SRV08-4.TCT Equivalent & Substitute Parts

Part Overview

The SRV08-4.TCT is a Transient Voltage Suppressor (TVS) diode manufactured by Semtech, designed for rail-to-rail steering protection in surface mount applications. This component features a 5V reverse standoff voltage, 17.5V maximum clamping voltage, and 5A peak pulse current capability in a compact SOT-23-6 package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

SRV08-4.TCT

SemtechIn Stock: 26458SRV08-4.TCT Datasheet

Current PartRFQ

PRTR5V0U4D,125

Nexperia USA Inc.In Stock: 2195PRTR5V0U4D,125 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SRV08-4.TCT is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff: 5V maximum
• Voltage - Breakdown (Min): 6V
• Unidirectional Channels: 4-channel steering configuration
• Type: Rail-to-rail steering protection
• Power Line Protection capability

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package compatibility or functional equivalence in alternative surface mount packages
• MSL Rating: 1 (Unlimited) preferred for manufacturing flexibility

Regulatory & Compliance Criteria:

• RoHS compliance status
• Operating temperature range support for target application

The PRTR5V0U4D,125 from Nexperia USA Inc. qualifies as a substitute based on matching the core electrical protection parameters (5V standoff, 6V breakdown minimum, 4-channel steering, rail-to-rail configuration, power line protection) and surface mount deployment. While packaged in 6-TSOP (SC-74, SOT-457) rather than SOT-23-6, both are industry-standard surface mount packages suitable for automated assembly. The substitute maintains RoHS3 compliance and extends the operating temperature range to -55°C to 150°C (TA), providing enhanced thermal performance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PRTR5V0U4D,125

The PRTR5V0U4D,125 is the recommended substitute for the obsolete SRV08-4.TCT. Selection rationale is based on the following factors:

Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability compared to the obsolete main part.

Electrical Equivalence: Both devices share identical core protection parameters—4-channel steering configuration, 5V reverse standoff voltage, 6V minimum breakdown voltage, and power line protection capability. These parameters define the functional protection envelope required for rail-to-rail transient suppression.

Compliance & Certification: The substitute maintains RoHS3 compliance and carries AEC-Q101 automotive qualification, meeting or exceeding the regulatory requirements of the main part. The extended operating temperature range (-55°C to 150°C TA) provides additional thermal margin for demanding applications.

Package Consideration: The transition from SOT-23-6 to 6-TSOP (SC-74, SOT-457) requires PCB layout modification. Both packages are industry-standard surface mount formats with established assembly processes. Pin-to-pin functional mapping must be verified against application schematics prior to implementation.

Capacitance Difference: The substitute exhibits lower capacitance (1pF vs. 3pF @ 1MHz), which may benefit high-frequency signal integrity in sensitive applications but requires verification against circuit performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the PRTR5V0U4D,125 be used as a direct pin-for-pin replacement for the SRV08-4.TCT?

A: No. While both devices are 4-channel steering TVS diodes with equivalent electrical protection parameters, they use different package formats (SOT-23-6 vs. 6-TSOP). PCB layout and schematic modifications are required. Pin assignments must be verified against the respective datasheets before implementation.

Q: What is the primary reason for substitution?

A: The SRV08-4.TCT is classified as obsolete. The PRTR5V0U4D,125 provides equivalent electrical protection functionality while maintaining active production status and long-term availability.

Q: Are there electrical performance differences between these devices?

A: Both devices meet the core protection requirements with matching reverse standoff voltage (5V), breakdown voltage (6V minimum), and 4-channel steering configuration. The substitute exhibits lower capacitance (1pF vs. 3pF @ 1MHz) and an extended operating temperature range (-55°C to 150°C vs. -55°C to 125°C). Clamping voltage and peak pulse current specifications are not provided for the substitute in the available data.

Q: Does the substitute meet automotive qualification requirements?

A: Yes. The PRTR5V0U4D,125 carries AEC-Q101 qualification and is designated as automotive grade, exceeding the qualification status of the main part.

Q: What is the impact of the package change from SOT-23-6 to 6-TSOP?

A: Both packages are surface mount formats suitable for automated assembly. The 6-TSOP package has different physical dimensions and pin spacing. PCB footprint redesign is necessary. Verify pin-to-pin functional mapping and thermal performance requirements for your specific application.

Q: Is the substitute RoHS compliant?

A: Yes. The PRTR5V0U4D,125 is ROHS3 compliant, meeting current regulatory requirements. The main part is RoHS compliant. Both devices carry MSL 1 (Unlimited) moisture sensitivity ratings.