HLSR 32-SM Hall Effect Current Sensor Equivalent & Substitute Parts

Part Overview

The HLSR 32-SM is an active Hall Effect current sensor manufactured by LEM USA Inc., designed for AC/DC current measurement applications requiring open-loop bidirectional sensing. This surface-mount module sensor operates at 32A nominal sensing capacity with ratiometric voltage output and is classified as an Active product with full RoHS compliance.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for this sensor category, or when application requirements permit operation at reduced current ratings while maintaining core functional characteristics.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Current Sensing Rating	32A	A	Primary differentiator; determines maximum measurable current
Sensor Type	Hall Effect, Open Loop	—	Core technology; must match for functional equivalence
Output Type	Ratiometric, Voltage	—	Signal interface; must be compatible with system requirements
Sensitivity	25	mV/A	Determines output signal magnitude per ampere
Supply Voltage	5V	V	Power requirement; affects circuit compatibility
Accuracy	±1%	—	Measurement precision specification
Linearity	±0.5%	—	Output linearity across measurement range
Operating Temperature	-40 to 105	°C	Environmental operating range
Mounting Type	Surface Mount	—	PCB assembly compatibility
Polarization	Bidirectional	—	Directional current sensing capability

Substitute Part Grouping Explanation

Substitution logic for the HLSR 32-SM is based on the following allowed parameters:

Matching Criteria (Required for Substitution):

Sensor Type: Hall Effect, Open Loop
Output Type: Ratiometric, Voltage
Mounting Type: Surface Mount
Polarization: Bidirectional
Accuracy: ±1%
Linearity: ±0.5%
Operating Temperature Range: -40°C to 105°C
Frequency Response: 400kHz
Response Time: 2.5µs
RoHS Compliance: Yes
Manufacturer: LEM USA Inc.

Variable Parameters (Allowed to Differ):

Current Sensing Rating: May be lower if application permits
Supply Voltage: May differ if system supports alternative voltage
Sensitivity: Varies with current rating; proportional relationship acceptable
Maximum Supply Current: Within specified range

The HLSR 20-SM/SP33 qualifies as a parametric equivalent substitute when the application current requirement does not exceed 20A and the system power supply supports 3.3V operation.

Parameter Comparison

Parameter	HLSR 32-SM	HLSR 20-SM/SP33	Compatibility Notes
Manufacturer	LEM USA Inc.	LEM USA Inc.	Same manufacturer; consistent quality standards
Sensor Type	Hall Effect, Open Loop	Hall Effect, Open Loop	Identical technology
Current Sensing	32A	20A	HLSR 20-SM/SP33 rated for lower current; suitable for applications ≤20A
Output Type	Ratiometric, Voltage	Ratiometric, Voltage	Identical output interface
Sensitivity	25 mV/A	23 mV/A	Proportional to current rating; minor difference acceptable
Supply Voltage	5V	3.3V	Different supply requirement; system must support 3.3V
Accuracy	±1%	±1%	Identical specification
Linearity	±0.5%	±0.5%	Identical specification
Frequency	400kHz	400kHz	Identical bandwidth
Response Time	2.5µs	2.5µs	Identical response characteristic
Operating Temperature	-40 to 105°C	-40 to 105°C	Identical range
Polarization	Bidirectional	Bidirectional	Identical directional capability
Mounting Type	Surface Mount	Surface Mount	Identical PCB assembly method
Max Supply Current	25mA	25mA	Identical power consumption
RoHS Status	RoHS Compliant	RoHS Compliant	Both meet environmental standards
Product Status	Active	Active	Both actively manufactured and supported

Engineering Selection Recommendations

HLSR 32-SM Selection Criteria:

Applications requiring current measurement up to 32A
Systems with 5V power supply availability
Designs requiring maximum sensitivity at 25mV/A output
Full-range current sensing without derating

HLSR 20-SM/SP33 Selection Criteria:

Applications with maximum current requirement of 20A or less
Systems with 3.3V power supply (typical in modern digital circuits)
Designs compatible with 23mV/A sensitivity specification
Space-constrained applications where lower current rating is acceptable

Both parts maintain identical accuracy (±1%), linearity (±0.5%), response time (2.5µs), and operating temperature range (-40°C to 105°C). Both are Active products with full RoHS compliance and REACH unaffected status. Selection between these parts is determined by application current requirements and available system supply voltage.

Frequently Asked Questions (FAQ)

Q: Can HLSR 20-SM/SP33 be used in place of HLSR 32-SM in all applications?

A: No. The HLSR 20-SM/SP33 is rated for maximum 20A sensing. It can only substitute the HLSR 32-SM when the application current requirement does not exceed 20A. Additionally, the system power supply must support 3.3V operation instead of 5V.

Q: What is the difference in sensitivity between these two sensors?

A: HLSR 32-SM provides 25mV/A sensitivity, while HLSR 20-SM/SP33 provides 23mV/A sensitivity. This difference is proportional to their respective current ratings and is within normal design tolerance for equivalent sensor families.

Q: Are both sensors compatible with the same PCB footprint?

A: Both sensors use Surface Mount packaging and are manufactured by LEM USA Inc. in the HLSR-SM series. Mechanical compatibility should be verified against specific package drawings, as the input does not provide detailed dimensional specifications.

Q: What is the impact of different supply voltages on system design?

A: The HLSR 32-SM requires 5V supply, while HLSR 20-SM/SP33 requires 3.3V supply. The choice affects power supply design and signal conditioning circuits. Both draw maximum 25mA supply current.

Q: Can these sensors measure AC and DC current?

A: Yes. Both HLSR 32-SM and HLSR 20-SM/SP33 are specified for AC/DC current measurement with bidirectional polarization, allowing measurement of current flow in both directions.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are RoHS Compliant, REACH Unaffected, and classified under ECCN EAR99. Both maintain Active product status with identical environmental and regulatory compliance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message