LTS 25-NP/SP6 Current Transducer Equivalent & Substitute Parts

Part Overview

The LTS 25-NP/SP6 is a 25A current transducer manufactured by LEM USA Inc., designed for AC/DC current measurement applications. This Hall Effect, closed-loop bidirectional sensor operates across a frequency range of DC to 200kHz with ratiometric voltage output and ±0.2% accuracy. The product is classified as obsolete, necessitating identification of active equivalent components to maintain system functionality and ensure continued supply chain availability for new designs and legacy system replacements.

Substiute Parts

LTS 25-NP/SP6

LEM USA Inc.In Stock: 843LTS 25-NP/SP6 Datasheet

Current PartRFQ

T60404N4646X651

VACUUMSCHMELZEIn Stock: 3309T60404N4646X651 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTS 25-NP/SP6 is determined by the following critical parameters that must align between the main part and substitute components:

Primary Substitution Criteria:

• Current sensing capacity: 25A
• Sensor technology: Closed-loop topology
• Output configuration: Ratiometric voltage output
• Number of channels: Single channel (1)
• Frequency response: DC to 200kHz minimum
• Supply voltage range: 4.75V to 5.25V
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through-hole package
• Measurement capability: AC/DC current measurement

The T60404N4646X651 from VACUUMSCHMELZE meets these core functional requirements. While differences exist in polarization (unidirectional versus bidirectional), accuracy specification (±0.7% versus ±0.2%), and response time (300ns versus 400ns), the substitute part maintains electrical compatibility within the specified parameter envelope for 25A current sensing applications.

Parameter Comparison

Engineering Selection Recommendations

The T60404N4646X651 serves as a functional equivalent for the obsolete LTS 25-NP/SP6 based on the following engineering criteria:

Product Status Alignment: The substitute part is classified as active with current production availability, addressing the obsolescence status of the main part. This ensures long-term supply chain continuity and eliminates procurement risk associated with end-of-life components.

Compliance and Certification: Both parts maintain RoHS compliance (RoHS Compliant and ROHS3 Compliant respectively), satisfying environmental and regulatory requirements. The substitute part carries REACH Unaffected status and EAR99 ECCN classification, providing additional regulatory clarity for international applications.

Electrical Parameter Equivalence: The substitute maintains identical specifications for current sensing capacity (25A), output configuration (ratiometric voltage), frequency response (DC to 200kHz), supply voltage (4.75V to 5.25V), and operating temperature range (-40°C to 85°C). These parameters define the core functional capability for 25A AC/DC current measurement.

Performance Trade-offs: The T60404N4646X651 exhibits improved response time (300ns versus 400ns) and wider accuracy tolerance (±0.7% versus ±0.2%). Applications requiring the tighter ±0.2% accuracy specification of the original part must evaluate whether the ±0.7% accuracy of the substitute meets system-level requirements.

Polarization Consideration: The main part operates bidirectionally while the substitute operates unidirectionally. Applications requiring bidirectional current sensing must confirm that unidirectional operation is acceptable for the intended measurement circuit topology.

Frequently Asked Questions (FAQ)

Q: Can the T60404N4646X651 directly replace the LTS 25-NP/SP6 in existing designs?

A: The T60404N4646X651 provides electrical compatibility for 25A current measurement applications with identical supply voltage, frequency response, and operating temperature specifications. However, the unidirectional polarization of the substitute differs from the bidirectional capability of the original part. Designs requiring bidirectional current sensing must evaluate circuit modifications or alternative substitutes. The wider accuracy tolerance (±0.7% versus ±0.2%) must be assessed against system accuracy requirements.

Q: What are the key differences between these two current transducers?

A: The primary differences are: (1) Polarization—the original part is bidirectional while the substitute is unidirectional; (2) Accuracy—the original specifies ±0.2% while the substitute specifies ±0.7%; (3) Response time—the substitute is faster at 300ns compared to 400ns; (4) Current supply—the substitute draws 15mA maximum versus 28mA typical for the original; (5) Product status—the original is obsolete while the substitute is active production.

Q: Are the mounting and package configurations compatible?

A: Both parts use through-hole mounting. The original LTS 25-NP/SP6 uses a single pass-through module package, while the T60404N4646X651 uses a 9-DIP module package. Physical board layout and connector compatibility must be verified during integration, as the package form factors differ despite identical mounting technology.

Q: What compliance certifications apply to the substitute part?

A: The T60404N4646X651 is ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 9030.33.3800. These certifications satisfy environmental regulations and provide clarity for export and international distribution requirements.

Q: Is the substitute part suitable for applications requiring high measurement accuracy?

A: The substitute part specifies ±0.7% accuracy compared to the original ±0.2% specification. Applications with system-level accuracy requirements tighter than ±0.7% must evaluate whether this tolerance is acceptable or whether alternative components with tighter accuracy specifications are required.

Q: Can the substitute handle bidirectional current measurement?

A: No. The T60404N4646X651 is specified as unidirectional, meaning it measures current in one direction only. Applications requiring bidirectional current sensing (measurement of both positive and negative current flow) must either modify the circuit topology or identify alternative substitute parts with bidirectional capability.

Q: What is the inventory status of these parts?

A: The original LTS 25-NP/SP6 has 772 pieces in stock as new original inventory. The substitute T60404N4646X651 has 3255 pieces in stock as new original inventory, providing significantly greater availability for immediate procurement.