STR3A453 Equivalent & Substitute Parts

Part Overview

The STR3A453 is an AC/DC converter integrated circuit manufactured by Sanken Electric USA Inc., designed for offline flyback topology applications. This Power Management (PMIC) component operates at 65kHz switching frequency with 53W power output capability and integrated internal switching functionality. The device is classified as Active product status and is ROHS3 compliant with REACH unaffected designation. Alternative equivalent parts are necessary when addressing specific packaging requirements, inventory availability, or power output specifications within the same electrical and mechanical parameter set.

Substiute Parts

STR3A453

Sanken Electric USA Inc.In Stock: 708STR3A453 Datasheet

Current PartRFQ

STR3A451

Sanken Electric USA Inc.In Stock: 961STR3A451 Datasheet

Parametric EquivalentRFQ

STR3A451D

Sanken Electric USA Inc.In Stock: 961STR3A451D Datasheet

Parametric EquivalentRFQ

STR3A453D

Sanken Electric USA Inc.In Stock: 737STR3A453D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STR3A453 is determined by strict adherence to the following core parameters: topology (Flyback), output isolation (Isolated), internal switching capability (Yes), voltage breakdown rating (650V), supply voltage range (8.5V ~ 32V), startup voltage (15V), switching frequency (65kHz), duty cycle (80%), 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), and mounting type (Through Hole).

The substitute parts STR3A451, STR3A451D, and STR3A453D maintain identical electrical and mechanical specifications with the STR3A453 across all critical parameters listed above. The primary differentiator among these parts is power output capacity: the STR3A453 and STR3A453D deliver 53W, while the STR3A451 and STR3A451D deliver 37W. Packaging format (Tube for substitutes versus unspecified for main part) and inventory levels represent secondary distinctions that do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All four parts—STR3A453, STR3A451, STR3A451D, and STR3A453D—maintain Active product status and carry identical compliance certifications: ROHS3 Compliant and REACH Unaffected. Selection between these parts is determined by power output requirements and packaging format availability.

For applications requiring 53W output capacity, select either STR3A453 or STR3A453D. For applications requiring 37W output capacity, select either STR3A451 or STR3A451D. All parts are electrically and mechanically interchangeable within their respective power output class, with identical pin configuration, thermal operating range, and protection feature sets.

Packaging format (Tube) is specified for STR3A451, STR3A451D, and STR3A453D. The main part STR3A453 does not specify packaging format in the provided data. This distinction affects supply chain logistics and component handling but does not impact electrical performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can STR3A451 or STR3A451D be used as direct replacements for STR3A453?

A: STR3A451 and STR3A451D are electrically and mechanically compatible with STR3A453 across all specified parameters except power output. STR3A451 and STR3A451D deliver 37W, while STR3A453 delivers 53W. Direct substitution is valid only when the application power requirement does not exceed 37W.

Q: What is the difference between STR3A453 and STR3A453D?

A: STR3A453 and STR3A453D are identical in all electrical and mechanical specifications. The primary distinction is packaging format: STR3A453D is supplied in Tube packaging, while STR3A453 packaging format is not specified in the provided data. Both deliver 53W output and maintain identical pin configuration and performance characteristics.

Q: Are STR3A451 and STR3A451D interchangeable?

A: STR3A451 and STR3A451D are identical in all electrical and mechanical specifications. Both deliver 37W output and maintain identical pin configuration and performance characteristics. The distinction is packaging format: STR3A451D is supplied in Tube packaging.

Q: What are the critical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: Flyback topology, Isolated output, internal switching capability, 650V breakdown voltage, 8.5V ~ 32V supply voltage range, 15V startup voltage, 65kHz switching frequency, 80% duty cycle, Current Limiting/Over Load/Over Temperature/Over Voltage fault protection, Soft Start control feature, -40°C ~ 125°C operating temperature range, 8-DIP (0.300", 7.62mm) package, and Through Hole mounting type. Power output (37W or 53W) is the primary variable parameter.

Q: Are all four parts ROHS3 compliant?

A: Yes. STR3A453, STR3A451, STR3A451D, and STR3A453D are all ROHS3 Compliant with REACH Unaffected status.

Q: What is the moisture sensitivity level for these parts?

A: All four parts carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can these parts be used in applications with operating temperatures below -40°C or above 125°C?

A: No. All four parts are rated for -40°C ~ 125°C operating temperature range. Applications requiring operation outside this range require alternative components.