SA30CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA30CA is a 30V Zener transient voltage suppressor diode in DO-15 axial package configuration, designed for general-purpose overvoltage protection applications. Manufactured by onsemi, this component features a 48.4V maximum clamping voltage and 10.3A peak pulse current capability with 500W peak pulse power dissipation. The SA30CA is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

SA30CA

onsemiIn Stock: 1779SA30CA Datasheet

Current PartRFQ

P6KE36CA

Taiwan Semiconductor CorporationIn Stock: 25322P6KE36CA Datasheet

DirectRFQ

SA30CA

Taiwan Semiconductor CorporationIn Stock: 1763SA30CA Datasheet

DirectRFQ

P5KE30CA-AP

Micro Commercial CoIn Stock: 1162P5KE30CA-AP Datasheet

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P5KE30CA-BP

Micro Commercial CoIn Stock: 1055P5KE30CA-BP Datasheet

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P5KE30CA-TP

Micro Commercial CoIn Stock: 1089P5KE30CA-TP Datasheet

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SA30CA-AP

Micro Commercial CoIn Stock: 871SA30CA-AP Datasheet

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SA30CA-BP

Micro Commercial CoIn Stock: 982SA30CA-BP Datasheet

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SA30CA-TP

Micro Commercial CoIn Stock: 8740SA30CA-TP Datasheet

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SLD30-018

Littelfuse Inc.In Stock: 3282SLD30-018 Datasheet

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SLD30-018-B

Littelfuse Inc.In Stock: 1132SLD30-018-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA30CA are classified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 30V ±tolerance
• Voltage - Breakdown (Min): 33.3V minimum
• Voltage - Clamping (Max) @ Ipp: 48.4V to 49.9V range
• Current - Peak Pulse (10/1000µs): 10.3A to 12A range
• Power - Peak Pulse: 500W to 600W
• Type: Zener diode, single bidirectional channel
• Mounting Type: Through Hole
• Package: DO-15 or DO-204AC axial configuration

Grouping Categories:

Group 1 - Direct Electrical Equivalents (DO-15 Package): Parts with identical or near-identical electrical specifications and DO-15 package compatibility. These include P5KE30CA variants (AP, BP, TP) and SA30CA variants (AP, BP, TP) from Micro Commercial Co, maintaining 30V standoff voltage, 48.4V clamping voltage, and 10.3-10.5A peak pulse current.

Group 2 - Enhanced Performance Substitute (DO-15 Package): P6KE36CA from Taiwan Semiconductor Corporation provides slightly elevated specifications (30.8V standoff, 49.9V clamping, 12A peak pulse, 600W power) while maintaining DO-15 package compatibility and general-purpose application suitability.

Group 3 - High-Power Alternative (P600 Package): SLD30-018 and SLD30-018-B from Littelfuse Inc. maintain identical voltage specifications (30V standoff, 48.4V clamping) but feature significantly higher current handling (105.4A peak pulse) and power dissipation (5000W) in P600 package configuration. These are suitable only for applications requiring higher transient current capacity and are AEC-Q101 automotive qualified.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (DO-15 Package Continuity):

The P5KE30CA series (AP, BP, TP variants) from Micro Commercial Co and SA30CA variants (AP, BP, TP) from Micro Commercial Co provide direct electrical and mechanical substitution for the obsolete onsemi SA30CA. All maintain identical 30V standoff voltage, 33.3V minimum breakdown voltage, 48.4V clamping voltage, and 500W peak pulse power specifications. These components are active products with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The SA30CA-TP variant offers the highest inventory availability (8,682 units) in Cut Tape packaging.

For Enhanced Performance (DO-15 Package with Improved Specifications):

The P6KE36CA from Taiwan Semiconductor Corporation provides a higher-performance alternative while maintaining DO-15 package compatibility. This component features marginally elevated standoff voltage (30.8V), breakdown voltage (34.2V), and clamping voltage (49.9V), with increased peak pulse current (12A) and power dissipation (600W). This substitute is suitable for applications where slightly higher transient protection margins are beneficial. The component is RoHS3 compliant and carries active product status with 25,300 units in inventory.

For High-Power Applications (P600 Package):

The SLD30-018 and SLD30-018-B from Littelfuse Inc. maintain identical voltage specifications (30V standoff, 48.4V clamping) but provide substantially higher current handling (105.4A peak pulse) and power dissipation (5000W). These components are packaged in P600 configuration and carry AEC-Q101 automotive qualification. Selection of these parts requires mechanical redesign to accommodate the P600 package footprint and is appropriate only for applications requiring high transient current capacity.

Compliance and Certification:

All recommended substitutes carry RoHS3 compliance and REACH unaffected status. The Littelfuse SLD30-018 series additionally carries AEC-Q101 automotive qualification. All components are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can P5KE30CA variants be used as direct replacements for the obsolete SA30CA?

A: Yes. The P5KE30CA-AP, P5KE30CA-BP, and P5KE30CA-TP variants from Micro Commercial Co maintain identical electrical specifications (30V standoff, 48.4V clamping, 10.3A peak pulse, 500W power) and DO-15 package configuration. These are active products suitable for direct substitution in existing circuit designs.

Q: What is the difference between SA30CA-AP, SA30CA-BP, and SA30CA-TP variants?

A: These variants from Micro Commercial Co differ only in packaging format: AP denotes Bulk packaging, BP denotes Bulk packaging, and TP denotes Cut Tape packaging. All three maintain identical electrical specifications and DO-15 package configuration. Selection depends on procurement and assembly requirements.

Q: Is the P6KE36CA a suitable substitute for the SA30CA?

A: The P6KE36CA provides enhanced electrical performance with marginally higher standoff voltage (30.8V vs. 30V), clamping voltage (49.9V vs. 48.4V), peak pulse current (12A vs. 10.3A), and power dissipation (600W vs. 500W). It maintains DO-15 package compatibility and is suitable for applications where improved transient protection margins are required. Verification of circuit tolerance to these parameter variations is necessary.

Q: Can the SLD30-018 series replace the SA30CA in existing designs?

A: The SLD30-018 and SLD30-018-B maintain identical voltage specifications but feature significantly different package configuration (P600 vs. DO-15) and substantially higher current handling (105.4A vs. 10.3A). These components require mechanical redesign of the circuit board layout and are suitable only for applications requiring high transient current capacity. Direct substitution without redesign is not possible.

Q: What is the difference between the Taiwan Semiconductor SA30CA (DO-204AC package) and the onsemi SA30CA (DO-15 package)?

A: Both components share the same part number but differ in package configuration and clamping voltage specification. The Taiwan Semiconductor version uses DO-204AC package with 64.3V clamping voltage, while the onsemi version uses DO-15 package with 48.4V clamping voltage. These are not interchangeable without circuit verification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry RoHS3 compliance status. The Littelfuse SLD30-018 series additionally carries AEC-Q101 automotive qualification.

Q: What inventory availability should be considered for procurement?

A: Current inventory levels vary: SA30CA-TP (8,682 units), P6KE36CA (25,300 units), SLD30-018 (3,234 units), P5KE30CA variants (995-1,076 units), and SA30CA variants (844-904 units). Selection should account for production volume requirements and lead time considerations.