Equivalent & Substitute Parts for 409DMQ135

Part Overview

The 409DMQ135 is a Schottky diode array module manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Series Connection configuration rated for 135 V DC reverse voltage with 400 A average rectified current per diode. The device is housed in a TO-244AB chassis mount package and is classified as obsolete. Due to its obsolete product status, identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for ongoing production and repair applications.

Substiute Parts

409DMQ135

Vishay General Semiconductor - Diodes DivisionIn Stock: 1215409DMQ135 Datasheet

Current PartRFQ

409DMQ135

Vishay General Semiconductor - Diodes DivisionIn Stock: 1215409DMQ135 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 409DMQ135 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Diode Configuration: 1 Pair Series Connection
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 135 V
• Current - Average Rectified (Io) (per Diode): 400 A
• Voltage - Forward (Vf) (Max) @ If: 1.21 V @ 400 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 6 mA @ 135 V
• Operating Temperature - Junction: -55°C ~ 175°C

Mechanical Parameters:

• Mounting Type: Chassis Mount
• Package / Case: TO-244AB

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

A substitute part must match all electrical specifications, mechanical packaging requirements, and compliance certifications to ensure functional and regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 409DMQ135 is classified as an obsolete product. Component selection for replacement applications must prioritize parts that maintain full electrical and mechanical equivalence to ensure circuit performance and reliability.

The substitute part 409DMQ135 provides complete parameter equivalence across all electrical specifications, mechanical packaging, and regulatory compliance requirements. This part is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage and handling.

Selection of equivalent parts should be based on verification of all parameters listed in the Key Parameters table. Compliance certifications and package compatibility are critical factors in ensuring successful integration into existing designs.

Frequently Asked Questions (FAQ)

Q: What makes a part a valid substitute for the 409DMQ135?

A: A valid substitute must match all electrical parameters including the 135 V reverse voltage rating, 400 A average rectified current, 1.21 V forward voltage at 400 A, fast recovery speed characteristics, and reverse leakage current specification. The substitute must also be housed in the TO-244AB package with chassis mount configuration and maintain ROHS3 compliance and REACH unaffected status.

Q: Can parts with different voltage ratings be used as substitutes?

A: No. The 135 V DC reverse voltage rating is a critical electrical parameter. Substitutes must have identical voltage specifications to ensure proper circuit operation and protection against overvoltage conditions.

Q: Are there compatibility concerns with the TO-244AB package?

A: The TO-244AB package is a specific mechanical and thermal interface. Substitutes must use this identical package to ensure proper mounting, thermal dissipation, and electrical connection in chassis mount applications. Package changes require circuit board redesign.

Q: What is the significance of the 400 A current rating?

A: The 400 A average rectified current per diode is the maximum continuous current the device can handle. Substitutes must maintain this rating to ensure the component operates within design specifications and thermal limits in the application circuit.

Q: Does the fast recovery speed specification affect substitution?

A: Yes. The fast recovery speed of ≤ 500ns for currents > 200mA is a critical performance parameter. Substitutes must meet this specification to maintain switching characteristics and minimize reverse recovery losses in the circuit.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials. Substitutes must maintain ROHS3 compliance to meet regulatory and procurement standards.

Q: Is the MSL rating important for component handling?

A: The MSL rating of 1 (Unlimited) indicates this component has no moisture sensitivity constraints. This simplifies storage, handling, and assembly processes compared to components with higher MSL ratings.