35 ±3
2W: 23 ±3
L
d
W
H
ø2.7
0.6
P
L
P1 D
P2 H
H1
W
D
ø2.7
W
H
H1
ø4 ±0.2
C
GB
A
Type SQ Series
This flexible range of Power
Wirewound Resistors either have
wire or power oxide film elements.
The SQ series resistors are wound
or deposited on a fine non - alkali
ceramic core then embodied in a
ceramic case and sealed with an
inorganic silica filler. This design
provides a resistor with high
insulation resistance, low surface
temperature, excellent T.C.R., and
entirely fire proof construction.
These resistors are ideally suited to
a range of areas where low cost,
and efficient thermal performance
are important design criteria. Metal
film cores adjusted by laser spiral
are used where the resistor value is
above that suited to wire.
Similar performance is obtained
although short time overload is
slightly derated.
Key Features
■Choice of Styles
■Bracketed Types
Available
■Temp. Op. -55°C to
+250°C
■Wide Value Range
■Stable TCR 300ppm/°C
■Custom Designs
Welcome
■Inorganic Flame Proof
Construction
Characteristics -
Electrical
Test Condition Performance
Resistance Temp. Coefficient: -55°C ~ 155°C ± 300ppm/°C
*Short Time Overload: 10 times rated power for 5 seconds ± 2%
Rated Load: Rated power for 30 minutes ± 1%
Voltage Withstand: 1000V AC 1 minute no change
Insulation Resistance: 500V megger 1000 Meg
Temperature Cycle: -30°C ~ 85°C for 5 cycles ± 1%
Load Life: 70°C on-off cycle for 1000 hours ± 5%
Moisture-proof Load Life: 40°C 95% RH on-off cycle 1000 hours ± 5%
Incombustability: 16 times rated wattage for 5 minutes No flame
Max. Overload Voltage: 2 times max. working voltage
*Metal Film Elements: Short time overload 5 times rated power, 5 seconds
Power Dimensions Resistance Range Max. Working
Rating W ± 1 H ± 1 L ± 1.5 d ± 0.05 l ± 0.3 Wire Metal Film Voltage
2W 7 7 18 0.65 23 R10 - 82R 83R - 10K 150V
3W 8 8 22 0.8 35 R10 - 180R 181R - 33K 350V
5W 10 9 22 0.8 35 R10 - 180R 181R - 100K 350V
7W 10 9 35 0.8 35 R10 - 430R 431R - 100K 500V
10W 10 9 48 0.8 35 R10 - 470R 471R - 100K 750V
15W 12.5 11.5 48 0.8 35 R50 - 600R 601R - 150K 1000V
20W - 25W 14 13.5 60 0.8 35 R50 - 1K0 1.1K - 150K 1000V
Rated Continuous Working Voltage (RCWV)
RCWV: Rated Power x Resistance Value or Maximum Working Voltage listed above whichever is lower
Type SQH - Horizontal
with Solder Lugs
Power Dimensions Resistance Range
Rating W ± 1 H ± 1 L ± 1.5 P H1± 1 D±0.5 P1±0.2 P2±0.2 Wire Metal Film
10W 10 10 48 32 ±1 21 5 2.5 1.7 R50 - 600R 601R - 50K
15W 12.5 11.5 48 32 ±1 21 5 2.5 1.7 1R0 - 600R 601R - 50K
20W 14.5 13.5 60 42 ±1 24 6 3.0 2.5 1R0 - 1K0 1K1 - 50K
30W 19 19 75 55 ±2 31 7.5 – – 1R0 - 2K0 –
40W 19 19 90 67 ±2 31 7.5 – – 1R0 - 2K0 –
Type SQB - Horizontal with
Solder Lugs and Bracket
Power Dimensions
Rating A ± 0.5 B ± 0.5 C ± 0.5 G ± 0.5
10W 8.0 5.0 12.0 3.0
15W 8.0 5.5 12.0 3.0
20W 8.0 5.5 12.0 3.0
30W 10.5 8.0 18.0 3.5
40W 10.5 8.0 18.0 3.5
Literature No. 1773285
Issued: 10-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
High Power Resistors
Type SQ Series
Type SQP - Horizontal
Power Derating Curve Load Against Temperature
-50 0 50 100 150 200 250 300
-55 -70
100
80
60
40
20
0
Rated Load (%)
Ambient Temperature (°C)
155°C 275°C
0 20 40 06 80 100
300
250
200
150
100
50
0
Surface Temperature (°C)
Rated Load (%)
5W
7W, 10W
15W-40W
Type SQM - Vertical
Power Dimensions Resistance Range
Rating W ± 1 H ± 1 S ± 1.5 P ± 2.0 Wire Metal Film
2W 11 20 7 5 R10 - 82R 83R - 10K
3W 12 25 8 5 R10 - 180R 181R - 33K
5W 13 25 9 5 R10 - 180R 181R - 100K
7W 13 39 9 5 R10 - 430R 431R - 100K
10W 13 51 9 5 R10 - 470R 471R - 100K
10WS 16 35 12 7.5 R10 - 360R 361R - 100K
N.B. Custom design versions in wire at low tolerances, better T.C.R., and higher ohmic values are available to
special order. Please enquire.
Suggested PCB Layout Plan
Type SPS - Vertical Mounting
with Stabilising Bracket
Power Dimension Resistance Range
Rating L ± 1.5 K ± 0.5 Wire Metal Film
7W 48 8.5 R10 - 430R 431R - 100K
10W 60 20 R10 - 470R 471R - 100K
5.0 5.0
2.0
0.8
5.0
5.0
R0.2
Ø1.0
Literature No. 1773285
Issued: 10-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
High Power Resistors
Type SQ Series
Type SQZ - Horizontal
Pluggable
Power Dimensions Resistance Range
Rating W±1 H±1 L±1.5 P±1.5 P1 P2 P3 P4 H1±1 H2±1 Wire Metal Film
5W 10 10 28 15 4.2 2 5 1.5 25 10.5 R10 - 130R 131R - 100K
7W 10 10 36 20 4.2 2 5 1.5 25 10.5 R10 - 430R 431R - 100K
10W 10 10 48 32 4.2 2 5 1.5 25 10.5 R20 - 470R 471R - 100K
15W 12.5 12 48 32 4.2 2 5 1.5 26 10.5 1R0 - 600R 601R - 150K
20W-25W* 15 13 60 42 7 6 10 2.7 36 15.0 1R0 - 1K0 1K1 - 150K
*NB: 20W & 25W Devices Terminations are not crimped
How to Order
SQP W 20 1R0 F
Common Part
W - Wire
R - Metal Film
Element
2 - 2 Watts
3 - 3 Watts
5 - 5 Watts
etc
Rated Power Resistance Value
SQP - Axial Type
SQZ - Pluggable Type
SQM - Vertical Type
SPS - Vertical Type
SQH - Horizontal Type
SQB - Horizontal Type
(with bracket)
0.1 ohm
(1 milliohm) R10
1 ohm
(1000 milliohms) 1R0
1K ohm
(1000 ohms) 1K0
1M ohm
(1000000 ohms) 1M0
Resistance Tolerance
F - ±1%
G - ±2%
J - ±5%
K - ±10%
Literature No. 1773285
Issued: 10-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
High Power Resistors
Type SQ Series
Type SQZ - Recommended
PCB Hole Dimensions
Power
Rating a b p
5W 2.0 0.8 15
7W 2.0 0.8 20
10W 2.0 0.8 32
15W 2.0 0.8 32
20W_25W 3.5 1.0 42
