MR/MRS/TMR Series
Low Resistance Value – Molded 2 and 4 Leads
Features:
•
•
•
•
•
•
•
•
•
•
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Metal element resistors
Excellent load life stability
Inherently non-inductive
Tinned copper leads
Low temperature coefficient
RoHS compliant / lead-free
Molded bodies
TMR – Kelvin Bridge Test
MRS high stability version
Cut and formed product is available on selected sizes
Contact factory for details
Stackpole Electronics, Inc.
Resistive Product Solutions
Electrical Specifications
Type / Code
MR 1
MR 3
MR 5
MR 10
TMR 3
TMR 5
Power Rating
(Watts)
@ 70ºC
1W
3W
5W
10W
3W
5W
Short Time Overload
5 sec. at 5x rated power
5 sec. at 5x rated power
5 sec. at 5x rated power
5 sec. at 5x rated power
5 sec. at 5x rated power
5 sec. at 5x rated power
Dielectric
Strength
500 VAC
500 VAC
500 VAC
500 VAC
500 VAC
500 VAC
Resistance Temperature
Coefficient
±50 to ±400 ppm/ºC (1)
±50 to ±400 ppm/ºC (1)
±50 to ±400 ppm/ºC (1)
±50 to ±400 ppm/ºC (1)
±40 ppm/ºC
±40 ppm/ºC
Ohmic Range (Ω) and Tolerance
1%, 5%
0.01 - 0.1
0.005 - 0.2
0.005 - 0.3
0.01 - 0.5
0.005 - 0.2
0.005 - 0.3
(1) TCR is value dependent. Contact factory for specific data.
Performance Characteristics
Test
Moisture Resistance
Thermal Shock
Load Life @ 70ºC - 1,000 hrs.
Resistance to Soldering Heat
Short Time Overload
Dielectric Withstanding Voltage
Operating Temperature Range: -55ºC to +275ºC
Test Results
±5%
±2%
±5%
±2%
±2%
±2%
How to Order
SEI Type
Code
Nominal
Resistance
Tolerance
Packaging
MR
Type
MR
TMR
MRS
Description
2Leads
4 Leads
High Stability
3
Code
1
3
5
10
0.1
1%
Tolerance
1%
5%
Type
MR 1
MR 3
MR 5
MR 10
MR 1, MR 3, MR 5
MR 10
TMR 3, TMR 5
Pkg Qty
2,000
750
500
250
1,000
500
100
R
Description
Reel
Code
R
Bulk
B
Rev Date: 06/16/2010
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
47
www.seielect.com
marketing@seielect.com
MR/MRS/TMR Series
Low Resistance Value – Molded 2 and 4 Leads
Stackpole Electronics, Inc.
Resistive Product Solutions
MR
TMR
Mechanical Specifications
Type / Code
Tolerance
MR 1
MR 3
MR 5
MR 10
TMR 3
TMR 5
A
Body Length
±0.015
±0.4
0.385
9.8
0.56
14.2
0.925
23.5
1.925
46.4
0.625
15.9
0.94
23.9
B
Body Diameter
±0.015
±0.4
0.135
3.4
0.205
5.2
0.33
8.4
0.475
10
0.205
5.2
0.33
8.4
C
Lead Length
±0.125
±3.4
1.375
34.9
1.375
34.9
1.375
34.9
1.375
34.9
1.375
34.9
1.375
34.9
D
Lead Diameter
±0.002
±0.05
0.032
0.81
0.032
0.81
0.036
0.91
0.036
0.91
0.032
0.81
0.036
0.91
E
Lead Spacing
-
-
-
-
-
0.125
3.2
0.2
5.1
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Power Derating Curve
Percent Rated Power (%)
100
75
50
25
0
25
50
100
150
200
250
275
300
Ambient Temperature (ºC)
Rev Date: 06/16/2010
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
48
www.seielect.com
marketing@seielect.com
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