STR3A253D Equivalent & Substitute Parts

Part Overview

The STR3A253D is an AC/DC converter integrated circuit manufactured by Sanken Electric USA Inc., classified as a Power Management (PMIC) component. This offline flyback topology converter operates at 67 kHz switching frequency with isolated output and internal switching capability. The STR3A253D is an active product with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component selection flexibility for procurement, inventory management, or design optimization within the STR3A200 series.

Substiute Parts

STR3A253D

Sanken Electric USA Inc.In Stock: 1128STR3A253D Datasheet

Current PartRFQ

STR3A251

Sanken Electric USA Inc.In Stock: 1057STR3A251 Datasheet

Parametric EquivalentRFQ

STR3A251D

Sanken Electric USA Inc.In Stock: 913STR3A251D Datasheet

Parametric EquivalentRFQ

STR3A255D

Sanken Electric USA Inc.In Stock: 1244STR3A255D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STR3A253D are identified within the STR3A200 series based on strict electrical and mechanical parameter equivalence. All substitute parts share identical specifications across the following critical parameters: manufacturer (Sanken Electric USA Inc.), topology (Flyback), output isolation (Isolated), internal switching capability (Yes), voltage breakdown rating (650V), startup voltage (47V), supply voltage range (8.5V ~ 32V), duty cycle (75%), switching frequency (67 kHz), fault protection features (Current Limiting, Over Load, Over Temperature, Over Voltage), control features (Soft Start), operating temperature range (-40°C ~ 125°C), package type (8-DIP 0.300", 7.62mm), mounting type (Through Hole), RoHS3 compliance, MSL rating (1), and REACH status (Unaffected).

The primary differentiating parameter among substitute parts is power rating in watts. The STR3A253D operates at 53W, with substitute options available at 37W (STR3A251, STR3A251D) and 65W (STR3A255D). Selection of substitute parts depends on application power requirements within the specified range.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts (STR3A251, STR3A251D, STR3A255D) maintain active product status with full RoHS3 compliance and REACH unaffected certification, matching the regulatory and compliance profile of the STR3A253D. Selection among substitute parts is determined by application power requirements:

STR3A251 and STR3A251D are suitable for applications requiring 37W power output. Both parts are electrically and mechanically equivalent, with packaging differentiation indicated by the "D" suffix designation.

STR3A255D is suitable for applications requiring 65W power output, providing higher power capacity within the same electrical and mechanical framework.

All substitute parts operate within identical electrical parameters: 650V breakdown voltage, 8.5V to 32V supply range, 67 kHz switching frequency, 75% duty cycle, and -40°C to 125°C operating temperature. Through-hole 8-DIP packaging ensures mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between STR3A253D and its substitute parts?

A: The primary difference is power rating. STR3A253D operates at 53W, while STR3A251/STR3A251D operate at 37W and STR3A255D operates at 65W. All other electrical and mechanical parameters remain identical.

Q: Can STR3A251 or STR3A251D be used in place of STR3A253D?

A: STR3A251 and STR3A251D are suitable only for applications requiring 37W or less. They share identical electrical characteristics and package specifications but have lower power capacity than the STR3A253D.

Q: Can STR3A255D be used in place of STR3A253D?

A: STR3A255D is suitable for applications requiring up to 65W power output. It shares identical electrical characteristics and package specifications with the STR3A253D but provides higher power capacity.

Q: What is the difference between STR3A251 and STR3A251D?

A: Both parts are electrically and mechanically equivalent with identical 37W power ratings. The "D" suffix indicates packaging or manufacturing designation. Consult specific datasheet documentation for detailed packaging distinctions.

Q: Are all substitute parts compatible with existing PCB designs for STR3A253D?

A: Yes. All substitute parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB layouts designed for the STR3A253D.

Q: Do all substitute parts meet the same compliance standards as STR3A253D?

A: Yes. All substitute parts are RoHS3 compliant, REACH unaffected, and maintain active product status matching the regulatory profile of the STR3A253D.

Q: What fault protection features are included in substitute parts?

A: All substitute parts include identical fault protection: Current Limiting, Over Load, Over Temperature, and Over Voltage protection, with Soft Start control features.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate across the identical temperature range of -40°C to 125°C (TA), matching the STR3A253D specifications.