STR-X6757N Equivalent & Substitute Parts

Part Overview

The STR-X6757N is an offline switch IC designed for flyback converter topologies, manufactured by Sanken Electric USA Inc. This component operates in the 19kHz to 25kHz switching frequency range and is housed in a TO-3P package with formed leads for through-hole mounting. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

STR-X6757N

Sanken Electric USA Inc.In Stock: 2210STR-X6757N Datasheet

Current PartRFQ

STR-X6737

Sanken Electric USA Inc.In Stock: 2314STR-X6737 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STR-X6757N is determined by strict equivalence across the following critical parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Internal Switch: Integrated switching element
• Voltage Ratings: Breakdown voltage of 500V, supply range of 9.7V ~ 35V, startup voltage of 18.2V
• Switching Frequency: 19kHz ~ 25kHz operating range
• Fault Protection: Current limiting, overload, and overvoltage protection
• Control Features: Soft start functionality
• Package: TO-3P-7 with formed leads for through-hole mounting
• Temperature Range: -20°C ~ 125°C (TA)
• Compliance: RoHS compliant, MSL 1

The STR-X6737 meets all these criteria and is classified as a parametric equivalent within the STR-X6700 series.

Parameter Comparison

Engineering Selection Recommendations

Both the STR-X6757N and STR-X6737 are classified as obsolete products. Selection between these components should be based on current inventory availability and procurement lead times. The STR-X6737 is listed with 2284 pieces in new original stock, while the STR-X6757N has 2200 pieces available. Both components carry identical electrical specifications, thermal ratings, and compliance certifications (RoHS compliant, MSL 1). The choice between these parts does not introduce technical risk when substituting in existing designs, as all critical parameters remain constant.

Frequently Asked Questions (FAQ)

Q: Can the STR-X6737 be used as a direct replacement for the STR-X6757N?

A: Yes. Both components share identical electrical specifications, including voltage ratings, switching frequency, fault protection features, and operating temperature range. The TO-3P package and through-hole mounting are identical, allowing direct substitution without circuit modification.

Q: Are there differences in power handling capability between these parts?

A: The STR-X6737 is specified at 290W. The STR-X6757N does not include a power rating in the provided specifications. Both components operate within the same voltage and frequency parameters.

Q: What is the significance of the TO-3P package for these components?

A: The TO-3P package is a through-hole mounted component with formed leads, suitable for PCB insertion and wave soldering processes. Both substitute parts use identical packaging, ensuring mechanical and thermal compatibility in existing board designs.

Q: Are both parts RoHS compliant?

A: Yes. Both the STR-X6757N and STR-X6737 are RoHS compliant with MSL 1 (unlimited moisture sensitivity level), meeting environmental and regulatory requirements for modern electronics manufacturing.

Q: What protection features are included in these offline switch ICs?

A: Both components include current limiting, overload protection, and overvoltage protection. Soft start control is integrated to manage inrush current during power-up sequences.