CAS 50-NP Current Sensor Equivalent & Substitute Parts

Part Overview

The CAS 50-NP is a flux gate closed-loop current sensor manufactured by LEM USA Inc., designed for AC/DC current measurement applications requiring 50A sensing capability. This module provides ratiometric voltage output with bidirectional polarization and is classified as Active product status. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications are maintained across the specified parameter range.

Key Parameters

Parameter	Value
Manufacturer Part Number	CAS 50-NP
Manufacturer	LEM USA Inc.
Current - Sensing	50A
Sensor Type	Flux Gate, Closed Loop
Number of Channels	1
Output Type	Ratiometric, Voltage
Sensitivity	12.5mV/A
Frequency	300kHz
Linearity	±1%
Accuracy	±0.8%
Voltage - Supply	4.75V ~ 5.25V
Response Time	0.3µs
Current - Supply (Max)	20mA
Operating Temperature	-40°C ~ 85°C
Polarization	Bidirectional
Mounting Type	Through Hole
Package / Case	Module
RoHS Status	RoHS Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

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

Electrical Performance Parameters:

Current sensing range: 50A
Sensor technology: Flux Gate, Closed Loop
Output configuration: Ratiometric, Voltage
Sensitivity: 12.5mV/A
Frequency response: 300kHz
Linearity tolerance: ±1%
Accuracy tolerance: ±0.8%
Supply voltage range: 4.75V ~ 5.25V
Response time: 0.3µs
Maximum supply current: 20mA

Mechanical & Environmental Parameters:

Number of channels: 1
Polarization: Bidirectional
Mounting type: Through Hole
Package type: Module
Operating temperature range: -40°C ~ 85°C

Compliance Parameters:

RoHS Compliant status
REACH Unaffected status

The CASR 50-NP meets all specified electrical, mechanical, and compliance requirements and is classified as a parametric equivalent.

Parameter Comparison

Parameter	CAS 50-NP	CASR 50-NP	Match Status
Manufacturer	LEM USA Inc.	LEM USA Inc.	Identical
Current - Sensing	50A	50A	Identical
Sensor Type	Flux Gate, Closed Loop	Flux Gate, Closed Loop	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	±1%	±1%	Identical
Accuracy	±0.8%	±0.8%	Identical
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	Identical
Response Time	0.3µs	0.3µs	Identical
Current - Supply (Max)	20mA	20mA	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Polarization	Bidirectional	Bidirectional	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Module	Module	Identical
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both the CAS 50-NP and CASR 50-NP are Active status products manufactured by LEM USA Inc. with identical electrical specifications, mechanical configurations, and compliance certifications. Selection between these parts is based on availability and supply chain requirements rather than technical performance differentiation.

The CAS 50-NP carries 899 pieces in current inventory. The CASR 50-NP carries 5340 pieces in current inventory, providing greater availability for high-volume applications or extended lead-time mitigation.

Both parts maintain RoHS Compliance and REACH Unaffected status, supporting regulatory requirements for industrial and commercial applications. Through-hole mounting configuration and module package type ensure mechanical compatibility in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can CASR 50-NP replace CAS 50-NP in existing designs?

A: Yes. The CASR 50-NP is a parametric equivalent with identical electrical performance, sensitivity, frequency response, accuracy, linearity, supply voltage requirements, response time, and operating temperature range. Mechanical compatibility is maintained through identical through-hole mounting type and module package configuration.

Q: Are there differences in output signal characteristics?

A: No. Both parts provide ratiometric voltage output with 12.5mV/A sensitivity and 300kHz frequency response. Accuracy (±0.8%) and linearity (±1%) specifications are identical.

Q: What is the difference between CAS and CASR series designations?

A: The series designation change from CAS to CASR does not reflect changes in electrical or mechanical parameters. All specified parameters remain equivalent. Series designation differences are manufacturing or product line organizational distinctions.

Q: Are both parts suitable for bidirectional current measurement?

A: Yes. Both CAS 50-NP and CASR 50-NP feature bidirectional polarization, enabling measurement of AC and DC current in both directions within the 50A sensing range.

Q: What supply voltage tolerance must be maintained?

A: Both parts require supply voltage within the 4.75V to 5.25V range. This 5V nominal supply with ±5% tolerance must be maintained for specified accuracy and linearity performance.

Q: Are there packaging or tray configuration differences?

A: Both parts are supplied in tray packaging. No differences in packaging configuration or handling requirements exist between the two part numbers.

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