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CT432/CT433 TMR Current Sensor Compact Carriers
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CT432/CT433 TMR Current Sensor Compact Carrier pinout. |
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We are offering these breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their CT432/CT433 tunneling magnetoresistance (TMR), electrically isolated, high-bandwidth current sensors that are optimized for high dV/dt applications. The following list details some of the sensors’ key features:
- CT432/CT433 sensors use Allegro’s patented XtremeSense™ TMR (tunneling magnetoresistance) technology for high accuracy, high bandwidth, electrically isolated current measurements.
- Sensor can be inserted anywhere along the current path and be used in applications that require electrical isolation.
- 1 mΩ primary current path resistance in the sensor IC, and the PCB is made with 2-layer (compact versions under 50A), 4-layer (compact versions 50A and up), or 6-layer (large versions) 2-oz copper, so very little power is lost in the module.
- TMR sensing rejects common-mode fields, so the orientation of the sensor relative to uniform external magnetic fields (e.g. the Earth’s magnetic field) has less effect on the measurement.
- Optimized for high dV/dt applications, allowing the sensor to be used in switching applications.
- High-bandwidth 1 MHz analog output voltage proportional to AC or DC currents.
- Typical 300 ns response time.
- Output is not ratiometric (i.e. the zero point and sensitivity are independent of the actual supply voltage), which provides immunity from noisy supplies.
- Optional overcurrent fault output indicates when the current magnitude exceeds 110% of the maximum linear sensing range.
- Operating temperature range of -40°C to 125°C.
- Compact (0.8″×1.1″), 2-layer carrier board offers a variety of ways to insert it into the current path along with 0.1″-pitch (breadboard-compatible) power, ground, and output pins.
- 3.3V (CT433) and 5V (CT432) versions available.
These sensors are the compact versions, which feature smaller 0.8″×1.1″, 2- or 4-layer PCBs for integration into more space-constrained applications or for evaluation of the IC’s performance with a smaller PCB area and fewer copper layers for thermal dissipation. Larger versions with a 6-layer PCB are also available with space for larger connectors and thicker wires for the high-current path.
The following table lists the available CT432/CT433 compact carrier options:
| Pololu Item # |
Part Prefix | Supply Voltage (V) |
Part Suffix | Current Range |
Sensitivity (mV/A) |
Zero Point | PCB Details |
Price | ||
|---|---|---|---|---|---|---|---|---|---|---|
 Compact Carrier (0.8″×1.1″) |
#5310 | CT433 | 3.0 to 3.6 (3.3 nominal) |
20MR | Bidirectional | ±20 A | 50 | 1.65 V | 2 layers, 2-oz copper |
$8.95 |
| #5311 | 30MR | ±30 A | 33.3 | |||||||
| #5313 | 50MR | ±50 A | 20 | 4 layers, 2-oz copper |
$9.95 | |||||
| #5315 | 70MR | ±70 A | 14.3 | |||||||
| #5316 | 20DR | Unidirectional | 0-20 A | 100 | 0.65 V | 2 layers, 2-oz copper |
$8.95 | |||
| #5317 | 30DR | 0-30 A | 66.7 | |||||||
| #5318 | 50DR | 0-50 A | 40 | 4 layers, 2-oz copper |
$9.95 | |||||
| #5319 | 65DR | 0-65 A | 30.8 | |||||||
| #5300 | CT432 | 4.75 to 5.5 (5 nominal) |
20MR | Bidirectional | ±20 A | 100 | 2.5 V | 2 layers, 2-oz copper |
$8.95 | |
| #5301 | 30MR | ±30 A | 66.7 | |||||||
| #5302 | 50MR | ±50 A | 40 | 4 layers, 2-oz copper |
$9.95 | |||||
| #5303 | 65MR | ±65 A | 30.8 | |||||||
| #5304 | 20DR | Unidirectional | 0-20 A | 200 | 0.5 V | 2 layers, 2-oz copper |
$8.95 | |||
| #5305 | 30DR | 0-30 A | 133.3 | |||||||
| #5306 | 50DR | 0-50 A | 80 | 4 layers, 2-oz copper |
$9.95 | |||||
| #5308 | 70DR | 0-70 A | 57.1 | |||||||
Alternatives available with variations in these parameter(s): current range Select variant…
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Products in category “CT432/CT433 TMR Current Sensor Compact Carriers”
| Pololu item #: 5300 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the compact version of a simple carrier for Allegro’s CT432-HSWF20MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 20MR | ±20 A (bidirectional) | 4.75 V to 5.5 V | 100 mV/A | 2.5 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5301 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the compact version of a simple carrier for Allegro’s CT432-HSWF30MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 30MR | ±30 A (bidirectional) | 4.75 V to 5.5 V | 66.7 mV/A | 2.5 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5302 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the compact version of a simple carrier for Allegro’s CT432-HSWF50MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 50MR | ±50 A (bidirectional) | 4.75 V to 5.5 V | 40 mV/A | 2.5 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5303 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the compact version of a simple carrier for Allegro’s CT432-HSWF65MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 65MR | ±65 A (bidirectional) | 4.75 V to 5.5 V | 30.8 mV/A | 2.5 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5304 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the compact version of a simple carrier for Allegro’s CT432-HSWF20DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 20DR | 0-20 A (unidirectional) | 4.75 V to 5.5 V | 200 mV/A | 0.5 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5305 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT432-HSWF30DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 30DR | 0-30 A (unidirectional) | 4.75 V to 5.5 V | 133.3 mV/A | 0.5 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5306 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT432-HSWF50DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 50DR | 0-50 A (unidirectional) | 4.75 V to 5.5 V | 80 mV/A | 0.5 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5308 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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|
|
This is the compact version of a simple carrier for Allegro’s CT432-HSWF70DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT432 | 70DR | 0-70 A (unidirectional) | 4.75 V to 5.5 V | 57.1 mV/A | 0.5 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5310 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF20MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 20MR | ±20 A (bidirectional) | 3.0 V to 3.6 V | 50 mV/A | 1.65 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5311 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF30MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 30MR | ±30 A (bidirectional) | 3.0 V to 3.6 V | 33.3 mV/A | 1.65 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5313 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF50MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 50MR | ±50 A (bidirectional) | 3.0 V to 3.6 V | 20 mV/A | 1.65 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5315 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF70MR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 70MR | ±70 A (bidirectional) | 3.0 V to 3.6 V | 14.3 mV/A | 1.65 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5316 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF20DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 20DR | 0-20 A (unidirectional) | 3.0 V to 3.6 V | 100 mV/A | 0.65 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5317 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF30DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 30DR | 0-30 A (unidirectional) | 3.0 V to 3.6 V | 66.7 mV/A | 0.65 V | 0.8″×1.1″ | 2 |
| Pololu item #: 5318 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF50DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 50DR | 0-50 A (unidirectional) | 3.0 V to 3.6 V | 40 mV/A | 0.65 V | 0.8″×1.1″ | 4 |
| Pololu item #: 5319 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the compact version of a simple carrier for Allegro’s CT433-HSWF65DR TMR-based, electrically isolated current sensor that is optimized for high dV/dt applications and offers a high 1 MHz bandwidth with low noise. The typical primary current path resistance of the sensor IC is 1 mΩ.
| Part Prefix | Part Suffix | Range | Supply Voltage | Sensitivity | Zero Point | Size | PCB layers |
|---|---|---|---|---|---|---|---|
| CT433 | 65DR | 0-65 A (unidirectional) | 3.0 V to 3.6 V | 30.8 mV/A | 0.65 V | 0.8″×1.1″ | 4 |
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