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Vishay General Semiconductor - Diodes Division SMB8J33CHE3/52
- Part No.:
- SMB8J33CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CHE3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,924
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Product details
Overview
SMB8J33CHE3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 53.3 V clamping voltage (VC) at 15.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial I/O lines against ESD and load dump transients.
For engineers reviewing the SMB8J33CHE3/52 datasheet, SMB8J33CHE3/52 pinout, SMB8J33CHE3/52 application, or SMB8J33CHE3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 33 V working voltage compatibility with 3.3 V/5 V/12 V rail systems, thermal resistance (RθJA = 72 °C/W), and RoHS-compliant HE3 suffix indicating automotive-grade reliability.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive surge events.
The device complies with ANSI/IEEE C62.35 standards for transient suppression and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal design relies on 0.2" × 0.2" copper pads per terminal to sustain 800 W pulse power and maintain junction temperature ≤150 °C during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; matches 33 V nominal bus or sensor supply rails. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 1.0 mA test current; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 53.3 V at 15.0 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; suitable for ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 surges. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 72 °C/W - Thermal resistance junction-to-ambient on standard PCB pad layout; informs heatsinking requirements for sustained surge duty. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminals allow mounting in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional clamping occurs regardless of voltage polarity applied. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bi-directional functionality; no cathode/anode distinction required in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded sensor outputs without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, ADAS sensors, and body electronics modules. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 µA) over temperature and lifetime, critical for low-power sensor interfaces. |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns - no baking required prior to assembly. |
| RoHS-compliant HE3 suffix | Indicates matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 2 whisker resistance for automotive production. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay and chassis modules. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector entry point to shunt ESD and load-dump energy away from precision ADC front-ends. Use Value: Limits clamped voltage to 53.3 V, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal conditioning ICs. | Use Scenario: Safeguarding 24 V PLC digital input channels exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary surge clamp on dry-contact inputs, positioned before optocoupler or Schmitt-trigger input stage. Use Value: Withstands 800 W pulses and maintains <1.0 µA leakage at 33 V, preserving input threshold accuracy and reducing false triggering. |
| Automotive CAN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Bi-directional protection of CAN_H and CAN_L lines in telematics and infotainment gateways. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) suppressing EFT and ESD without distorting 1 Mbps differential signaling. Use Value: Symmetrical clamping ensures equal response to positive/negative transients, maintaining common-mode noise rejection integrity. | Use Scenario: Suppressing commutation spikes on microcontroller GPIOs driving small brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS at motor driver output pins to prevent MCU reset or port latch-up during stall or direction reversal. Use Value: Fast response time and 53.3 V clamping protect 5 V logic-level drivers while surviving repeated 800 W surge events in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J33CA-E3/52 | Same electrical specs and DO-214AA package, but commercial-grade (non-AEC-Q101) with E3 suffix. | Lacks automotive qualification; suitable for industrial or consumer applications where AEC-Q101 is not mandated. | Select SMB8J33CA-E3/52 when cost optimization is prioritized and automotive reliability testing is unnecessary. |
| SMCJ33CAHE3/A | Higher PPPM (1500 W), larger DO-214AB (SMC) package, same 33 V VWM and bi-directional function. | Better suited for higher-energy threats (e.g., ISO 16750-2 load dump); requires larger PCB footprint and different pad layout. | Choose SMCJ33CAHE3/A when system-level surge testing exceeds 800 W requirements and board space permits larger package. |
Compared with SMB8J33CHE3/52, SMB8J33CA-E3/52 offers identical performance at lower qualification cost, while SMCJ33CAHE3/A trades compactness for higher surge margin - selection depends on automotive compliance needs and PCB area constraints.
Availability
SMB8J33CHE3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, CAN bus gateways, and appliance motor controllers requiring stable component supply with full traceability and lifecycle management.
Supply support for SMB8J33CHE3/52 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 and automotive-grade validation.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-density, AEC-Q101-compliant transient protection in harsh automotive and industrial environments.
FAQ
What is the polarity configuration of SMB8J33CHE3/52?
SMB8J33CHE3/52 is a bi-directional TVS diode with symmetrical terminals and no cathode band marking. This allows it to clamp voltage transients of either polarity equally, making it ideal for protecting AC-coupled lines, differential buses like CAN or RS-485, and ungrounded sensor outputs without orientation constraints during placement.
Does SMB8J33CHE3/52 meet automotive qualification standards?
Yes, SMB8J33CHE3/52 is AEC-Q101 qualified, as confirmed by Vishay's documentation. The "HE3" suffix denotes RoHS-compliant, automotive-grade construction with JESD 201 Class 2 whisker resistance and MSL Level 1 reflow capability - all validated per AEC-Q101 stress test requirements for use in engine control, ADAS, and body electronics.
What is the maximum clamping voltage of SMB8J33CHE3/52 under surge conditions?
The maximum clamping voltage (VC) of SMB8J33CHE3/52 is 53.3 V at 15.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry - such as 3.3 V or 5 V microcontrollers and interface ICs - remains within safe operating voltage limits during transient events.
How does the thermal performance of SMB8J33CHE3/52 affect PCB layout?
SMB8J33CHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤150 °C during 800 W surges, designers must provide adequate copper area and avoid excessive trace length or isolation - insufficient copper will cause thermal runaway and premature failure under repeated surge stress.
Can SMB8J33CHE3/52 be used in place of a uni-directional TVS diode?
No - SMB8J33CHE3/52 is strictly bi-directional and lacks an anode/cathode distinction. Replacing a uni-directional TVS (e.g., SMB10J33A) with SMB8J33CHE3/52 may compromise protection on DC-biased lines where forward conduction must be blocked. Use only where symmetrical clamping is required, such as AC signal paths or differential buses.
SMB8J33CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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):
- 13.6A
- 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)
SMB8J33CHE3/52 FAQ
1.How can I place an order for SMB8J33CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CHE3/52 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 SMB8J33CHE3/52 reliable?
The price and inventory of SMB8J33CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J33CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CHE3/52?
SMB8J33CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CHE3/52 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 SMB8J33CHE3/52?
For technical support, including SMB8J33CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CHE3/52 requirements.
6.How does Aetrix verify that SMB8J33CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J33CHE3/52 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 SMB8J33CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J33CHE3/52?
All SMB8J33CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CHE3/52, 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 SMB8J33CHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J33CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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