Metal Alloy Zero Ohm Jumper Chip Resistors (LRJ)
A zero ohm resistor is often called SMD jumper resistors, milli-ohm resistor, or zero ohm link resistors which are designed to link to circuits to together just like any other wire.
DeMint's true metal alloy strip zero ohm resistors (LRJ) make options with a lot less space and cost than DIP switches and jumper headers. These high current metal alloy jumper resistor chips (LRJ) SMT series, designed to replace zero ohm resistors without changing board designs or layouts.The devices could also be applied in high power applications to replace jumper wire for better stability or buried copper coin PCB for cost saving.
Five jumpers for the different resistor chip sizes are provided a wide range of standard dimensions 1206, 2512, 2817, 2725, and 4527 to make ease of designs along with footprint template compatibility. DeMint (LRJ) SMD metal alloy current jumper resistors designed for applications that require high power handling (Up to 5W) with resistance < 0.2mΩ at operating temperature range -55°C~+150°C. (LRJ). These new products are distinctively suited as true zero ohm resistor replacements.
DeMint (LRJ) resistor chip jumpers manufactured from metal alloy plate and designed to deliver a extremely low impedance and profile circuit linkage as a zero ohm resistor. Chip jumpers are packaged on tape and reel for compatibility with most vacuum or mechanical pick and place assembly systems. These (LRJ) SMD devices are also suitable for high current, high-density PCB packages on power and aluminum backplanes.
Some circuit boards are designed with multiple functions and configurations in one design. Often these functions and configurations can't coexist in single circuit because they will conflict with each other. To this end, more and more designers use (LRJ) resistor SMD jumpers for single side PCB that has no through-hole but for double-sided PCB. An application is used as a dummy, when through-holes for a not- yet- designed- resistor are prepared by way of precaution, and the holes are short-circuited after all.
DeMint Electronics delivers the right chip for your low range, current-sense applications. For more detailed product information and data sheets or to discuss your specific requirements please contact DeMint Electronics. Downloads Complete Specification PDF Metal Alloy Zero Ohm Jumper link Resistors (LRJ).
- High current application with Low profile.
- Ultra-Low resistance values, 0.2 mΩ Max.
- operating temperature range -55°C~+150°C.
- Wide range package sizes 1206, 2512, 2817, 2725, and 4527.
- Electrical tools, Power Management
- NB, Mobil Device, Server, Portable Devices
- Automotive, Industrial, Consumer Electronics, Electric Instrument
| Zero Ohm Resistors (LRJ) Construction & Dimensions | |||||||||||||
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| Type | Power Rating at 70℃(W) | Dimensions (Unit: mm) | |||||||||||
| L | W | T | D | ||||||||||
| LRJ1206 | 1 | 3.200±0.254 | 1.650±0.254 | 0.670±0.254 | 0.508±0.254 | ||||||||
| LRJ2512 | 2 | 6.350±0.254 | 3.050±0.254 | 0.670±0.254 | 1.100±0.254 | ||||||||
| LRJ2817 | 3 | 7.100±0.254 | 4.200±0.254 | 0.770±0.254 | 1.500±0.254 | ||||||||
| LRJ2725 | 4 | 6.800±0.254 | 6.350±0.254 | 0.770±0.254 | 1.800±0.254 | ||||||||
| LRJ4527 | 5 | 11.300±0.500 | 6.600±0.500 | 0.770±0.254 | 2.000±0.254 | ||||||||
| Zero Ohm Chip Resistors (LRJ) Electrical Specifications | ||||
| Type | Power Rating at 70°C | Max. Rating Current (A)* | Resistance (mΩ) | Operating Temperature °C |
