SA45AHB0G Equivalent & Substitute Parts

Part Overview

The SA45AHB0G 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 45V reverse standoff voltage and 72.7V maximum clamping voltage at peak pulse current. The SA45AHB0G is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain identical electrical and mechanical specifications for seamless integration into existing designs.

Substiute Parts

SA45AHB0G

Taiwan Semiconductor CorporationIn Stock: 743SA45AHB0G Datasheet

Current PartRFQ

SA45AHA0G

Taiwan Semiconductor CorporationIn Stock: 689SA45AHA0G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA45AHB0G is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish the substitution criteria:

Electrical Parameters:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Breakdown (Min): 50V
• Voltage - Clamping (Max) @ Ipp: 72.7V
• Current - Peak Pulse (10/1000µs): 7.2A
• Power - Peak Pulse: 500W

Mechanical & Environmental Parameters:

• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AC (DO-15), Axial
• Operating Temperature Range: -55°C to 175°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

Compliance Parameters:

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

Substitute parts must match all parameters listed above without deviation. The SA45AHB0G belongs to the SA45 base product family, and only parts within this family that maintain identical specifications qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The SA45AHA0G is a direct functional equivalent to the SA45AHB0G. Both components are manufactured by Taiwan Semiconductor Corporation and maintain identical electrical specifications across all critical parameters: 45V reverse standoff voltage, 72.7V clamping voltage, and 7.2A peak pulse current. Both components are automotive-grade with AEC-Q101 qualification and ROHS3 compliance.

The primary distinction between these parts is product status: the SA45AHB0G is discontinued at DiGi Electronics, while the SA45AHA0G maintains active status with confirmed inventory availability (640 pieces in stock). For new designs or component replenishment, the SA45AHA0G is the appropriate selection. Both parts are suitable for through-hole mounting applications requiring transient voltage suppression in automotive circuits operating across the -55°C to 175°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can the SA45AHA0G be used as a direct replacement for the SA45AHB0G in existing circuit designs?

A: Yes. The SA45AHA0G is electrically and mechanically identical to the SA45AHB0G. Both components share the same voltage ratings (45V standoff, 72.7V clamping), current handling (7.2A peak pulse), power dissipation (500W), package type (DO-204AC/DO-15 axial through-hole), and automotive qualification (AEC-Q101). No circuit modifications are required.

Q: What is the difference between the SA45AHB0G and SA45AHA0G part numbers?

A: The part numbers differ only in the suffix designation (AHB0G versus AHA0G). Both parts belong to the SA45 base product family and maintain identical electrical and mechanical specifications. The suffix variation reflects internal manufacturer coding and does not affect functional performance or compatibility.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SA45AHB0G and SA45AHA0G are automotive-grade components with AEC-Q101 qualification. Both operate across the -55°C to 175°C temperature range and comply with ROHS3 environmental standards.

Q: What is the package configuration for these TVS diodes?

A: Both components use the DO-204AC package, also designated as DO-15 or axial configuration. This is a through-hole package suitable for insertion into printed circuit boards with axial lead spacing.

Q: Why is the SA45AHB0G discontinued?

A: The SA45AHB0G is discontinued at DiGi Electronics. The SA45AHA0G remains in active production and is the recommended selection for current procurement.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both components have identical through-hole axial lead configurations and can be mounted in the same PCB footprint without modification. The electrical performance and thermal characteristics are equivalent.

Q: What compliance certifications apply to these parts?

A: Both components are ROHS3 compliant, REACH unaffected, and carry AEC-Q101 automotive qualification. Moisture sensitivity level is 1 (unlimited), indicating no special moisture control requirements during storage or handling.