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Vishay General Semiconductor - Diodes Division SM6S33AHE3_A/I
- Part No.:
- SM6S33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S33AHE3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,395
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Product details
Overview
SM6S33AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 33 V stand-off voltage (VWM), 38.7 V nominal breakdown voltage (VBR), 53.3 V clamping voltage at peak pulse current, 4600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM6S33AHE3_A/I datasheet, SM6S33AHE3_A/I pinout, SM6S33AHE3_A/I application, or SM6S33AHE3_A/I equivalent, key selection criteria include clamping performance under ISO7637-2 load dump transients, TJ = 175 °C operation, DO-218AB package thermal resistance (RθJM = 0.45 °C/W), and unidirectional polarity with anode-heatsink configuration.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping across -55 °C to +175 °C junction temperature range. Its DO-218AB package integrates a metal heatsink as the anode terminal, enabling low thermal resistance (0.45 °C/W junction-to-mount) and high surge robustness.
The device operates exclusively in unidirectional mode with 10 µA max reverse leakage at VWM (33 V) and 15 µA at TJ = 175 °C. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming suitability for lead-free reflow assembly in automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (nom) | 38.7 V - guaranteed breakdown voltage at 5 mA test current, defining turn-on threshold |
| VC @ IPPM | 53.3 V - clamping voltage during 4600 W transient, limiting downstream circuit stress |
| PPPM (10/1000 µs) | 4600 W - peak pulse power handling for standard ISO7637-2 load dump simulation |
| TJ max | +175 °C - enables placement near hot engine control units without derating |
| Polarity | Unidirectional - anode-connected heatsink provides low-inductance path for surge return |
| RθJM | 0.45 °C/W - junction-to-mount thermal resistance supports direct PCB copper pour heatsinking |
Pinout & Package
Package: DO-218AB - molded surface-mount case with integrated metal heatsink acting as anode terminal; meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Surge return path / thermal interface | Large metal base serves as both electrical anode and primary thermal conduction path to PCB copper |
| Cathode (Lead 1) | Transient voltage sensing / clamping node | Connected to protected line (e.g., battery rail); initiates avalanche conduction above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stable VBR over lifetime and temperature; eliminates parametric drift in harsh automotive environments |
| TJ = 175 °C rating | Enables direct mounting on ECU housings or near power converters without external heatsinks |
| MSL Level 1 | Compatible with standard 245 °C peak reflow profiles without moisture sensitivity concerns |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and surge endurance per stress test plan |
| Low leakage at high temperature | 15 µA max at 33 V and 175 °C ensures minimal standby power loss in always-on systems |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V battery-fed electronics during alternator field-cutoff events generating up to 60 V/100 ms transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input, conducting only during overvoltage. Use Value: Limits voltage to ≤53.3 V during 4600 W surges, preventing damage to upstream regulators and microcontrollers. | Use Scenario: Safeguarding power supply inputs of engine management ECUs exposed to cranking, jump-start, and load dump conditions. IC Role / Device Role / Timing Role: Primary overvoltage suppression device mounted directly at board edge connector, leveraging DO-218AB heatsink for thermal dissipation. Use Value: Maintains reliable operation at TJ = 175 °C ambient, eliminating need for derating or secondary thermal management. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Interface |
Use Scenario: Securing 12 V supply lines feeding lighting, door lock, and HVAC control modules in vehicle body networks. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 33 V) providing margin above nominal 12 V while blocking normal ripple. Use Value: 10 µA leakage at 25 °C and 15 µA at 175 °C minimizes quiescent current impact on battery drain budgets. | Use Scenario: Protecting front/rear camera modules powered from vehicle battery, subject to ignition noise and load dump. IC Role / Device Role / Timing Role: Fast-response avalanche diode suppressing transients within nanoseconds, preserving image sensor signal integrity. Use Value: 53.3 V clamping voltage ensures downstream LDOs and serializers remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S33AHM3 | Same electrical specs and DO-218AB package; HM3 suffix indicates halogen-free, Pb-free, and AEC-Q101 qualification with updated material categorization | No functional difference; intended as direct replacement for HE3-series in new designs | Select SM6S33AHM3 for new designs requiring latest Vishay material compliance and long-term availability |
| SMAJ33A | Lower PPPM (400 W vs. 4600 W), SMA package (RθJA ≈ 110 °C/W), no AEC-Q101 qualification, higher clamping (64.3 V) | Limited to low-energy transients; unsuitable for ISO7637-2 load dump; requires larger layout area for thermal relief | Use SMAJ33A only in cost-sensitive non-automotive applications with <500 W surge requirements |
Compared with SM6S33AHE3_A/I, SM6S33AHM3 offers identical protection performance with updated environmental compliance, while SMAJ33A provides significantly lower surge capability and lacks automotive qualification-making SM6S33AHE3_A/I the only choice for AEC-Q101-compliant load dump protection.
