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ACS72981LLRATR-100U3 Current Sensor Large Carrier 0A to 100A, 3.3V
This is the large version of a simple carrier for Allegro’s ACS72981LLRATR-100U3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix | Range | Supply Voltage | Sensitivity @ 3.3 V | Zero Point @ 3.3 V | Size |
|---|---|---|---|---|---|
| 100U3 | 0-100 A (unidirectional) | 3.0 V to 3.6 V | 26.4 mV/A | 0.33 V | 1.4″×1.2″ |
Alternatives available with variations in these parameter(s): typical operating voltage current range size Select variant…
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| Description | Specs (12) | Pictures (14) | Resources (6) | FAQs (0) | On the blog (0) | Distributors (0) |
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Dimensions
| Size: | 1.4″ × 1.2″ |
|---|---|
| Weight: | 4.2 g |
General specifications
| Typical operating voltage: | 3.3 V |
|---|---|
| Current sense: | 26.4 mV/A1 |
| Minimum logic voltage: | 3.0 V |
| Maximum logic voltage: | 3.6 V |
| Supply current: | 14 mA2 |
| Current range: | 0A to 100A (unidirectional 100A), 3.3V |
| Current sensor: | Allegro ACS72981LLRATR-100U3 |
Identifying markings
| PCB dev codes: | cs04b |
|---|---|
| Other PCB markings: | 0J14823 |
| Other PCB markings: | 3V3 U10 |


















