L34S400D15 Hall Effect Current Sensor - Equivalent & Substitute Parts

Part Overview

The L34S400D15 is a Hall Effect current sensor manufactured by Tamura, designed for AC/DC current measurement applications requiring 400A sensing capability. This component features open-loop bidirectional measurement with ratiometric voltage output and operates across a frequency range of DC to 50kHz.

The L34S400D15 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 systems utilizing this sensor technology.

Substiute Parts

L34S400D15

TamuraIn Stock: 801L34S400D15 Datasheet

Current PartRFQ

L34S400D15T

TamuraIn Stock: 844L34S400D15T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L34S400D15 is determined by the following critical parameters:

Core Functional Parameters:

• Sensor Type: Hall Effect, Open Loop technology
• Current Sensing Capability: 400A nominal range
• Number of Channels: Single channel configuration
• Output Format: Ratiometric voltage output
• Polarization: Bidirectional measurement capability

Electrical Compatibility Parameters:

• Supply Voltage Range: ±15V nominal (with acceptable tolerance variations)
• Response Time: 5µs specification
• Maximum Supply Current: 25mA threshold
• Linearity: ±0.5% accuracy specification

Environmental & Mechanical Parameters:

• Operating Temperature: Minimum -30°C capability required
• Mounting Configuration: Panel or Chassis mount compatibility
• Package Classification: Module-based construction
• RoHS Compliance: Regulatory requirement for substitution

The L34S400D15T qualifies as a direct substitute based on matching core functional parameters, identical current sensing range, equivalent response time, and maintained linearity specification. Variations in frequency range, supply voltage tolerance, operating temperature maximum, and mounting type represent acceptable engineering trade-offs within the L34SXXXD15 series design envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: L34S400D15T

The L34S400D15T is the recommended substitute for the obsolete L34S400D15. This recommendation is based on the following engineering factors:

Product Status Alignment: The L34S400D15T maintains active production status, ensuring long-term availability and supply chain continuity. The L34S400D15 is classified as obsolete, making the transition to an active equivalent part necessary for ongoing system support.

Functional Equivalence: Both parts share identical core specifications: 400A current sensing capability, Hall Effect open-loop technology, single-channel configuration, ratiometric voltage output, ±0.5% linearity, 5µs response time, and bidirectional polarization. These parameters define the functional envelope for current measurement applications.

Regulatory Compliance: Both parts maintain RoHS compliance status. The L34S400D15T achieves ROHS3 compliance, representing current regulatory standards. This ensures compatibility with modern procurement and environmental requirements.

Parameter Variations: The L34S400D15T exhibits three parameter differences from the main part:

1. Frequency Range: The substitute operates at DC ~ 25kHz versus the main part's DC ~ 50kHz. Applications requiring measurement above 25kHz require evaluation against actual system bandwidth requirements.

2. Operating Temperature: The substitute extends the operating range to -40°C ~ 105°C, providing enhanced thermal performance compared to the main part's -30°C ~ 80°C range.

3. Mounting Configuration: The substitute features Chassis Mount with single pass-through design versus Panel Mount. Physical integration requirements must be assessed for mechanical compatibility.

4. Supply Voltage Tolerance: The substitute accepts ±12V ~ 15V, providing broader voltage compatibility than the main part's fixed ±15V specification.

Selection Criteria: Select the L34S400D15T when the application operates within DC to 25kHz frequency requirements and can accommodate chassis mount configuration. Verify mounting geometry and supply voltage availability in the target system before implementation.

Frequently Asked Questions (FAQ)

Q1: Can the L34S400D15T directly replace the L34S400D15 in existing designs?

A: The L34S400D15T provides functional equivalence for current measurement applications. Direct replacement requires verification of three factors: (1) system frequency requirements do not exceed 25kHz, (2) mounting configuration can accommodate chassis mount design, and (3) physical envelope permits the single pass-through module geometry. Electrical parameters including current range, output format, response time, and linearity are identical.

Q2: What is the significance of the frequency range difference between these parts?

A: The L34S400D15 operates to 50kHz while the L34S400D15T operates to 25kHz. This difference affects measurement accuracy for AC current signals above 25kHz. Applications measuring 50Hz to 60Hz industrial power, variable frequency drive outputs below 25kHz, and DC current are unaffected. High-frequency switching applications above 25kHz require the original L34S400D15 or alternative sensors with higher frequency capability.

Q3: How do the mounting types differ between these sensors?

A: The L34S400D15 uses Panel Mount configuration, typically for front-panel or enclosure-mounted installations. The L34S400D15T uses Chassis Mount with single pass-through design, suitable for internal mounting on circuit boards or chassis structures. Physical integration requirements determine which mounting type is appropriate for the target application.

Q4: Are there supply voltage compatibility considerations?

A: The L34S400D15 requires ±15V supply voltage. The L34S400D15T accepts ±12V to ±15V supply voltage range. Systems providing exactly ±15V are compatible with both parts. Systems with ±12V supply can only use the L34S400D15T. Verify actual supply voltage availability in the target system.

Q5: What is the significance of the extended operating temperature range in the L34S400D15T?

A: The L34S400D15T operates from -40°C to 105°C compared to the L34S400D15's -30°C to 80°C range. This extended range provides performance in colder environments (below -30°C) and hotter environments (above 80°C). Applications operating within -30°C to 80°C experience identical thermal performance from both parts.

Q6: Why is the L34S400D15 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The L34S400D15T represents the active production equivalent within the L34SXXXD15 series. Existing inventory of the L34S400D15 is finite. New designs and production requirements should transition to the L34S400D15T to ensure long-term supply availability.

Q7: Are both parts RoHS compliant?

A: Yes. The L34S400D15 is RoHS Compliant. The L34S400D15T is ROHS3 Compliant, representing the current RoHS standard. Both parts meet environmental and regulatory requirements for modern electronics manufacturing and procurement.

Q8: What does "single pass-through" design mean in the L34S400D15T?

A: Single pass-through refers to the module's mechanical configuration where the current conductor passes through the sensor once. This design is typical for chassis-mounted current sensors integrated into power distribution systems. The panel-mount L34S400D15 uses a different mechanical interface suitable for front-panel installation.