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onsemi SA64CA
- Part No.:
- SA64CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,105
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Product details
Overview
SA64CA from Fairchild Semiconductor is a 500 W bidirectional transient voltage suppressor (TVS) diode in DO-15 package, with 64 V reverse stand-off voltage (VRWM), 71.1–78.6 V breakdown voltage (VBR), and 103.0 V clamping voltage (VC) at 4.9 A peak pulse current (IPPM) on 10/1000 μs waveform - used for surge protection in AC power inputs, telecom line interfaces, and industrial control I/O.
For engineers reviewing the SA64CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low incremental surge resistance, sub-5 ns response time, IR < 1.0 μA at VRWM, and DO-15 through-hole mounting compatibility with legacy PCB layouts.
Technical Context
The SA64CA employs a glass-passivated junction to ensure stable breakdown characteristics and high reliability under repetitive surge stress. Its bidirectional structure provides symmetrical clamping in both polarities without external polarity orientation constraints.
Designed for 10/1000 μs surge waveforms per R.E.A., it delivers 500 W peak pulse power with 103.0 V clamping at 4.9 A, and operates across -65°C to +175°C junction temperature range - supporting harsh-environment deployments in industrial and telecom infrastructure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPPM) | 500 W on 10/1000 μs waveform - defines maximum single-event surge energy absorption capability |
| Reverse Stand-off Voltage (VRWM) | 64 V - maximum continuous operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 71.1–78.6 V at 1.0 mA - onset voltage where device transitions into avalanche conduction |
| Clamping Voltage (VC) | 103.0 V at IPPM = 4.9 A - maximum voltage seen by protected circuit during rated surge |
| Peak Pulse Current (IPPM) | 4.9 A on 10/1000 μs waveform - peak current the device safely diverts without failure |
| Reverse Leakage (IR) | <1.0 μA at VRWM = 64 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response Time | <5.0 ns - enables effective suppression of fast-rising ESD and lightning-induced transients |
Pinout & Package
DO-15 axial-leaded package with cathode band omitted (bidirectional configuration). Leads are tinned and suitable for wave or hand soldering. Standard 0.375" lead length for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Surge current entry (positive polarity) | One terminal of symmetrical avalanche junction - no fixed polarity; conducts during positive or negative overvoltage |
| Cathode (Lead 2) | Surge current entry (negative polarity) | Second terminal of symmetrical junction - identical conduction behavior as Lead 1 in opposite polarity event |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term stability of VBR and reduces parameter drift under thermal cycling and humidity stress |
| 500 W peak pulse power rating | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source impedance) surge immunity without derating |
| Sub-5 ns response time | Enables clamping before transient energy couples into downstream ICs - critical for protecting RS-485 transceivers and microcontroller GPIOs |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, improving protection margin for 3.3 V or 5 V logic rails |
| Bidirectional symmetry | Eliminates need for polarity-aware board layout - simplifies design and reduces BOM count in AC-coupled or floating systems |
Applications
| AC Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: Protecting 120/240 VAC input stages of industrial power supplies against lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Primary shunt clamping device placed across AC line (L-N) or line-to-ground (L-G/N-G). Use Value: Limits transient voltage to ≤103 V, preventing damage to bridge rectifiers and primary-side controllers while maintaining UL/IEC creepage clearance. |
Use Scenario: Safeguarding T1/E1 interface circuits in base station line cards exposed to induced surges on long outdoor copper runs. IC Role / Device Role / Timing Role: Secondary-level surge protector located after gas discharge tube (GDT) front-end, handling residual energy. Use Value: Clamps fast-rising transients (<5 ns) that bypass slower GDTs, preserving signal integrity for AMI/HDB3 encoded data streams. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
Use Scenario: Protecting 24 VDC digital input channels in programmable logic controllers from inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS placed between field input and optocoupler input stage. Use Value: Withstands repeated 4 kV EFT (IEC 61000-4-4) pulses without degradation, ensuring functional safety compliance (IEC 61508 SIL2). |
Use Scenario: Suppressing load dump and jump-start transients on LIN bus lines and sensor supply rails in vehicle body electronics. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on LIN physical layer, co-located with bus transceiver. Use Value: Maintains LIN signal rise/fall times (≤25 ns) due to minimal parasitic capacitance, avoiding communication errors during ISO 7637-2 Pulse 5a events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA (onsemi) | Same VRWM (64 V), but SMB package (SMT); 600 W PPPM; slightly lower VC (104 V @ 4.8 A) | Requires PCB rework for surface-mount assembly; better thermal performance in high-density layouts | Select when automated SMT production and space-constrained boards outweigh through-hole reliability advantages |
| P6KE68CA (Littelfuse) | Higher VRWM (68 V); same DO-15 package; 600 W PPPM; VC = 112 V @ 4.5 A | Looser clamping margin - may not protect 60 V-rated components; suited for higher-voltage rails | Choose only if system operating voltage exceeds 64 V and clamping margin above 112 V remains acceptable |
Compared with SMBJ64CA and P6KE68CA, the SA64CA offers optimal balance of proven through-hole robustness, precise 64 V standoff, and tight 103 V clamping - making it preferred for field-serviceable industrial equipment and legacy telecom hardware where DO-15 mechanical retention and repeatable hand-soldering are critical.
