Metal Strip Low Ohm Power Chip Resistor (LRM)

Power Metal Strip Low Value Chip Resistor (LRM) Introduction

Build Token (LRM) Power Low Ohmic Metal Strip chip resistors with minimum power loss into your Design.

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  • Power Metal Strip resistors (LRM)

Low ohm Power Metal Strip resistors from Token Electronics offer a wide range of high-power current sensing applications including power DC-DC converter and charger, management of NB, MB and monitor, test & measurement instruments, linear power supplies and switching, automotive, shunts and power amplifiers.

(LRM) Design for applications that require a wide range power handling from 1/8W up to 3W and low resistance values from 1mΩ to 100mΩ and come with a range of advantages including a wide temperature range and a varied choice of wide range package sizes 0805, 1206, 2010, and 2512 with high current capability.

Token (LRM) is aiming for very high power-to-footprint size ratio, excellent frequency response and very low inductance in a solid metal nickel-chrome or manganese-copper allow resistive element with Low TCR ±75PPM/°C. Also, ideal for all types of voltage division, current sensing and pulse applications.

Downloads Complete Specification PDF Metal Strip Low Ohm Chip Power Resistor (LRM). Contact us with your specific needs.

Features :
  1. Low TCR down to ±75PPM/°C.
  2. Low resistance values from 1mΩ to 100mΩ.
  3. High power rating from 1/8 Watts to 3 Watts
  4. Wide range package sizes 0805, 1206, 2010, and 2512.
Applications :
  1. For NB power management.
  2. For MB power management.
  3. For Monitor power management.
  4. SWPS: DC-DC converter, Charger, Adaptor.

Construction (LRM)

Dimensions (LRM)Power Metal Strip Dimensions (LRM)
a b c d e f
Overcoat (molding) Marking Alloy Plate Internal Electrode (Cu) Barrier Layer (Ni) Solder Plating (Sn)

Dimensions Chip (LRM)

Part No. Resistance (mΩ) Material L (mm) W (mm) T (mm) D (mm) Weight(g)
1000pcs
LRM05*TE****M 5, 9, 10, 20 MnCu 2.00±0.10 1.25±0.10 0.60±0.20 0.40±0.20 15.00
LRM06*TFR001M 1 MnCu 3.20±0.20 1.60±0.20 0.75±0.20 1.10±0.30 18.00
LRM06*T*****M 2 ~ 30 MnCu 3.20±0.20 1.60±0.20 0.60±0.20 0.50±0.30 18.00
LRM10*T***** 5, 6, 10, 15, 20 NiCu 5.00±0.20 2.50±0.20 0.60±0.20 0.60±0.30 40.50
LRM12*T*****M 0.5, 0.75 MnCu 6.40±0.20 3.20±0.20 0.60±0.20 2.60±0.20 90.90
LRM12*T*****M 5, 10, 20, 25, 30, 40, 50 MnCu 6.40±0.20 3.20±0.20 0.60±0.20 0.90±0.20 90.90
LRM12*T*****M 4 ~ 50 NiCu 6.40±0.20 3.20±0.20 0.60±0.20 0.90±0.20 90.90
LRM12*T***** 1, 1.5, 2, 3 NiCu 6.40±0.20 3.20±0.20 0.60±0.20 2.0±0.20 90.90
LRM12*T***** 2, 3, 4 NiCu 6.40±0.20 3.20±0.20 0.70±0.20 2.0±0.20 90.90
LRM12*T***** 10 ~ 100 NiCu 6.40±0.20 3.20±0.20 0.70±0.20 0.90±0.20 90.90

Notice : TOKEN is capable of manufacturing the optional spec based on customer's requirement.

