WRC Series
Stackpole Electronics, Inc.
Conformal Coated Welded Wirewound Resistor
Resistive Product Solutions
Features:
•
•
•
•
•
•
•
Conformal coating
Flameproof construction
Cut and formed product is available on select sizes - contact Stackpole for details
100% RoHS compliant and lead free without exemption
Halogen free
REACH compliant
Bulk packaging available – contact Stackpole for package quantities
Electrical Specifications
Type / Code
Size
Power Rating (W)
@ 85°C
WRC1S
WRC1
WRC2A
WRC3A
WRC4A
WRC5A
WRC3B
WRC4B
WRC5B
0309
0410
0416
0416
0416
0416
0617
0617
0617
1
1
2
3
4
5
3
4
5.5
Maximum
Working
(V)
Dielectric
Withstanding
(RMS) (V)
TCR (ppm/ºC)
√P*R
700
-80 ppm/ºC ~ +900 ppm/ºC
Ohmic Range (Ω)
and Tolerance
5%
0.1 - 100
0.1 - 470
0.1 - 680
0.01 - 680
Mechanical Specifications
A
B
C
D
Body Length
Body Width
Lead Length (Bulk) (1)
Lead Diameter
0.354 max
0.138 max
1.102 ± 0.079
0.024 ± 0.002
WRC1S
9.00 max
3.50 max
28.00 ± 2.00
0.60 ± 0.05
0.394 max
0.161 max
1.102 ± 0.079
0.028 ± 0.002
WRC1
10.00 max
4.10 max
28.00 ± 2.00
0.72 ± 0.05
0.492 max
0.217 max
1.102 ± 0.118
0.028 ± 0.002
WRC2A, WRC3A WRC4A, WRC5A
12.50 max
5.50 max
28.00 ± 3.00
0.72 ± 0.05
0.630 max
0.236 max
1.102 ± 0.118
0.028 ± 0.002
WRC3B, WRC4B WRC5B
16.00 max
6.00 max
28.00 ± 3.00
0.72 ± 0.05
(1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product.
Type / Code
Unit
inches
mm
inches
mm
inches
mm
inches
mm
Performance Characteristics
Test
Moisture Resistance
Thermal Shock
Load Life @ 70ºC - 1000 hours
Shock and Vibration
Resistance to Soldering Heat
Short Time Overload
Operating temperature range for 1S and 1 is -55°C to + 200°C
Operating temperature range for 2A, 3A, 4A and 5A is -55°C to +225°C
Operating temperature range for 3B, 4B and 5B is -55°C to +250°C
Rev Date: 11/23/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
Test Results
± 5% + 0.05 Ω
± 2% + 0.05 Ω
± 5% + 0.05 Ω
± 1% + 0.05 Ω
± 2% + 0.05 Ω
± 3% + 0.05 Ω
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marketing@seielect.com
WRC Series
Stackpole Electronics, Inc.
Conformal Coated Welded Wirewound Resistor
Resistive Product Solutions
Power Derating Curve:
Recommended Solder Profile
This information is intended as a reference for solder profiles for Stackpole resistive components. These profiles should
be compatible with most soldering processes. These are only recommendations. Actual numbers will depend on board
density, geometry, packages used, etc., especially those cells labeled with “*”.
100% Matte Tin / RoHS Compliant Terminations
Soldering iron recommended temperatures: 330°C to 350°C with minimum duration.
Maximum number of reflow cycles: 3.
Wave Soldering
Description
Maximum
Recommended
Preheat Time
80 seconds
70 seconds
Temperature Diff.
140°C
120°C
Solder Temp.
260°C
250°C
Dwell Time at Max.
10 seconds
5 seconds
Ramp DN (°C/sec)
N/A
N/A
Temperature Diff. = Defference between final preheat stage and soldering stage.
Minimum
60 seconds
100°C
240°C
*
N/A
Convection IR Reflow
Description
Maximum
Recommended
Minimum
Ramp Up (°C/sec)
Dwell Time > 217°C
Solder Temp.
Dwell Time at Max.
Ramp DN (°C/sec)
3°C/sec
150 seconds
260°C
30 seconds
6°C/sec
2°C/sec
90 seconds
245°C
15 seconds
3°C/sec
*
60 seconds
*
10 seconds
*
Rev Date: 11/23/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
2
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marketing@seielect.com
WRC Series
Stackpole Electronics, Inc.
