ACS755LCB-100-PFF Current Sensor Equivalent & Substitute Parts

Part Overview

The ACS755LCB-100-PFF is a Hall Effect open loop current sensor designed for 100A DC measurement applications. This component features bidirectional current sensing capability with ratiometric voltage output and is housed in a 5-CB formed leads package. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ACS755LCB-100-PFF

Allegro MicroSystemsIn Stock: 1013ACS755LCB-100-PFF Datasheet

Current PartRFQ

ACS758LCB-100U-PFF-T

Allegro MicroSystemsIn Stock: 1392ACS758LCB-100U-PFF-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACS755LCB-100-PFF is determined by the following critical parameters:

• Current sensing range: 100A nominal rating
• Sensor technology: Hall Effect, open loop architecture
• Output type: Ratiometric voltage output
• Sensitivity: 40mV/A
• Package form factor: 5-CB formed leads, PFF module
• Mounting configuration: Through hole
• Operating temperature range: -40°C to 150°C
• Supply voltage compatibility: 5V nominal operation

The ACS758LCB-100U-PFF-T qualifies as a manufacturer-recommended substitute based on matching these core electrical and mechanical parameters. The primary distinction is the change from bidirectional to unidirectional polarization, which represents a functional enhancement rather than a limitation for applications requiring single-direction current measurement.

Parameter Comparison

Engineering Selection Recommendations

The ACS758LCB-100U-PFF-T is the manufacturer-recommended substitute for the obsolete ACS755LCB-100-PFF. Both components maintain ROHS3 compliance and identical package form factors, ensuring direct mechanical and electrical compatibility in through-hole applications.

The substitute part offers active product status with AEC-Q100 automotive qualification, providing enhanced supply voltage flexibility (3V to 5.5V versus fixed 5V), improved response time (4µs versus 13µs), and extended frequency bandwidth (DC to 120kHz versus DC to 27kHz). The unidirectional polarization of the substitute part is suitable for applications where current flows in a single direction.

Frequently Asked Questions (FAQ)

Q: Can the ACS758LCB-100U-PFF-T directly replace the ACS755LCB-100-PFF in existing designs?

A: Yes, for applications requiring unidirectional current measurement. Both parts share identical 100A current sensing capability, 40mV/A sensitivity, 5-CB formed leads package, and through-hole mounting. The substitute part operates across a wider supply voltage range (3V to 5.5V) and offers improved performance specifications.

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

A: The main difference is polarization: the ACS755LCB-100-PFF measures bidirectional current (positive and negative), while the ACS758LCB-100U-PFF-T measures unidirectional current (single direction only). For applications that only require single-direction current measurement, the unidirectional substitute is appropriate.

Q: Are the package dimensions and pin configurations identical?

A: Yes. Both parts use the 5-CB formed leads, PFF package with through-hole mounting. No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to the substitute part?

A: The ACS758LCB-100U-PFF-T carries AEC-Q100 automotive qualification and maintains ROHS3 compliance, matching the regulatory status of the original part.

Q: Does the substitute part require different supply voltage?

A: The substitute part accepts 3V to 5.5V supply, providing greater flexibility than the original part's fixed 5V requirement. Existing 5V supply designs remain fully compatible.