ALMR2728 Current Sense Resistor
Description
- Current Sensing
- Over current protection
- Servo motor control circuits
- Inverter power
- Electric control system
- Li-battery management system
- Low inductance ＜5nH (1MHz)
- Insulation resistance≥220MΩ（DC 500V 1min）
- AEC-Q200 qualified available
- RoHS compliant
Part Numbering System
| Type | Rated Power at 70°C | T.C.R. (ppm/°C) | Resistance Range (mΩ) 0.5%(D) 1.0%(F) 2.0%(G) 5.0%(J) |
Material | Operating Temperature (°C) |
|---|---|---|---|---|---|
| ALMR2725 | 4W | ±200 | 0.2 ~ 0.25 | FeCrAl / Manganin / Karma | -55°C ~ 170°C |
| ±100 | 0.5 | ||||
| 1 ~ 2 | |||||
| ±75 | 3 | ||||
| ALMR2728 | 5W | ±50 | 1 ~ 50 | ||
| 4W | ±50 |
construction
Unit: mm
| Type | Resistance (mΩ) | W (mm) | C (mm) | A (mm) | D (mm) |
|---|---|---|---|---|---|
| ALMR2725 | 0.2 ~ 0.25 | 6.8 ± 0.25 | 6.5 ± 0.25 | 1.7 ± 0.25 | 1.2 ± 0.1 |
| 0.5 | 1.2 ± 0.25 | ||||
| 1 ~ 2 | |||||
| 3 | 1.0 ± 0.25 | ||||
| ALMR2728 | 1 | 6.8 ± 0.2 | 7.2 ± 0.2 | 1.2 ± 0.2 | 1.0 ± 0.1 |
| 2 ~ 50 | 0.8 ± 0.1 |
Recommended land pattern
Unit: mm
| Type | Resistance (mΩ) | L | a | c |
|---|---|---|---|---|
| ALMR2725 | 0.2 ~ 0.25 | 1.32 | 3.18 | 6.86 |
| 0.5 ~ 3 | 3.12 | 2.28 | ||
| ALMR2728 | 1 | 4.5 | 3.0 | 7.8 |
| 2 ~ 50 |
Power Derating Curve
For resistors operated in ambient temperatures 70°C, power ratingshall bederated inaccording with the curve below:
Solder Reflow Temperature Condition
Product Characteristics
| Item | Test Condition / Method | Limit |
|---|---|---|
| Temperature Coefficient of Resistance |
Test was conducted from 20℃ to 120℃ while
20℃ worked as the reference.
|
Refer to spec |
| Short Time Overload | 5 × rated power for 5s | ±0.5% |
| Resistance to Soldering Heat | 260℃ ± 5℃ time：10sec± 1sec | ±0.5% |
| Temperature Cycling |
1000Cycle (-55℃ to 155℃)
|
±1% |
| High Temperature Storage |
1000hours at 170℃,No power
|
±1% |
| Bias Humidity |
1000hrs 85℃/85%RH。Note: Specified
conditions:10% of operating power.
|
±1% |
| Operational Life |
Condition D Steady State TA=125℃ at rated power
|
±1% |
| Solderability |
245℃ , 3s.
|
95% Coverage
Minimum
|
Tapping & Package
Unit: mm
| Type | A ±0.2 |
B ±0.2 |
W +0.3 |
F ±0.1 |
E ±0.1 |
P1 ±0.1 |
P2 ±0.1 |
P0 ±0.1 |
D0 ±0.1 |
t ±0.2 |
Quantity (pcs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2725 | 6.9 | 7.2 | 12.0 | 5.5 | 1.75 | 8.0 | 2.0 | 4.0 | 1.5 | 1.5 | 1,000 |
| 2728 | 7.7 | 7.1 | 16.0 | 7.5 | 1.75 | 12.0 | 2.0 | 4.0 | 1.5 | 1.3 |
Reel Specification
Unit: mm
| Type | A | N | W1 |
|---|---|---|---|
| 2725 | 178±2 | 60±1 | 12±1 |
| 2728 |