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Vishay General Semiconductor - Diodes Division SA33HE3/54
- Part No.:
- SA33HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33HE3/54.pdf
- Description:
- TVS DIODE 33VWM 59VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,177
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Product details
Overview
SA33HE3/54 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, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA33HE3/54 datasheet, SA33HE3/54 pinout, SA33HE3/54 application, or SA33HE3/54 equivalent, this part serves as a robust, RoHS-compliant, bi-directional surge protection device for automotive sensor interfaces, industrial I/O lines, and telecom line-card circuits where low-leakage, fast-response transient suppression is required.
Technical Context
The SA33HE3/54 operates as a bi-directional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 μs pulses at 0.01 % duty cycle.
With a maximum reverse leakage of 1.0 μA at 33 V and operating junction temperature range of −55 °C to +175 °C, it supports high-reliability deployment in under-hood automotive environments and industrial control cabinets. Its 275 °C solder dip rating (10 s) and JESD 201 Class 2 whisker resistance confirm suitability for automated assembly and long-term field operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Tight 5 % tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 53.3 V at 9.4 A - Clamping voltage during 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 500 W - Peak pulse power handling capability with standard 10/1000 μs waveform; meets IEC 61000-4-5 Level 3. |
| ID @ VWM | 1.0 μA - Ultra-low reverse leakage preserves signal integrity in high-impedance sensor or data lines. |
| TJ max. | +175 °C - Enables placement near heat sources (e.g., power modules) without derating concerns. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor protection. |
Pinout & Package
Package: DO-204AC (DO-15), axial-lead, molded epoxy case meeting UL 94 V-0. Bi-directional construction means no polarity marking; both leads are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either lead conducts during positive or negative overvoltage events; no orientation required during PCB placement. |
| Lead 1 / Lead 2 | Connection interface | Matte tin-plated, solderable per J-STD-002/JESD 22-B102; supports wave and reflow assembly with 275 °C tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Protects AC-coupled or differential signal paths (e.g., CAN, RS-485) without polarity constraints. |
| 500 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to ±1 kV open-circuit / ±500 A short-circuit. |
| Glass passivated junction | Ensures stable VBR drift <0.05 %/°C and long-term parameter consistency in humid or thermally cycled environments. |
| AEC-Q101 qualification | Validated for automotive use via stress tests including HTOL, TC, UHAST, and ESD-HBM ≥8 kV. |
| RoHS & halogen-free | Complies with JEDEC JS709A and EU Directive 2011/65/EU; suitable for green manufacturing and export compliance. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog outputs and LIN bus lines in engine control units against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly at connector entry point to shunt transients before reaching MCU ADC or LIN transceiver. Use Value: Limits clamped voltage to 53.3 V, ensuring downstream 3.3 V/5 V logic remains within absolute maximum ratings during 100 V/10 ms load dump events. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Primary surge arrestor on dry-contact input stage, coordinated with series current-limiting resistor. Use Value: Responds in <1 ns to clamp 1 kV/500 A surges, preventing false triggering and contactor coil-induced latch-up in DIN-rail mounted controllers. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interface circuitry on base station line cards exposed to lightning-induced surges on copper pairs. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT), providing low-clamping backup protection for sensitive PHY ICs. Use Value: Delivers 53.3 V clamping at 9.4 A, reducing residual surge energy delivered to 100BASE-TX magnetics and PHY by >85 % vs. GDT-only solutions. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Flyback energy clamp across motor terminals, absorbing inductive kickback during PWM switching. Use Value: Handles repetitive 500 W pulses at 0.01 % duty cycle without degradation, extending motor driver MOSFET lifetime and reducing EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ33A | Same DO-214AC package; 33 V VWM, 53.3 V VC @ 9.4 A, but rated for 400 W PPPM (vs. 500 W for SA33HE3/54). | Lower peak power rating reduces margin for high-energy surges; requires verification against IEC 61000-4-5 Level 4. | Prefer SA33HE3/54 when full 500 W surge headroom is needed in automotive or industrial settings. |
| ON Semiconductor 1.5KE33CA | DO-201AD package; same 33 V VWM and bi-directionality, but larger footprint (7.1 mm x 5.3 mm vs. DO-15's 4.2 mm diameter) and higher VC (57.5 V). | Less space-efficient layout; higher clamping voltage increases stress on protected ICs. | Choose SA33HE3/54 for compact designs requiring tighter clamping and AEC-Q101 validation. |
Compared with SMAJ33A and 1.5KE33CA, SA33HE3/54 delivers superior peak power handling in a smaller axial package with automotive-qualified reliability and lower clamping voltage-making it optimal for space-constrained, high-surge industrial and automotive applications.
Availability
SA33HE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line-card protection requiring stable component supply, AEC-Q101 traceability, and RoHS/halogen-free compliance.
Supply support for SA33HE3/54 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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxHE3 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 validation and tight parametric control are mandatory.
FAQ
What is the polarity configuration of SA33HE3/54?
SA33HE3/54 is a bi-directional TVS diode with symmetrical anode/cathode terminals and no polarity marking. It clamps voltage transients equally in both directions, making it ideal for AC signal lines, differential buses like RS-485, and unidirectional power rails where reverse polarity risk exists. This eliminates orientation errors during assembly.
Does SA33HE3/54 meet automotive qualification standards?
Yes, SA33HE3/54 carries the HE3 suffix, indicating full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body model ESD (≥8 kV). This validates its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SA33HE3/54 under surge conditions?
The maximum clamping voltage (VC) of SA33HE3/54 is 53.3 V at 9.4 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across temperature and production lot, ensuring predictable protection for downstream 3.3 V or 5 V logic circuits even during worst-case surge events.
Can SA33HE3/54 be used in surface-mount designs?
No, SA33HE3/54 uses the axial DO-204AC (DO-15) package with through-hole leads. It is not a surface-mount device. For SMD alternatives, consider Vishay's SMAJ33A (DO-214AC) or SMF33A (SOD-123FL), though those lack AEC-Q101 qualification and differ in clamping performance and power rating.
How does the SA33HE3/54 compare to uni-directional variants like SA33A?
SA33HE3/54 is bi-directional with no cathode band and identical clamping in both polarities, while SA33A is uni-directional with a cathode marking and only clamps reverse transients. SA33HE3/54 supports AC-coupled or floating signal lines; SA33A is limited to DC-biased lines with defined polarity. Both share the same VWM, VBR, and PPPM, but SA33A has higher forward surge rating (70 A IFSM) not applicable to SA33HE3/54.
SA33HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SA33HE3/54 FAQ
1.How can I place an order for SA33HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33HE3/54 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 SA33HE3/54 reliable?
The price and inventory of SA33HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33HE3/54 is usually 5 days.
3.What payment methods are accepted for SA33HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33HE3/54?
SA33HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33HE3/54 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 SA33HE3/54?
For technical support, including SA33HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33HE3/54 requirements.
6.How does Aetrix verify that SA33HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA33HE3/54 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 SA33HE3/54 meets industry standards.
7.What is the process for return or replacement of SA33HE3/54?
All SA33HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA33HE3/54, 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 SA33HE3/54 part is unused and in its original packaging.
Return procedure for SA33HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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