STR3A455D Equivalent & Substitute Parts

Part Overview

The STR3A455D 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 65kHz switching frequency and delivers 65 watts of power output. The device features isolated output, internal switching capability, and comprehensive fault protection including current limiting, overload, overvoltage, and overtemperature protection. The STR3A455D is an active product with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications, particularly when inventory availability or specific packaging requirements necessitate alternative part selection.

Substiute Parts

STR3A455D

Sanken Electric USA Inc.In Stock: 2224STR3A455D 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

Substitute parts for the STR3A455D are identified based on strict electrical and mechanical parameter equivalence within the Sanken Electric STR3A series offline flyback converter family. All substitute parts maintain identical specifications across the following critical parameters: manufacturer (Sanken Electric USA Inc.), topology (Flyback), voltage breakdown rating (650V), supply voltage range (8.5V ~ 32V), startup voltage (15V), switching frequency (65kHz), duty cycle (80%), output isolation (Isolated), internal switching capability (Yes), 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 - Unlimited), and REACH unaffected status.

The primary differentiating parameter among substitute parts is power output rating in watts. The STR3A455D delivers 65W, while substitute parts STR3A451 and STR3A451D deliver 37W, and STR3A453D delivers 53W. These power rating variations reflect different internal design configurations within the same topology and package family, allowing selection based on specific application power requirements while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts—STR3A451, STR3A451D, and STR3A453D—are active products with full RoHS3 compliance and REACH unaffected status, matching the regulatory and compliance profile of the STR3A455D. Selection among these parts is determined by application power requirements and packaging specifications.

The STR3A451 and STR3A451D are functionally equivalent 37-watt converters suitable for applications requiring lower power output than the 65-watt STR3A455D. These parts are interchangeable with each other and differ only in packaging designation (Tube packaging specified for both).

The STR3A453D is a 53-watt converter positioned between the lower-power STR3A451 series and the higher-power STR3A455D. This part provides intermediate power capability while maintaining full electrical and mechanical compatibility.

All parts share identical electrical characteristics including voltage ratings, switching frequency, topology, protection features, and temperature operating range. Through-hole mounting compatibility and 8-DIP package dimensions ensure direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can STR3A451 or STR3A451D be used as direct replacements for STR3A455D?

A: STR3A451 and STR3A451D are electrically and mechanically compatible with STR3A455D across all parameters except power output rating. STR3A451 and STR3A451D deliver 37 watts compared to 65 watts for STR3A455D. These parts are suitable for applications where the lower power rating meets design requirements.

Q: What is the difference between STR3A451 and STR3A451D?

A: STR3A451 and STR3A451D are functionally identical 37-watt converters. Both maintain the same electrical specifications, package type (8-DIP), and mounting configuration. The designation difference reflects packaging format designation only.

Q: Is STR3A453D a suitable substitute for STR3A455D?

A: STR3A453D is electrically and mechanically compatible with STR3A455D. The primary difference is power output: STR3A453D delivers 53 watts compared to 65 watts for STR3A455D. STR3A453D is suitable for applications where 53-watt output capacity meets design specifications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts—STR3A451, STR3A451D, and STR3A453D—are RoHS3 compliant and REACH unaffected, matching the regulatory status of STR3A455D.

Q: Do substitute parts require PCB layout modifications?

A: No. All substitute parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging. Direct board-level substitution is possible without layout changes.

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

A: All parts, including STR3A455D and its substitutes, operate across the temperature range of -40°C to 125°C.

Q: Are there inventory differences among the substitute parts?

A: Inventory levels vary: STR3A455D has 2150 pieces in stock, STR3A451 has 887 pieces, STR3A451D has 865 pieces, and STR3A453D has 691 pieces. Availability should be confirmed for specific procurement timelines.