L18P040S12 Hall Effect Current Sensor - Equivalent & Substitute Parts

Part Overview

The L18P040S12 is an active Hall Effect current sensor manufactured by Tamura, designed for AC/DC current measurement applications. This open-loop, bidirectional module provides ratiometric voltage output with a 40A sensing range and operates across a frequency spectrum from DC to 100kHz. The part is currently in active production status with 656 units available in inventory.

Identifying equivalent and substitute parts becomes necessary when addressing supply chain constraints, application-specific voltage requirements, or when current measurement ranges differ from the primary design specification. The L18P040S12 operates on a 12V supply, which may not align with all system architectures.

Substiute Parts

L18P040S12

TamuraIn Stock: 702L18P040S12 Datasheet

Current PartRFQ

L18P020S05

TamuraIn Stock: 1110L18P020S05 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the L18P040S12 is determined by the following critical parameters that must remain compatible:

Mandatory Compatibility Parameters:

• Sensor Type: Hall Effect, Open Loop
• Output Type: Ratiometric, Voltage
• Number of Channels: 1
• Polarization: Bidirectional
• Mounting Type: Through Hole
• Package / Case: Module
• Frequency Range: DC ~ 100kHz
• Response Time: 5µs
• Operating Temperature: -30°C ~ 80°C
• Linearity: ±1%

Variable Parameters (Substitution Basis):

• Current - Sensing: 40A (primary specification)
• Voltage - Supply: 12V (primary specification)

The L18P020S05 qualifies as a parametric equivalent within the L18PXXXS series because it maintains all mandatory compatibility parameters. However, this substitute operates at a reduced current sensing range (20A versus 40A) and requires a 5V supply instead of 12V. Selection between these parts depends on the specific current measurement requirements and available supply voltage in the target application.

Parameter Comparison

Engineering Selection Recommendations

Both the L18P040S12 and L18P020S05 maintain active production status and comply with RoHS environmental standards, ensuring long-term availability and regulatory compliance for industrial applications.

L18P040S12 Selection Criteria:

• Applications requiring 40A current measurement range
• Systems with 12V supply voltage availability
• RoHS Compliant certification requirement

L18P020S05 Selection Criteria:

• Applications requiring 20A current measurement range
• Systems with 5V supply voltage architecture
• ROHS3 Compliant certification requirement
• Lower current sensing applications where 40A range exceeds measurement needs

Both parts share identical response time (5µs), frequency response (DC ~ 100kHz), linearity (±1%), and operating temperature range (-30°C ~ 80°C), ensuring functional equivalence within their respective current and voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can the L18P020S05 directly replace the L18P040S12 in an existing design?

A: Direct replacement is not recommended without design review. The L18P020S05 operates on 5V supply versus the L18P040S12's 12V requirement, and the current sensing range is reduced from 40A to 20A. Both factors require circuit modification and validation.

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

A: The primary differences are supply voltage (12V versus 5V) and current sensing range (40A versus 20A). All other electrical and mechanical parameters, including response time, frequency range, linearity, and mounting type, remain identical.

Q: Are both parts suitable for AC/DC current measurement?

A: Yes. Both the L18P040S12 and L18P020S05 are specified for AC/DC current measurement with bidirectional polarization and open-loop Hall Effect operation.

Q: What does "ratiometric voltage output" mean in this context?

A: Ratiometric output means the sensor's output voltage is proportional to the supply voltage and the measured current. Both parts provide this output characteristic.

Q: Can these sensors be used in high-frequency applications?

A: Both sensors operate across the DC to 100kHz frequency range with 5µs response time, making them suitable for applications within this bandwidth specification.

Q: Are there packaging differences between these parts?

A: Both parts use Through Hole mounting and Module package type. The L18P040S12 is packaged in bulk, while the L18P020S05 is also packaged in bulk, with no significant packaging differentiation affecting mechanical integration.

Q: What is the temperature operating range for both sensors?

A: Both sensors operate across -30°C to 80°C, providing equivalent thermal performance for industrial and commercial applications.