STR3A154D Equivalent & Substitute Parts

Part Overview

The STR3A154D is an offline switch flyback converter IC manufactured by Sanken Electric USA Inc., designed for isolated power management applications. This 8-DIP through-hole component operates at 67 kHz switching frequency with 60 W output power capability and integrated fault protection including current limiting, overload, overvoltage, and overtemperature protection. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity.

Substiute Parts

STR3A154D

Sanken Electric USA Inc.In Stock: 835STR3A154D Datasheet

Current PartRFQ

STR3A151

Sanken Electric USA Inc.In Stock: 2915STR3A151 Datasheet

Parametric EquivalentRFQ

STR3A151D

Sanken Electric USA Inc.In Stock: 4342STR3A151D Datasheet

Parametric EquivalentRFQ

STR3A152

Sanken Electric USA Inc.In Stock: 914STR3A152 Datasheet

Parametric EquivalentRFQ

STR3A152D

Sanken Electric USA Inc.In Stock: 3026STR3A152D Datasheet

Parametric EquivalentRFQ

STR3A153

Sanken Electric USA Inc.In Stock: 2074STR3A153 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STR3A154D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 650V
• Voltage - Supply (Vcc/Vdd): 8.1V ~ 32V
• Voltage - Start Up: 15.3 V
• Frequency - Switching: 67 kHz
• Duty Cycle: 74%
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage
• Operating Temperature: -40°C ~ 115°C (TA)
• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Allows Substitution):

• Power (Watts): The STR3A154D rated at 60 W can be substituted with parts rated at 37 W, 45 W, or 53 W, provided all other parameters remain identical. Lower-rated parts operate within the same electrical framework and can function in applications not requiring the full 60 W capacity.

All substitute parts belong to the STR3A100 series and maintain identical electrical characteristics except for power rating variance.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the STR3A154D within the STR3A100 series framework. Selection among STR3A151, STR3A151D, STR3A152, STR3A152D, and STR3A153 depends solely on power rating requirements:

• STR3A151 / STR3A151D (37 W): Suitable for applications requiring up to 37 W output power
• STR3A152 / STR3A152D (45 W): Suitable for applications requiring up to 45 W output power
• STR3A153 (53 W): Suitable for applications requiring up to 53 W output power

All parts are RoHS compliant with MSL rating of 1 (unlimited moisture sensitivity), ensuring compliance with environmental and reliability standards. The through-hole 8-DIP package format permits direct PCB substitution without layout modification. All parts share identical electrical specifications for voltage breakdown, supply voltage range, startup voltage, switching frequency, duty cycle, and fault protection features.

Frequently Asked Questions (FAQ)

Q: Can STR3A151 or STR3A151D replace STR3A154D in my design?

A: Yes. Both parts are electrically and mechanically equivalent to STR3A154D. The STR3A151 and STR3A151D are rated at 37 W compared to the STR3A154D's 60 W rating. Substitution is valid if your application power requirement does not exceed 37 W.

Q: What is the difference between STR3A151 and STR3A151D?

A: Both parts are parametrically identical with 37 W power rating. The difference lies in packaging designation. STR3A151 is supplied in bulk packaging, while STR3A151D is supplied in tape and reel format. Electrical performance and pin configuration are identical.

Q: Can I use STR3A153 (53 W) in place of STR3A154D (60 W)?

A: STR3A153 is electrically equivalent to STR3A154D across all critical parameters. However, the 53 W rating is lower than the 60 W rating of STR3A154D. Use STR3A153 only if your application power requirement does not exceed 53 W.

Q: Are all substitute parts in the same 8-DIP package?

A: Yes. All substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package. Direct PCB substitution is possible without layout changes.

Q: Do all substitute parts have the same fault protection features?

A: Yes. All parts in this substitution group include identical fault protection: current limiting, overload protection, overvoltage protection, and overtemperature protection.

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

A: All parts operate across -40°C to 115°C (TA), providing identical thermal performance specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All parts listed are RoHS compliant with MSL rating of 1 (unlimited), meeting environmental and reliability requirements.