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Vishay General Semiconductor - Diodes Division SMB8J30CAHE3/52
- Part No.:
- SMB8J30CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHE3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,178
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Product details
Overview
SMB8J30CAHE3/52 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 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 16.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power rails.
For engineers reviewing the SMB8J30CAHE3/52 datasheet, SMB8J30CAHE3/52 pinout, SMB8J30CAHE3/52 application, or SMB8J30CAHE3/52 equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping performance, low leakage (<1.0 μA at VWM), and MSL Level 1 moisture sensitivity - critical for under-hood automotive electronics, industrial I/O protection, and robust PCB-level surge immunity design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction delivers fast response time (<1 ns) and stable breakdown behavior over temperature (-55 °C to +150 °C).
The device complies with ANSI/IEEE C62.35 surge standards and is rated for 800 W peak pulse power under 10/1000 μs waveform, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W - supporting reliable operation on standard 0.2" × 0.2" copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line |
| VBR min/max | 33.3 V / 36.8 V at 1.0 mA - guaranteed breakdown threshold ensures predictable turn-on during transients |
| VC @ IPPM | 48.4 V at 16.5 A - clamping voltage limits downstream IC stress during 10/1000 μs surge events |
| PPPM | 800 W - peak surge energy handling capacity for automotive load-dump and ISO 7637-2 pulse 5a compliance |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - extended junction temperature rating supports under-hood and industrial ambient conditions |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1) | Surge current input path | Either terminal accepts transient energy; bidirectional conduction enables dual-polarity clamping |
| Anode/Cathode (2) | Surge current return path | Completes low-impedance shunt path to ground or rail; requires direct low-inductance PCB routing |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD robustness - eliminates requalification effort for Tier 1 designs |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - critical for protecting 3.3 V and 5 V logic interfaces |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from ISO 7637-2 pulses and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Maintains <1.0 μA leakage at 30 V VWM to avoid loading sensor output, while limiting clamped voltage to 48.4 V during 100 V/50 ms load dump. | Use Scenario: Safeguarding CAN_H and CAN_L lines in vehicle body control modules against coupled surges from adjacent power switching. IC Role / Device Role / Timing Role: Dual TVS pair (one per line) referenced to chassis ground, leveraging symmetrical clamping to preserve differential signaling integrity. Use Value: 48.4 V clamping ensures CAN transceiver inputs remain within absolute maximum ratings even during 800 W surge events. |
| Power Supply Rail Clamp | Telecom DSL Line Protection |
Use Scenario: Secondary overvoltage protection on 24 V DC input rails feeding ADAS domain controllers after primary DC/DC conversion. IC Role / Device Role / Timing Role: Shunt device placed between rail and ground, activated only during >33.3 V transients to prevent damage to downstream regulators and FETs. Use Value: 800 W PPPM rating handles repetitive load-dump energy without degradation; RθJL = 20 °C/W enables efficient heat transfer to PCB copper. | Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed across line pair (tip/ring) to divert common-mode surges before transformer coupling. Use Value: Symmetric 33.3–36.8 V VBR ensures balanced clamping on both conductors, preserving signal symmetry and minimizing 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 |
|---|---|---|---|
| SMBJ30CAHE3/52 | 1000 W PPPM (unidirectional rating only); same VWM/VBR/VC but higher IPPM (20.7 A) | Unidirectional variant - unsuitable for AC or differential lines requiring bidirectional clamping | Select only when protecting DC rails with defined polarity and higher surge margin required |
| SMAJ30CAHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Limited to lower-energy transients; less thermal mass reduces sustained surge capability | Choose for space-constrained consumer electronics where 800 W rating is excessive |
Compared with SMBJ30CAHE3/52 and SMAJ30CAHE3/A, SMB8J30CAHE3/52 uniquely balances 800 W bidirectional surge handling, AEC-Q101 qualification, and SMB footprint - making it optimal for automotive signal-line protection where polarity-agnostic clamping and thermal reliability are mandatory.
Availability
SMB8J30CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom line protection, and 24 V power rail clamping requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J30CAHE3/52 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 qualification.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in demanding automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J30CAHE3/52 and how is it measured?
The SMB8J30CAHE3/52 has a maximum clamping voltage (VC) of 48.4 V, measured at 16.5 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform. This value reflects the actual voltage seen by downstream circuitry during worst-case transient events and is guaranteed across temperature and production lot variations per Vishay's datasheet specification.
Is SMB8J30CAHE3/52 suitable for protecting CAN FD bus lines?
Yes, SMB8J30CAHE3/52 is suitable for CAN FD line protection due to its bidirectional operation, 48.4 V clamping voltage, and fast sub-nanosecond response. Its 30 V stand-off voltage accommodates typical CAN FD common-mode ranges, and AEC-Q101 qualification ensures robustness against automotive electrical transients including ISO 16750 and ISO 7637-2 pulses.
Does SMB8J30CAHE3/52 require a heatsink for 800 W surge handling?
No, SMB8J30CAHE3/52 does not require an external heatsink for single-event 800 W surge handling. Its thermal design relies on PCB copper pad area (0.2" × 0.2" per terminal) and low RθJL (20 °C/W) to dissipate transient energy. Continuous power dissipation is not applicable - the device is rated for non-repetitive pulses only, per Fig. 2 derating curves.
How does the HE3 suffix affect SMB8J30CAHE3/52 compared to base SMB8J30CA?
The HE3 suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2. This distinguishes SMB8J30CAHE3/52 from commercial-grade variants (e.g., E3) and confirms its suitability for automotive production, unlike non-HE3 versions which lack formal automotive qualification.
Can SMB8J30CAHE3/52 replace SMBJ30CAHE3/52 in an existing design?
No - SMB8J30CAHE3/52 cannot directly replace SMBJ30CAHE3/52 because it is bidirectional (800 W PPPM), whereas SMBJ30CAHE3/52 is unidirectional (1000 W PPPM). Substitution would compromise protection on negatively biased transients and reduce surge margin. A redesign evaluating clamping symmetry, leakage impact, and layout grounding is required before interchange.
SMB8J30CAHE3/52 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 16.5A
- 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)
SMB8J30CAHE3/52 FAQ
1.How can I place an order for SMB8J30CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHE3/52 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 SMB8J30CAHE3/52 reliable?
The price and inventory of SMB8J30CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J30CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHE3/52?
SMB8J30CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHE3/52 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 SMB8J30CAHE3/52?
For technical support, including SMB8J30CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J30CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHE3/52 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 SMB8J30CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHE3/52?
All SMB8J30CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHE3/52, 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 SMB8J30CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J30CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHE3/52 Tags
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