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Vishay General Semiconductor - Diodes Division SA22CHE3/73
- Part No.:
- SA22CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22CHE3/73.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,952
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Product details
Overview
SA22CHE3/73 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 a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 14.1 A peak pulse current (IPPM), and clamps to ≤35.5 V at rated IPPM. It is AEC-Q101 qualified and used in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SA22CHE3/73 datasheet, SA22CHE3/73 pinout, SA22CHE3/73 application, or SA22CHE3/73 equivalent, this page delivers verified electrical parameters, mechanical package data, real-world use cases, and validated alternative parts - all aligned with Vishay's official 88378 specification document dated 18-Sep-12.
Technical Context
The SA22CHE3/73 operates as a bi-directional avalanche diode, symmetrically clamping overvoltage events in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced transients.
It complies with AEC-Q101 stress testing for automotive environments and supports continuous operation from –55 °C to +175 °C junction temperature. The device is rated for 500 W peak pulse power (10/1000 µs waveform, 0.01% duty cycle) and dissipates up to 3.0 W under steady-state conditions on an infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected line. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| IPPM | 14.1 A (10/1000 µs) - Peak surge current it safely shunts without failure; determines minimum series impedance needed. |
| VC | ≤35.5 V at IPPM - Clamped voltage seen by downstream circuitry; defines maximum stress on protected IC or MOSFET. |
| PPPM | 500 W - Transient energy-handling capacity; enables robust protection against IEC 61000-4-5 Level 3 surges. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial use. |
| Qualification | AEC-Q101 - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
Pinout & Package
SA22CHE3/73 is housed in a DO-204AC (DO-15) molded epoxy package with matte tin-plated leads. The bi-directional configuration has no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals conduct identically during positive or negative overvoltage events; no cathode band or marking required. |
| Leads (2) | PCB interconnect interface | Matte tin-plated, solderable per J-STD-002/JESD 22-B102; supports wave/solder reflow up to 275 °C for 10 s. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse rating (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 1 kV open-circuit / 0.5 A short-circuit test levels. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping, reducing stress on downstream 3.3 V or 5 V logic components. |
| DO-204AC (DO-15) package | Industry-standard through-hole footprint compatible with legacy designs and automated insertion equipment. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across signal/power lines upstream of interface ICs to limit transient voltage excursion. Use Value: Limits induced transients to ≤35.5 V, preventing latch-up or gate oxide damage in 5 V or 12 V automotive microcontrollers and transceivers. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from field-side surges caused by relay coil de-energization or lightning coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC I/O lines, coordinated with series impedance and filtering to meet IEC 61000-4-4/4-5 requirements. Use Value: Withstands repetitive 500 W pulses without degradation, ensuring multi-year field reliability in factory automation environments. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485/RS-232 transceivers and Ethernet PHYs in base station backhaul units exposed to AC mains coupling and ESD. IC Role / Device Role / Timing Role: First-line transient suppression device on differential signal pairs, placed immediately at connector entry point. Use Value: Fast <1 ns response and symmetrical clamping preserve signal integrity while limiting common-mode voltage to safe levels for isolated interface ICs. | Use Scenario: Protecting microcontroller GPIOs and half-bridge drivers in washing machine or HVAC motor control boards from brush-commutator noise and relay bounce. IC Role / Device Role / Timing Role: Localized TVS across motor driver supply rails and feedback sensing nodes to absorb commutation spikes. Use Value: 175 °C max junction temperature rating allows placement near heat-generating triacs and MOSFETs without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5A | Uni-directional; VWM = 22 V, VBR = 24.4–26.9 V, same PPPM and package, but requires polarity-aware layout. | Not suitable for AC-coupled or floating signal lines where bi-directional clamping is mandatory. | Select only if circuit topology guarantees unidirectional voltage polarity and space constraints favor SMA package. |
| 1.5KE22CA | Same bi-directional function and VWM, but larger DO-201AD package; higher IPPM (17.3 A), same VC (35.5 V). | Better suited for higher-energy surge environments (e.g., outdoor telecom cabinets) where PCB space permits larger footprint. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and DO-201AD mounting is acceptable. |
Compared with SMAJ22A-E3/5A and 1.5KE22CA, SA22CHE3/73 uniquely combines AEC-Q101 qualification, DO-204AC form factor, and bi-directional symmetry - making it optimal for space-constrained, automotive-grade, floating-line protection where polarity independence is critical.
Availability
SA22CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection circuits, and consumer appliance motor control systems requiring stable component supply and long-term lifecycle support.
Supply support for SA22CHE3/73 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxxxA/SAxxxCA series was developed specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the polarity configuration of SA22CHE3/73?
SA22CHE3/73 is a bi-directional TVS diode with symmetrical terminal behavior and no polarity marking. Both leads function identically during positive or negative overvoltage events, eliminating orientation concerns during PCB assembly and simplifying layout for AC-coupled or floating signal paths.
Does SA22CHE3/73 meet automotive qualification standards?
Yes, SA22CHE3/73 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay Document Number 88378. This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD - validating its suitability for under-hood and body-control module applications.
What is the maximum clamping voltage of SA22CHE3/73 at rated surge current?
The maximum clamping voltage (VC) of SA22CHE3/73 is 35.5 V when subjected to its rated 14.1 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry.
Can SA22CHE3/73 replace SA22A in an existing design?
No - SA22A is uni-directional with a cathode band, while SA22CHE3/73 is bi-directional and unmarked. Substituting SA22CHE3/73 for SA22A may cause improper clamping on reverse-polarity transients unless the circuit is confirmed to be polarity-insensitive or fully floating.
What package type does SA22CHE3/73 use, and is it RoHS compliant?
SA22CHE3/73 uses the DO-204AC (DO-15) package with matte tin-plated leads and is RoHS compliant per the "HE3" suffix designation. It meets JESD 201 Class 2 whisker resistance and is rated for soldering at 275 °C for up to 10 seconds per JESD 22-B106.
SA22CHE3/73 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 22.7A
- 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)
SA22CHE3/73 FAQ
1.How can I place an order for SA22CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22CHE3/73 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 SA22CHE3/73 reliable?
The price and inventory of SA22CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA22CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA22CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22CHE3/73?
SA22CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22CHE3/73 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 SA22CHE3/73?
For technical support, including SA22CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22CHE3/73 requirements.
6.How does Aetrix verify that SA22CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA22CHE3/73 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 SA22CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA22CHE3/73?
All SA22CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA22CHE3/73, 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 SA22CHE3/73 part is unused and in its original packaging.
Return procedure for SA22CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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