LNK6427D Equivalent & Substitute Parts

Part Overview

The LNK6427D is an offline switch flyback converter IC manufactured by Power Integrations, designed for isolated power supply applications. This device integrates a high-voltage internal switch with comprehensive fault protection in a compact 8-SOIC package. The LNK6427D is part of the LinkSwitch™-3 series and has been discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

LNK6427D

Power IntegrationsIn Stock: 2241LNK6427D Datasheet

Current PartRFQ

LNK6417D

Power IntegrationsIn Stock: 8605LNK6417D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNK6427D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Voltage breakdown rating: 725V
• Power rating: 7.5 W
• Switching frequency: Up to 85kHz
• Duty cycle: 55%
• Fault protection features: Current Limiting, Open Loop, Over Temperature, Short Circuit
• Output isolation: Isolated topology
• Internal switch configuration: Integrated

Mechanical & Package Parameters:

• Package type: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Supplier device package: SO-8C
• Mounting type: Surface Mount

Compliance & Environmental Parameters:

• RoHS Compliance: Required
• Moisture Sensitivity Level: 1 (Unlimited)
• Operating temperature range: -40°C ~ 150°C (TJ)

The LNK6417D meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The LNK6417D is a direct parametric equivalent to the LNK6427D. Both devices are manufactured by Power Integrations within the LinkSwitch™-3 series and share identical electrical specifications, package configurations, and compliance certifications.

Selection Basis:

The LNK6417D is suitable for direct substitution in applications currently designed for the LNK6427D. The substitution is based on:

• Identical electrical performance across all specified parameters
• Identical package and pinout configuration (8-SOIC SO-8C)
• Identical fault protection and control features
• Identical compliance status (RoHS Compliant, REACH Unaffected, EAR99 classification)
• Identical operating temperature range and moisture sensitivity rating

Both parts are discontinued at DiGi Electronics. The LNK6417D currently maintains higher inventory availability (8563 Pcs) compared to the LNK6427D (2230 Pcs), making it the preferred selection for procurement purposes.

Frequently Asked Questions (FAQ)

Q: Can the LNK6417D be used as a direct replacement for the LNK6427D?

A: Yes. The LNK6417D is a parametric equivalent with identical electrical specifications, package configuration, and compliance certifications. No circuit modifications are required for substitution.

Q: Are the pinouts identical between LNK6427D and LNK6417D?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width), 7 Leads package with SO-8C supplier device package designation. Pinout compatibility is confirmed.

Q: What is the difference between the LNK6427D and LNK6417D?

A: Based on provided specifications, both parts are electrically and mechanically identical. The primary difference is the base product number designation (LNK6427 vs. LNK6417) and current inventory availability.

Q: Are both parts RoHS compliant?

A: Yes. Both the LNK6427D and LNK6417D are RoHS Compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

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

A: Both devices operate across -40°C to 150°C junction temperature (TJ), suitable for industrial and consumer applications.

Q: Can these parts be used in isolated power supply designs?

A: Yes. Both the LNK6427D and LNK6417D feature isolated output topology and are designed for offline flyback converter applications up to 7.5 W power rating.

Q: What fault protection features are included?

A: Both devices include Current Limiting, Open Loop, Over Temperature, and Short Circuit protection.