| LRJ1206 | 1 | 70.7 | < 0.2 | -55~+150°C |
| LRJ2512 | 2 | 100 | < 0.2 | |
| LRJ2817 | 3 | 122 | < 0.2 | |
| LRJ2725 | 4 | 140 | < 0.2 | |
| LRJ4527 | 5 | 158 | < 0.2 | |
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| Zero Ohm Chips (LRJ) Recommend Land Pattern | |||||
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| Type | Maximum Power Rating (Watts) | Dimensions (Unit: mm) | |||
| a | b | i | |||
| LRJ1206 | 1 | 1.00 | 1.90 | 1.40 | |
| LRJ2512 | 2 | 2.11 | 3.68 | 3.18 | |
| LRJ2817 | 3 | 2.45 | 4.60 | 3.11 | |
| LRJ2725 | 4 | 2.34 | 6.86 | 3.00 | |
| LRJ4527 | 5 | 3.40 | 8.74 | 6.43 | |
| Reel Specifications (LRJ) (Unit: mm) | |||||||
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| Reel Type / Tape | W | M | A | B | C | D | |
| 7” reel for 8 mm embossed (LRJ1206 series only) |
12.00± 0.5 | 178 ± 1.0 | 2.0 ± 0.5 | 13.2 ± 0.5 | 17.7 ± 0.5 | 60.0 ± 0.5 | |
| 7” reel for 12 mm embossed LRJ2512, LRJ2725, LRJ2817 |
16.2 ± 0.5 | 178 ± 1.0 | 2.5 ± 0.5 | 13.5 ± 0.5 | 17.7 ± 0.5 | 60.0 ± 0.5 | |
| 7” reel for 24 mm embossed (LRJ4527 series only) |
24.4 +2/-0 | 178 ± 1.0 | 2.0 ± 0.5 | 13.2 ± 0.5 | 17.7 ± 0.5 | 60.0 ± 0.5 | |
| Emboss Plastic Tape Specifications (LRJ) (Unit: mm) | ||||||||||||
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| Type | A±0.1 | B±0.1 | W±0.3 | E±0.1 | F±0.1 | P0±0.1 | P1±0.3 | P2±0.1 | ΦD0±0.05 | ΦD1±0.1 | T±0.1 | |
| LRJ1206 | 2.03 | 3.55 | 8.0 | 1.75 | 3.5 | 4.0 | 4.0 | 2.0 | 1.55 | 1.00 | 1.00 | |
| LRJ2512 | 3.50 | 6.75 | 12.0 | 1.75 | 5.5 | 4.0 | 4.0 | 2.0 | 1.55 | 1.55 | 0.90 | |
| LRJ2725 | 6.81 | 7.16 | 12.0 | 1.75 | 5.5 | 4.0 | 8.0 | 2.0 | 1.55 | 1.55 | 1.05 | |
| LRJ2817 | 4.60 | 7.50 | 12.0 | 1.75 | 5.5 | 4.0 | 8.0 | 2.0 | 1.55 | 1.55 | 1.20 | |
| LRJ4527 | 7.38 | 12.0 | 24.0 | 1.75 | 11.5 | 4.0 | 12.0 | 2.0 | 1.55 | 1.55 | 1.05 | |
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| Packaging Quantity (LRJ) | |||
| Type | Tape Width | Diameter | Piece/Reel |
| LRJ1206 | 8 mm/embossed plastic | 178 mm/7” | 5,000 |
| LRJ2512 | 12 mm/embossed plastic | 178 mm/7” | 4,000 |
| LRJ2725 | 12 mm/embossed plastic | 178 mm/7” | 2,000 |
| LRJ2817 | 12 mm/embossed plastic | 178 mm/7” | 1,000 |
| LRJ4527 | 24 mm/embossed plastic | 178 mm/7” | 1,000 |
| Derating Curve (LRJ) |
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| Soldering Condition (Reflow Only) (LRJ) |
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| Environmental Characteristics (LRJ) | ||
| Item | Requirement | Test Method |
| Short Time Overload |
≤0.2 mΩ
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JIS C 5201-1 4.13 4 times rated power duration: 5secs. |
| Load Life |
≤0.2 mΩ
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JIS-C5201-1 4.25 70±2°C, RCWV for 1000 Hrs. with 1.5 Hrs. “ON” and 0.5 Hr. “OFF” |
| Bias Humidity |
≤0.2 mΩ
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JIS-C5201-1 4.24 +85°C/85%RH for 1,000Hrs. with 1.5Hrs “ON”, 0.5Hr “OFF”. |
| High Temperature Exposure (Storage) |
≤0.2 mΩ
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JIS-C5201-1 4.23.2 +150°C for 1000 Hrs. |
| Solderability |
95% Min. coverage
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JIS-C5201-1 4.17 245±5°C for 3 seconds |
| Temperature Cycling |
≤0.2 mΩ
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JIS-C5201-1 4.19 -55°C ~ 150°C, 100 cycles |
| Order Codes (LRC) | ||||||||||||||||||||||||||||||||||||||
| LRJ | 1206 | TR | T | R000 | ||||||||||||||||||||||||||||||||||
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