SRDA05-4.TBT Equivalent & Substitute Parts

Part Overview

The SRDA05-4.TBT is a 4-channel steering TVS diode manufactured by Semtech Corporation in an 8-SO surface mount package. This component provides transient voltage suppression with a 5V reverse standoff voltage and 20V clamping voltage, rated for 25A peak pulse current. The part is classified as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and new design initiatives.

Substiute Parts

SRDA05-4.TBT

Semtech CorporationIn Stock: 24184SRDA05-4.TBT Datasheet

Current PartRFQ

CDNBS08-SRDA05-4

Bourns Inc.In Stock: 22830CDNBS08-SRDA05-4 Datasheet

DirectRFQ

SRDA05-4R2G

onsemiIn Stock: 17156SRDA05-4R2G Datasheet

UpgradeRFQ

SRDA05-4BTG

Littelfuse Inc.In Stock: 16652SRDA05-4BTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by the following critical parameters:

• Reverse standoff voltage matching (5V)
• Breakdown voltage range (6V minimum)
• Package compatibility (8-SOIC form factor)
• Mounting type (Surface Mount)
• Unidirectional channel configuration (4 channels)
• Type classification (Steering, Rail to Rail)
• Regulatory compliance (RoHS3, REACH Unaffected)

The three substitute parts listed below meet these core substitution criteria. Variations in clamping voltage, peak pulse current, and operating temperature represent design trade-offs within the allowed parameter envelope for this product category.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original SRDA05-4.TBT.

CDNBS08-SRDA05-4 (Bourns Inc.) is classified as Active and supports extended operating temperature range (-55°C ~ 150°C). This part provides higher peak pulse current capability (42A) and lower clamping voltage (13.5V), suitable for applications requiring enhanced transient suppression performance.

SRDA05-4R2G (onsemi) is classified as Active with extended operating temperature range (-55°C ~ 150°C). This part delivers reduced peak pulse current (10A) and lower clamping voltage (12V), appropriate for lower-energy transient environments.

SRDA05-4BTG (Littelfuse Inc.) is classified as Active and maintains the original operating temperature range (-40°C ~ 125°C). This part matches the original peak pulse current specification (25A) with marginally higher clamping voltage (21V) and increased peak pulse power (600W).

Frequently Asked Questions (FAQ)

Q: Can SRDA05-4.TBT be directly replaced with any of these substitutes?

A: All three substitute parts share the same reverse standoff voltage (5V), breakdown voltage (6V minimum), package form factor (8-SOIC), and mounting type (Surface Mount). Direct pin-compatible replacement is possible. However, differences in clamping voltage and peak pulse current must be evaluated against circuit requirements.

Q: What is the primary difference between CDNBS08-SRDA05-4 and SRDA05-4R2G?

A: CDNBS08-SRDA05-4 provides higher peak pulse current (42A) with lower clamping voltage (13.5V), while SRDA05-4R2G provides lower peak pulse current (10A) with lower clamping voltage (12V). Both support extended temperature operation to 150°C.

Q: Why does SRDA05-4BTG have higher peak pulse power (600W) compared to the original (500W)?

A: The increased power rating reflects the component's enhanced thermal dissipation capability. This is provided as specified in the manufacturer data and does not affect substitution eligibility.

Q: Are there temperature range considerations for substitution?

A: The original SRDA05-4.TBT operates from -55°C to 125°C. CDNBS08-SRDA05-4 and SRDA05-4R2G extend to 150°C, providing additional margin. SRDA05-4BTG maintains the -40°C to 125°C range. Application temperature requirements should guide selection.

Q: What is the significance of the "Not For New Designs" status?

A: This status indicates the SRDA05-4.TBT is in end-of-life phase. All three substitute parts are classified as Active, making them suitable for new design implementations and ongoing production.

Q: How does capacitance affect substitution?

A: Capacitance values (8pF to 15pF @ 1MHz) fall within acceptable ranges for TVS diode applications. SRDA05-4BTG does not specify capacitance; this does not affect functional substitution eligibility.