SAI01V1 Equivalent & Substitute Parts

Part Overview

The SAI01V1 is a buck switching regulator IC manufactured by Sanken Electric USA Inc., designed to deliver a fixed 5V output at 500mA from input voltages ranging from 7V to 33V. This component operates at a switching frequency of 60kHz and is housed in a 4-SMD, Gull Wing package. The SAI01V1 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SAI01V1

Sanken Electric USA Inc.In Stock: 919SAI01V1 Datasheet

Current PartRFQ

LM2574MX-5.0/NOPB

Texas InstrumentsIn Stock: 40358LM2574MX-5.0/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SAI01V1 are identified based on the following critical electrical and mechanical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive fixed output
• Output Voltage: 5V fixed output
• Output Current: 500mA minimum capability
• Input Voltage Range: Minimum 7V to maximum 33V input tolerance
• Switching Frequency: Approximately 60kHz operation
• Mounting: Surface mount technology
• Regulatory Compliance: RoHS compliance requirement

The LM2574MX-5.0/NOPB from Texas Instruments meets these core substitution criteria. While package geometry differs (14-SOIC versus 4-SMD Gull Wing), the electrical specifications align within acceptable parameters for buck regulator applications requiring 5V/500mA output.

Parameter Comparison

Engineering Selection Recommendations

The LM2574MX-5.0/NOPB is an active product from Texas Instruments and represents a viable substitute for the obsolete SAI01V1 based on electrical equivalence. Both devices deliver identical output specifications (5V, 500mA) and operate within compatible input voltage ranges. The LM2574MX-5.0/NOPB provides extended input voltage tolerance (4V to 40V versus 7V to 33V) and lower operating temperature minimum (-40°C versus -30°C), offering broader application flexibility.

Both parts maintain RoHS compliance (RoHS Compliant and ROHS3 Compliant respectively), satisfying regulatory requirements for modern electronics manufacturing. The primary design consideration is package footprint transition from 4-SMD Gull Wing to 14-SOIC, which requires PCB layout modification but does not affect electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the LM2574MX-5.0/NOPB directly replace the SAI01V1 without circuit modifications?

A: Electrical substitution is valid; however, package geometry differs significantly (4-SMD Gull Wing versus 14-SOIC). PCB layout redesign is required. Circuit topology and external component values may require adjustment based on the specific application schematic.

Q: What are the key electrical differences between these parts?

A: Both deliver 5V/500mA output. The LM2574MX-5.0/NOPB accepts lower minimum input voltage (4V versus 7V) and higher maximum input voltage (40V versus 33V). Switching frequency differs slightly (52kHz versus 60kHz), which may affect external component selection for filtering and stability.

Q: Why is the SAI01V1 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The LM2574MX-5.0/NOPB, maintained as an active product by Texas Instruments, provides functional continuity for new designs and production support.

Q: Are there compliance or certification differences?

A: Both parts are RoHS compliant. The LM2574MX-5.0/NOPB carries ROHS3 certification and REACH Unaffected status, meeting current regulatory standards for electronics manufacturing and distribution.

Q: What inventory considerations apply?

A: The SAI01V1 has 844 pieces in stock (new original). The LM2574MX-5.0/NOPB has significantly higher availability at 40,285 pieces, supporting sustained production requirements and reducing supply chain risk.