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Vishay General Semiconductor - Diodes Division SMB8J33C-E3/52
- Part No.:
- SMB8J33C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33C-E3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,027
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Product details
Overview
SMB8J33C-E3/52 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 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage at 15 A peak pulse current, 800 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J33C-E3/52 datasheet, SMB8J33C-E3/52 pinout, SMB8J33C-E3/52 application, or SMB8J33C-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, bi-directional symmetry for AC-coupled lines, thermal resistance (RθJA = 72 °C/W), and RoHS-compliant, whisker-tested matte tin terminations.
Technical Context
This bi-directional TVS diode operates as a voltage-clamped crowbar device across protected nodes, activating when reverse or forward voltage exceeds its breakdown threshold (36.7–40.6 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1 µA at 33 V) and fast response (<1 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching transients.
Designed for surface-mount automation, it meets MSL level 1 (260 °C reflow peak) and delivers 800 W peak pulse power with low incremental surge resistance - critical for maintaining clamping voltage stability during multi-kA transients in automotive sensor interfaces and industrial I/O circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Breakdown voltage range confirming tight tolerance for predictable turn-on behavior. |
| VC @ IPPM | 53.3 V at 15 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to <54 V during worst-case transients. |
| PPPM | 800 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source). |
| IPPM | 15 A - Peak pulse current capacity; enables protection of CAN, LIN, and RS-485 buses without derating in standard PCB layouts. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pads per terminal for full power derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM >8 kV). |
Pinout & Package
DO-214AA (SMB) surface-mount package: molded epoxy case with cathode band marking; no polarity marking for bi-directional types; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No inherent polarity - terminals interchangeable; clamps both positive and negative transients equally. |
| Case (body) | Thermal and mechanical interface | Non-electrical; requires minimum 5.0 mm × 5.0 mm copper pad per lead for specified RθJA and power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled lines (e.g., CAN differential pairs) without external polarity management. |
| 800 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (2 Ω source impedance) without degradation over 1000+ events. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) across -55 °C to +150 °C operating range. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor modules requiring zero defect reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow profile compatibility without baking preconditioning. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 3.3 V or 5 V analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching precision ADC front-end. Use Value: Limits transient voltage to ≤53.3 V, preventing latch-up or gate oxide damage in downstream op-amps and microcontrollers. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044) against ESD and coupled noise in vehicle infotainment networks. IC Role / Device Role / Timing Role: Bi-directional clamp across CAN_H/CAN_L differential pair to maintain signal integrity during ±8 kV contact ESD events. Use Value: Maintains <1 ns response time and <0.5 pF junction capacitance at 0 V bias, avoiding data rate degradation up to 5 Mbps. |
| Industrial PLC I/O Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding 24 V digital input modules from inductive kickback caused by relay coil de-energization in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge limiter mounted adjacent to terminal block, absorbing 10/1000 µs transients up to 800 W. Use Value: Withstands repeated 1.5 kV surges per IEC 61000-4-4 while maintaining VWM = 33 V margin above 24 V nominal supply. |
Use Scenario: Protecting Ethernet PHY or xDSL line drivers from lightning-induced surges entering via outdoor cabling in telecom base stations. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tube (GDT), clamping residual transients after primary diversion. Use Value: Provides precise 53.3 V clamping to prevent overvoltage stress on 3.3 V or 5 V PHY ICs without adding signal distortion. |
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 DO-214AA package and 33 V VWM, but rated for 600 W PPPM (vs. 800 W); lower IPPM (12.3 A vs. 15 A). | Acceptable for lower-energy IEC 61000-4-2 ESD-only protection; insufficient for IEC 61000-4-5 Level 3+ surges. | Select when cost sensitivity outweighs need for highest surge margin and automotive qualification is not required. |
| SMCJ33CA-E3/52 | DO-214AB (SMC) package; same 33 V VWM and 800 W rating, but higher thermal mass and RθJA = 35 °C/W. | Better sustained power handling; requires larger PCB area and different footprint - not drop-in compatible. | Choose for industrial power supplies needing longer surge duration support, accepting larger board space and layout redesign. |
Compared with SMBJ33CA-E3/52, SMB8J33C-E3/52 delivers higher surge current headroom and AEC-Q101 validation; versus SMCJ33CA-E3/52, it trades thermal performance for compact SMB footprint - ideal where space-constrained automotive or consumer designs demand 800 W in minimal area.
Availability
SMB8J33C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, CAN bus networks, and telecom line drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J33C-E3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive-grade qualification.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-power-density, bi-directional surge protection in space-constrained automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J33C-E3/52 under a 10/1000 µs surge?
The SMB8J33C-E3/52 clamps to a maximum of 53.3 V at 15 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees predictable overvoltage limiting for downstream 3.3 V or 5 V ICs when used with proper PCB layout - specifically 5.0 mm × 5.0 mm copper pads per terminal as defined in the SMB8J33C-E3/52 datasheet.
Is SMB8J33C-E3/52 suitable for automotive applications?
Yes, SMB8J33C-E3/52 is AEC-Q101 qualified and explicitly validated for automotive use, including engine control units, body electronics, and ADAS sensor modules. Its construction - glass-passivated junction, matte tin terminations meeting JESD 201 Class 1A, and operation from -55 °C to +150 °C - satisfies stringent automotive reliability requirements. The SMB8J33C-E3/52 datasheet confirms compliance with temperature cycling, HTRB, and human-body-model ESD tests.
How does SMB8J33C-E3/52 differ from uni-directional SMB10J33A?
The SMB8J33C-E3/52 is bi-directional with symmetric clamping for AC signals, while SMB10J33A is uni-directional and conducts only in reverse bias. SMB8J33C-E3/52 has lower peak pulse power (800 W vs. 1000 W) and lower IPPM (15 A vs. 18.8 A), but supports dual-polarity transients without external circuitry. Both share the DO-214AA package and 33 V VWM, but SMB8J33C-E3/52 is marked "C" and lacks cathode band identification.
What is the thermal resistance of SMB8J33C-E3/52, and how does it affect layout?
SMB8J33C-E3/52 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 power, PCB layout must provide this minimum copper area - reducing pad size increases thermal impedance and forces derating per Figure 2 in the SMB8J33C-E3/52 datasheet. No internal heatsink or thermal vias are required for transient operation.
Does SMB8J33C-E3/52 have RoHS and lead-free compliance?
Yes, SMB8J33C-E3/52 carries the "E3" suffix indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance testing. The "E3/52" ordering code confirms packaging in 7" tape-and-reel with 750 units per reel - all documented in the official SMB8J33C-E3/52 datasheet revision 12-Nov-12.
SMB8J33C-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J33C-E3/52 FAQ
1.How can I place an order for SMB8J33C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33C-E3/52 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 SMB8J33C-E3/52 reliable?
The price and inventory of SMB8J33C-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J33C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33C-E3/52?
SMB8J33C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33C-E3/52 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 SMB8J33C-E3/52?
For technical support, including SMB8J33C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33C-E3/52 requirements.
6.How does Aetrix verify that SMB8J33C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J33C-E3/52 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 SMB8J33C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J33C-E3/52?
All SMB8J33C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33C-E3/52, 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 SMB8J33C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J33C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J33C-E3/52 Tags
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