RWT Series
Thermal Fusing Vertical Mount Resistor
Features:
•
•
•
Good anti-surge capability
Wirewound on ceramic element
RoHS compliant / lead-free
Stackpole Electronics, Inc.
Resistive Product Solutions
Electrical Specifications
Type / Code
RWT2
RWT5
RWT7
Element Power Rating
(Watts) @ 70ºC
2W
5W
7W
Element + Fuse Power
Rating (Watts) @ 70ºC
1.5 W
1.6 W
2W
142ºC
2A
±200 ppm/ºC
Rated
Functioning
Temperature
Fusing
Current
Resistance
Temperature
Coefficient
Ohmic Range (Ω)
and Tolerance
5%
1 - 100
1 - 470
Mechanical Specifications
No.
1
2
3
4
5
6
7
Part Name
Cap
Element core
Resistive Wire
Thermal fuse
Enclosed cement
Ceramic case
Lead wire
Type / Code
RWT 2
RWT 5
RWT 7
W
0.433 ± 0.020
11.00 ± 0.50
0.512 ± 0.039
13.00 ± 1.00
0.512 ± 0.039
13.00 ± 1.00
H
0.807 ± 0.059
20.50 ± 1.50
0.984 ± 0.059
25.00 ± 1.50
1.535 ± 0.059
39.00 ± 1.50
S
0.276 ± 0.039
7.00 ± 1.00
0.374 ± 0.039
9.50 ± 1.00
0.374 ± 0.039
9.50 ± 1.00
L
0.197 ± 0.020
5.00 ± 0.50
0.197 ± 0.020
5.00 ± 0.50
0.197 ± 0.020
5.00 ± 0.50
P
0.197 ± 0.039
5.00 ± 1.00
0.197 ± 0.039
5.00 ± 1.00
0.197 ± 0.039
5.00 ± 1.00
d1
0.024 ± 0.002
0.60 ± 0.05
0.024 ± 0.002
0.60 ± 0.05
0.024 ± 0.002
0.60 ± 0.05
d2
0.031 ± 0.002
0.80 ± 0.05
0.031 ± 0.002
0.80 ± 0.05
0.031 ± 0.002
0.80 ± 0.05
Unit
inches
mm
inches
mm
inches
mm
Rev Date: 08/27/2015
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
www.seielect.com
marketing@seielect.com
RWT Series
Thermal Fusing Vertical Mount Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Performance Characteristics
Test
Short Time Overload
Load Life
Humidity Test (no load)
Humidity Test (rated load)
Resistance to Soldering Heat
Solderability
Insulation Resistance
Operating Temperature Range : -25ºC to +100ºC
Test Method
Apply DV voltage of 2.5 times the rated voltage for 5 sec.
Apply rated DC voltage for 1.5 hr. ON and 0.5 hr. OFF. Total time of 1000 hrs.
Temperature of 40ºC. Humidity of 90-95% RH. Total time of 1000 hrs.
Temperature of 40ºC. Humidity of 90-95% RH. Apply 1/10 rated power for 1.5 hr. ON
and 0.5 hr. OFF. Total time of 1000 hrs.
Dip lead into solder bath at temperature of 260ºC x 10ºC up to 1.5mm from the body of the
resistor. Leave in solder bath for 10 secs. Test after 24 hrs. in room temperature
> 95% coverage
R < 1GΩ
Test Results
±2%
±3%
±2%
±2%
±1%
Fusing Characteristics:
450
400
Fusing Time (sec) .
350
300
250
200
150
100
50
0
1
10
100
1000
RWT 7
RWT 5
RWT 2
RWT 2
RWT 5
RWT 7
Power (W)
How to Order
1
2
3
4
5
6
7
8
9
10
11
R
W
T
2
A
J
B
1
0
0
R
Product Series
RWT Thermal Fuse
Size
2
5
7
Power
2W
5W
7W
A
Fuse Type
250V 2A 142ºC
Tolerance
Tol
Code
5%
J
Code
B
Packaging
Description
Size
2
Bulk
5
7
Resistance Value
Quantity
1,500
1,000
800
Four characters with
the multiplier used as
the decimal holder.
1 ohm = 1R00
10 ohm = 10R0
100 ohm = 100R
Rev Date: 08/27/2015
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
2
www.seielect.com
marketing@seielect.com
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