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ACS756SCA-100B-PFF-T Current Sensor Equivalent & Substitute Parts
Part Overview
The ACS756SCA-100B-PFF-T is a Hall Effect current sensor manufactured by Allegro MicroSystems, designed for AC/DC current measurement up to 100A in open-loop bidirectional configuration. This component features ratiometric voltage output with 20mV/A sensitivity and operates across a supply voltage range of 3V to 5.5V.
The ACS756SCA-100B-PFF-T is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing system maintenance, design updates, or production continuity when original inventory becomes unavailable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems |
| Current Sensing Range | 100A |
| Sensor Type | Hall Effect, Open Loop |
| Polarization | Bidirectional |
| Output Type | Ratiometric, Voltage |
| Sensitivity | 20mV/A |
| Frequency Range | DC ~ 120kHz |
| Supply Voltage | 3V ~ 5.5V |
| Operating Temperature | -20°C ~ 85°C |
| Mounting Type | Through Hole |
| Package Type | 5-CA Formed Leads, PFF |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the ACS756SCA-100B-PFF-T is determined by the following critical parameters:
- Current sensing capability: 100A
- Sensor technology: Hall Effect, Open Loop
- Output configuration: Ratiometric voltage output
- Sensitivity: 20mV/A
- Frequency response: DC ~ 120kHz
- Supply voltage compatibility: 3V ~ 5.5V
- Operating temperature range: -20°C ~ 85°C
- Mounting configuration: Through Hole
- Electrical and mechanical compatibility within the ACS756 product family
The ACS756SCB-100B-PFF-T qualifies as a direct substitute based on identical electrical specifications and functional parameters. The primary difference is the package lead configuration (5-CB versus 5-CA formed leads), which represents a mechanical variation within the same product family while maintaining full electrical equivalence.
Parameter Comparison
| Parameter | ACS756SCA-100B-PFF-T | ACS756SCB-100B-PFF-T |
|---|---|---|
| Manufacturer | Allegro MicroSystems | Allegro MicroSystems |
| Current Sensing | 100A | 100A |
| Sensor Type | Hall Effect, Open Loop | Hall Effect, Open Loop |
| Number of Channels | 1 | 1 |
| Output | Ratiometric, Voltage | Ratiometric, Voltage |
| Sensitivity | 20mV/A | 20mV/A |
| Frequency | DC ~ 120kHz | DC ~ 120kHz |
| Linearity | ±1.75% | ±1.75% |
| Accuracy | ±7% | ±7% |
| Supply Voltage | 3V ~ 5.5V | 3V ~ 5.5V |
| Response Time | 3µs | 3µs |
| Current Supply (Max) | 14mA | 14mA |
| Operating Temperature | -20°C ~ 85°C | -20°C ~ 85°C |
| Polarization | Bidirectional | Bidirectional |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 5-CA Formed Leads, PFF | 5-CB Formed Leads, PFF |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The ACS756SCB-100B-PFF-T is the qualified substitute for the ACS756SCA-100B-PFF-T based on the following engineering criteria:
Electrical Equivalence: All functional electrical parameters are identical, including current sensing range, output sensitivity, frequency response, supply voltage requirements, and operating temperature specifications.
Compliance Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production environments.
Product Status Advantage: The ACS756SCB-100B-PFF-T carries active product status, providing assured long-term availability and manufacturing support compared to the obsolete ACS756SCA-100B-PFF-T.
Package Compatibility: The mechanical difference between 5-CA and 5-CB formed leads requires PCB layout verification to confirm lead positioning compatibility with existing through-hole footprints. Both configurations maintain identical electrical performance and thermal characteristics.
Frequently Asked Questions (FAQ)
Q: What is the primary difference between ACS756SCA-100B-PFF-T and ACS756SCB-100B-PFF-T?
A: The components are electrically identical. The difference is in the formed lead configuration: 5-CA versus 5-CB. This affects physical lead positioning on the PCB but does not impact electrical function, sensitivity, or performance specifications.
Q: Can I use ACS756SCB-100B-PFF-T as a direct replacement in existing designs?
A: Electrical substitution is valid. However, the formed lead configuration difference requires verification that the PCB through-hole footprint accommodates the 5-CB lead geometry. If the existing PCB is designed specifically for 5-CA leads, mechanical interference may occur.
Q: Are there any compliance or certification differences between these parts?
A: No. Both components maintain identical RoHS3 compliance, REACH unaffected status, MSL rating of 1 (Unlimited), and ECCN/HTSUS classifications.
Q: Why is the ACS756SCA-100B-PFF-T listed as obsolete?
A: Product status reflects Allegro MicroSystems' manufacturing and support decisions. The ACS756SCB-100B-PFF-T, with active status, represents the current production equivalent within the ACS756 family.
Q: What parameters must remain constant for substitution to be valid?
A: Current sensing range (100A), sensor type (Hall Effect, Open Loop), output type (Ratiometric Voltage), sensitivity (20mV/A), frequency response (DC ~ 120kHz), supply voltage (3V ~ 5.5V), and operating temperature range (-20°C ~ 85°C) must all match exactly.
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