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Vishay General Semiconductor - Diodes Division SMB8J33CHE3/5B
- Part No.:
- SMB8J33CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CHE3/5B.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,123
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Product details
Overview
SMB8J33CHE3/5B 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 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage at 15.0 A peak pulse current, and 800 W peak pulse power rating with 10/1000 µs waveform. Used in automotive sensor interfaces and industrial I/O protection where AEC-Q101 qualification and low leakage (<1.0 µA) are required.
For engineers reviewing the SMB8J33CHE3/5B datasheet, SMB8J33CHE3/5B pinout, SMB8J33CHE3/5B application, or SMB8J33CHE3/5B equivalent, key selection criteria include bi-directional clamping performance, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 36.7–40.6 V (min/max) under 1 mA test current. Its low incremental surge resistance enables fast response to transients induced by inductive switching or ESD events.
Thermal design relies on junction-to-ambient thermal resistance of 72 °C/W and junction-to-lead resistance of 20 °C/W, requiring adherence to recommended pad layout (0.2" × 0.2") for rated 800 W pulse handling. The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 53.3 V - Clamped voltage at 15.0 A peak pulse current; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surge events. |
| IPPM | 15.0 A - Peak surge current supported at rated clamping voltage; correlates directly with system-level surge immunity level. |
| Leakage (ID) | <1.0 µA - Reverse leakage at VWM; critical for low-power sensor and battery-backed circuits. |
| TJ max | 150 °C - Maximum junction temperature; sets upper limit for thermal design and derating above 25 °C ambient. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either terminal serves as anode or cathode depending on transient polarity. |
| Cathode Band (absent) | Polarity indicator | Not present on bi-directional variants - device functions identically regardless of orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces under extended temperature and reliability stress testing. |
| Glass passivated chip junction | Ensures stable electrical characteristics and long-term reliability under humidity and thermal cycling conditions typical in industrial environments. |
| Low profile DO-214AA package | Enables high-density PCB layouts while maintaining 800 W surge capability - ideal for space-constrained automotive ECUs and IoT edge nodes. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking, simplifying manufacturing flow for high-volume SMT assembly. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for safety-critical systems in automotive and industrial equipment. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in 12 V vehicle systems. IC Role / Device Role: Bi-directional clamping element placed directly at connector interface to shunt surge energy before reaching sensitive ICs. Use Value: With 53.3 V clamping at 15 A and AEC-Q101 qualification, SMB8J33CHE3/5B maintains signal integrity while meeting OEM surge immunity requirements. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with series impedance to limit let-through energy. Use Value: 800 W peak power rating and 1.0 µA leakage enable reliable operation in always-on monitoring circuits without false triggering. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Transient suppression on RS-485 data lines in base station remote units subjected to lightning-induced surges. IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp precision for PHY-level ICs. Use Value: Symmetrical bi-directional behavior ensures consistent clamping on differential pairs without polarity concerns during installation. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in smart home appliances (e.g., washing machine motor inverters) from commutation spikes. IC Role / Device Role: Localized TVS adjacent to MOSFET gate driver outputs to prevent latch-up or oxide damage during switching transitions. Use Value: 72 °C/W thermal resistance supports sustained operation in enclosed enclosures with limited airflow, validated per JEDEC JESD22-A108. |
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-E3/5B | Same DO-214AA package and 33 V VWM, but rated for 600 W PPPM (vs. 800 W) and lower IPPM (12.3 A). | Less suitable for IEC 61000-4-5 Level 4 compliance; acceptable for lower-energy consumer-grade interfaces. | Select SMB8J33CHE3/5B when full 800 W surge margin is required; choose SMBJ33CA-E3/5B only if cost optimization outweighs headroom needs. |
| SMCJ33CAHE3/5B | DO-214AB (SMC) package, same 33 V VWM, higher 1500 W PPPM, but larger footprint and 100 °C/W RθJA. | Better for high-power industrial drives but incompatible with SMB-restricted board space; requires PCB redesign. | Choose SMB8J33CHE3/5B for space-constrained AEC-Q101 designs; use SMCJ33CAHE3/5B only when higher power rating justifies larger package and thermal trade-offs. |
Compared with SMBJ33CA-E3/5B and SMCJ33CAHE3/5B, SMB8J33CHE3/5B uniquely balances AEC-Q101 qualification, 800 W surge capacity, and DO-214AA footprint - making it optimal for automotive and industrial edge nodes where reliability, size, and standardized qualification converge.
Availability
SMB8J33CHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface applications requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J33CHE3/5B 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, automotive qualification, and high-power density packaging.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 and UL 94 V-0 compliance are mandatory.
FAQ
What is the clamping voltage of SMB8J33CHE3/5B at its rated peak pulse current?
The SMB8J33CHE3/5B has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 15.0 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet revision 12-Nov-12, page 3, bi-directional table entry for SMB8J33CA.
Is SMB8J33CHE3/5B suitable for automotive applications?
Yes, SMB8J33CHE3/5B is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product documentation. Its construction includes glass-passivated junction, MSL Level 1 rating, and operation across –55 °C to +150 °C, making it appropriate for engine bay sensors, body control modules, and ADAS interfaces where certified reliability is required.
What does the "HE3" suffix indicate in SMB8J33CHE3/5B?
The "HE3" suffix in SMB8J33CHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification (H), matte tin plating (E), and JESD 201 class 2 whisker resistance (3). This distinguishes it from commercial-grade "E3" variants and confirms suitability for automotive and high-reliability industrial use cases.
How does SMB8J33CHE3/5B differ from uni-directional SMB10J33A?
SMB8J33CHE3/5B is bi-directional with symmetrical clamping and no cathode band, while SMB10J33A is uni-directional with polarity marking and higher 1000 W PPPM. The SMB8J variant supports AC-coupled or differential signal lines (e.g., RS-485), whereas SMB10J33A suits DC power rail protection where polarity is fixed and higher surge capacity is needed.
What is the thermal resistance of SMB8J33CHE3/5B, and how does it affect layout?
SMB8J33CHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve rated 800 W pulse performance, PCB layout must follow Vishay's recommended pad dimensions - undersized pads will cause excessive junction temperature rise and derated surge capability.
SMB8J33CHE3/5B 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)
SMB8J33CHE3/5B FAQ
1.How can I place an order for SMB8J33CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CHE3/5B 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 SMB8J33CHE3/5B reliable?
The price and inventory of SMB8J33CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J33CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CHE3/5B?
SMB8J33CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CHE3/5B 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 SMB8J33CHE3/5B?
For technical support, including SMB8J33CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CHE3/5B requirements.
6.How does Aetrix verify that SMB8J33CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J33CHE3/5B 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 SMB8J33CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J33CHE3/5B?
All SMB8J33CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CHE3/5B, 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 SMB8J33CHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J33CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J33CHE3/5B Tags
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