TNY255GN Equivalent & Substitute Parts Reference

Part Overview

The TNY255GN is an offline switch flyback converter IC from Power Integrations' TinySwitch® series, designed for isolated power supply applications. This 8-SMD surface mount device operates at 130kHz switching frequency with 6.5W output power capability and 700V breakdown voltage rating. The device integrates an internal switch with current limiting and over-temperature fault protection.

The TNY255GN is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain identical electrical specifications, thermal characteristics, and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

TNY255GN

Power IntegrationsIn Stock: 1459TNY255GN Datasheet

Current PartRFQ

TNY255GN-TL

Power IntegrationsIn Stock: 31058TNY255GN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TNY255GN is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Topology: Flyback converter architecture
• Voltage - Breakdown: 700V
• Frequency - Switching: 130kHz
• Power (Watts): 6.5 W
• Duty Cycle: 67%
• Output Isolation: Isolated configuration
• Internal Switch(s): Integrated switch present
• Fault Protection: Current Limiting and Over Temperature protection
• Control Features: EN (Enable) control

Mechanical Equivalence Requirements:

• Package / Case: 8-SMD, Gull Wing
• Mounting Type: Surface Mount
• Supplier Device Package: 8-SMD

Compliance Requirements:

• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level (MSL): 4 (72 Hours)
• Operating Temperature Range: -40°C ~ 150°C (TJ)

Parts meeting all these criteria are classified as direct substitutes. Packaging format variations (such as Tape & Reel versus bulk) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TNY255GN-TL is a direct electrical and mechanical substitute for the TNY255GN. Both devices are manufactured by Power Integrations and share identical specifications across all critical parameters: topology, voltage rating, switching frequency, power rating, duty cycle, isolation configuration, protection features, and thermal characteristics.

The primary distinction between these parts is packaging format. The TNY255GN is supplied in bulk packaging, while the TNY255GN-TL is supplied in Tape & Reel (TR) format. This packaging difference does not affect component functionality, electrical performance, or mechanical compatibility on the PCB.

Both parts carry identical compliance certifications: RoHS Compliant status and MSL 4 (72 Hours) moisture sensitivity rating. Both are classified as legacy products—TNY255GN is discontinued at DiGi Electronics, and TNY255GN-TL is marked "Not For New Designs." For new design applications, evaluation of current-generation TinySwitch® alternatives from Power Integrations is recommended, though this reference addresses substitution for existing TNY255GN implementations.

The TNY255GN-TL is suitable for direct replacement in production environments where Tape & Reel packaging is compatible with assembly processes. No circuit modifications, PCB layout changes, or firmware updates are required.

Frequently Asked Questions (FAQ)

Q: Can TNY255GN-TL replace TNY255GN in existing designs?

A: Yes. The TNY255GN-TL is a direct substitute. All electrical specifications, thermal ratings, mechanical dimensions, and compliance certifications are identical. The only difference is packaging format (Tape & Reel versus bulk). No design changes are required.

Q: What is the difference between TNY255GN and TNY255GN-TL?

A: The TNY255GN and TNY255GN-TL are electrically and mechanically identical. The "-TL" suffix indicates Tape & Reel packaging format, while the standard TNY255GN is supplied in bulk. Both use the same 8-SMD, Gull Wing package and are mounted identically on PCBs.

Q: Are there any compatibility issues with PCB assembly?

A: No compatibility issues exist. Both parts use the same 8-SMD surface mount package with identical pin configuration and footprint. Assembly equipment and reflow profiles remain unchanged. Tape & Reel packaging (TNY255GN-TL) is standard for automated pick-and-place assembly.

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

A: Both TNY255GN and TNY255GN-TL operate across -40°C to 150°C junction temperature (TJ). This range covers industrial and consumer applications.

Q: Are these parts RoHS compliant?

A: Yes. Both TNY255GN and TNY255GN-TL are RoHS Compliant and carry identical compliance certifications.

Q: What does MSL 4 (72 Hours) mean?

A: Moisture Sensitivity Level 4 indicates the component requires controlled storage conditions. Parts must be stored in dry conditions and have a floor life of 72 hours after exposure to ambient humidity before soldering. Both parts share this specification.

Q: Why is TNY255GN discontinued?

A: The TNY255GN is discontinued at DiGi Electronics as a stocking decision. The TNY255GN-TL remains available with higher inventory levels. Both are legacy products; Power Integrations recommends current-generation alternatives for new designs.

Q: Can I use TNY255GN-TL in new product designs?

A: The TNY255GN-TL is marked "Not For New Designs." While it functions identically to TNY255GN, Power Integrations recommends evaluating current TinySwitch® series devices for new applications to ensure long-term availability and access to latest performance improvements.