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Vishay General Semiconductor - Diodes Division SA64CHE3/73
- Part No.:
- SA64CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA64CHE3/73.pdf
- Description:
- TVS DIODE 64VWM 114VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,156
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Product details
Overview
SA64CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage at 4.9 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA64CHE3/73 datasheet, SA64CHE3/73 pinout, SA64CHE3/73 application, or SA64CHE3/73 equivalent, this page delivers verified electrical specs, package details, real-world protection use cases, and validated alternative parts - all grounded in Vishay's official 88378 document and product family data.
Technical Context
The SA64CHE3/73 operates as a bi-directional avalanche diode with symmetrical clamping behavior in both polarities, enabling robust protection against positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, critical for fast transient suppression in automotive and industrial environments.
It complies with AEC-Q101 stress testing for automotive reliability and supports repetitive surge duty cycles up to 0.01 %, with thermal derating defined from TJ = 25 °C to 175 °C. The device exhibits a ±5 % temperature coefficient of VBR and maintains ≤1.0 µA reverse leakage at rated VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 48 V or 60 V nominal systems. |
| VBR (min/max) | 71.1 V / 78.6 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 103 V at 4.9 A (10/1000 µs) - Clamping voltage under standardized surge; limits downstream IC stress to <103 V during ESD or load dump events. |
| PPPM | 500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity when properly routed. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated stand-off; prevents signal distortion or battery drain in always-on sensor interfaces. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables placement near hot components in engine control units or power converters. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per JESD47. |
Pinout & Package
SA64CHE3/73 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy case, matte tin-plated leads solderable per J-STD-002, UL 94 V-0 rated compound, and no polarity marking (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction terminals | No functional distinction between leads; either terminal serves as input/output for transient energy diversion in both directions. |
| Leads (anode & cathode) | PCB mounting and thermal conduction path | Lead length ≥7.6 mm required for 3.0 W steady-state dissipation; thermal resistance θJA ≈ 42 °C/W typical on FR-4 with 1 oz copper. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 µs) | Supports high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V/24 V automotive systems. |
| AEC-Q101 qualification | Validates suitability for under-hood ECUs, ADAS sensors, and body control modules requiring automotive-grade reliability. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage overshoot during clamping - critical for protecting 75 V-rated MOSFETs or CAN transceivers. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualified, JESD201 Class 2 whisker-resistant matte tin plating for extended field life. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus or 12 V supply rails in door module ECUs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed upstream of LDOs and microcontrollers to limit rail excursions to ≤103 V. Use Value: Prevents latch-up or permanent damage to 65 V-rated power management ICs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Fast-response shunt protector on 4–20 mA loop or 0–10 V output lines exposed to field wiring transients. Use Value: Maintains signal integrity by clamping induced spikes within 1 ns while adding <0.5 pF parasitic capacitance. |
| Telecom DC Power Feeds | Consumer USB Port ESD Protection |
Use Scenario: Secondary surge protection on -48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Standoff-clamp TVS in parallel with primary MOV-based protection to handle fast-rising line transients. Use Value: Provides precise 64 V clamping threshold to avoid nuisance tripping while absorbing 500 W surges per IEEE C62.41. |
Use Scenario: Board-level ESD safeguard for USB 2.0 VBUS lines in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) bi-directional suppressor co-located with connector to divert ±8 kV HBM ESD pulses. Use Value: Enables pass/fail compliance with IEC 61000-4-2 Level 4 without degrading 5 V regulation or causing standby current issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/5A (Vishay) | Uni-directional; 64 V VWM, 71.1–78.6 V VBR, same DO-214AC package but surface-mount; lower IPPM (4.9 A vs. SA64CHE3/73's 4.9 A), identical VC. | Requires polarity-aware layout; unsuitable for AC-coupled or floating lines where bi-directional symmetry is mandatory. | Select SMAJ64A-E3/5A only when board space constraints favor SMD and circuit topology guarantees unidirectional bias. |
| P6KE68CA (Littelfuse) | Bi-directional; 68 V VWM, 75.6–83.6 V VBR, DO-204AC package; 600 W PPPM, higher VC (112 V at 5.3 A); RoHS-compliant but not AEC-Q101 qualified. | Lacks automotive qualification; higher clamping voltage increases risk to 75 V-rated downstream devices. | Choose P6KE68CA only for cost-sensitive industrial applications where AEC-Q101 is not required and 112 V clamping is acceptable. |
Compared with SMAJ64A-E3/5A and P6KE68CA, SA64CHE3/73 uniquely combines bi-directional operation, AEC-Q101 qualification, and 103 V clamping in through-hole DO-204AC - making it the preferred choice for automotive and high-reliability replaceable fuse-style TVS placements.
Availability
SA64CHE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SA64CHE3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SAxxCH series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and repeatable clamping are mandatory.
FAQ
What is the polarity configuration of SA64CHE3/73?
The SA64CHE3/73 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode marking and can be installed in either orientation on the PCB - ideal for protecting AC-coupled signals, floating grounds, or bidirectional data lines like CAN or LIN without polarity concerns.
Does SA64CHE3/73 meet automotive qualification standards?
Yes, SA64CHE3/73 carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay Document 88378. It has passed high-temperature operating life, temperature cycling, unbiased HAST, and mechanical shock tests - confirming suitability for engine control, body electronics, and ADAS applications.
What is the maximum clamping voltage of SA64CHE3/73 under surge conditions?
The SA64CHE3/73 clamps to a maximum of 103 V when subjected to a 10/1000 µs waveform with 4.9 A peak pulse current (IPPM), as specified in Vishay's 88378 datasheet. This value is measured at TJ = 25 °C and remains stable across its -55 °C to +175 °C operating range.
How does SA64CHE3/73 differ from SA64A-E3/73?
SA64CHE3/73 is bi-directional (CA suffix), while SA64A-E3/73 is uni-directional (A suffix). Both share identical VWM (64 V), VBR (71.1–78.6 V), and PPPM (500 W), but SA64A-E3/73 has a cathode band and cannot protect negative transients - making SA64CHE3/73 mandatory for AC or floating-line applications.
What package type and lead finish does SA64CHE3/73 use?
SA64CHE3/73 uses the DO-204AC (DO-15) axial-leaded package with matte tin-plated leads compliant with J-STD-002 solderability requirements. The HE3 suffix confirms JESD201 Class 2 whisker resistance, and the molding compound meets UL 94 V-0 flammability rating.
SA64CHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA64CHE3/73 FAQ
1.How can I place an order for SA64CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA64CHE3/73 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 SA64CHE3/73 reliable?
The price and inventory of SA64CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA64CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA64CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA64CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA64CHE3/73?
SA64CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA64CHE3/73 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 SA64CHE3/73?
For technical support, including SA64CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA64CHE3/73 requirements.
6.How does Aetrix verify that SA64CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA64CHE3/73 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 SA64CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA64CHE3/73?
All SA64CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA64CHE3/73, 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 SA64CHE3/73 part is unused and in its original packaging.
Return procedure for SA64CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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