LTSR 6-NP Current Sensor Equivalent & Substitute Parts

Part Overview

The LTSR 6-NP is a Hall Effect current sensor manufactured by LEM USA Inc., designed for AC/DC current measurement applications with a 6A sensing range. This component features closed-loop bidirectional measurement capability in a single pass-through module configuration with through-hole mounting.

The LTSR 6-NP is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this sensor.

Substiute Parts

LTSR 6-NP

LEM USA Inc.In Stock: 9650LTSR 6-NP Datasheet

Current PartRFQ

CASR 6-NP

LEM USA Inc.In Stock: 1934CASR 6-NP Datasheet

DirectRFQ

T60404N4647X663

VACUUMSCHMELZEIn Stock: 2957T60404N4647X663 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTSR 6-NP are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Current sensing range: 6A
• Measurement capability: AC/DC
• Number of channels: 1
• Output configuration: Ratiometric, Voltage
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Through Hole
• Supply voltage compatibility: 5V nominal operation

Secondary Compatibility Factors:

• Sensor technology type (Hall Effect or Flux Gate closed-loop technologies)
• Frequency response characteristics
• Accuracy and linearity specifications
• Polarization capability (bidirectional or unidirectional)
• Package configuration (module-based)

The identified substitutes maintain the core functional parameters required for 6A AC/DC current sensing applications while accommodating variations in sensor technology, response time, and package form factor.

Parameter Comparison

Engineering Selection Recommendations

CASR 6-NP (LEM USA Inc.)

The CASR 6-NP is an active product from the same manufacturer as the obsolete LTSR 6-NP. Both devices share identical current sensing range (6A), channel configuration (1 channel), output type (ratiometric voltage), operating temperature range (-40°C ~ 85°C), and bidirectional polarization capability. The CASR 6-NP utilizes Flux Gate technology instead of Hall Effect technology, resulting in improved frequency response (300kHz versus 200kHz) and faster response time (0.3µs versus 0.4µs). The CASR 6-NP features expanded supply voltage tolerance (4.75V ~ 5.25V) compared to the fixed 5V specification of the LTSR 6-NP. Linearity and accuracy specifications differ, with the LTSR 6-NP offering tighter linearity (±0.1% versus ±1%) and accuracy (±0.2% versus ±0.8%). Both devices are RoHS compliant and carry identical ECCN and HTSUS classifications. The CASR 6-NP is packaged in trays and is currently in active production with 1869 units in stock.

T60404N4647X663 (VACUUMSCHMELZE)

The T60404N4647X663 is an active product from VACUUMSCHMELZE that matches the LTSR 6-NP in current sensing range (6A), measurement type (AC/DC), channel count (1), output configuration (ratiometric voltage), frequency response (DC ~ 200kHz), and operating temperature range (-40°C ~ 85°C). This device features superior response time (300ns versus 0.4µs) and tighter linearity specification (±0.1% matching the LTSR 6-NP). The T60404N4647X663 differs in polarization capability (unidirectional versus bidirectional) and package configuration (10-DIP module versus single pass-through module). Supply voltage tolerance is expanded (4.75V ~ 5.25V). The device is ROHS3 compliant and carries identical ECCN and HTSUS classifications. Current inventory is 2938 units, packaged in boxes.

Selection Basis:

Both substitute parts maintain compliance with RoHS and REACH requirements. The CASR 6-NP is recommended for applications requiring bidirectional measurement capability and manufacturer continuity with LEM USA Inc. The T60404N4647X663 is recommended for applications requiring the fastest response time and unidirectional measurement capability, with consideration for package form factor differences.

Frequently Asked Questions (FAQ)

Q: Can the CASR 6-NP directly replace the LTSR 6-NP in existing designs?

A: The CASR 6-NP shares the same 6A current sensing range, single-channel configuration, ratiometric voltage output, operating temperature range, and bidirectional polarization as the LTSR 6-NP. Both are through-hole mounted modules from LEM USA Inc. However, the CASR 6-NP uses Flux Gate technology instead of Hall Effect technology, resulting in different accuracy (±0.8% versus ±0.2%) and linearity (±1% versus ±0.1%) specifications. Physical package dimensions and pinout must be verified for mechanical compatibility before substitution.

Q: What are the key differences between the CASR 6-NP and T60404N4647X663?

A: The CASR 6-NP is a bidirectional sensor from LEM USA Inc. with 0.3µs response time and ±1% linearity. The T60404N4647X663 is a unidirectional sensor from VACUUMSCHMELZE with 300ns response time and ±0.1% linearity. Both measure 6A AC/DC current with single-channel ratiometric voltage output. The CASR 6-NP is packaged as a single pass-through module, while the T60404N4647X663 uses a 10-DIP module configuration. Selection depends on whether bidirectional measurement and response time requirements are critical to the application.

Q: Is the T60404N4647X663 suitable for applications requiring bidirectional current measurement?

A: No. The T60404N4647X663 is specified as unidirectional, meaning it measures current in one direction only. Applications requiring bidirectional current measurement capability must use either the LTSR 6-NP (obsolete) or the CASR 6-NP (active substitute).

Q: What supply voltage range should be used for each substitute part?

A: The LTSR 6-NP requires a fixed 5V supply. The CASR 6-NP and T60404N4647X663 both accept supply voltages in the range of 4.75V ~ 5.25V, providing greater tolerance for power supply variations. Designs using the CASR 6-NP or T60404N4647X663 can accommodate this expanded voltage range.

Q: Are all three parts RoHS compliant?

A: Yes. The LTSR 6-NP and CASR 6-NP are RoHS Compliant. The T60404N4647X663 is ROHS3 Compliant. All three parts are REACH Unaffected and carry identical ECCN (EAR99) and HTSUS (9030.33.3800) classifications.

Q: What is the significance of the response time differences between these sensors?

A: Response time indicates how quickly the sensor output responds to changes in input current. The LTSR 6-NP has a response time of 0.4µs, the CASR 6-NP has 0.3µs, and the T60404N4647X663 has 300ns. Applications requiring rapid current measurement updates benefit from faster response times. The T60404N4647X663 offers the fastest response, followed by the CASR 6-NP, then the LTSR 6-NP.

Q: How do accuracy specifications affect sensor selection?

A: Accuracy represents the maximum deviation of the sensor output from the true current value. The LTSR 6-NP offers ±0.2% accuracy, the T60404N4647X663 offers ±0.7% accuracy, and the CASR 6-NP offers ±0.8% accuracy. Applications requiring high measurement precision should prioritize the LTSR 6-NP or T60404N4647X663. Since the LTSR 6-NP is obsolete, the T60404N4647X663 is the active substitute with comparable accuracy.

Q: What packaging considerations apply to these sensors?

A: The LTSR 6-NP and CASR 6-NP are packaged as single pass-through modules. The T60404N4647X663 uses a 10-DIP module package. Physical dimensions, pin spacing, and mounting hole locations differ between these package types. PCB layout and mechanical mounting must be verified for compatibility before substitution.