SA64CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA64CA is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection in through-hole applications. This bidirectional zener TVS diode operates with a 64V reverse standoff voltage and provides 103V maximum clamping voltage at peak pulse current. The component is housed in a DO-204AC (DO-15) axial package and is ROHS3 compliant with unlimited moisture sensitivity rating. Substitute parts are identified to address inventory availability, packaging format preferences, or equivalent performance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SA64CA

Littelfuse Inc.In Stock: 5449SA64CA Datasheet

Current PartRFQ

P6KE75CA

Diotec SemiconductorIn Stock: 100249P6KE75CA Datasheet

MFR RecommendedRFQ

P6KE75CA-TP

Micro Commercial CoIn Stock: 8689P6KE75CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA64CA are qualified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 64V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 103V (exact match required)
• Bidirectional Channels: 1 (single channel)
• Package / Case: DO-204AC or DO-15 (axial through-hole)
• Mounting Type: Through Hole
• Type: Zener TVS Diode
• Applications: General Purpose

The identified substitutes maintain electrical equivalence within the specified voltage and current parameters while preserving the through-hole axial package format. Variations in peak pulse current (5A to 6.1A) and power dissipation (500W to 600W) remain within acceptable operational margins for general-purpose transient protection applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and are suitable for direct substitution in general-purpose transient voltage protection circuits. Selection between substitutes should be based on the following factors:

P6KE75CA (Diotec Semiconductor): Offers increased peak pulse current (6.1A) and power dissipation (600W) compared to the main part. Available in high inventory (100,200 pcs) in Tape & Reel packaging format. RoHS compliance status is not applicable per manufacturer specification.

P6KE75CA-TP (Micro Commercial Co): Maintains identical operating temperature range (-55°C ~ 175°C) as the SA64CA and is ROHS3 compliant. Peak pulse current (5.8A) and power dissipation (600W) provide enhanced margin over the main part specification. Available in Cut Tape packaging (8,590 pcs inventory) matching the SA64CA format preference.

Both substitutes are electrically equivalent within the critical voltage parameters (64V standoff, 103V clamping) and preserve the through-hole DO-15 axial package configuration. Packaging format (Cut Tape vs. Tape & Reel) and compliance certifications should guide final selection based on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can P6KE75CA and P6KE75CA-TP be used interchangeably with SA64CA in the same circuit?

A: Yes. All three parts share identical voltage specifications (64V standoff, 103V clamping) and bidirectional zener TVS diode topology. The through-hole DO-15 axial package is mechanically compatible across all variants. Peak pulse current and power dissipation differences (5A/500W vs. 5.8A-6.1A/600W) represent increased performance margins in the substitutes.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for manual handling and smaller quantity orders. Tape & Reel (TR) packaging supplies components on continuous reels optimized for automated assembly equipment. Both formats contain identical components; packaging selection depends on assembly process and order quantity requirements.

Q: Does the operating temperature range difference between SA64CA (-55°C ~ 175°C) and P6KE75CA (-50°C ~ 175°C) affect substitution?

A: The P6KE75CA has a narrower lower temperature limit (-50°C vs. -55°C). If the application requires operation below -50°C, P6KE75CA is not suitable. For applications within -50°C to 175°C range, P6KE75CA is electrically equivalent. P6KE75CA-TP maintains the full -55°C ~ 175°C range matching SA64CA.

Q: Are there compliance or certification differences between the three parts?

A: SA64CA and P6KE75CA-TP are both ROHS3 compliant. P6KE75CA RoHS status is listed as not applicable per manufacturer specification. For applications requiring ROHS3 compliance certification, SA64CA and P6KE75CA-TP are the appropriate selections.

Q: What determines whether a TVS diode can substitute for SA64CA?

A: Critical substitution parameters are: reverse standoff voltage (64V), clamping voltage (103V), bidirectional single-channel topology, and through-hole DO-15 axial package. Peak pulse current and power dissipation may exceed the main part specification without affecting compatibility. Operating temperature range and compliance certifications should match application requirements.