FDA215S Equivalent & Substitute Parts

Part Overview

The FDA215S is an optoisolator gate driver manufactured by IXYS Integrated Circuits Division, designed for high-voltage isolation applications. This 2-channel optical coupling device provides 3750Vrms isolation with a propagation delay of 5ms maximum and operates across the industrial temperature range of -40°C to 85°C. The device is actively produced, RoHS3 compliant, and widely stocked. Substitute parts are identified when the main part becomes unavailable, when procurement lead times are extended, or when design requirements permit higher isolation voltage ratings or alternative output topologies.

Substiute Parts

FDA215S

IXYS Integrated Circuits DivisionIn Stock: 1235FDA215S Datasheet

Current PartRFQ

LH1262CAC

Vishay Semiconductor Opto DivisionIn Stock: 2131LH1262CAC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LH1262CAC from Vishay Semiconductor Opto Division qualifies as a substitute based on the following alignment criteria:

Matching Parameters:

• Number of Channels: 2 (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 8-SMD (identical)
• Operating Temperature Range: -40°C to 85°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Enhanced Specifications:

• Voltage - Isolation: 5300Vrms (exceeds FDA215S requirement of 3750Vrms)
• Forward Voltage (Vf): 1.26V (comparable to FDA215S 1.2V)
• DC Forward Current (If): 50 mA (lower than FDA215S 100 mA, suitable for lower-power applications)

The LH1262CAC operates as a photovoltaic output optoisolator, whereas the FDA215S is a gate driver with optical coupling. Both devices maintain the same channel count, package footprint, and environmental specifications, making them mechanically and thermally interchangeable in 8-SMD surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

Both the FDA215S and LH1262CAC are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for production environments. The FDA215S remains the primary choice for gate driver applications requiring the specified 3750Vrms isolation and 100 mA forward current capability. The LH1262CAC serves as a direct substitute when FDA215S availability is constrained, provided that the application tolerates the photovoltaic output topology, higher isolation voltage (5300Vrms), and reduced maximum forward current (50 mA). Both devices maintain identical operating temperature ranges and 8-SMD surface mount packaging, ensuring mechanical and thermal compatibility in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the LH1262CAC replace the FDA215S in all applications?

A: The LH1262CAC is mechanically and thermally compatible due to identical 8-SMD packaging and operating temperature range. However, functional compatibility depends on circuit requirements. The LH1262CAC uses photovoltaic output topology versus the FDA215S gate driver topology, and the reduced maximum forward current (50 mA vs. 100 mA) may affect input drive requirements. Circuit validation is necessary for applications with specific output or input current demands.

Q: What is the significance of the higher isolation voltage in the LH1262CAC?

A: The LH1262CAC provides 5300Vrms isolation compared to the FDA215S 3750Vrms. This higher rating offers additional safety margin in high-voltage isolation applications and does not create compatibility issues when substituting into designs rated for 3750Vrms or lower isolation requirements.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both the FDA215S and LH1262CAC operate across -40°C to 85°C, meeting industrial temperature specifications. Both maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings.

Q: What packaging considerations apply to these parts?

A: Both devices use 8-SMD surface mount packages with gull wing leads. The footprint is identical, allowing direct PCB layout compatibility without redesign. Reflow soldering parameters should follow the respective manufacturer datasheets.

Q: How do the forward voltage and current specifications compare?

A: The FDA215S specifies 1.2V typical forward voltage with 100 mA maximum DC forward current. The LH1262CAC specifies 1.26V typical forward voltage with 50 mA maximum DC forward current. The LH1262CAC requires lower input current, which may reduce input drive circuit power dissipation in applications where this lower current is acceptable.