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WW3FT250R

P1-P3P4-P5
Rev Date: 12/21/2016
1 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Electrical Specifications – Non-Inductive Styles
Features:
• WWS offers miniature size at higher power rating
• High performance for low cost
• High power to size ratio
• MWW/NMWW – completely molded construction with welded terminations
• Complete welded terminations
• Tinned copper leads
• Available in non-inductive styles
• Tighter tolerances may be available for non-inductive styles.
Contact Stackpole with requirements.
• High temperature silicone coating
• RoHS compliant
• Higher operating temperatures available
• “B” packaging code denotes bulk packaging - contact Stackpole for package quantities
Electrical Specifications – WW, WWS, MWW
0.1% 0.5% 1% 5%
WW12 - 0.4 W 0.5 W
5 - 2K 5 - 2K
WW1 - 1 W 1.1 W
WW1A RW-70 1 W 1.3 W
WW2 RW-69 1.5 W 2.1 W
1 - 10K
WWS2 - 2.5 W 2.6 W
1 - 10K
WW2A - 2.5 W 2.6 W
1 - 10K
WW3 RW-79 3 W 3.2 W
1 - 22K
WWS3 - 3 W 3.2 W
3 - 10K
WW3A - 3 W 3.4 W
1 - 30K
WW4 - 4 W 4.3 W
1 - 40K
WWS4 RW-79 4 W 4.3 W
1 - 22K
WW5 RW-67, RW-74 5 W 5.1 W
1 - 50K
WWS5 - 5 W 5.1 W
1 - 40K
WW7 - 6.5 W 7.2 W
1 - 70K
WWS7 RW-67, RW-74 6.5 W 7.2 W
1 - 50K
WW7B - 7 W 7.7 W
1 - 70K
WW10 RW-78 10 W 11 W
1 - 100K
WWS10 - 10 W 11 W
1 - 70K
MWW1 RW-70 1 W 1.3 W
MWW3 RW-79 3 W 3.2 W
MWW5 RW-67, RW-74 5 W 5.5 W
MWW10 RW-68, RW-74 10 W 11 W
5 - 2K
3 - 20K
2 - 40K
2 - 80K
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
(*) Other resistance values available - contact factory for details.
3 - 2K
2 - 3K
1 - 5K
Type / Code
MIL-R-26 Ref.
Power Rating
(W)
@ 125ºC
Power Rating
(W)
@ 70ºC
TCR (ppm/ºC)
Ohmic Range (Ω) and Tolerance (*)
1% 5%
NWW12 - 0.4 W 0.5 W
NWW1 - 1 W 1.1 W
NWW1A RW-70 1 W 1.3 W
NWW2 RW-69 1.5 W 2.1 W
NWWS2 - 2.5 W 2.6 W
NWW2A - 2.5 W 2.6 W
NWW3 RW-79 3 W 3.2 W
NWWS3 - 3 W 3.2 W
NWW3A - 3 W 3.4 W
NWW4 - 4 W 4.3 W
NWWS4 RW-79 4 W 4.3 W
NWW5 RW-67, RW-74 5 W 5.1 W
NWWS5 - 5 W 5.1 W
NWW7 - 6.5 W 7.2 W
NWWS7 RW-67, RW-74 6.5 W 7.2 W
NWW7B - 7 W 7.7 W
Ohmic Range (Ω) and Tolerance (*)
(*) Other resistance values available - contact factory for details.
1 - 25K
1 - 35K
1 - 25K
1 - 20K
1 - 35K
1 - 15K
1 - 20K
1 - 11K
1 - 5K
1 - 5K
1 - 11K
3 - 5K
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
10 - 1K
2 - 1.5K
1 - 2.5K
1 - 5K
Type / Code
MIL-R-26 Ref.
Power Rating
(W)
@ 125ºC
Power Rating
(W)
@ 70ºC
TCR (ppm/ºC)
Rev Date: 12/21/2016
2 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Performance Characteristics
Mechanical Specifications
Test Test Condition Test Specification
Moisture Resistance 1000 hours, 95% R.H., 40ºC 1% max
Load Life
1000 hours,
cycled power 1.5 hours ON, 0.5 hours OFF, 25ºC
1%
Temperature Cycling 5 cycles, -55ºC to 200ºC 0.5%
Short Time Overload 5 times rated power for 5 seconds 1%
Dielectric Withstand Voltage
Resistor leads are grounded and high potential probe is
touched to the resistor body
500V for (N)WW12, 1, 1A and 2S.
1000V for all others
Operating Temperature Range: -55ºC to +350ºC
Electrical Specifications – Non-Inductive Styles (cont.)
1% 5%
NWW10
RW-78 10
W 11 W
NWWS10 -
10
W
11
W
NMWW1 RW-70
1 W 1.3 W
NMWW3 RW-79 3
W 3.2
W
NMWW5
RW-67, RW-74 5 W 5.5 W
NMWW10 RW-68, RW-74 10
W 11
W
2 - 20K
2 - 40K
(*) Other resistance values available - contact factory for details.