Availability
SA64CA is available at Aetrix Electronics and suitable for AC power input protection, telecom line interface hardening, and industrial PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for SA64CA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete devices, acquired by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed in industrial and infrastructure systems.
The SA64CA belongs to Fairchild's SAxxCA family of 500 W bidirectional TVS diodes designed specifically for cost-sensitive, high-reliability surge protection in AC mains, telecom, and factory automation applications.
FAQ
What is the clamping voltage of the SA64CA at its rated peak pulse current?
The SA64CA has a maximum clamping voltage (VC) of 103.0 V when subjected to its rated peak pulse current of 4.9 A on a 10/1000 μs waveform. This value is measured per R.E.A. standard and represents the upper voltage limit imposed on the protected circuit during a full-rated surge event. The SA64CA maintains this clamping performance consistently across its specified operating temperature range.
Is the SA64CA unidirectional or bidirectional, and how does that affect PCB layout?
The SA64CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative transients, eliminating the need for polarity-specific orientation on the PCB. Unlike unidirectional variants, the SA64CA has no cathode band marking - simplifying assembly and reducing risk of misplacement during manual or automated insertion.
What is the maximum operating junction temperature for the SA64CA?
The SA64CA has a maximum operating junction temperature (TJ) of +175°C, enabling reliable operation in high-ambient environments such as enclosed industrial enclosures or near power transformers. This rating is supported by its glass-passivated junction and DO-15 package thermal path, and must be verified against actual board-level thermal conditions using the provided steady-state derating curve.
Does the SA64CA meet any specific industry surge immunity standards?
The SA64CA's 500 W peak pulse power rating and 103.0 V clamping voltage align with IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source) requirements when properly implemented with appropriate series impedance. While the device itself is not certified, it is routinely selected in designs targeting compliance with UL 60950-1, EN 61000-4-5, and Telcordia GR-1089-CORE for telecom infrastructure.
How does the SA64CA's leakage current compare to similar 64 V TVS diodes?
The SA64CA specifies reverse leakage current (IR) of less than 1.0 μA at its 64 V VRWM - matching or exceeding the leakage performance of comparable DO-15 bidirectional TVS diodes like P6KE68CA (1.0 μA) and SMBJ64CA (1.0 μA). This low leakage minimizes power loss in always-on monitoring circuits and avoids false triggering in high-impedance sensing nodes.
SA64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
SA64CA FAQ
1.How can I place an order for SA64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA64CA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SA64CA reliable?
The price and inventory of SA64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA64CA is usually 5 days.
3.What payment methods are accepted for SA64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA64CA?
SA64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA64CA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SA64CA?
For technical support, including SA64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA64CA requirements.
6.How does Aetrix verify that SA64CA is sourced from the original manufacturer or authorized distributors?
All SA64CA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SA64CA meets industry standards.
7.What is the process for return or replacement of SA64CA?
All SA64CA units undergo pre-shipment inspection (PSI). If there is an issue with SA64CA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SA64CA part is unused and in its original packaging.
Return procedure for SA64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA64CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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