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Vishay General Semiconductor - Diodes Division SMB8J33CAHE3_A/H
- Part No.:
- SMB8J33CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CAHE3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J33CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) 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) at 1 mA, 53.3 V clamping voltage (VC) at 15 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J33CAHE3_A/H datasheet, SMB8J33CAHE3_A/H pinout, SMB8J33CAHE3_A/H application, or SMB8J33CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Rated for -55 °C to +150 °C operating junction temperature, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 1000× surge cycles at 8.3 ms half-sine waveform, and delivers consistent clamping performance across temperature due to tight VBR tolerance (±5%) and low thermal resistance (RθJL = 20 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe operating margin below clamping threshold |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - precise breakdown range enabling predictable turn-on during transients |
| VC @ IPPM | 53.3 V at 15 A - clamping voltage limits downstream IC stress to ≤53.3 V during 10/1000 μs surge |
| PPPM | 800 W - peak pulse power handling capacity with 10/1000 μs waveform; determines survivability against lightning/ESD surges |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Surge current return path | Bidirectional symmetry means either terminal serves as cathode or anode depending on transient polarity; no marking required |
| Anode (Cathode) | Surge current entry point | Identical electrical behavior in both directions; terminals interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| MSL Level 1 rating | Enables single-pass reflow without moisture sensitivity concerns; peak temperature up to 260 °C supported |
| Low clamping ratio (VC/VBR) | 1.42 typical - minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| High IPPM density | 15 A peak pulse current in SMB footprint - delivers 800 W protection in compact 4.57 mm × 3.94 mm outline |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector interface to limit transient voltage before reaching signal conditioning circuitry. Use Value: With 53.3 V clamping and AEC-Q101 qualification, SMB8J33CAHE3_A/H prevents latch-up or damage in automotive microcontrollers operating at 3.3 V or 5 V rails. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to absorb repetitive 10/1000 μs surges up to 800 W without degradation. Use Value: 1.0 μA leakage at 33 V VWM avoids false triggering in high-impedance optocoupler input circuits while maintaining fast response (<1 ns). |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Front-end protection of Ethernet PHYs and RS-485 transceivers against ESD and lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor mounted adjacent to RJ45 or terminal block to reduce energy delivered to secondary protection (e.g., GDT + MOV). Use Value: 800 W PPPM and 53.3 V VC enable robust protection of 3.3 V/5 V PHYs without requiring oversized board area - critical for space-constrained telecom modules. |
Use Scenario: Secondary-side surge suppression on 33 V DC output rails of AC/DC adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Clamp overvoltage events caused by capacitor discharge or regulator fault conditions before reaching downstream PMICs or USB-PD controllers. Use Value: Tight VBR tolerance (±5%) and 150 °C TJ max ensure reliable operation across ambient temperatures from -40 °C to +85 °C in enclosed adapter housings. |
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, 33 V VWM, but rated for 600 W PPPM (vs. 800 W); non-AEC-Q101, commercial grade only | Lacks automotive qualification and lower surge rating; suitable for cost-sensitive consumer or industrial designs without automotive compliance needs | Select SMBJ33CA-E3/52 only if AEC-Q101 is not required and system-level surge testing confirms 600 W sufficiency |
| SMCJ33CAHE3_A/H | Same AEC-Q101 qualification and 33 V rating, but in larger SMC (DO-214AB) package with 1500 W PPPM and 17.5 A IPPM | Higher power handling and thermal mass; requires larger PCB footprint and different pad layout | Choose SMCJ33CAHE3_A/H when system-level surge tests exceed 800 W or when extended thermal margin is needed in high-power industrial environments |
Compared with SMBJ33CA-E3/52, SMB8J33CAHE3_A/H provides 33% higher peak pulse power and automotive qualification; versus SMCJ33CAHE3_A/H, it offers identical reliability in a 30% smaller footprint but with reduced surge headroom - ideal for space-constrained AEC-Q101 designs where 800 W meets IEC 61000-4-5 Level 3 requirements.
Availability
SMB8J33CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J33CAHE3_A/H 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 validation.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-reliability bidirectional surge suppression in automotive and industrial environments where compact size and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMB8J33CAHE3_A/H at its rated peak pulse current?
The SMB8J33CAHE3_A/H has a maximum clamping voltage (VC) of 53.3 V at 15 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 53.3 V during surge events - critical for protecting 3.3 V or 5 V logic interfaces. The SMB8J33CAHE3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J33CAHE3_A/H qualified for automotive applications?
Yes, SMB8J33CAHE3_A/H is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88422 (Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness - making SMB8J33CAHE3_A/H suitable for under-hood and cabin-mounted automotive systems such as ADAS sensors, body control modules, and infotainment power supplies.
What is the standoff voltage (VWM) and why does it matter for SMB8J33CAHE3_A/H?
The standoff voltage (VWM) of SMB8J33CAHE3_A/H is 33 V - the maximum continuous reverse voltage the device can withstand without exceeding 1.0 μA leakage current. This parameter defines the upper limit of normal operating voltage in the protected circuit; selecting a VWM ≥ 110% of the system's nominal voltage (e.g., 33 V for a 30 V rail) ensures reliable blocking during steady-state operation while allowing headroom for ripple and tolerance. For SMB8J33CAHE3_A/H, this enables safe use on 24 V and 30 V automotive and industrial buses.
How does the SMB8J33CAHE3_A/H differ from unidirectional TVS diodes like SMB10J33A?
Unlike unidirectional TVS diodes such as SMB10J33A, the SMB8J33CAHE3_A/H is bidirectional - meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This eliminates the need for orientation-aware placement and makes SMB8J33CAHE3_A/H ideal for AC-coupled lines, differential buses (e.g., RS-485), and systems where transient polarity is unpredictable. SMB10J33A, in contrast, functions only in one direction and requires correct cathode alignment.
What packaging and reel options are available for SMB8J33CAHE3_A/H?
SMB8J33CAHE3_A/H is supplied in 7" diameter plastic tape and reel with 750 units per reel (package code H), as specified in Vishay's ordering information. The "_A/H" suffix denotes this specific reel configuration. It uses matte tin-plated leads compliant with J-STD-002 and JESD22-B102, supporting lead-free reflow profiles up to 260 °C peak. No alternate packaging (e.g., bulk, ammo pack) is listed for this variant in the official documentation.
SMB8J33CAHE3_A/H 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:
- 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_A/H FAQ
1.How can I place an order for SMB8J33CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CAHE3_A/H 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_A/H reliable?
The price and inventory of SMB8J33CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J33CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CAHE3_A/H?
SMB8J33CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CAHE3_A/H 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_A/H?
For technical support, including SMB8J33CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J33CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J33CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J33CAHE3_A/H?
All SMB8J33CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMB8J33CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J33CAHE3_A/H Tags
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