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Specifications
Resistance:
20mΩ
Power(Watts):
3W
Type:
Current Sense Resistor
Tolerance:
±1%
Mfr. Part #:
73M3BR020F
Package:
2726
Key Attributes
Model Number:
73M3BR020F
Product Description
CTS 73M Series Current Sensing Resistors
The 73M1A, 73M2A, 73M3x, and 73M5 Series Current Sensing Resistors are metal plate packaged devices designed for excellent accuracy in current detection. These resistors offer good electrical and thermal characteristics due to their special metallic resistor material. They are suitable for applications such as current detection, current limiting, regulated battery circuits, motor control, power supplies, hard disk drives, inverters/converters, industrial equipment, and infotainment systems.
Product Attributes
- Brand: CTS
- Construction: Metal Plate
- Material: Copper Alloy
- Terminal Finish: Matte Tin [e3]
- Reflow Capable: per JEDEC J-STD-020, +260C Maximum
- Packaging: Tape and Reel
- Certifications: JEDEC J-STD-020, JIS C 5201-1, MIL-STD-202
Technical Specifications
| Model Type | Power Rating [Watts] | Resistance Range [m] | Resistor Tolerance [%] | Rated Ambient Temperature | Operating Temperature Range | Temperature Coefficient |
|---|---|---|---|---|---|---|
| 73M1A | 1.0 | 0.25 - 50 | 1 | +70C | -55C to +155C | R < 0.010: 100ppm/C R 0.010: 50ppm/C |
| 73M2A | 2.0 | 1 - 75 | 1 | +70C | -55C to +155C | R < 0.010: 100ppm/C R 0.010: 50ppm/C |
| 73M3A | 3.0 | 0.25 - 3 | 1 | +70C | -55C to +155C | R 0.001: 200ppm/C R > 0.001: 100ppm/C |
| 73M3B | 3.0 | 4 - 100 | 1 | +70C | -55C to +155C | 50ppm/C |
| 73M5 | 5.0 | 1 - 120 | 1 | +70C | -55C to +155C | R < 0.010: 100ppm/C R 0.010: 50ppm/C |
Environmental & Electrical Specifications
| Test | Test Description | Maximum Delta R [%] |
|---|---|---|
| Temperature Coefficient | Standard temperature at +25C | |
| Measured temperature at +150C | ||
| Short-Time Overload | Applied electric power equal to 3 times rated power in 5s [JIS C 5201-1 4.13] | 0.5 [73M1A, 73M2A, 73M3x] 2.0 [73M5] |
| Insulation Resistance | Over 10 9 ohm Measured at terminals and center of resistor by D.C. 100V 15V in 1 minute [JIS C 5201-1 4.6] | |
| Dielectric Withstanding Voltage | No Breakdown Applied at terminals and center of resistor on A.C. 500V, 1 minute [JIS C 5201-1 4.7] | |
| Resistance to Solder Heat | No Damage Place on copper sheet [t = 0.2mm] heated by solder, +260C 5C, 5 0.5 seconds | 0.5 |
| Solderability | Over 95% Coverage Immerse terminal in solder [Sn3Ag0.5Cu], +245C 0.5C, 3 0.5 seconds [JIS C 5201-1 4.17] | |
| Vibration | No Damage Frequency 10Hz to 55Hz, Pk-Pk amplitude 15mm, sweeping rate 1 minute, 3 directions each 2 hours [JIS C 5201-1 4.22] | 0.5 |
| Resistance to Solvent | No Damage Immerse in Isopropyl alcohol, +20C to +25C, 60 5 seconds | |
| High Temperature Exposure | 1,000 hours @ +155C 2C, bias load 0% power [JIS C 5201-1 4.23.2] | 2.0 |
| Change of Temperature | 30 minutes @ -55C, 3 minutes @ +25C, 30 minutes @ +155C, 3 minutes @ +25C; 5 cycles | 0.5 |
| Moisture Resistance | MIL-STD-202, Method 106, 0% power 7a and 7b not required, 1 cycle = 24 hours, 10 cycles | 1.0 |
| Bias Humidity | 1,000 hours @ +85C 2C, 85% relative humidity, bias load 10%, on time 90 minutes/off time 30 minutes | 1.0 |
| Endurance [Rated Load] | 1,000 hours @ +70C 3C, bias load, on time 90 minutes/off time 30 minutes | 2.0 |
Mechanical Specifications
| Model Type | Dimensions [mm] L | Dimensions [mm] W | Dimensions [mm] t | Resistance [m] |
|---|---|---|---|---|
| 73M1A | 3.2 0.3 | 1.6 0.3 | 0.6 0.3 | 0.25 - 50 |
| 73M2A | 6.3 0.3 | 3.2 0.3 | 1.0 - | 1 - 75 |
| 73M3A | 6.8 0.3 | 6.5 0.3 | 1.2 Max. | 0.25 - 3 |
| 73M3B | 7.2 0.3 | 6.7 0.3 | 1.3 Max. | 4 - 100 |
| 73M5 | 11.4 0.3 | 6.9 0.3 | 1.8 Max. | 1 - 120 |
2411201003_CTS-73M3BR020F_C4325370.pdf
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