WSM1R036JLFTR - TT Electronics/IRC

Molded Surface Mount

Wirewound Resistor

WSM Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

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.

12.12

· Flexible Terminations

· All welded construction

· Ideal for automatic pick and place

· Lead free, RoHS compliant construction only

· Contact factory for ohmic values above

published ranges

General Note

IRC reserves the right to make changes in product speciﬁ cation without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of

TT electronics plc

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Molded Surface Mount

Wirewound Resistor

WSM Series

• Flexible Terminations

• All welded construction

• Ideal for automatic pick and place

• Lead free, RoHS compliant construction only

• Contact factory for ohmic values above published ranges

*Note: 5% or 10% preferred below 0.1 ohms.

Electrical Data

IRC

Type

Power Rating

@ 70°C

(watts)

Resistance

Range

(ohms)

Maximum Working

Voltage

(volts)

TCR

(ppm/°C)

Resistance

Tolerance

(%)

Standard

Values

Ambient

Temperature

(°C)

WSM-1 1W 0.01 to 1K

P x R 0.1:- <10:: 100

t1:: 20 *1, 2, 5, 10 E24

Preferred -55 to 155

WSM-2 2W 0.01 to 2K

WSM-3 3W 0.01 to 3K

CONSTRUCTION

A high purity ceramic substrate is assembled with interference ﬁ t end caps to which are welded the terminations.

The resistive element is wound on the substrate and welded to the caps. The unit is then molded.

FLAMMABILITY

The resistor coating is categorized as ﬂ ame retardant epoxy under UL-94.

SOLVENT RESISTANCE

The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed

circuits.

MARKING

WSM resistors are legend marked with type, value and tolerance.

WSM Series Issue August 2009 Sheet 1 of 3

Molded Surface Mount

Wirewound Resistor

WSM Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

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.

12.12

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Wire and Film Technologies Division

TELEPHONE:sFACSIMILE:sWEBSITE:WWWIRCTTCOM

Physical Data

Recommended Pad Sizes

Dimensions (Inches & mm))

DCBAepyT

WSM-1

WSM-2 0.157 inch

(4.0 mm)

0.85 inch

(21.6 mm)

0.677 max

(17.2 max)

0.425 max

(10.8 max)

0.64 max

(16.3 max)

0.29 max

(7.4 max)

0.195 max

(5.0 max)

0.265 inch

(6.7 max)

0.13 inch

(3.3 mm)

0.138 inch

(3.5 mm)

0.35 inches

(8.9 mm)

0.583 inch

(14.8 mm)

0.85 inch

(21.6 mm)

0.074 inch

(1.9 mm)

0.221 inch

(5.6 mm)

0.378 inch

(9.6 mm)

0.181 inch

(4.6 mm)

0.236 inch

(6.2 mm)

WSM-3

Molded Surface Mount

Wirewound Resistor

Dimensions Inches (mm)

Type L l A W H

WSM-1 0.310 max

(7.9 max)

0.115 max

(2.9 max)

0.137 max

(3.5 max)

0.137 max

(3.5 max)

0.275 max

(7.0 max)

0.165 max

(4.2 max)

0.155 max

(3.94 max)

WSM-2 0.473 max

(12 max)

0.260 max

(6.6 max)

WSM-3

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Molded Surface Mount

Wirewound Resistor

WSM Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

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.

12.12

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Molded Surface Mount

Wirewound Resistor

*Note: The power ratings to be applied depend upon the board used and the ambient temperature.

Sample Part No.

IRC Type

(WSM1, WSM2, WSM3)

Resistance Value

(100: and greater - First 3 significant digits plus

4th digit multiplier) Example: 100: = 1000, 1000: = 1001,

150,000: = 1503 (Less than 100: - "R" is used to designate

decimal) Example: 51: = 51R0, 1: = 1R00, 0.25: = R250

Tolerance

(K = 10%, J = 5%, G = 2%, F = 1%)

Lead Free, RoHS Designator

Packaging Code

(TR = 13" Reel)

Ordering Data

WSM3 6801 F LF TR

Specify type, reference, etc. as indicated in this example of a

WSM3 6801 F resistor with tape and reel packaging.

Standard Quantities Per Package

Type Code WSM1 WSM2 WSM3

13" Reel

(330mm) R 1500 800 750

Packaging:

WSM2 resistors are supplied on .945 (24mm) wide

carrier tape.

WSM3 resistors are supplied on 1.26 (32mm) wide

carrier tape.

Both products are reeled onto 13.00 (330mm)

diameter reels.

*For packaging information, see Appendix "A".

Environmental Data

Characteristics WSM-1 WSM-2 WSM-1

Load at Rated Power: 1000 hours @ 70°C 2 ± 0.001:2 ± 0.001:3 ± 0.001:

Dry Heat: 1000 hours @ 155°C 2 ± 0.001:2 ± 0.001:3 ± 0.001:

Short Term Overload 2 ± 0.001:

Derating from Rated Power @ 70°C zero at 155°C

Moisture 1 ± 0.001:1 ± 0.001:1.5 ± 0.001:

Temperature Cycling 1 ± 0.001:

Resistance to Solder Heat 1 ± 0.001:

Isolation Voltage 1,000

Insulation Resistance >1000M

Substrate Bend 0.2 ± 0.001:

'R%

volts

ohms

'R%

Dimensions (Inches and (mm))

Ao Bo Ko W P T

WSM1 .165

(4.2)

.300

(7.62)

.165

(4.20)

.630

(16.0)

.315

(8.00)

.014

(0.36)

WSM2 .266

(6.75)

.470

(11.95)

.206

(5.22)

.945

(24.0)

.473

(12.0)

.014

(0.36)

WSM3 .288

(7.3)

.721

(18.3)

.264

(6.7)

1.26

(32.0)

.473

(12.0)

.016

(0.4)

A0P

B0W

WSM Series Issue August 2009 Sheet 3 of 3