L03S100D15WM Current Sensor - Equivalent & Substitute Parts

Part Overview

The L03S100D15WM is a Hall Effect open loop current sensor manufactured by Tamura, designed for bidirectional AC/DC current measurement up to 100A in a single-channel configuration. This component operates across a frequency range of DC to 100kHz with a response time of 10µs and is housed in a chassis-mount module package. The product is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support and new design implementations.

Substiute Parts

L03S100D15WM

TamuraIn Stock: 915L03S100D15WM Datasheet

Current PartRFQ

L37S100D15M

TamuraIn Stock: 1184L37S100D15M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L03S100D15WM is determined by the following critical parameters that must remain compatible:

Core Functional Parameters:

• Sensor Type: Hall Effect, Open Loop technology
• Current Sensing Capacity: 100A nominal rating
• Number of Channels: Single channel configuration
• Output Format: Ratiometric voltage output
• Supply Voltage: 15V operation
• Mounting Configuration: Chassis mount module package

Performance Constraints:

• Linearity tolerance of ±1%
• Maximum supply current of 20mA
• RoHS compliance requirement

The L37S100D15M qualifies as a manufacturer-recommended substitute based on these core parameters. However, the substitute introduces a functional limitation: it operates in unidirectional mode rather than bidirectional, and supports DC measurement only rather than AC/DC. The substitute also provides improved response time (3µs versus 10µs) and extended operating temperature range (-40°C to 85°C versus -10°C to 80°C).

Parameter Comparison

Engineering Selection Recommendations

The L37S100D15M is the manufacturer-recommended substitute for the obsolete L03S100D15WM. Both components share identical core specifications for 100A single-channel Hall Effect current sensing with 15V supply operation and ±1% linearity.

Substitution Applicability:

The L37S100D15M is suitable for applications requiring DC current measurement only. Systems currently utilizing the L03S100D15WM for bidirectional AC/DC measurement require functional evaluation, as the substitute operates in unidirectional DC mode exclusively.

Advantages of Substitution:

The L37S100D15M offers improved response time (3µs versus 10µs) and extended operating temperature range (-40°C to 85°C versus -10°C to 80°C). The substitute maintains active product status, ensuring ongoing availability and manufacturer support.

Compliance Considerations:

Both components maintain RoHS compliance and identical electrical interface specifications (15V supply, 20mA maximum supply current, ratiometric voltage output). Mechanical compatibility is preserved through identical chassis-mount module packaging.

Frequently Asked Questions (FAQ)

Q: Can the L37S100D15M replace the L03S100D15WM in all applications?

A: The L37S100D15M is functionally compatible for DC current measurement applications. Applications requiring AC current measurement or bidirectional current sensing must evaluate the unidirectional DC-only limitation of the substitute.

Q: What is the primary difference between these two sensors?

A: The main difference is measurement capability. The L03S100D15WM measures both AC and DC current in bidirectional mode, while the L37S100D15M measures DC current only in unidirectional mode. Both maintain identical 100A sensing capacity and 15V supply voltage.

Q: Are the physical packages identical?

A: Yes, both components use chassis-mount module packaging with identical mechanical interfaces, allowing direct physical replacement without mechanical redesign.

Q: Does the faster response time of the L37S100D15M affect system compatibility?

A: The L37S100D15M provides 3µs response time compared to 10µs for the L03S100D15WM. This improvement is backward-compatible with systems designed for the original 10µs specification.

Q: What is the temperature operating range difference?

A: The L03S100D15WM operates from -10°C to 80°C, while the L37S100D15M operates from -40°C to 85°C. The substitute provides extended low-temperature capability and slightly higher maximum temperature rating.

Q: Are both components RoHS compliant?

A: Yes, both the L03S100D15WM and L37S100D15M are RoHS compliant and suitable for applications with RoHS requirements.

Q: What supply current do these sensors require?

A: Both components have a maximum supply current of 20mA at 15V supply voltage, maintaining identical power consumption specifications.