Rev Date: 11/30/2020

1

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RWT Series

Thermal Fusing Vertical Mount Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

Mechanical Specifications

Electrical Specifications

Performance Characteristics

Features:

•

Good anti-surge capability

•

Wirewound on ceramic element

•

100% RoHS compliant and lead free without exemption

•

Halogen free

•

REACH compliant

No. Part Name

1 Cap

2 Element core

3 Resistive Wire

4 Thermal fuse

5 Enclosed cement

6 Ceramic case

7 Lead wire

Test

Test Method

Test Results

Short Time Overload

Apply DV voltage of 2.5 times the rated voltage for 5 seconds.

± 2%

Load Life

Apply rated DC voltage for 1.5 hour ON and 0.5 hour OFF. Total time of 1000 hours.

± 3%

Humidity Test (no load)

Temperature of 40ºC. Humidity of 90 - 95% RH. Total time of 1000 hours.

± 2%

Humidity Test (rated load)

Temperature of 40ºC. Humidity of 90 - 95% RH. Apply 1/10 rated power for 1.5 hour ON

and 0.5 hour OFF. Total time of 1000 hours.

± 2%

Resistance to Soldering Heat

Dip lead into solder bath at temperature of 260ºC x 10ºC up to 1.5 mm from the body of the

resistor. Leave in solder bath for 10 seconds. Test after 24 hours in room temperature.

± 1%

Solderability

Insulation Resistance

Operating Temperature Range : -25ºC to +100ºC

R < 1 G Ω

> 95% coverage

5%

RWT2

2

1.5

RWT5

5

1.6

RWT7

7

2

1 - 470

1 - 100

Element

Power Rating (W)

@ 70ºC

TCR (ppm/ºC)

Ohmic Range (

Ω)

and Tolerance

Fusing

Current

(A)

Rated Functioning

Temperature

(°C)

Element + Fuse

Power Rating (W)

@ 70ºC

Max Voltage Rating =

Type/Code

± 200

2

142

√ P*R

0.433 ± 0.020

0.807 ± 0.059

0.276 ± 0.039

0.197 ± 0.020

0.197 ± 0.039

0.024 ± 0.002

0.031 ± 0.002

inches

11.00 ± 0.50

20.50 ± 1.50

7.00 ± 1.00

5.00 ± 0.50

5.00 ± 1.00

0.60 ± 0.05

0.80 ± 0.05

mm

0.512 ± 0.039

0.984 ± 0.059

0.374 ± 0.039

0.197 ± 0.020

0.197 ± 0.039

0.024 ± 0.002

0.031 ± 0.002

inches

13.00 ± 1.00

25.00 ± 1.50

9.50 ± 1.00

5.00 ± 0.50

5.00 ± 1.00

0.60 ± 0.05

0.80 ± 0.05

mm

0.512 ± 0.039

1.535 ± 0.059

0.374 ± 0.039

0.197 ± 0.020

0.197 ± 0.039

0.024 ± 0.002

0.031 ± 0.002

inches

13.00 ± 1.00

39.00 ± 1.50

9.50 ± 1.00

5.00 ± 0.50

5.00 ± 1.00

0.60 ± 0.05

0.80 ± 0.05

mm

d2

RWT7

Type/Code

Unit

RWT2

RWT5

W

H

S

L

P

d1