MMO140-08IO7 Equivalent & Substitute Parts

Part Overview

The MMO140-08IO7 is a 1-Phase SCR Controller module manufactured by IXYS, rated for 800V off-state voltage with a maximum RMS current of 90A. This chassis-mount thyristor module contains 2 SCRs and is designed for AC control applications in industrial power electronics. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

MMO140-08IO7

IXYSIn Stock: 895MMO140-08IO7 Datasheet

Current PartRFQ

MMO140-12IO7

IXYSIn Stock: 908MMO140-12IO7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MMO140-12IO7 qualifies as a direct substitute based on the following substitution criteria:

Maintained Parameters (Identical or Compatible):

• Manufacturer: IXYS (same manufacturer ensures design compatibility)
• Structure: 1-Phase Controller - All SCRs (identical topology)
• Number of SCRs: 2 (identical configuration)
• Current - On State (It RMS) (Max): 90A (identical current rating)
• Voltage - Gate Trigger (Vgt) (Max): 1.5V (identical gate trigger voltage)
• Current - Gate Trigger (Igt) (Max): 100mA (identical gate trigger current)
• Operating Temperature Range: -40°C to 150°C (identical thermal range)
• Mounting Type: Chassis Mount (identical mechanical interface)
• Package / Case: Module (identical form factor)
• RoHS Status: ROHS3 Compliant (equivalent compliance)

Upgraded Parameter:

• Voltage - Off State: 1.2kV (upgraded from 800V)

The MMO140-12IO7 operates at a higher off-state voltage rating, making it suitable for applications previously using the MMO140-08IO7 in circuits where the 800V rating was not fully utilized. The higher voltage rating provides additional design margin without compromising current-handling capability or thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MMO140-12IO7 is the appropriate substitute for the obsolete MMO140-08IO7 based on the following engineering criteria:

Product Status Advantage: The MMO140-12IO7 maintains active product status with current manufacturing availability (832 pcs in stock), whereas the MMO140-08IO7 is obsolete. This ensures long-term supply chain reliability and access to technical support.

Compliance Equivalence: Both parts maintain ROHS3 compliance and identical REACH status (REACH Unaffected), ensuring regulatory compatibility in applications subject to environmental restrictions.

Electrical Compatibility: The substitute part preserves all critical electrical parameters including gate trigger characteristics, hold current, and thermal operating range. The elevated off-state voltage rating (1.2kV vs 800V) provides enhanced voltage margin without altering the current-handling or thermal performance profile.

Mechanical Compatibility: Identical chassis-mount configuration and module form factor ensure direct mechanical interchangeability without redesign of mounting interfaces or thermal management systems.

Frequently Asked Questions (FAQ)

Q: Can the MMO140-12IO7 directly replace the MMO140-08IO7 in existing designs?

A: Yes. The MMO140-12IO7 maintains identical current ratings (90A RMS), gate trigger characteristics (1.5V max, 100mA max), and thermal operating range (-40°C to 150°C). The higher off-state voltage rating (1.2kV) is a non-limiting upgrade that provides additional design margin.

Q: What is the primary difference between these two parts?

A: The off-state voltage rating differs: MMO140-08IO7 is rated for 800V, while MMO140-12IO7 is rated for 1.2kV. All other electrical and mechanical parameters remain identical.

Q: Are there any packaging or mounting differences?

A: No. Both parts use identical chassis-mount module packaging and form factor, requiring no changes to mechanical assembly or thermal interface design.

Q: Why is the MMO140-08IO7 listed as obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The MMO140-12IO7 represents the current active equivalent within the IXYS MMO140 series.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the MMO140-08IO7 and MMO140-12IO7 are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: Is the higher voltage rating of the MMO140-12IO7 a concern for 800V applications?

A: No. A higher voltage rating does not negatively impact performance in lower-voltage applications. The substitute part operates safely and reliably in circuits designed for 800V operation.