MnCu Material - Electrical Specifications (LRM)

Type Power Rating at 70°C Operating Temp. Range Resistance Tolerance (±%) Resistance (mΩ) TCR (±PPM/°C)
LRM05 (0805) 1/8W, 1/4W, 1/2W -55°C ~ +170°C ±1%, ±5% 5, 9,10, 20 ±100
LRM06 (1206) 1/4W, 1/2W, 1W 1 ±200
2, 3, 4, 5, 6, 7, 8, 9,10 ±100
12, 14, 15, 20, 22, 25, 30 ±75
LRM12 (2512) 1W, 2W 0.5, 0.75 ±200
5, 10 ±100
1W 20, 25, 30, 40, 50 ±75

NiCu Material - Electrical Specifications (LRM)

Type Power Rating at 70°C Operating Temp. Range Resistance Tolerance (±%) Resistance (mΩ) TCR (±PPM/°C)
LRM10 (2010) 1/2W, 3/4W, 1W, 1.5W -55°C ~ +170°C ±1%, ±5% 5, 6, 10 ±100
15, 20 ±75
LRM12 (2512) 1W, 2W 1, 1.5 ±275
2, 3, 4, 5, 6, 7, 8,10 ±100
1W 12, 15, 18, 20, 25, 30, 33, 35, 40, 50 ±75
1W, 2W, 3W 2, 3, 4, 10, 12, 15, 18, 20, 25, 30, 39,40, 50, 60, 70, 80, 100 ±75
  • Operating Current I = ( P / R ) , Operating Voltage V = ( P * R )
  • Optional specifications can be required.

Derating Curve (LRM)

Power Derating Curve(LRM) Power Derating Curve

Recommend Land Pattern (LRM)

Recommend Land Pattern
Recommend Land Pattern
Type A ±0.2(mm) B ±0.2(mm) C ±0.2(mm)
LRM05 1.20 1.15 1.40
LRM06 (1mΩ) 1.00 2.30 1.80
LRM06 (2mΩ ~ 30mΩ) 1.60 1.70 1.80
LRM10 3.50 1.50 3.40
LRM12 (0.5mΩ ~ 3mΩ) 1.30 3.10 4.00
LRM12 (4mΩ ~ 100mΩ) 4.10 2.10 4.00

*FR4 copper board, 100μm of copper pad thickness

Packing Quantity & Reel Specifications (LRM)

Reel Dimensions
Reel Dimensions
Type Packaging Quantity Tape Width Reel Diameter ΦA (mm) ΦB (mm) ΦC (mm) W (mm) T (mm)
LRM05 Paper 5,000 pcs 8 mm 7 inch 178.0±2.0 60.0±1.0 13.0±1.0 9.0.0±1.0 11.4±1.0
LRM06 Paper 5,000 pcs 8 mm 7 inch 178.0±2.0 60.0±1.0 13.0±1.0 9.0.0±1.0 11.5±1.0
LRM10 Embossed 4,000 pcs 12 mm 7 inch 178.0±2.0 60.0±1.0 13.0±1.0 13.0±1.0 15.5±1.0
LRM12 Embossed 4,000 pcs 12 mm 7 inch 180.0+0/-3 60.0±1.0 13.0±1.0 13.0±1.0 15.4±2.0

Paper Tape Specifications (LRM)

(LRM) Paper Tape Specifications(LRM) Paper Tape Specifications
Type A (mm) B (mm) W (mm) E (mm) F (mm) P0 (mm) P1 (mm) P2 (mm) ΦD0 (mm) T
LRM05 1.60±0.15 2.40±0.20 8.00±0.20 1.75±0.10 3.50±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.50+0.1/-0 0.84±0.10
LRM06 2.00±0.15 3.60±0.20 8.00±0.20 1.75±0.10 3.50±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.50+0.1/-0 0.84±0.10

Emboss Plastic Tape Specifications (LRM)

(LRM) Emboss Plastic Tape Specifications(LRM) Emboss Plastic Tape Specifications
Type A (mm) B (mm) W (mm) E (mm) F (mm) P0 (mm) P1 (mm) P2 (mm) ΦD0 (mm) ΦD1 (mm) T
LRM10 2.80±0.20 5.30±0.20 12.0±0.20 1.75±0.10 5.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.50+0.1, -0 1.50±0.25 0.85±0.15
LRM12 3.60±0.20 6.90±0.20 12.0±0.30 1.75±0.10 5.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.50+0.1, -0 1.50±0.25 0.85±0.15
LRM12 3.60±0.20 6.90±0.20 12.0±0.30 1.75±0.10 5.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.50+0.1, -0 1.50±0.25 1.20±0.15
Notice :

