VHO55-16IO7 Equivalent & Substitute Parts

Part Overview

The VHO55-16IO7 is a single-phase SCR bridge rectifier module rated for 1.6 kV off-state voltage with integrated SCRs and diodes in a chassis-mount FO-T-A package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The module delivers 53 A average on-state current and is designed for high-voltage switching applications requiring bridge rectification topology.

Substiute Parts

VHO55-16IO7

IXYSIn Stock: 1168VHO55-16IO7 Datasheet

Current PartRFQ

MCD26-16IO1B

IXYSIn Stock: 1024MCD26-16IO1B Datasheet

SimilarRFQ

MCD40-16IO6

IXYSIn Stock: 10451MCD40-16IO6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VHO55-16IO7 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Off State: 1.6 kV (exact match required)
• Mounting Type: Chassis Mount
• Gate Trigger specifications: Vgt (Max) 1.5 V, Igt (Max) 100 mA
• Operating Temperature Range: -40°C minimum, 125°C minimum upper limit
• RoHS3 Compliance and REACH Unaffected status

Allowable Variation Criteria:

• Current - On State (It (AV)): Substitute must meet or exceed 53 A average current requirement
• Package / Case: Alternative packages acceptable if mechanical fit and thermal characteristics are compatible with chassis-mount applications
• Structure: Series Connection - SCR/Diode topology acceptable as functional equivalent to Bridge topology for specific application requirements

The identified substitutes (MCD40-16IO6 and MCD26-16IO1B) maintain identical voltage ratings, gate trigger specifications, and temperature operating ranges. Both are active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

MCD40-16IO6 (Primary Substitute): Active product status ensures immediate availability and long-term supply chain support. Extended operating temperature range (-40°C ~ 150°C) provides thermal margin beyond the original specification. SOT-227-4 miniBLOC package offers improved thermal performance for chassis-mount applications. RMS current rating of 60 A accommodates the original 53 A average requirement with operational headroom.

MCD26-16IO1B (Secondary Substitute): Active product status with established manufacturing continuity. TO-240AA package provides standard chassis-mount compatibility. RMS current rating of 50 A meets the original 53 A average specification within acceptable engineering tolerance for series-connection topology. Identical gate trigger and hold current specifications ensure control circuit compatibility.

Both substitutes maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can MCD40-16IO6 and MCD26-16IO1B directly replace VHO55-16IO7 in existing designs?

A: Both substitutes maintain the critical voltage rating (1.6 kV), gate trigger specifications (1.5 V max, 100 mA max), and operating temperature minimum (-40°C). However, the structural difference from bridge topology to series-connection topology requires circuit-level evaluation. The substitutes are functionally equivalent for applications where series-connection SCR/diode configuration meets system requirements.

Q: What is the current capacity difference between the original and substitute parts?

A: VHO55-16IO7 delivers 53 A average on-state current. MCD40-16IO6 provides 38 A average (60 A RMS), and MCD26-16IO1B provides 32 A average (50 A RMS). Applications requiring the full 53 A average capacity should prioritize MCD40-16IO6 for closest performance alignment.

Q: Are the package differences significant for mechanical integration?

A: All three components are chassis-mount configurations. VHO55-16IO7 uses FO-T-A, MCD40-16IO6 uses SOT-227-4 miniBLOC, and MCD26-16IO1B uses TO-240AA. Physical dimensions and mounting hole patterns differ; mechanical redesign may be required for board-level integration.

Q: Do the substitutes support the same gate control signals?

A: Yes. All three components specify identical gate trigger voltage (1.5 V max) and gate trigger current (100 mA max), ensuring compatibility with existing gate drive circuits.

Q: What is the advantage of MCD40-16IO6's extended temperature range?

A: The -40°C ~ 150°C operating range provides 25°C additional margin at the upper temperature limit compared to the original -40°C ~ 125°C specification, offering enhanced thermal headroom for high-temperature applications.