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Specifications
Power(Watts):
1W
Resistance:
510mΩ
Temperature Coefficient:
±200ppm/℃
Operating Temperature:
-55℃~+125℃
Type:
Thick Film Resistor
Tolerance:
±2%
Mfr. Part #:
73L7R51G
Package:
2512
Key Attributes
Model Number:
73L7R51G
Product Description
Product Overview
The 73Lx & 73Ex Series Current Sensing Resistors are ceramic packaged devices designed for accurate current detection. They offer excellent electrical and thermal characteristics, making them suitable for a wide range of applications including current limiting, regulated battery circuits, motor control, power supplies, and industrial equipment.
Product Attributes
- Brand: CTS Corporation
- Construction: Thick Film
- Terminal Finish: Matte Tin (e3)
- Packaging: Tape and Reel
- Certifications: RoHS Compliant in Accordance with EU Directive 2011/65/EU - Lead-Free Termination Finish - Exemption 7(c)-I
Technical Specifications
| Model Type | Power Rating @ +70C (Watts) | Resistance Range (milliohms) | Resistance Tolerance (%) | Operating Temperature Range (C) | Temperature Coefficient (ppm/C) | Working Voltage (maximum V) |
|---|---|---|---|---|---|---|
| 73L1 | 0.100 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L2 | 0.100 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L3 | 0.125 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L4 | 0.250 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L5 | 0.500 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L6 | 0.750 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73L7 | 1.000 | 100 - 910 | F=1, G=2, J=5 | -55 to +155 | 100, 200, 300 | 200 |
| 73E3 | 0.250 | 50 - 91 | F=1, J=5 | -55 to +155 | 100 | --- |
| 73E4 | 0.500 | 50 - 91 | F=1, J=5 | -55 to +155 | 100 | --- |
| 73E6 | 1.000 | 50 - 91 | F=1, J=5 | -55 to +155 | 100 | --- |
Environmental Specifications
| Test Description | Maximum Delta R (%) | Test Conditions |
|---|---|---|
| Thermal Cycle | 5.00 | 5 cycles -55C to +125C |
| Short Time Overload | 2.50 | 2 times rated working voltage for 5 seconds |
| Moisture Resistance | 3.00 | 240 hours; +40C, 90% RH |
| High Temperature Exposure | 3.00 | 1,000 hours @ +155C, no load |
| Load Life | 5.00 | 1,000 hours @ +70C, rated load |
| Resistance to Solder Heat | 3.00 | 10 seconds @ +260C solder |
| Solderability | - | RMA Flux, +230C, 5 seconds dip, 95% coverage |
Mechanical Specifications
| Model Type | Package Code | Dimensions [mm] L | Dimensions [mm] W | Dimensions [mm] t |
|---|---|---|---|---|
| 73L1 | 0402 [1005] | 2.00 0.10 | 0.25 0.10 | 0.70 |
| 73L2 | 0603 [1608] | 3.00 +0.20 -0.10 | 0.50 +0.15 -0.05 | 1.20 |
| 73L3 / 73E3 | 0805 [2012] | 4.00 +0.20 -0.10 | 1.25 +0.20 -0.10 | 1.65 |
| 73L4 / 73E4 | 1206 [3216] | 5.00 +0.10 -0.15 | 1.60 +0.10 -0.15 | 2.00 |
| 73L5 | 1210 [3225] | 5.00 +0.10 -0.15 | 2.60 +0.10 -0.15 | 2.90 |
| 73L6 / 73E6 | 2010 [5025] | 6.60 0.10 | 3.40 0.10 | 3.00 |
| 73L7 | 2512 [6432] | 8.20 0.10 | 6.60 0.10 | 3.70 |
Terminal Details: Base Metal - Silver [Ag] or Cooper [Cu] plate. Barrier Plating Nickel [Ni]. Finish Plating Matte Tin [Sn].
Packaging Information
Tape and Reel Packaging: Available in Paper Tape and Embossed Tape. Reel dimensions and quantity per reel vary by model type.
- Paper Tape [mm]: t: 0.50 0.10 (73L1), 0.70 0.10 (73L2), 0.80 0.20 (73L3/E3, 73L4/E4, 73L5), 1.00 0.10 (73L6/E6, 73L7)
- Embossed Tape [mm]: A: 2.90 0.10 (73L1), 1.65 0.20 (73L2), 1.10 0.20 (73L3/E3), 0.70 0.08 (73L4/E4), 1.20 0.08 (73L5), 2.905 0.10 (73L6/E6), 5.30 0.10 (73L7)
- Reel [mm]: M: 13.0 1.4 (73L1, 73L2, 73L3/E3, 73L4/E4, 73L5, 73L7), 17.0 1.4 (73L6/E6)
- Quantity Per Reel: 4,000 (73L1, 73L2), 5,000 (73L3/E3, 73L4/E4, 73L5, 73L6/E6), 10,000 (73L7)
2412111353_CTS-73L7R51G_C4328550.pdf
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