LESR 50-NP Hall Effect Current Sensor Equivalent & Substitute Parts

Part Overview

The LESR 50-NP is an active Hall Effect current sensor manufactured by LEM USA Inc., designed for AC/DC current measurement applications requiring closed-loop bidirectional sensing. This module provides ratiometric voltage output with 50A sensing capability and is classified as an Active product status component. Equivalent and substitute parts are identified when identical electrical performance parameters and mechanical compatibility are maintained across the sensor's operational specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	LESR 50-NP
Manufacturer	LEM USA Inc.
Series	LESR
Sensor Type	Hall Effect, Closed Loop
Current - Sensing	50A
Number of Channels	1
Output Type	Ratiometric, Voltage
Sensitivity	12.5mV/A
Frequency	300kHz
Linearity	±0.1%
Accuracy	±1.25%
Voltage - Supply	4.75V ~ 5.25V
Response Time	400ns
Current - Supply (Max)	51.3mA
Operating Temperature	-40°C ~ 105°C (TA)
Polarization	Bidirectional
Mounting Type	Through Hole
Package / Case	Module
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the LESR 50-NP is determined by strict equivalence across the following critical parameters:

Electrical Performance Parameters:

Current sensing range: 50A
Output configuration: Ratiometric voltage
Sensitivity: 12.5mV/A
Frequency response: 300kHz
Linearity: ±0.1%
Accuracy: ±1.25%
Supply voltage range: 4.75V ~ 5.25V
Response time: 400ns
Maximum supply current: 51.3mA

Mechanical & Environmental Parameters:

Sensor type: Hall Effect, Closed Loop
Polarization: Bidirectional
Number of channels: 1
Mounting type: Through Hole
Package type: Module
Operating temperature range: -40°C ~ 105°C

Compliance Parameters:

RoHS Compliant status
REACH Unaffected status
MSL rating: 1 (Unlimited)

The LKSR 50-NP qualifies as a parametric equivalent substitute because it maintains identical values across all electrical performance, mechanical, environmental, and compliance parameters listed above.

Parameter Comparison

Parameter	LESR 50-NP	LKSR 50-NP	Match Status
Manufacturer	LEM USA Inc.	LEM USA Inc.	Identical
Sensor Type	Hall Effect, Closed Loop	Hall Effect, Closed Loop	Identical
Current - Sensing	50A	50A	Identical
Number of Channels	1	1	Identical
Output Type	Ratiometric, Voltage	Ratiometric, Voltage	Identical
Sensitivity	12.5mV/A	12.5mV/A	Identical
Frequency	300kHz	300kHz	Identical
Linearity	±0.1%	±0.1%	Identical
Accuracy	±1.25%	±1.25%	Identical
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	Identical
Response Time	400ns	400ns	Identical
Current - Supply (Max)	51.3mA	51.3mA	Identical
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	Identical
Polarization	Bidirectional	Bidirectional	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Module	Module	Identical
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both the LESR 50-NP and LKSR 50-NP are Active product status components manufactured by LEM USA Inc. with full RoHS compliance and REACH Unaffected designation. Selection between these parts is based on availability and inventory status rather than technical performance differentiation.

The LESR 50-NP maintains 818 pieces in new original stock inventory. The LKSR 50-NP maintains 1002 pieces in new original stock inventory. Both components satisfy identical electrical, mechanical, environmental, and regulatory requirements for 50A Hall Effect current sensing applications requiring closed-loop bidirectional measurement with ratiometric voltage output.

Component selection should prioritize supply chain availability and lead time requirements, as all technical specifications and compliance certifications are equivalent between the two part numbers.

Frequently Asked Questions (FAQ)

Q: Can LKSR 50-NP be used as a direct replacement for LESR 50-NP in existing designs?

A: Yes. The LKSR 50-NP is a parametric equivalent substitute with identical electrical performance, output characteristics, supply requirements, response time, accuracy, linearity, and operating temperature range. Through-hole mounting compatibility and module package type are identical. No circuit redesign is required.

Q: Are there differences in output signal characteristics between LESR 50-NP and LKSR 50-NP?

A: No. Both parts provide identical ratiometric voltage output with 12.5mV/A sensitivity, ±1.25% accuracy, and ±0.1% linearity. Frequency response (300kHz) and response time (400ns) are identical.

Q: Do both parts operate with the same supply voltage range?

A: Yes. Both LESR 50-NP and LKSR 50-NP require 4.75V to 5.25V supply voltage with maximum supply current of 51.3mA.

Q: Are there environmental or compliance differences between these parts?

A: No. Both parts are RoHS Compliant, REACH Unaffected, and rated MSL 1 (Unlimited). Operating temperature range is -40°C to 105°C for both components.

Q: What is the difference between LESR and LKSR series designations?

A: The series designation difference reflects manufacturer product line organization. Both series are produced by LEM USA Inc. and maintain identical electrical and mechanical specifications for the 50A current sensing module configuration.

Q: Can these parts be used for AC and DC current measurement?

A: Yes. Both LESR 50-NP and LKSR 50-NP are specified for AC/DC current measurement with closed-loop bidirectional sensing capability.

Q: Is the through-hole mounting compatible with standard PCB assembly processes?

A: Yes. Both parts feature through-hole mounting type suitable for conventional PCB assembly and wave soldering processes.

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