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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) | ||||||
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| a | b | c | d | e | f | |
| Overcoat (molding) | Marking | Alloy Plate | Internal Electrode (Cu) | Barrier Layer (Ni) | Solder Plating (Sn) | |
Power Metal Strip Dimensions (LRM)| 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 : 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 | ||
| 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) | |
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(LRM) Power Derating Curve| Recommend Land Pattern (LRM) | ||||
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| 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) | |||||||||
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| 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) | |||||||||||
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| 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 | |
(LRM) Paper Tape Specifications| Emboss Plastic Tape Specifications (LRM) | ||||||||||||
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| 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 | |
(LRM) Emboss Plastic Tape Specifications| 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) | |
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(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 | N | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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