LESR 25-NP Hall Effect Current Sensor Equivalent & Substitute Parts

Part Overview

The LESR 25-NP is a Hall Effect closed-loop bidirectional current sensor manufactured by LEM USA Inc., designed for AC/DC current measurement applications requiring 25A sensing capability. This sensor delivers ratiometric voltage output with 25mV/A sensitivity and operates across industrial temperature ranges from -40°C to 105°C. The product maintains Active status with full RoHS compliance and REACH unaffected designation, making it suitable for regulated industrial and commercial applications. Equivalent substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and supply chain availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	LESR 25-NP
Manufacturer	LEM USA Inc.
Series	LESR
Current Sensing Range	25A
Sensor Type	Hall Effect, Closed Loop
Polarization	Bidirectional
Number of Channels	1
Output Type	Ratiometric, Voltage
Sensitivity	25mV/A
Accuracy	±1.25%
Linearity	±0.1%
Frequency Response	300kHz
Response Time	400ns
Supply Voltage	4.75V ~ 5.25V
Supply Current (Max)	32.5mA
Operating Temperature	-40°C ~ 105°C
Mounting Type	Through Hole
Package Type	Module
Packaging Format	Tray
Product Status	Active
RoHS Compliance	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LESR 25-NP are identified through strict parametric equivalence matching. The substitution logic is based on the following critical parameters that must remain identical across all equivalent parts:

Electrical Performance Parameters:

Current sensing range: 25A
Sensor technology: Hall Effect, Closed Loop
Polarization mode: Bidirectional
Output configuration: Ratiometric, Voltage
Sensitivity: 25mV/A
Accuracy: ±1.25%
Linearity: ±0.1%
Frequency response: 300kHz
Response time: 400ns
Supply voltage range: 4.75V ~ 5.25V
Maximum supply current: 32.5mA

Mechanical & Environmental Parameters:

Number of channels: 1
Mounting type: Through Hole
Package type: Module
Operating temperature range: -40°C ~ 105°C
Moisture sensitivity level: 1 (Unlimited)

Compliance & Status Parameters:

Product status: Active
RoHS compliance: RoHS Compliant
REACH status: REACH Unaffected

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	LESR 25-NP	LKSR 25-NP	Match Status
Manufacturer	LEM USA Inc.	LEM USA Inc.	Identical
Current Sensing	25A	25A	Identical
Sensor Type	Hall Effect, Closed Loop	Hall Effect, Closed Loop	Identical
Polarization	Bidirectional	Bidirectional	Identical
Number of Channels	1	1	Identical
Output Type	Ratiometric, Voltage	Ratiometric, Voltage	Identical
Sensitivity	25mV/A	25mV/A	Identical
Accuracy	±1.25%	±1.25%	Identical
Linearity	±0.1%	±0.1%	Identical
Frequency Response	300kHz	300kHz	Identical
Response Time	400ns	400ns	Identical
Supply Voltage	4.75V ~ 5.25V	4.75V ~ 5.25V	Identical
Supply Current (Max)	32.5mA	32.5mA	Identical
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package Type	Module	Module	Identical
Product Status	Active	Active	Identical
RoHS Compliance	RoHS Compliant	RoHS Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The LKSR 25-NP is a direct parametric equivalent to the LESR 25-NP. Both parts are manufactured by LEM USA Inc. and share identical electrical, mechanical, and environmental specifications. Selection between these two parts is based on supply chain availability and inventory status rather than technical performance differences.

Both parts maintain Active product status, ensuring long-term availability and manufacturer support. Both are RoHS Compliant and REACH Unaffected, meeting regulatory requirements for industrial and commercial applications. The identical moisture sensitivity level (MSL 1 - Unlimited) indicates both parts are suitable for standard storage and handling conditions without special moisture control requirements.

For applications requiring the LESR 25-NP, the LKSR 25-NP provides equivalent performance with no circuit redesign or recalibration necessary. Pin-to-pin compatibility and functional equivalence are confirmed across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the LKSR 25-NP be used as a direct replacement for the LESR 25-NP?

A: Yes. The LKSR 25-NP is a parametric equivalent with identical electrical performance, output characteristics, and mechanical specifications. No circuit modifications are required for substitution.

Q: Are there any differences in accuracy or linearity between these parts?

A: No. Both the LESR 25-NP and LKSR 25-NP deliver ±1.25% accuracy and ±0.1% linearity. Measurement performance is equivalent.

Q: Do both parts have the same supply voltage requirements?

A: Yes. Both parts operate within the 4.75V to 5.25V supply voltage range and draw a maximum of 32.5mA supply current.

Q: Are the mounting and package specifications identical?

A: Yes. Both parts use Through Hole mounting, Module package type, and are supplied in Tray packaging format.

Q: What is the operating temperature range for both parts?

A: Both the LESR 25-NP and LKSR 25-NP operate across -40°C to 105°C ambient temperature range.

Q: Do both parts meet RoHS and REACH compliance requirements?

A: Yes. Both parts are RoHS Compliant and REACH Unaffected, meeting regulatory requirements for regulated markets.

Q: Is there a difference in response time or frequency response between these sensors?

A: No. Both parts deliver 400ns response time and 300kHz frequency response capability.

Q: What is the sensitivity specification for both parts?

A: Both the LESR 25-NP and LKSR 25-NP provide 25mV/A sensitivity for 25A current sensing applications.

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