Ohmic Range (Ω) and Tolerance (*)
< 1Ω = ±90ppm/ºC
1Ω to 10Ω = ± 50ppm/ºC
>10Ω = ±20ppm/ºC
1 - 50K
1 - 35K
5 - 1K
3 - 10K
Type / Code
MIL-R-26 Ref.
Power Rating
(W)
@ 125ºC
Power Rating
(W)
@ 70ºC
TCR (ppm/ºC)
0.312 ± 0.062 0.110 ± 0.031 0.025 ± 0.002 1.500 typ. inches
7.92 ± 1.57 2.79 ± 0.79 0.64 ± 0.05 38.10 typ. mm
0.375 ± 0.062 0.110 ± 0.031 0.025 ± 0.002 1.500 typ. inches
9.53 ± 1.57 2.79 ± 0.79 0.64 ± 0.05 38.10 typ. mm
0.420 ± 0.062 0.110 ± 0.031 0.025 ± 0.002 1.500 typ. inches
10.67 ± 1.57 2.79 ± 0.79 0.64 ± 0.05 38.10 typ. mm
0.370 ± 0.062 0.156 ± 0.031 0.032 ± 0.002 1.500 typ. inches
9.40 ± 1.57 3.96 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.550 ± 0.062 0.156 ± 0.031 0.032 ± 0.002 1.500 typ. inches
13.97 ± 1.57 3.96 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.560 ± 0.062 0.187 ± 0.031 0.032 ± 0.002 1.500 typ. inches
14.22 ± 1.57 4.75 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.500 ± 0.062 0.218 ± 0.031 0.032 ± 0.002 1.500 typ. inches
12.70 ± 1.57 5.54 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.700 ± 0.062 0.270 ± 0.031 0.036 ± 0.002 1.500 typ. inches
17.78 ± 1.57 6.86 ± 0.79 0.91 ± 0.05 38.10 typ. mm
0.875 ± 0.062 0.312 ± 0.031 0.036 ± 0.002 1.500 typ. inches
22.23 ± 1.57 7.92 ± 0.79 0.91 ± 0.05 38.10 typ. mm
1.000 ± 0.062 0.312 ± 0.031 0.036 ± 0.002 1.500 typ. inches
25.40 ± 1.57 7.92 ± 0.79 0.91 ± 0.05 38.10 typ. mm
A
B
C
Unit
Type / Code
D
(Bulk)
(1)
WW5, WWS7
WW7
(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product.
/
WW12
WW3, WWS4
WW3A
WW4, WWS5
WW1, WWS2
WW1A
WW2, WWS3
WW2A
/
/
/
/
/
NWW3, NWWS4
/
/
/
/
NWW12
NWW1, NWWS2
NWW1A
NWW2, NWWS3
NWW2A
NWW3A
NWW4, NWWS5
NWW5, NWWS7
NWW7
Rev Date: 12/21/2016
3 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
WW/MWW/NWW/WWS Series
General Purpose and Precision Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
0
300
350
400
Ambient Temperature (ºC)
350ºC
-60
0
50
100
150
200
250
Percent Rated Power (%)
100
-55ºC
80
60
40
20
100ºC
Power Derating Curve:
Energy Handling Capability:
(Typical performance - for reference only.)
Mechanical Specifications (cont.)
1.200 ± 0.062 0.312 ± 0.031 0.036 ± 0.002 1.500 typ. inches
30.48 ± 1.57 7.92 ± 0.79 0.91 ± 0.05 38.10 typ. mm
1.780 ± 0.062 0.375 ± 0.031 0.040 ± 0.002 1.500 typ. inches
45.21 ± 1.57 9.53 ± 0.79 1.02 ± 0.05 38.10 typ. mm
0.385 ± 0.062 0.135 ± 0.031 0.032 ± 0.002 1.500 typ. inches
9.78 ± 1.57 3.43 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.560 ± 0.062 0.205 ± 0.031 0.032 ± 0.002 1.500 typ. inches
14.22 ± 1.57 5.21 ± 0.79 0.81 ± 0.05 38.10 typ. mm
0.925 ± 0.062 0.330 ± 0.031 0.036 ± 0.002 1.500 typ. inches
23.50 ± 1.57 8.38 ± 0.79 0.91 ± 0.05 38.10 typ. mm
1.965 ± 0.062 0.480 ± 0.031 0.040 ± 0.002 1.500 typ. inches
49.91 ± 1.57 12.19 ± 0.79 1.02 ± 0.05 38.10 typ. mm
(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product.
(2) Lead diameter (C) available in 0.036" / 0.91mm.
MWW10
WW7B, WWS10
WW10
MWW1
MWW3
MWW5
/
NMWW1
NMWW3
NMWW5
NMWW10
NWW7B, NWWS10
NWW10
(2)
Type / Code
/
/
/
/
/
A
B
C
D
Unit
(Bulk)
(1)
P1-P3P4-P5

WW3FT250R

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Buy WW3FT250R
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Description:
RES 250 OHM 3W 1% AXIAL
Lifecycle:
New from this manufacturer.
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