SPLV2.8HTG Equivalent & Substitute Parts

Part Overview

The SPLV2.8HTG is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 2.8V reverse standoff voltage with 15V clamping capability and 40A peak pulse current handling. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SPLV2.8HTG

Littelfuse Inc.In Stock: 1273SPLV2.8HTG Datasheet

Current PartRFQ

SLVU2.8HTG

Littelfuse Inc.In Stock: 51054SLVU2.8HTG Datasheet

DirectRFQ

CDSOT23-SLVU2.8

Bourns Inc.In Stock: 1486CDSOT23-SLVU2.8 Datasheet

DirectRFQ

SLVU2.8.TCT

SemtechIn Stock: 49932SLVU2.8.TCT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPLV2.8HTG is determined by the following critical parameters:

Primary Matching Criteria:

• Reverse standoff voltage: 2.8V (Max)
• Breakdown voltage minimum: 3V
• Package type: SOT-23-3 (TO-236-3, SC-59)
• Mounting type: Surface Mount
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

Secondary Compatibility Parameters:

• Voltage clamping capability at Ipp
• Peak pulse current handling (8/20µs)
• Peak pulse power dissipation
• Operating temperature range
• Capacitance characteristics

The substitute parts listed below maintain the primary matching criteria while exhibiting variations in secondary parameters that reflect different manufacturer specifications and product series within the TVS diode category.

Parameter Comparison

Engineering Selection Recommendations

SLVU2.8HTG (Littelfuse Inc.)

This part is the direct active equivalent from the same manufacturer. It maintains identical electrical specifications to the SPLV2.8HTG (15V clamping, 40A peak pulse current, 600W peak power) while offering active product status and extended operating temperature range (-40°C ~ 125°C TJ versus -40°C ~ 85°C TA). ROHS3 compliance and MSL 1 rating are maintained. This substitute is recommended as the primary replacement option due to specification parity and manufacturer continuity.

CDSOT23-SLVU2.8 (Bourns Inc.)

This Bourns TVS diode maintains the 2.8V reverse standoff and 3V breakdown specifications with SOT-23-3 packaging. The clamping voltage is elevated to 21V with reduced peak pulse current of 30A (8/20µs). Extended operating temperature range (-55°C ~ 150°C TJ) and ROHS3 compliance are provided. This substitute is suitable for applications where higher clamping voltage and wider temperature operation are acceptable trade-offs for reduced peak current handling.

SLVU2.8.TCT (Semtech)

This Semtech TVS diode provides the matching 2.8V reverse standoff and 3V breakdown voltage with SOT-23-3 packaging. The clamping voltage is reduced to 12.5V with peak pulse current of 24A (8/20µs) and 400W peak power. Operating temperature range extends to -55°C ~ 125°C TJ. RoHS compliance is maintained. This substitute is applicable for general-purpose and Ethernet protection applications where lower clamping voltage and reduced power dissipation are compatible with circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can SLVU2.8HTG be used as a direct replacement for SPLV2.8HTG?

A: Yes. SLVU2.8HTG maintains identical reverse standoff voltage (2.8V Max), breakdown voltage (3V Min), clamping voltage (15V), peak pulse current (40A at 8/20µs), and peak pulse power (600W). Both are SOT-23-3 surface-mount packages with ROHS3 compliance and MSL 1 rating. The primary difference is product status (Active versus Obsolete) and extended operating temperature range on the SLVU2.8HTG.

Q: What are the key differences between CDSOT23-SLVU2.8 and the main part?

A: CDSOT23-SLVU2.8 shares the 2.8V reverse standoff and 3V breakdown specifications but differs in clamping voltage (21V versus 15V), peak pulse current (30A versus 40A at 8/20µs), and operating temperature range (-55°C ~ 150°C TJ versus -40°C ~ 85°C TA). The SOT-23-3 package and RoHS3 compliance remain consistent.

Q: Is SLVU2.8.TCT suitable for all applications using SPLV2.8HTG?

A: SLVU2.8.TCT maintains the 2.8V reverse standoff and 3V breakdown specifications with SOT-23-3 packaging. However, the reduced clamping voltage (12.5V versus 15V) and lower peak pulse current (24A versus 40A) require circuit-level evaluation. This part is specified for general-purpose and Ethernet applications and may not be suitable for designs requiring the full 40A current handling or 15V clamping of the original part.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. SLVU2.8HTG, CDSOT23-SLVU2.8, and SLVU2.8.TCT are all supplied in Tape & Reel (TR) packaging. The original SPLV2.8HTG was supplied in bulk packaging. Tape & Reel packaging is standard for high-volume surface-mount assembly operations.

Q: Do all substitute parts meet RoHS compliance requirements?

A: SLVU2.8HTG and CDSOT23-SLVU2.8 are ROHS3 Compliant. SLVU2.8.TCT is RoHS Compliant. All three substitute parts meet RoHS environmental compliance standards applicable to their respective manufacturing specifications.

Q: What is the impact of different capacitance values on circuit performance?

A: Capacitance values range from 2pF (SPLV2.8HTG and SLVU2.8HTG) to 5pF (SLVU2.8.TCT) at 1MHz. Lower capacitance is generally preferred for high-frequency signal integrity applications. Circuit-level analysis is required to determine if the capacitance variation of substitute parts affects signal quality or EMI performance in specific applications.