VHO55-08IO7 Equivalent & Substitute Parts

Part Overview

The VHO55-08IO7 is an SCR Module thyristor bridge rated for 800 V off-state voltage with single-phase bridge configuration containing 2 SCRs and 2 diodes. Manufactured by IXYS, this component is designed for chassis mount applications in FO-T-A package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent performance is required.

Substiute Parts

VHO55-08IO7

IXYSIn Stock: 818VHO55-08IO7 Datasheet

Current PartRFQ

MCD26-08IO1B

IXYSIn Stock: 915MCD26-08IO1B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VHO55-08IO7 is determined by the following critical electrical and mechanical parameters:

• Voltage - Off State: 800 V minimum requirement
• Gate trigger characteristics: Vgt (Max) 1.5 V and Igt (Max) 100 mA
• Operating temperature range: -40°C ~ 125°C (TJ)
• Mounting configuration: Chassis Mount
• RoHS3 compliance and REACH unaffected status

The MCD26-08IO1B qualifies as a substitute based on matching voltage rating, gate trigger specifications, temperature range, mounting type, and regulatory compliance. However, structural differences exist: the MCD26-08IO1B uses series connection configuration (1 SCR, 1 Diode) versus the bridge configuration (2 SCRs, 2 Diodes) of the VHO55-08IO7. Current ratings differ, with the MCD26-08IO1B rated at 32 A average and 50 A RMS on-state current compared to 53 A for the VHO55-08IO7.

Parameter Comparison

Engineering Selection Recommendations

The MCD26-08IO1B is an active product from IXYS with current manufacturing support, whereas the VHO55-08IO7 is obsolete. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system replacements.

Selection of the MCD26-08IO1B requires circuit-level evaluation due to structural differences. The substitute operates with series connection topology (1 SCR, 1 Diode) rather than bridge configuration, and delivers lower average on-state current (32 A versus 53 A). These differences necessitate application-specific assessment to confirm functional equivalence within the target system.

Frequently Asked Questions (FAQ)

Q: Can MCD26-08IO1B directly replace VHO55-08IO7 in existing designs?

A: Direct replacement requires circuit topology compatibility verification. The MCD26-08IO1B uses series connection configuration versus the bridge configuration of VHO55-08IO7. Current ratings differ (32 A average for MCD26-08IO1B versus 53 A for VHO55-08IO7). Application-specific validation is necessary.

Q: What are the key electrical parameters that must match for substitution?

A: Critical matching parameters are: 800 V off-state voltage, 1.5 V maximum gate trigger voltage, 100 mA maximum gate trigger current, -40°C to 125°C operating temperature range, and 200 mA maximum hold current. Both components meet these specifications.

Q: Are there package compatibility considerations?

A: Yes. The VHO55-08IO7 uses FO-T-A package while the MCD26-08IO1B uses TO-240AA package. Physical dimensions and mounting interfaces differ, requiring mechanical redesign or adapter solutions for board-level integration.

Q: Do both components meet current regulatory requirements?

A: Both the VHO55-08IO7 and MCD26-08IO1B are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and use.

Q: What is the availability status of these components?

A: The VHO55-08IO7 is obsolete with 751 pieces in current inventory. The MCD26-08IO1B is an active product with 858 pieces in current inventory, providing ongoing supply assurance for new applications.