Metal Strip Low Ohm Power Chip Resistor (LRM)

Add To Inquiry Page

Metal Strip Low Ohm Power Chip Resistor (LRM)

Build DeMint (LRM) Power Low Ohmic Metal Strip resistors into your Design

Low ohm Power Metal Strip resistors from DeMint 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.

DeMint (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 (415KB) Metal Strip Low Ohm Chip Power Resistor (LRM).
Contact us with your specific needs.

Features :

Low TCR down to ±75PPM/°C.
Low resistance values from 1mΩ to 100mΩ.
High power rating from 1/8 Watts to 3 Watts
Wide range package sizes 0805, 1206, 2010, and 2512.

Applications :

For NB power management.
For MB power management.
For Monitor power management.
SWPS: DC-DC converter, Charger, Adaptor.

Construction (LRM)

Power Metal Strip Dimensions (LRM)

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
LRM05TE***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
LRM06T****M	2 ~ 30	MnCu	3.20±0.20	1.60±0.20	0.60±0.20	0.50±0.30	18.00
LRM10T****	5, 6, 10, 15, 20	NiCu	5.00±0.20	2.50±0.20	0.60±0.20	0.60±0.30	40.50
LRM12T****M	0.5, 0.75	MnCu	6.40±0.20	3.20±0.20	0.60±0.20	2.60±0.20	90.90
LRM12T****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
LRM12T****M	4 ~ 50	NiCu	6.40±0.20	3.20±0.20	0.60±0.20	0.90±0.20	90.90
LRM12T****	1, 1.5, 2, 3	NiCu	6.40±0.20	3.20±0.20	0.60±0.20	2.0±0.20	90.90
LRM12T****	2, 3, 4	NiCu	6.40±0.20	3.20±0.20	0.70±0.20	2.0±0.20	90.90
LRM12T****	10 ~ 100	NiCu	6.40±0.20	3.20±0.20	0.70±0.20	0.90±0.20	90.90

Notice : DeMint 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
	1W, 2W			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
LRM10 (2010)	1/2W, 3/4W, 1W, 1.5W			15, 20	±75
LRM12 (2512)	1W, 2W			1, 1.5	±275
	1W, 2W			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)

(LRM) Power Derating Curve

Recommend Land Pattern (LRM)

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

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

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

15.4±2.0

Paper Tape Specifications (LRM)

(LRM) Paper Tape Specifications

Type

A (mm)

B (mm)

W (mm)

E (mm)

F (mm)

P₀ (mm)

P₁ (mm)

P₂ (mm)

ΦD₀ (mm)

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

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

2.00±0.05

1.50+0.1/-0

0.84±0.10

Emboss Plastic Tape Specifications (LRM)

(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)

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

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

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

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.

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;