 1000/box
SQM10A
900/box
3
Tolerance Packing & Termination Finish
B3
B2
B1
B09
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
04.18
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