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Vishay General Semiconductor - Diodes Division SMB8J33CAHE3/52
- Part No.:
- SMB8J33CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CAHE3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,601
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Product details
Overview
SMB8J33CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 33 V standoff voltage (VWM), 53.3 V clamping voltage (VC) at 15 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) under 10/1000 μs waveform - deployed in automotive sensor signal lines and power rails per AEC-Q101 qualification.
For engineers reviewing the SMB8J33CAHE3/52 datasheet, SMB8J33CAHE3/52 pinout, SMB8J33CAHE3/52 application, or SMB8J33CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 33 V stand-off rating, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 72 °C/W junction-to-ambient thermal resistance requires careful PCB pad design (minimum 0.2" × 0.2" copper per terminal) to sustain repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 36.7 V min / 40.6 V max at 1 mA - precise voltage threshold where avalanche conduction initiates under controlled test conditions. |
| VC (Clamping Voltage) | 53.3 V at IPPM = 15 A (10/1000 μs) - maximum voltage seen by protected circuit during worst-case surge event. |
| PPPM (Peak Pulse Power) | 800 W - energy-handling capacity under standardized 10/1000 μs transient waveform; determines survivability against lightning or load-dump surges. |
| ID (Reverse Leakage) | 1.0 μA at VWM - negligible standby current ensuring minimal power loss and signal integrity in high-impedance circuits. |
| RθJL (Junction-to-Lead) | 20 °C/W - low thermal resistance enabling efficient heat transfer to PCB copper, critical for reliability under repeated surges. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetric terminals suitable for AC-coupled or floating signal line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals serve identical roles; bidirectional operation eliminates need for orientation during placement. |
| Case (body) | Thermal interface | Plastic body transfers heat to PCB copper pads; requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or ungrounded lines without polarity constraints or external diode pairing. |
| AEC-Q101 qualification | Validated for automotive environments including engine control units, ADAS sensors, and infotainment interfaces requiring extended temperature and life-cycle reliability. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure. |
| Low-profile SMB package | 0.130"–0.155" height enables compact layout in space-constrained modules such as camera ECUs and battery management systems. |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without moisture-induced damage or popcorn effect. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins in vehicle door modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp surges before reaching transceiver input stage. Use Value: Maintains signal integrity during 800 W transients while meeting AEC-Q101 requirements for 15-year automotive service life. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines in factory automation PLCs exposed to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to suppress common-mode and differential-mode transients simultaneously. Use Value: Prevents bus lockup or transceiver latch-up by limiting voltage excursion to ≤53.3 V during 10/1000 μs surges. |
| Consumer Power Adapter Input | Telecom DC Power Feeds |
Use Scenario: Input-stage surge protection for USB-C PD adapters subjected to AC line transients and hot-plug events. IC Role / Device Role / Timing Role: Primary clamping device between bridge rectifier output and bulk capacitor, absorbing energy before downstream regulators. Use Value: Withstands 800 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
Use Scenario: DC input protection for PoE-powered network switches handling 48 V DC feeds in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across DC input rails to clamp induced surges from nearby lightning strikes or ground potential differences. Use Value: 33 V VWM provides sufficient margin above 48 V nominal while clamping to 53.3 V to protect upstream DC-DC controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-E3/52 | Same SMB package and 33 V VWM, but rated for 600 W PPPM (vs. 800 W) and lacks AEC-Q101 qualification. | Commercial-grade only; unsuitable for automotive or mission-critical industrial use where qualification is mandated. | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is sufficient. |
| SMCJ33CAHE3_A/H | Higher-power SMC (DO-214AB) package with 1500 W PPPM, same 33 V VWM and AEC-Q101 qualification. | Larger footprint (0.265" × 0.235") and higher thermal mass; better for sustained surge duty but less space-efficient. | Choose when system-level surge requirements exceed 800 W or board layout allows larger package for enhanced robustness. |
Compared with SMBJ33CA-E3/52 and SMCJ33CAHE3_A/H, SMB8J33CAHE3/52 uniquely balances AEC-Q101 compliance, 800 W surge capability, and SMB footprint - making it optimal for space-constrained automotive modules requiring verified reliability without over-engineering.
Availability
SMB8J33CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom DC power feeds requiring stable component supply, AEC-Q101 traceability, and consistent 33 V clamping performance across production batches.
Supply support for SMB8J33CAHE3/52 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, precision, and automotive-grade validation.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-density, high-reliability transient suppression in automotive and industrial systems where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB8J33CAHE3/52 under standard test conditions?
The SMB8J33CAHE3/52 has a maximum clamping voltage (VC) of 53.3 V at 15 A peak pulse current (IPPM) using the 10/1000 μs waveform per ANSI/IEEE C62.35. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per terminal, and represents the upper limit of voltage imposed on protected circuitry during surge events.
Is SMB8J33CAHE3/52 qualified for automotive applications?
Yes, SMB8J33CAHE3/52 is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing (uHAST).
What does the "CA" suffix indicate in SMB8J33CAHE3/52?
The "CA" suffix in SMB8J33CAHE3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This differs from "A"-suffixed unidirectional parts, which protect only one polarity and require correct cathode orientation during placement.
How does SMB8J33CAHE3/52 differ from SMBJ33CA-E3/52?
SMB8J33CAHE3/52 delivers 800 W peak pulse power (PPPM) versus 600 W for SMBJ33CA-E3/52, and carries AEC-Q101 qualification (via HE3 suffix) whereas SMBJ33CA-E3/52 is commercial-grade only. Both share the same SMB package and 33 V VWM, but SMB8J33CAHE3/52 is specified for higher-energy transients and automotive deployment.
What PCB layout guidance applies to SMB8J33CAHE3/52 for optimal thermal performance?
Vishay specifies minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad areas per terminal for SMB8J33CAHE3/52 to achieve rated surge performance and manage thermal dissipation. Reducing pad size degrades both peak pulse current handling and junction temperature rise - derating curves in Figure 2 of Document 88422 quantify this effect above TA = 25 °C.
SMB8J33CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J33CAHE3/52 FAQ
1.How can I place an order for SMB8J33CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CAHE3/52 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 SMB8J33CAHE3/52 reliable?
The price and inventory of SMB8J33CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J33CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CAHE3/52?
SMB8J33CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CAHE3/52 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 SMB8J33CAHE3/52?
For technical support, including SMB8J33CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J33CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J33CAHE3/52 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 SMB8J33CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J33CAHE3/52?
All SMB8J33CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CAHE3/52, 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 SMB8J33CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J33CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J33CAHE3/52 Tags
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