SA40AHB0G Equivalent & Substitute Parts

Part Overview

The SA40AHB0G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation, designed for through-hole applications in automotive-grade circuits. This component provides transient overvoltage protection with a 40V reverse standoff voltage and 64.5V maximum clamping voltage at peak pulse current of 8.1A. The part is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

SA40AHB0G

Taiwan Semiconductor CorporationIn Stock: 950SA40AHB0G Datasheet

Current PartRFQ

SA40AHA0G

Taiwan Semiconductor CorporationIn Stock: 1104SA40AHA0G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by electrical and mechanical parameter equivalence. The SA40AHB0G can be substituted with parts that maintain identical specifications across the following critical parameters:

• Voltage - Reverse Standoff: 40V (Typ)
• Voltage - Breakdown: 44.4V (Min)
• Voltage - Clamping: 64.5V (Max) @ Ipp
• Current - Peak Pulse: 8.1A (10/1000µs)
• Power - Peak Pulse: 500W
• Operating Temperature Range: -55°C to 175°C (TJ)
• Package / Case: DO-204AC (DO-15), Axial
• Mounting Type: Through Hole
• Grade: Automotive
• Qualification: AEC-Q101

Parts meeting all these parameters are electrically and mechanically interchangeable without circuit redesign or board layout modification.

Parameter Comparison

Engineering Selection Recommendations

The SA40AHA0G is a direct substitute for the SA40AHB0G. Both parts are manufactured by Taiwan Semiconductor Corporation within the SA series and share identical electrical and mechanical specifications. The SA40AHA0G maintains active product status, ensuring continued availability and supply chain support compared to the discontinued SA40AHB0G.

Both parts carry automotive-grade classification with AEC-Q101 qualification, confirming suitability for automotive applications. Compliance certifications including ROHS3 and REACH Unaffected status are equivalent across both parts. The through-hole DO-204AC (DO-15) axial package format is identical, permitting direct board-level substitution without layout modification.

Selection of the SA40AHA0G is supported by its active product status and equivalent compliance profile, making it the appropriate choice for new designs and ongoing production requiring TVS protection at 40V standoff voltage with 8.1A peak pulse current capability.

Frequently Asked Questions (FAQ)

Q: Can the SA40AHA0G be used as a direct replacement for the SA40AHB0G in existing designs?

A: Yes. The SA40AHA0G is electrically and mechanically equivalent to the SA40AHB0G across all specified parameters, including voltage ratings, current ratings, temperature range, and package format. No circuit redesign or board layout modification is required.

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

A: The SA40AHB0G is discontinued at DiGi Electronics, while the SA40AHA0G maintains active product status. All electrical and mechanical specifications are identical.

Q: Are the package dimensions identical between SA40AHB0G and SA40AHA0G?

A: Yes. Both parts use the DO-204AC (DO-15) axial through-hole package format with identical mechanical specifications, enabling direct board-level substitution.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the SA40AHB0G and SA40AHA0G carry automotive-grade classification and AEC-Q101 qualification, confirming compliance with automotive industry standards.

Q: What are the critical voltage parameters for substitution compatibility?

A: Substitution requires matching of three voltage parameters: Reverse Standoff Voltage (40V Typ), Breakdown Voltage (44.4V Min), and Clamping Voltage (64.5V Max @ Ipp). Both parts meet these specifications identically.

Q: Is the peak pulse current rating the same for both parts?

A: Yes. Both parts are rated for 8.1A peak pulse current under 10/1000µs pulse conditions with 500W peak pulse power dissipation.

Q: What is the operating temperature range for these TVS diodes?

A: Both parts operate across the temperature range of -55°C to 175°C (TJ), providing thermal performance suitable for automotive and industrial applications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH Unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited) ratings.