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

Part Overview

The LESR 50-NP KIT is a 3-piece kit containing Hall Effect closed-loop current sensors manufactured by LEM USA Inc. This product is classified as obsolete and has been superseded by active alternatives. The kit is designed for AC/DC current measurement applications requiring bidirectional sensing capability with ratiometric voltage output. Due to its obsolete status, identifying functionally equivalent active production parts is essential for new designs and ongoing system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	LESR 50-NP KIT
Manufacturer	LEM USA Inc.
Series	LESR
Product Status	Obsolete
Sensor Type	Hall Effect, Closed Loop
Current Sensing Range	50A
Number of Channels	1
Output Type	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
Operating Temperature Range	-40°C ~ 105°C (TA)
Polarization	Bidirectional
Mounting Type	Through Hole
Package Type	Module
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

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

Electrical Equivalence Criteria:

Sensor Type: Hall Effect, Closed Loop
Current Sensing Capacity: 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
Operating Temperature Range: -40°C ~ 105°C
Polarization: Bidirectional

Mechanical Equivalence Criteria:

Mounting Type: Through Hole
Package Type: Module
Number of Channels: 1

Compliance Equivalence Criteria:

RoHS Compliance: Required
REACH Status: REACH Unaffected
Moisture Sensitivity Level: 1 (Unlimited)

The LESR 50-NP (individual unit, active production status) meets all electrical, mechanical, and compliance requirements for direct substitution of the LESR 50-NP KIT.

Parameter Comparison

Parameter	LESR 50-NP KIT (Obsolete)	LESR 50-NP (Active)	Match Status
Manufacturer	LEM USA Inc.	LEM USA Inc.	Identical
Series	LESR	LESR	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 Response	300kHz	300kHz	Identical
Linearity	±0.1%	±0.1%	Identical
Accuracy	±1.25%	±1.25%	Identical
Supply Voltage Range	4.75V ~ 5.25V	4.75V ~ 5.25V	Identical
Response Time	400ns	400ns	Identical
Maximum Supply Current	51.3mA	51.3mA	Identical
Operating Temperature Range	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	Identical
Polarization	Bidirectional	Bidirectional	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package Type	Module	Module	Identical
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Obsolete	Active	Upgrade Path

Engineering Selection Recommendations

The LESR 50-NP represents the direct active production equivalent to the obsolete LESR 50-NP KIT. All electrical performance parameters, mechanical specifications, and regulatory compliance certifications are identical between the two parts.

Primary Recommendation: LESR 50-NP (Active Production)

The LESR 50-NP is the manufacturer-designated successor to the LESR 50-NP KIT. It maintains full electrical and mechanical compatibility while offering the advantage of active production status, ensuring long-term availability and supply chain continuity. The part is RoHS compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Packaging Consideration: The LESR 50-NP KIT is supplied as a 3-piece kit, while the LESR 50-NP is supplied as individual units in tray packaging. System designers requiring multiple units should calculate the total quantity of LESR 50-NP individual parts needed to match the original kit quantity.

Frequently Asked Questions (FAQ)

Q: Can the LESR 50-NP directly replace the LESR 50-NP KIT in existing designs?

A: Yes. The LESR 50-NP is electrically and mechanically identical to the LESR 50-NP KIT. All performance parameters, output characteristics, and operating specifications are equivalent. The primary difference is packaging format: the kit contains 3 pieces, while the LESR 50-NP is supplied as individual units.

Q: What is the difference between the LESR 50-NP KIT and LESR 50-NP?

A: The LESR 50-NP KIT is an obsolete product supplied as a 3-piece kit. The LESR 50-NP is the active production equivalent supplied as individual units in tray packaging. All electrical and mechanical specifications are identical.

Q: Are there any compliance differences between the two parts?

A: No. Both the LESR 50-NP KIT and LESR 50-NP are RoHS compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited).

Q: How many LESR 50-NP units should I order to replace one LESR 50-NP KIT?

A: The LESR 50-NP KIT contains 3 pieces. Order 3 units of LESR 50-NP to obtain the equivalent quantity.

Q: Is the LESR 50-NP suitable for AC/DC current measurement applications?

A: Yes. The LESR 50-NP is rated for AC/DC current measurement with bidirectional sensing capability, identical to the LESR 50-NP KIT.

Q: What is the maximum current sensing capacity of the LESR 50-NP?

A: The LESR 50-NP has a current sensing range of 50A with a sensitivity of 12.5mV/A.

Q: What supply voltage is required for the LESR 50-NP?

A: The LESR 50-NP requires a supply voltage in the range of 4.75V to 5.25V.

Q: What is the operating temperature range for the LESR 50-NP?

A: The LESR 50-NP operates across a temperature range of -40°C to 105°C (TA).

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