ATV50C780JB-HF Equivalent & Substitute Parts

Part Overview

The ATV50C780JB-HF is a Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for surface mount applications in DO-214AB (SMC) packaging. This bidirectional Zener diode provides transient voltage protection with a 78V reverse standoff voltage and 126V maximum clamping voltage. The component is actively produced and maintains automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory availability, supply chain considerations, or design flexibility needs.

Substiute Parts

ATV50C780JB-HF

Comchip TechnologyIn Stock: 1031ATV50C780JB-HF Datasheet

Current PartRFQ

5.0SMDJ78CA

MDE Semiconductor IncIn Stock: 24025.0SMDJ78CA Datasheet

DirectRFQ

5.0SMDJ78CA-T7

Littelfuse Inc.In Stock: 13395.0SMDJ78CA-T7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ATV50C780JB-HF are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff: 78V (identical)
• Voltage - Clamping (Max) @ Ipp: 126V (identical)
• Current - Peak Pulse (10/1000µs): 39.7A (identical)
• Power - Peak Pulse: 5000W (identical)
• Package / Case: DO-214AB, SMC (identical)
• Mounting Type: Surface Mount (identical)
• Bidirectional Channels: 1 (identical)
• Type: Zener (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

All identified substitute parts maintain these core electrical specifications and mechanical compatibility requirements. Variations in operating temperature range and manufacturer-specific applications do not affect substitution eligibility when the primary protection parameters are matched.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ATV50C780JB-HF, 5.0SMDJ78CA, and 5.0SMDJ78CA-T7—are active products with identical core electrical specifications and mechanical compatibility. Selection among these parts may be based on:

• Inventory availability and lead time requirements
• Manufacturer preference or supply chain qualification
• Operating temperature range requirements (5.0SMDJ78CA-T7 supports -65°C minimum versus -55°C for the other two)
• Compliance certifications specific to end-application requirements

The ATV50C780JB-HF carries automotive-grade AEC-Q101 qualification. All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 5.0SMDJ78CA be used as a direct replacement for ATV50C780JB-HF?

A: Yes. Both parts share identical voltage ratings (78V reverse standoff, 126V clamping), current specifications (39.7A peak pulse), power dissipation (5000W), and DO-214AB SMC packaging. Electrical performance and mechanical fit are equivalent.

Q: What is the difference between 5.0SMDJ78CA and 5.0SMDJ78CA-T7?

A: The primary difference is the operating temperature range. The 5.0SMDJ78CA-T7 supports -65°C to 150°C, while 5.0SMDJ78CA supports -55°C to 150°C. All other electrical and mechanical parameters are identical. Selection depends on minimum operating temperature requirements of the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three parts—ATV50C780JB-HF, 5.0SMDJ78CA, and 5.0SMDJ78CA-T7—are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All parts use identical DO-214AB (SMC) surface mount packaging with the same footprint and pin configuration, allowing direct PCB substitution without layout modifications.

Q: Does the ATV50C780JB-HF have automotive qualification?

A: Yes. The ATV50C780JB-HF is qualified to AEC-Q101 automotive standards. The substitute parts 5.0SMDJ78CA and 5.0SMDJ78CA-T7 do not list AEC-Q101 qualification in the provided specifications. Automotive applications requiring AEC-Q101 certification should verify substitute part qualifications with manufacturers.