SA30A-T Equivalent & Substitute Parts

Part Overview

The SA30A-T is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Diodes Incorporated, rated for 30V reverse standoff voltage with a 48.4V maximum clamping voltage at peak pulse current. This component is designed for general-purpose transient voltage suppression in through-hole applications using the DO-15 package format. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

SA30A-T

Diodes IncorporatedIn Stock: 838SA30A-T Datasheet

Current PartRFQ

P5KE30A-AP

Micro Commercial CoIn Stock: 841P5KE30A-AP Datasheet

MFR RecommendedRFQ

P5KE30A-BP

Micro Commercial CoIn Stock: 950P5KE30A-BP Datasheet

MFR RecommendedRFQ

P5KE30A-TP

Micro Commercial CoIn Stock: 834P5KE30A-TP Datasheet

MFR RecommendedRFQ

SA30A

Taiwan Semiconductor CorporationIn Stock: 45164SA30A Datasheet

MFR RecommendedRFQ

SA30A-AP

Micro Commercial CoIn Stock: 1135SA30A-AP Datasheet

MFR RecommendedRFQ

SA30A-B

Littelfuse Inc.In Stock: 970SA30A-B Datasheet

MFR RecommendedRFQ

SA30A-BP

Micro Commercial CoIn Stock: 951SA30A-BP Datasheet

MFR RecommendedRFQ

SA30A-TP

Micro Commercial CoIn Stock: 894SA30A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA30A-T is determined by matching the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff: 30V (nominal)
• Voltage - Breakdown (Min): 33.3V
• Voltage - Clamping (Max) @ Ipp: 48.4V
• Current - Peak Pulse (10/1000µs): 10.3A minimum
• Power - Peak Pulse: 500W
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC (DO-15)
• Type: Zener, Unidirectional (1 channel)

All substitute parts listed maintain these core electrical specifications within acceptable engineering tolerances. Variations in peak pulse current (10.3A to 10.8A) and clamping voltage (48.4V to 64.3V) represent acceptable performance ranges for general-purpose TVS applications. Operating temperature ranges may vary between -55°C and -65°C minimum, with all parts supporting the 175°C maximum junction temperature requirement.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, providing long-term availability compared to the obsolete SA30A-T. Selection among substitutes should prioritize the following factors:

RoHS3 Compliance: SA30A (Taiwan Semiconductor Corporation), SA30A-B (Littelfuse Inc.), and SA30A-TP (Micro Commercial Co) carry explicit ROHS3 Compliant certification, matching the original part's compliance status. These are preferred for applications requiring regulatory compliance documentation.

Operating Temperature Range: The original SA30A-T supports -65°C minimum junction temperature. P5KE30A series parts (P5KE30A-AP, P5KE30A-BP, P5KE30A-TP) maintain this extended temperature range. Alternative parts from Taiwan Semiconductor Corporation and Micro Commercial Co support -55°C minimum, which is acceptable for most general-purpose applications but represents a narrower operating window.

Electrical Performance: All substitutes maintain the 30V reverse standoff voltage and 500W peak pulse power rating. Clamping voltage variations (48.4V to 64.3V) and peak pulse current variations (10.3A to 10.8A) remain within acceptable ranges for transient suppression in general-purpose circuits.

Packaging and Availability: All substitutes use through-hole mounting in DO-15 or DO-204AC (DO-15) packages, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can I use SA30A-TP as a direct replacement for SA30A-T?

A: Yes. SA30A-TP matches the critical electrical parameters (30V standoff, 48.4V clamping, 10.5A peak pulse current) and maintains ROHS3 compliance. The operating temperature range is -55°C to 175°C versus the original -65°C to 175°C, which is acceptable for general-purpose applications. Both use DO-15 through-hole packaging.

Q: What is the difference between P5KE30A-AP, P5KE30A-BP, and P5KE30A-TP?

A: These three parts are electrically identical, all manufactured by Micro Commercial Co with matching 30V standoff voltage, 48.4V clamping voltage, and 10.3A peak pulse current. The suffix indicates packaging format: -AP (Bulk), -BP (Bulk), and -TP (Cut Tape). Selection depends on procurement and assembly requirements rather than electrical performance.

Q: Why does SA30A show 64.3V clamping voltage instead of 48.4V?

A: SA30A from Taiwan Semiconductor Corporation exhibits higher clamping voltage (64.3V) and slightly higher peak pulse current (10.8A) while maintaining the same 30V reverse standoff specification. This represents a different manufacturing variant within the SA30 base product family. Both are acceptable substitutes as the higher clamping voltage provides additional transient suppression margin.

Q: Are all substitute parts ROHS3 compliant?

A: No. Only SA30A (Taiwan Semiconductor Corporation), SA30A-B (Littelfuse Inc.), and SA30A-TP (Micro Commercial Co) carry explicit ROHS3 Compliant certification. P5KE30A series parts and SA30A-AP do not specify RoHS status. For applications requiring regulatory compliance documentation, select from the ROHS3-certified options.

Q: Can I use these parts interchangeably in my circuit?

A: Yes, within the constraints of your operating temperature requirements. All substitutes maintain the core electrical specifications (30V standoff, 48.4V to 64.3V clamping, 10.3A to 10.8A peak pulse current, 500W peak power) and through-hole DO-15 packaging. If your application requires operation below -55°C, select P5KE30A series parts which support -65°C minimum temperature.