L03S050D15 Hall Effect Current Sensor - Equivalent & Substitute Parts

Part Overview

The L03S050D15 is a Hall Effect current sensor manufactured by Tamura, designed for AC/DC current measurement applications with a 50A sensing range. This component operates as an open-loop, bidirectional module with ratiometric voltage output, suitable for industrial measurement and control systems requiring galvanic isolation.

The L03S050D15 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this sensor.

Substiute Parts

L03S050D15

TamuraIn Stock: 907L03S050D15 Datasheet

Current PartRFQ

L37S050D15M

TamuraIn Stock: 1150L37S050D15M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L03S050D15 is constrained by the following critical parameters that define functional compatibility:

Sensor Technology & Output: Both the main part and substitute must employ Hall Effect open-loop technology with ratiometric voltage output to maintain signal conditioning compatibility with existing circuit designs.

Channel Configuration: Single-channel architecture is required to match the original design topology.

Measurement Capability: The substitute must support the measurement range and polarization characteristics of the application. The L03S050D15 operates bidirectionally (AC/DC measurement), which defines the minimum functional requirement.

Electrical Specifications: Supply voltage, response time, linearity, and accuracy parameters establish the performance envelope. Substitutes must operate within compatible voltage supplies and maintain measurement precision.

Environmental & Mechanical Compatibility: Operating temperature range, mounting type, and package configuration must align with the physical and thermal constraints of the target application.

Regulatory Compliance: RoHS compliance status ensures substitutes meet environmental and safety standards equivalent to the original component.

The L37S050D15M is identified as a manufacturer-recommended substitute based on these criteria, though with specific parameter variations that require engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The L03S050D15 is obsolete, making the L37S050D15M the manufacturer-recommended active alternative. Active production status ensures long-term availability and supply chain stability.

Compliance & Certification: Both components maintain RoHS compliance, satisfying environmental and regulatory requirements for industrial applications.

Functional Compatibility Assessment: The L37S050D15M substitution is viable for applications meeting all of the following conditions:

1. The application measures DC current only, or can be redesigned to operate in DC mode (the substitute is unidirectional, unlike the bidirectional L03S050D15)
2. The circuit can be modified to operate with single-polarity 15V supply instead of ±15V
3. The mechanical design can accommodate chassis mount configuration instead of through-hole mounting
4. The application current range does not exceed 150A (the substitute's rated range)

Parameter Deviations: The substitute introduces three material differences: supply voltage polarity, polarization mode, and mounting type. These differences require explicit engineering evaluation against the original application requirements before implementation.

Inventory & Availability: The L37S050D15M is available in active production (1087 units in stock), whereas the L03S050D15 is obsolete (843 units remaining in stock). For new designs or long-term production, the substitute is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the L37S050D15M directly replace the L03S050D15 without circuit modification?

A: No. The L37S050D15M requires circuit modifications in three areas: (1) supply voltage must be changed from ±15V to single-polarity 15V, (2) the mounting interface differs (chassis mount vs. through-hole), and (3) the measurement mode is DC-only rather than AC/DC bidirectional. Direct pin-for-pin substitution is not possible.

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

A: The L03S050D15 is bidirectional (measures both AC and DC current), while the L37S050D15M is unidirectional (DC measurement only). This is the most significant functional distinction and must be evaluated against application requirements.

Q: Does the higher current range of the L37S050D15M (150A vs. 50A) affect measurement accuracy?

A: The linearity specification (±1%) is identical for both components. However, the substitute's higher range may result in reduced sensitivity at lower current levels. Detailed sensitivity specifications are not provided in the available parameters; application-specific testing may be required to confirm measurement performance at the intended operating current.

Q: Are there any advantages to using the L37S050D15M?

A: Yes. The substitute offers faster response time (3µs vs. 5µs), extended operating temperature range (-40°C to 85°C vs. -20°C to 80°C), and active production status ensuring long-term availability. These advantages apply only if the functional differences (DC-only measurement, single-polarity supply, chassis mount) are compatible with the application.

Q: What mounting modifications are required for the L37S050D15M?

A: The L03S050D15 uses through-hole mounting, while the L37S050D15M uses chassis mount configuration. The PCB layout and mechanical enclosure design must be modified to accommodate the different mounting interface.

Q: Is the L37S050D15M suitable for AC current measurement applications?

A: No. The L37S050D15M is unidirectional and specified for DC measurement only. Applications requiring AC or bidirectional AC/DC measurement capability cannot use this substitute without functional degradation.