Conformal Coated Welded Wirewound Resistor
Resistive Product Solutions
Recommended Lead Free Resistor Reflow Profile
Packaging Specifications
Type / Code
A max
(1)
B max
C
D
(2)
Tape
Unit
WRC1S
2.756
70.00
11.933
303.10
0.197 ± 0.020
5.00 ± 0.50
2.047 ± 0.079
52.00 ± 2.00
0.236 ± 0.039
6.00 ± 1.00
inches
mm
WRC1
2.756
70.00
11.933
303.10
0.197 ± 0.020
5.00 ± 0.50
2.047 ± 0.079
52.00 ± 2.00
0.236 ± 0.039
6.00 ± 1.00
inches
mm
WRC2, WRC2A, WRC3A WRC4A, WRC5A
2.756
70.00
11.933
303.10
0.197 ± 0.020
5.00 ± 0.50
2.047 ± 0.079
52.00 ± 2.00
0.236 ± 0.039
6.00 ± 1.00
inches
mm
WRC3B, WRC4B WRC5B
2.756
70.00
11.933
303.10
0.197 ± 0.020
5.00 ± 0.50
2.047 ± 0.079
52.00 ± 2.00
0.236 ± 0.039
6.00 ± 1.00
inches
mm
(1) Reference value only. The "A" dimension shall be governed by the overall length of the taped component. The distance between flanges shall be 0.059 inches (1.50
mm) to 0.315 inches (8.00 mm) greater than the overall component.
(2) The given dimension "D" expresses the standard width spacing. A 26 mm narrow spacing is available a option "N" packaging code
RoHS Compliance
Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various
regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions on Hazardous Substances”
(RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our
compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as
amended by Directive (EU) 2015/863/EU as regards the list of restricted substances.
Rev Date: 11/23/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
www.seielect.com
marketing@seielect.com
WRC Series
Stackpole Electronics, Inc.
Conformal Coated Welded Wirewound Resistor
Resistive Product Solutions
RoHS Compliance Status
Standard
Product
Series
WRC
Description
Package /
Termination
Type
Standard
Series
RoHS
Compliant
Lead-Free Termination
Composition
Lead-Free
Mfg. Effective Date
(Std Product Series)
Lead-Free
Effective Date
Code
(YY/WW)
Conformal Coated Welded
Wirewound Resistor
Axial
YES
100% Matte Sn
Always
Always
“Conflict Metals” Commitment
We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the “conflict region” of the Easter
Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals used in the electronics industry
is very complex, we work closely with our own suppliers to verify to the extent possible that the materials and products we supply do
not contain metals sourced from this conflict region. As such, we are in compliance with the requirements of Dodd-Frank Act regarding
Conflict Minerals.
Compliance to “REACH”
We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High Concern) free and
compliant with the requirements of EU Directive 1907/2006/EC, “The Registration, Evaluation, Authorization and Restriction of
Chemicals”, otherwise referred to as REACH. Contact us for complete list of REACH Substance Candidate List.
Environmental Policy
It is the policy of Stackpole Electronics, Inc. (SEI) to protect the environment in all localities in which we operate. We continually strive
to improve our effect on the environment. We observe all applicable laws and regulations regarding the protection of our environment
and all requests related to the environment to which we have agreed. We are committed to the prevention of all forms of pollution.
How to Order
1
2
3
4
5
6
7
8
9
10
11
W
R
C
2
A
J
A
3
0
0
R
Product Series
Conformal
Coated
WRC
Welded
Wirewound
Size
Code
W
1S
1
1
1
2A
2
3A
3
4A
4
5A
5
3B
3
4B
4
5B
5.5
Tolerance
Code
Tol
J
5%
Code
Description
T
Tape & Reel
A
Ammo
Rev Date: 11/23/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
4
Packaging
Size
Quantity
1S
5000
1, 2A, 3A, 4A, 5A
2000
3B, 4B, 5B
1000
1S, 1
2000
2A, 3A, 4A, 5A, 3B, 4B, 5B 1000
Resistance Value
Four characters with
the multiplier used as
the decimal holder.
"L" used as multiplier
-3
of 10 for any value
under 0.1 ohm.
0.01 ohm = 10L0
0.1 ohm = R100
1 ohm = 1R00
10 ohm = 10R0
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marketing@seielect.com
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