SA30A-B Equivalent & Substitute Parts

Part Overview

The SA30A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 866 pieces available in bulk packaging. Alternative equivalent parts may be required due to inventory constraints, packaging format preferences, or supply chain considerations.

Substiute Parts

SA30A-B

Littelfuse Inc.In Stock: 970SA30A-B Datasheet

Current PartRFQ

SA30A

Taiwan Semiconductor CorporationIn Stock: 45164SA30A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA30A-B is determined by strict alignment of the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 30V
• Voltage - Breakdown (Min): Must be 33.3V
• Mounting Type: Must be Through Hole
• Package / Case: Must be DO-204AC (DO-15)
• Type: Must be Zener
• Unidirectional Channels: Must be 1
• Operating Temperature Range: Must support -55°C ~ 175°C (TJ)
• RoHS Status: Must be ROHS3 Compliant

The SA30A manufactured by Taiwan Semiconductor Corporation meets all substitution criteria. Variations in clamping voltage (64.3V vs. 48.4V) and peak pulse current (10.8A vs. 10.5A) remain within acceptable tolerance ranges for general-purpose TVS applications while maintaining identical standoff and breakdown voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SA30A-B and SA30A are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Packaging requirements: SA30A-B is supplied in bulk format, while SA30A is supplied in Tape & Reel (TR) format
• Inventory availability: SA30A offers significantly higher stock levels (45100 pcs vs. 866 pcs)
• Clamping voltage tolerance: SA30A exhibits higher clamping voltage (64.3V) compared to SA30A-B (48.4V), which may be advantageous in applications requiring additional transient suppression margin
• Peak pulse current: SA30A provides marginally higher peak pulse current capability (10.8A vs. 10.5A)

Both parts maintain identical reverse standoff voltage, breakdown voltage, operating temperature range, and mechanical compatibility through the DO-204AC (DO-15) package.

Frequently Asked Questions (FAQ)

Q: Can SA30A replace SA30A-B in my circuit?

A: Yes. Both parts share identical reverse standoff voltage (30V), breakdown voltage (33.3V), operating temperature range (-55°C ~ 175°C), and package format (DO-204AC/DO-15). The SA30A provides equivalent or superior electrical performance with higher clamping voltage and peak pulse current ratings.

Q: What is the difference in clamping voltage between these parts?

A: SA30A-B clamps at 48.4V maximum, while SA30A clamps at 64.3V maximum. Both operate within the same standoff and breakdown voltage specifications. The higher clamping voltage of SA30A provides additional transient suppression margin.

Q: Are there packaging differences?

A: Yes. SA30A-B is supplied in bulk packaging, while SA30A is supplied in Tape & Reel (TR) format. Both use identical through-hole DO-204AC (DO-15) mechanical packages suitable for PCB assembly.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SA30A-B and SA30A are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code 8541.10.0080.

Q: Which part should I select for new designs?

A: For new designs, SA30A is recommended due to superior inventory availability (45100 pcs), higher peak pulse current capability (10.8A), and increased clamping voltage margin (64.3V). Both parts maintain identical functional specifications for reverse standoff and breakdown voltages.