Rev Date: 03/24/2011 1 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MR/MRS/TMR Series
Low Resistance Value Resistor – Molded 2 and 4 Leads Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
• Metal element resistors
• Excellent load life stability
• Inherently non-inductive
• Tinned copper leads
• Low temperature coefficient
• RoHS compliant
• Molded bodies
• TMR – Kelvin Bridge Test
• MRS high stability version
• Cut and formed product is available on selected sizes
• Contact factory for details
T
y
pe / Code
1%, 5%
MR1 1W 5 sec. at 5x rated power 500 VAC ±50 to ±400 ppm/ºC (1) 0.01 - 0.1
MR3 3W 5 sec. at 5x rated power 500 VAC ±50 to ±400 ppm/ºC (1) 0.005 - 0.2
MR5 5W 5 sec. at 5x rated power 500 VAC ±50 to ±400 ppm/ºC (1) 0.005 - 0.3
MR10 10W 5 sec. at 5x rated power 500 VAC ±50 to ±400 ppm/ºC (1) 0.01 - 0.5
TMR3 3W 5 sec. at 5x rated power 500 VAC ±40 ppm/ºC 0.005 - 0.2
TMR5 5W 5 sec. at 5x rated power 500 VAC ±40 ppm/ºC 0.005 - 0.3
Test Test Results
Moisture Resistance ±5%
Thermal Shock ±2%
Load Life @ 70ºC - 1,000 hrs. ±5%
Resistance to Soldering Heat ±2%
Short Time Overload ±2%
Dielectric Withstanding Voltage ±2%
Operating Temperature Range: -55ºC to +275ºC
(1) TCR is value dependent. Contact factory for specific data.
Ohmic Range (Ω) and Tolerance
Power Rating
(Watts)
@ 70ºC
Resistance Temperature
Coefficient
Dielectric
Strength
Short Time Overload
Electrical Specifications
Performance Characteristics
Ambient Temperature (ºC)
150 200 250 300
25
050 100
100
75
50
Power Derating Curve:
Percent Rated Power (%)
27525
Rev Date: 03/24/2011 2 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MR/MRS/TMR Series
Low Resistance Value Resistor – Molded 2 and 4 Leads Stackpole Electronics, Inc.
Resistive Product Solutions
MR TMR
±0.015 ±0.015 ±0.125 ±0.002 inches
±0.4 ±0.4 ±3.4 ±0.05 mm
0.385 0.135 1.375 0.032 inches
9.8 3.4 34.9 0.81 mm
0.56 0.205 1.375 0.032 inches
14.2 5.2 34.9 0.81 mm
0.925 0.33 1.375 0.036 inches
23.5 8.4 34.9 0.91 mm
1.925 0.475 1.375 0.036 inches
46.4 10 34.9 0.91 mm
0.625 0.205 1.375 0.032 0.125 inches
15.9 5.2 34.9 0.81 3.2 mm
0.94 0.33 1.375 0.036 0.2 inches
23.9 8.4 34.9 0.91 5.1 mm
E
Lead Spacing
(Ref.)
A
Body Length
B
Body Diameter
C
Lead Length
D
Lead Diameter
TMR5
-
-
-
-
-
MR3
MR5
MR10
TMR3
Tolerance
MR1
Type / Code Unit
Mechanical Specifications
TCR x Resistance:
400
350
300
250
200
150
100
50
0
0.01 0.02 0.03 0.04 0.09 0.100.05 0.06 0.07 0.08
(Ohms)
(ppm/ºC)
MR1, MR3
MR5, MR10
Rev Date: 03/24/2011 3 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MR/MRS/TMR Series
Low Resistance Value Resistor – Molded 2 and 4 Leads Stackpole Electronics, Inc.
Resistive Product Solutions
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MR3FTR1 0 0
Size
MR 2 Leads 1 Code Code Quantity
TMR 4 Leads 3 F 2,000
MRS High Stability 5 J 750
10 500
250
1,000
500
100
"L" used as multiplier of
10
-3
for any value under
0.1 ohm.
0.01 ohm = 10L0
0.2 ohm = R200
0.005 ohm = 5L00
Product Series Power Tolerance Resistance ValuePackaging
Four characters with the
multiplier used as the
decimal holder.
3W
MR35W
Description Size
MR5
1W
T Tape and Reel
MR1
10W
MR10
B
Tol
1%
5%
MR10
TMR 3, 5
MR1, MR3, MR5
Bulk
How to Order
Legacy Part Number (before January 3, 2011):
Nominal
Code Resistance Tolerance
30.1 1%
T
y
pe Description Code Tolerance T
y
pe Pk
g
Qt
y
Description Code
MR 2 Leads 1 1% MR1 2,000
TMR 4 Leads 35% MR3 750
MRS High Stability 5 MR5 500
10 MR10 250
MR1, MR3, MR5 1,000
MR10 500
TMR3, TMR5 100
MR
SEI Type
R
B
Packaging
R
Tape and Reel
Bulk