Availability
SM6S33AHE3_A/I is available at Aetrix Electronics and suitable for automotive power protection, engine control unit hardening, and ADAS camera interface design requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SM6S33AHE3_A/I 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 and automotive-grade qualification.
The SM6SxxA family is engineered specifically for high-energy automotive transients, delivering robust load dump protection in compact DO-218AB packages with industry-leading 4600 W pulse power and 175 °C operation.
FAQ
What is the clamping voltage of SM6S33AHE3_A/I at its rated peak pulse current?
The SM6S33AHE3_A/I has a maximum clamping voltage (VC) of 53.3 V when subjected to its peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TC = 25 °C and defines the upper voltage limit imposed on protected circuits during worst-case transients, ensuring downstream ICs remain within safe operating limits.
Is SM6S33AHE3_A/I qualified for automotive applications?
Yes, SM6S33AHE3_A/I is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 surge requirements, operates from -55 °C to +175 °C junction temperature, and passes JESD201 Class 2 whisker testing-making it suitable for under-hood engine control, body electronics, and ADAS power interfaces.
What does the "HE3" suffix mean in SM6S33AHE3_A/I?
The "HE3" suffix in SM6S33AHE3_A/I indicates RoHS-compliant, halogen-free construction with Pb-free matte tin plating, AEC-Q101 qualification, and compliance with JESD201 Class 2 whisker resistance. The "A/I" denotes packaging in 13-inch tape-and-reel with anode orientation toward sprocket holes.
How does the DO-218AB package of SM6S33AHE3_A/I improve thermal performance?
The DO-218AB package of SM6S33AHE3_A/I integrates a metal heatsink as the anode terminal, achieving a junction-to-mount thermal resistance (RθJM) of just 0.45 °C/W. This allows direct conduction of surge energy into large PCB copper pours, sustaining 4600 W pulses without external heatsinks or thermal derating.
Can SM6S33AHE3_A/I replace SM6S33AHM3 in existing designs?
SM6S33AHE3_A/I and SM6S33AHM3 share identical electrical specifications, DO-218AB mechanical outline, and AEC-Q101 qualification. While HM3 reflects Vishay's updated material compliance (e.g., enhanced halogen-free definition), HE3 remains functionally interchangeable-though new designs should adopt HM3 per Vishay's "Not For New Designs" guidance for HE3 variants.
SM6S33AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 86A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6S33AHE3_A/I FAQ
1.How can I place an order for SM6S33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S33AHE3_A/I 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 SM6S33AHE3_A/I reliable?
The price and inventory of SM6S33AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6S33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S33AHE3_A/I?
SM6S33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S33AHE3_A/I 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 SM6S33AHE3_A/I?
For technical support, including SM6S33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S33AHE3_A/I requirements.
6.How does Aetrix verify that SM6S33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6S33AHE3_A/I 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 SM6S33AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6S33AHE3_A/I?
All SM6S33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S33AHE3_A/I, 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 SM6S33AHE3_A/I part is unused and in its original packaging.
Return procedure for SM6S33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S33AHE3_A/I Tags
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