STR-X6759B Equivalent & Substitute Parts

Part Overview

The STR-X6759B 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-X6759B

Sanken Electric USA Inc.In Stock: 986STR-X6759B 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-X6759B is determined by strict equivalence across the following critical parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Internal Switch: Integrated switching element
• Voltage - Breakdown: 500V rating
• Voltage - Supply Range: 9.7V ~ 35V
• Voltage - Start Up: 18.2V
• Switching Frequency: 19kHz ~ 25kHz
• Fault Protection: Current Limiting, Over Load, Over Voltage
• Control Features: Soft Start capability
• Operating Temperature Range: -20°C ~ 125°C
• Package / Case: TO-3P-7 Full Pack, Formed Leads
• Mounting Type: Through Hole

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-X6759B and STR-X6737 are classified as obsolete products. The STR-X6737 is designated as a parametric equivalent and shares identical electrical and mechanical specifications with the STR-X6759B. Selection between these components should be based on availability and inventory status. Both components carry RoHS Compliance certification and MSL Level 1 rating, meeting current environmental and moisture handling requirements. The STR-X6737 currently maintains higher inventory availability (2284 pcs) compared to the STR-X6759B (968 pcs).

Frequently Asked Questions (FAQ)

Q: Can the STR-X6737 be used as a direct replacement for the STR-X6759B?

A: Yes. The STR-X6737 is a parametric equivalent with identical electrical specifications, including voltage ratings, switching frequency, fault protection, and operating temperature range. Both components use the same TO-3P-7 package with formed leads for through-hole mounting.

Q: Are there any differences in package or pinout between these parts?

A: No. Both the STR-X6759B and STR-X6737 use the TO-3P-7 Full Pack with formed leads. The package configuration and mounting type are identical, allowing direct PCB substitution without layout modifications.

Q: What is the significance of the obsolete product status?

A: Both components are classified as obsolete, indicating they are no longer in active production. Substitution between these parts is necessary for design continuity and production support. Inventory availability should be verified before component selection.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the STR-X6759B and STR-X6737 are RoHS Compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current environmental and handling standards.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by equivalence in breakdown voltage (500V), supply voltage range (9.7V ~ 35V), startup voltage (18.2V), switching frequency (19kHz ~ 25kHz), fault protection features (Current Limiting, Over Load, Over Voltage), and soft start control capability.