SA30C Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SA30C is a 30V Zener TVS diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage suppression applications. This through-hole component features a 50.82V maximum clamping voltage and 10.5A peak pulse current capability in a DO-204AC (DO-15) axial package. The SA30C is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for circuit protection applications.

Substiute Parts

SA30C

Littelfuse Inc.In Stock: 1008SA30C Datasheet

Current PartRFQ

SA30CA

Taiwan Semiconductor CorporationIn Stock: 1763SA30CA Datasheet

DirectRFQ

SA30CA-AP

Micro Commercial CoIn Stock: 871SA30CA-AP Datasheet

MFR RecommendedRFQ

SA30CA-BP

Micro Commercial CoIn Stock: 982SA30CA-BP Datasheet

MFR RecommendedRFQ

SA30CA-TP

Micro Commercial CoIn Stock: 8740SA30CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA30C is determined by the following critical parameters:

• Reverse Standoff Voltage (30V): All substitute parts must maintain the 30V standoff specification to ensure proper circuit protection threshold.
• Package / Case (DO-204AC, DO-15): Physical and electrical compatibility requires identical through-hole axial packaging.
• Bidirectional Channels (1): Single-channel configuration must be preserved.
• Peak Pulse Current (10.5A minimum): Substitute parts must support at least 10.5A peak pulse current.
• Power Rating (500W): Peak pulse power dissipation capability must meet or exceed 500W.
• Operating Temperature Range (-55°C ~ 175°C): Thermal operating limits must encompass or match the original specification.

The identified substitute parts—SA30CA, SA30CA-AP, SA30CA-BP, and SA30CA-TP—all satisfy these core electrical and mechanical requirements while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts—SA30CA, SA30CA-AP, SA30CA-BP, and SA30CA-TP—are classified as active products and provide direct electrical and mechanical compatibility with the obsolete SA30C. Selection among these alternatives should be based on the following criteria:

SA30CA (Taiwan Semiconductor Corporation): Active status with ROHS3 compliance. Offers the highest peak pulse current (10.8A) and is supplied in Tape & Reel format, suitable for automated assembly processes.

SA30CA-TP (Micro Commercial Co): Active status with ROHS3 compliance and the highest inventory availability (8682 Pcs). Supplied in Cut Tape format, providing flexibility for both manual and semi-automated assembly. Clamping voltage of 48.4V is lower than the original SA30C specification.

SA30CA-AP and SA30CA-BP (Micro Commercial Co): Both active products supplied in Bulk packaging. Identical electrical specifications with 48.4V clamping voltage and 10.5A peak pulse current. Suitable for applications where packaging format is not a constraint.

All substitute parts maintain the 30V reverse standoff voltage, 500W peak pulse power rating, and -55°C to 175°C operating temperature range required for direct replacement in general-purpose transient voltage suppression circuits.

Frequently Asked Questions (FAQ)

Q: Can SA30CA, SA30CA-AP, SA30CA-BP, and SA30CA-TP be used interchangeably with SA30C?

A: Yes. All four substitute parts maintain the critical electrical parameters: 30V reverse standoff voltage, 10.5A or higher peak pulse current, 500W peak pulse power, and identical DO-15 through-hole axial packaging. They are functionally equivalent for general-purpose TVS applications.

Q: What is the difference between the clamping voltages of SA30C (50.82V) and the substitute parts (48.4V to 64.3V)?

A: The clamping voltage represents the maximum voltage across the diode during a transient event at peak pulse current. SA30CA offers 64.3V clamping, while SA30CA-AP, SA30CA-BP, and SA30CA-TP offer 48.4V clamping. Both ranges are within acceptable limits for 30V standoff applications. Circuit designers should verify that the clamping voltage is appropriate for downstream component voltage ratings.

Q: What packaging formats are available for the substitute parts?

A: SA30CA is supplied in Tape & Reel (TR) format for automated assembly. SA30CA-TP is supplied in Cut Tape (CT) format for semi-automated or manual assembly. SA30CA-AP and SA30CA-BP are supplied in Bulk format. Selection depends on assembly process requirements and volume.

Q: Are all substitute parts RoHS3 compliant?

A: SA30CA and SA30CA-TP are explicitly RoHS3 compliant. SA30CA-AP and SA30CA-BP do not specify RoHS status in the provided data. Verify RoHS compliance requirements with the supplier if regulatory compliance is mandatory.

Q: Which substitute part offers the best availability?

A: SA30CA-TP offers the highest inventory availability at 8682 Pcs, followed by SA30CA at 1680 Pcs. SA30CA-BP and SA30CA-AP offer 904 Pcs and 844 Pcs respectively.

Q: Can I mix substitute parts from different manufacturers in the same circuit board assembly?

A: Yes. All substitute parts meet the same electrical and mechanical specifications for the 30V standoff, 10.5A peak pulse current, and DO-15 package. However, maintaining consistency with a single part number per design is recommended for supply chain management and traceability.