TLD8S30AH Equivalent & Substitute Parts

Part Overview

The TLD8S30AH is an active Transient Voltage Suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This unidirectional Zener-type TVS device is designed for surface mount applications in the DO-218AB package. The component provides transient voltage suppression with a 30V reverse standoff voltage and 48.4V maximum clamping voltage, supporting peak pulse currents of 136A at 6600W peak pulse power. The device operates across the automotive temperature range of -55°C to 175°C and carries AEC-Q101 qualification for automotive-grade reliability.

Equivalent substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options while maintaining identical electrical performance and mechanical compatibility.

Substiute Parts

TLD8S30AH

Taiwan Semiconductor CorporationIn Stock: 1142TLD8S30AH Datasheet

Current PartRFQ

SM8S30A

Yenyo TechnologyIn Stock: 2810SM8S30A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLD8S30AH are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 30V
• Voltage - Breakdown (Min): 33.3V
• Voltage - Clamping (Max) @ Ipp: 48.4V
• Current - Peak Pulse (10/1000µs): 136A
• Power - Peak Pulse: 6600W
• Unidirectional Channels: 1
• Type: Zener

Mechanical Parameters (Must Match):

• Package / Case: DO-218AB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 175°C

Compliance Parameters (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101

The SM8S30A from Yenyo Technology meets all specified electrical, mechanical, and compliance requirements and is classified as an equivalent substitute part.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TLD8S30AH

The TLD8S30AH is the specified component and remains the primary selection when available. This part carries ROHS3 compliance and is actively manufactured by Taiwan Semiconductor Corporation with 1128 units in current stock.

Equivalent Substitute: SM8S30A

The SM8S30A from Yenyo Technology is a direct electrical and mechanical equivalent. This substitute part satisfies all critical parameters including voltage ratings, current capacity, thermal operating range, automotive grade classification, and AEC-Q101 qualification. The SM8S30A is actively produced with 2725 units in inventory, providing enhanced supply availability.

Both parts are suitable for identical circuit applications without design modification. Selection between the two components may be based on supply chain considerations, lead time requirements, or procurement preferences. Both devices are RoHS compliant and carry MSL 1 moisture sensitivity rating, indicating unlimited shelf life under standard storage conditions.

Frequently Asked Questions (FAQ)

Q: Can SM8S30A be used as a direct replacement for TLD8S30AH in existing designs?

A: Yes. The SM8S30A meets all electrical specifications (30V standoff, 33.3V breakdown minimum, 48.4V clamping maximum, 136A peak pulse current, 6600W peak power), mechanical requirements (DO-218AB surface mount package), and compliance standards (automotive grade, AEC-Q101 qualification) of the TLD8S30AH. No circuit redesign is required.

Q: Are there any differences in RoHS compliance between these parts?

A: Both parts are RoHS compliant. The TLD8S30AH carries ROHS3 certification, while the SM8S30A carries standard RoHS compliance. Both meet environmental regulatory requirements for electronic component manufacturing and use.

Q: What is the significance of the DO-218AB package for these TVS diodes?

A: The DO-218AB is a surface mount package for transient voltage suppressor diodes. Both the TLD8S30AH and SM8S30A use this identical package, ensuring mechanical and electrical compatibility on printed circuit boards without requiring footprint or layout modifications.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the TLD8S30AH and SM8S30A carry MSL 1 (Unlimited) moisture sensitivity level, indicating no moisture-related storage restrictions and unlimited shelf life under standard warehouse conditions.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the TLD8S30AH and SM8S30A carry automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

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

A: Both parts operate across the junction temperature range of -55°C to 175°C, supporting automotive and industrial temperature environments.

Q: Can these parts be used interchangeably in high-reliability applications?

A: Yes. Both parts carry identical electrical specifications, automotive grade classification, and AEC-Q101 qualification. They are suitable for equivalent use in high-reliability circuit protection applications.