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Vishay General Semiconductor - Diodes Division SA33CHE3/73
- Part No.:
- SA33CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33CHE3/73.pdf
- Description:
- TVS DIODE 33VWM 59VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,708
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Product details
Overview
SA33CHE3/73 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 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 53.3 V maximum clamping voltage at 9.4 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA33CHE3/73 datasheet, SA33CHE3/73 pinout, SA33CHE3/73 application, or SA33CHE3/73 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1.0 μA), and high-temperature operation up to 175 °C are required.
Technical Context
The SA33CHE3/73 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, critical for consistent clamping under repetitive transients.
It delivers 500 W peak pulse power per the 10/1000 μs waveform standard, with thermal derating above 25 °C and full functionality across –55 °C to +175 °C junction temperature range. The device meets JESD22-B106 solderability and JESD201 Class 2 whisker resistance requirements, supporting automated assembly in high-reliability environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on within specified tolerance band. |
| VC @ IPPM | 53.3 V at 9.4 A - Clamped voltage during 10/1000 μs surge; limits stress on downstream ICs to safe levels. |
| PPPM | 500 W - Peak transient energy absorption capability; sustains single or low-duty-cycle surges per JEDEC standards. |
| ID @ VWM | <1.0 μA - Reverse leakage current at rated stand-off; minimizes standby power loss and signal distortion. |
| TJ max. | +175 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial deployment. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads; no polarity marking (bi-directional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | Either lead functions identically; no cathode band - enables placement flexibility in PCB layout. |
| Lead 1 | Terminal 1 | Electrically identical to Lead 2; connects to protected line or ground reference point per circuit topology. |
| Lead 2 | Terminal 2 | Electrically identical to Lead 1; forms complete clamping path across protected node and return path. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved humidity resistance versus non-passivated alternatives. |
| 500 W peak pulse power (10/1000 μs) | Handles common lightning-induced surges and inductive switch-off transients without degradation. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs. |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and automotive material compliance requirements. |
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 ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between signal line and chassis ground to shunt transients before they reach interface ICs. Use Value: Maintains signal integrity during 12 V/24 V system transients while surviving repeated exposure per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to limit voltage excursions during relay switching or cable coupling events. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by clamping to ≤53.3 V during 500 W surges. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding 48 V DC power feeds in PoE-powered network equipment from induced surges on long Ethernet runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC supply rail upstream of DC/DC converters and PHY ICs. Use Value: Limits rail voltage to 53.3 V during 10/1000 μs transients, preserving converter stability and preventing MOSFET gate oxide failure. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-motor terminals to absorb inductive kickback energy during PWM commutation or sudden shutdown. Use Value: Enables reliable operation at 175 °C ambient by sustaining repeated 500 W pulses without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/57T | Same VWM (33 V), same DO-214AC package, but lower PPPM (400 W) and higher VC (59.3 V at 6.9 A). | Less robust clamping margin; suitable only where surge energy is limited to <400 W. | Select SMAJ33CA-E3/57T only if board space requires SMD mounting and 400 W rating suffices. |
| 1.5KE33CA | Higher power (1500 W), larger DO-201AD package, same VWM and bi-directionality, but no AEC-Q101 qualification. | Not qualified for automotive; used in industrial power supplies where footprint and qualification are secondary. | Choose 1.5KE33CA when higher surge immunity is needed and AEC-Q101 is not mandated. |
Compared with SMAJ33CA-E3/57T and 1.5KE33CA, the SA33CHE3/73 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and precise 500 W/53.3 V clamping performance - making it optimal for automotive and high-reliability industrial designs requiring proven qualification and axial-leaded assembly.
Availability
SA33CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SA33CHE3/73 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SAxxCH series targets automotive and industrial transient suppression, engineered to meet AEC-Q101 and deliver consistent clamping performance across extreme temperature and surge conditions.
FAQ
What is the polarity configuration of the SA33CHE3/73?
The SA33CHE3/73 is a bi-directional TVS diode with no polarity marking - both leads are functionally identical. This allows flexible placement across protected nodes without regard to signal direction, simplifying layout for AC-coupled or floating interfaces where transients may occur in either polarity.
Does the SA33CHE3/73 meet automotive qualification standards?
Yes, the SA33CHE3/73 carries the HE3 suffix, indicating AEC-Q101 qualification. It has undergone stress testing including temperature cycling, high-temperature reverse bias, and ESD per JESD22-A114, confirming suitability for under-hood and body-control module applications.
What is the maximum clamping voltage of the SA33CHE3/73 under surge conditions?
The SA33CHE3/73 clamps to a maximum of 53.3 V when subjected to its rated peak pulse current of 9.4 A (10/1000 μs waveform). This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Can the SA33CHE3/73 be used in place of a uni-directional TVS like SA33A?
No - the SA33CHE3/73 is bi-directional and lacks a cathode band, whereas SA33A is uni-directional with defined polarity. Substituting them requires verifying circuit topology: SA33CHE3/73 suits AC or floating lines; SA33A is for DC-biased unidirectional paths where forward conduction must be blocked.
What packaging and plating specifications apply to the SA33CHE3/73?
The SA33CHE3/73 uses DO-204AC (DO-15) axial package with matte tin-plated leads compliant with J-STD-002 and JESD22-B102. The HE3 suffix confirms JESD201 Class 2 whisker resistance and RoHS compliance, supporting lead-free reflow and wave soldering up to 275 °C for 10 seconds.
SA33CHE3/73 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- 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)
SA33CHE3/73 FAQ
1.How can I place an order for SA33CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33CHE3/73 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 SA33CHE3/73 reliable?
The price and inventory of SA33CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA33CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33CHE3/73?
SA33CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33CHE3/73 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 SA33CHE3/73?
For technical support, including SA33CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33CHE3/73 requirements.
6.How does Aetrix verify that SA33CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA33CHE3/73 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 SA33CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA33CHE3/73?
All SA33CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA33CHE3/73, 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 SA33CHE3/73 part is unused and in its original packaging.
Return procedure for SA33CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA33CHE3/73 Tags
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