VHFD16-08IO1 Equivalent & Substitute Parts

Part Overview

The VHFD16-08IO1 is a single-phase SCR bridge rectifier module rated for 800 V off-state voltage with a maximum on-state current of 16 A. Manufactured by IXYS in the V1A-PAK chassis mount package, this thyristor module integrates 2 SCRs and 4 diodes for bridge rectification applications. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

VHFD16-08IO1

IXYSIn Stock: 8935VHFD16-08IO1 Datasheet

Current PartRFQ

VHFD37-08IO1

IXYSIn Stock: 7621VHFD37-08IO1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VHFD16-08IO1 is determined by the following critical parameters:

• Voltage Rating (Off State): Must match or exceed 800 V to maintain system voltage protection
• Package and Mounting: Must use identical V1A-PAK chassis mount configuration for mechanical and thermal compatibility
• Bridge Structure: Must maintain single-phase SCR/diode bridge topology with 2 SCRs and 4 diodes
• Gate Trigger Characteristics: Vgt and Igt parameters must remain within specified limits for gate drive circuit compatibility
• Operating Temperature Range: Must support -40°C to 125°C junction temperature range

The VHFD37-08IO1 qualifies as a direct substitute because it maintains identical voltage rating, package type, bridge structure, gate trigger specifications, and operating temperature range. The higher on-state current rating (36 A vs. 16 A) and increased surge current capacity represent performance enhancements that do not compromise compatibility in applications designed for the VHFD16-08IO1.

Parameter Comparison

Engineering Selection Recommendations

The VHFD37-08IO1 is the appropriate substitute for the obsolete VHFD16-08IO1. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The VHFD37-08IO1 is currently in active production with confirmed inventory availability, whereas the VHFD16-08IO1 is obsolete. The substitute part provides identical electrical interface characteristics and mechanical compatibility while offering increased current handling capacity. Selection of the VHFD37-08IO1 eliminates obsolescence risk and provides performance margin for thermal and surge current management.

Frequently Asked Questions (FAQ)

Q: Can the VHFD37-08IO1 directly replace the VHFD16-08IO1 in existing designs?

A: Yes. Both parts share identical voltage rating (800 V), gate trigger specifications (Vgt 1 V max, Igt 65 mA max), operating temperature range (-40°C to 125°C), and V1A-PAK chassis mount package configuration. The VHFD37-08IO1 is mechanically and electrically compatible.

Q: What is the primary difference between these parts?

A: The VHFD37-08IO1 provides higher on-state current capacity (36 A vs. 16 A) and increased non-repetitive surge current ratings (320 A / 350 A vs. 150 A / 170 A). These differences represent performance enhancements that do not affect compatibility.

Q: Are there any thermal or mounting considerations when substituting?

A: Both parts use identical V1A-PAK chassis mount packaging and support the same operating temperature range. Thermal management requirements remain consistent. Existing mounting hardware and thermal interface materials are compatible.

Q: Why is the VHFD16-08IO1 marked as obsolete?

A: The VHFD16-08IO1 has been discontinued by IXYS. The VHFD37-08IO1 represents the current production equivalent with enhanced specifications.

Q: Are compliance certifications maintained with the substitute part?

A: Yes. The VHFD37-08IO1 maintains ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part.