1. The cumulative tolerance of 10 sprocket hole pitch is ±0.2mm.
2. Carrier camber shall be not more than 1mm per 100mm through a length of 250mm.
3. A & B measured 0.3mm from the bottom of the packet.
4. T measured at a point on the inside bottom of the packet to the top surface of the carrier.
5. Pocket position relative to sprocket hole is measured as the true position of the pocket and not the pocket hole.

Soldering Condition (Reflow soldering only) (LRM)

Reflow soldering(LRM) Reflow Soldering

Environmental Characteristics (LRM)

Item Requirement Test Method
Thermal Shock
0805, 2010: ±0.5%
1206, 2512: ±1%
JIS-C-5201-1 4.19
IEC-60115-1 4.19
-55°C ~ 155°C, 300 cycles, 15min per extreme condition
Short Time Overload
0805, 2010, 2512: ±0.5%
1206: ±1%
IEC60115-1 4.13
JIS-C-5201-1 4.13
5*rated power for 5 seconds
Low Temperature Storage
0805, 2010, 2512: ±0.5%
1206: ±1%
IEC-60115-1 4.23.4
JIS-C-5201-1 4.23.4
at-55°C for 1000 hrs
Damp Heat no Load
2512 0.5mΩ, 0.75mΩ, 1206: ±0.5%
Other sizes: ±1.0%
IEC60115-1 4.24.2.1a
JIS-C-5201-1 4.24.2.1a
85°C, 85%RH, 1000 hrs
Bending Stength
±1%
IEC-60115-1 4.33
JIS-C-5201-1 4.33
Bending width 2mm once for 5 seconds
Endurance
±1%
IEC60115-1 4.25
JIS-C-5201-1 4.25.1
70±2°C, RCWV for 1000 hrs with 1.5 hrs “ON” and 0.5 hrs “OFF”
Dry Heat
±1%
IEC60115-1 4.23.2
JIS-C-5201-1 4.23.2
at +170°C for 1000 hrs
Resistance to Soldering Heat
±0.5%
IEC-60115-1 4.18
JIS-C-5201-1 4.18
0805, 2010: 260±5°C for 10 seconds
1206, 2512: 260±5°C for 20 seconds
Insulation Resistance
>100MΩ
IEC60115-1 4.6
JIS-C-5201-1 4.13
100V DC for 1 minute
Solderability
95% min coverage
IEC-60115-1 4.17
JIS-C-5201-1 4.17
245±5°C for 3 seconds
Temperature Coefficient of Resistance (T.C.R.)
As Spec.
IEC60115-1 4.8
JIS-C-5201-1 4.8
-55°C ~+125°C. (25°C is the reference temperature)
  • Rated continuous Working Voltage (RCWV) = Power Rating × Resistance Value (Ω) or Max. Operating voltage whichever is lower.
  • Storage Temperature: 25±3°C; Humidity < 80%RH;

Order Codes (LRM)

LRM 12 F TR D S R050  
Product Type
Dimensions
(L×W)(mm)
05 EIA0805
06 EIA1206
10 EIA2010
12 EIA2512
Resistance
Tolerance (%)
F ±1%
G ±2%
J ±5%
Package
TR Taping Reel
TCR (PPM/°C)
W ±75PPM/°C
E ±100PPM/°C
F ±200PPM/°C
3 ±275PPM/°C
Power Rating
W 1/8W
V 1/4W
O 1/3W
U 1/2W
Q 3/4W
T 1W
A 1.5W
S 2W
R 3W
Resistance (Ω)
R015 0.015Ω
R050 0.05Ω
R500 0.5Ω
Marking
N No Marking
M MnCu Material
NiCu Material