LTS 25-NP Current Sensor Equivalent & Substitute Parts

Part Overview

The LTS 25-NP is a 25A Hall Effect closed-loop bidirectional current sensor manufactured by LEM USA Inc. This through-hole module provides ratiometric voltage output with 25mV/A sensitivity and operates across AC/DC applications with a frequency range of DC to 200kHz. The product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and production continuity.

Substiute Parts

LTS 25-NP

LEM USA Inc.In Stock: 936LTS 25-NP Datasheet

Current PartRFQ

CAS 25-NP

LEM USA Inc.In Stock: 30269CAS 25-NP Datasheet

DirectRFQ

T60404N4646X651

VACUUMSCHMELZEIn Stock: 3309T60404N4646X651 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTS 25-NP is determined by the following critical parameters:

Primary Compatibility Criteria:

• Current sensing capacity of 25A
• Single channel configuration
• Closed-loop topology
• Ratiometric voltage output
• Through-hole mounting
• Operating temperature range of -40°C to 85°C
• AC/DC measurement capability
• RoHS compliance

Secondary Compatibility Considerations:

• Sensitivity alignment (25mV/A preferred)
• Frequency response (minimum DC to 200kHz)
• Supply voltage compatibility (5V nominal or 4.75V to 5.25V range)
• Linearity and accuracy specifications
• Response time performance

The identified substitutes meet the primary criteria with variations in sensor technology (Flux Gate vs. Hall Effect), polarization capability (bidirectional vs. unidirectional), and package configuration (Module vs. 9-DIP).

Parameter Comparison

Engineering Selection Recommendations

CAS 25-NP (LEM USA Inc.)

The CAS 25-NP represents the primary substitute option. Both components are manufactured by LEM USA Inc., ensuring design continuity and supply chain alignment. The CAS 25-NP maintains identical current sensing capacity (25A), sensitivity (25mV/A), and bidirectional polarization. The substitute employs Flux Gate technology rather than Hall Effect, resulting in enhanced frequency response (300kHz vs. 200kHz) and faster response time (0.3µs vs. 0.4µs). Linearity tolerance widens from ±0.1% to ±1%, and accuracy tolerance increases from ±0.2% to ±0.8%. Supply voltage specification expands to 4.75V to 5.25V range, providing improved tolerance margins. The CAS 25-NP is active in production with substantial inventory availability (30,200 units). Packaging transitions from bulk to tray configuration. This substitute is suitable for applications where the relaxed linearity and accuracy specifications are acceptable and where the enhanced frequency response provides operational benefit.

T60404N4646X651 (VACUUMSCHMELZE)

The T60404N4646X651 provides an alternative from VACUUMSCHMELZE with identical 25A current sensing and closed-loop topology. This substitute maintains the original frequency range (DC to 200kHz) and linearity specification (±0.1%), with accuracy of ±0.7%. Response time is significantly faster at 300ns. The critical distinction is unidirectional polarization, restricting measurement to single current direction compared to the bidirectional LTS 25-NP. Package configuration is 9-DIP module rather than single pass-through. This substitute is applicable only to applications requiring unidirectional current measurement. The component is active in production with 3,255 units in stock and carries ROHS3 compliance certification.

Both substitutes maintain RoHS compliance and REACH unaffected status, supporting regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can the CAS 25-NP directly replace the LTS 25-NP in existing designs?

A: The CAS 25-NP is mechanically and electrically compatible for through-hole mounting applications. Both components provide 25A bidirectional current sensing with 25mV/A sensitivity and identical operating temperature range. The primary differences are sensor technology (Flux Gate vs. Hall Effect) and relaxed linearity/accuracy tolerances. Circuit designs tolerating ±1% linearity and ±0.8% accuracy can implement direct substitution. Designs requiring ±0.1% linearity and ±0.2% accuracy must evaluate whether the CAS 25-NP performance degradation is acceptable.

Q: What is the key limitation of the T60404N4646X651 substitute?

A: The T60404N4646X651 operates with unidirectional polarization, measuring current in a single direction only. The LTS 25-NP and CAS 25-NP are bidirectional, measuring both positive and negative current flow. This substitute is applicable only to applications with inherently unidirectional current paths. Bidirectional measurement applications cannot use this component.

Q: How do the package configurations differ among these three parts?

A: The LTS 25-NP uses a single pass-through module package. The CAS 25-NP uses a standard module package. The T60404N4646X651 uses a 9-DIP module package with three primary pins. PCB layout and footprint compatibility must be verified before substitution. The 9-DIP configuration may require circuit board redesign.

Q: Are there supply voltage compatibility concerns?

A: The LTS 25-NP specifies 5V supply voltage. Both substitutes accept 4.75V to 5.25V range, providing wider tolerance. Standard 5V supplies are compatible with all three components. Designs operating at voltage extremes (below 4.75V or above 5.25V) cannot use the substitutes.

Q: Which substitute offers the fastest response time?

A: The T60404N4646X651 provides 300ns response time, compared to 0.4µs for the LTS 25-NP and 0.3µs for the CAS 25-NP. Applications requiring sub-microsecond response performance should prioritize the T60404N4646X651, provided unidirectional measurement is acceptable.

Q: Do all three components meet current RoHS requirements?

A: Yes. The LTS 25-NP and CAS 25-NP carry RoHS Compliant certification. The T60404N4646X651 carries ROHS3 Compliant certification, representing the current RoHS 3 standard. All three components are suitable for RoHS-regulated applications.