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Vishay General Semiconductor - Diodes Division SMB8J30CAHE3_A/H
- Part No.:
- SMB8J30CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHE3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,711
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Product details
Overview
SMB8J30CAHE3_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 30 V standoff voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 16.5 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 SMB8J30CAHE3_A/H datasheet, SMB8J30CAHE3_A/H pinout, SMB8J30CAHE3_A/H application, or SMB8J30CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The device delivers 800 W peak pulse power handling per 10/1000 µs waveform under standard mounting conditions, with thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets ANSI/IEEE C62.35 surge standards and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias range. |
| VBR min/max | 33.3 V / 36.8 V at IT = 1 mA - tight breakdown window ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 48.4 V at 16.5 A - clamping voltage limits downstream IC stress during 800 W transient surges. |
| PPPM | 800 W (10/1000 µs) - energy-handling capacity suitable for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3. |
| 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 enables use in under-hood automotive environments. |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with high-volume pick-and-place and reflow processes. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | No polarity marking required; terminals interchangeable - enables simplified PCB layout and reduced BOM variants. |
| Cathode Band (absent) | Non-applicable | Confirmed bidirectional construction: no cathode band or polarity indicator per datasheet note. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime stress. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without moisture-related popcorning or delamination. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| 800 W peak pulse power | Provides margin above ISO 7637-2 Pulse 5a (400 W typical) for robust system-level surge immunity. |
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 ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and ADCs during 12 V/24 V system surges. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and field wiring transients. IC Role / Device Role / Timing Role: Primary front-end TVS on 24 V DC input channels, coordinated with series impedance for IEC 61000-4-5 compliance. Use Value: Enables >20 kV ESD and 1 kV/500 A surge immunity without derating or parallel device stacking. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from induced surges on unshielded twisted-pair cabling in building networks. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual energy below PHY IC absolute maximum ratings. Use Value: Maintains <10 ns response time and sub-50 V clamping to preserve 100BASE-TX signal integrity during surge events. |
Use Scenario: Output-side transient suppression on 5 V/9 V/12 V USB-C and barrel-jack adapters subject to hot-plug and cable coupling noise. IC Role / Device Role / Timing Role: Final-stage TVS between DC-DC converter output and connector, minimizing capacitive loading on regulated rail. Use Value: Limits output voltage excursion to ≤48.4 V during 8/20 µs surges, preventing downstream USB PD controller reset or damage. |
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_A/H | Same SMB package and VWM/VBR/VC specs, but rated for 600 W PPPM (vs. 800 W); lower IPPM (13.3 A vs. 16.5 A). | Suitable for lower-energy threat profiles (e.g., IEC 61000-4-2 ESD only), not recommended for ISO 7637-2 Pulse 5a. | Select SMBJ30CAHE3_A/H only when system-level surge testing confirms 600 W margin is sufficient. |
| SMAJ30CAHE3_A/H | Smaller SMA (DO-214AC) package; same electrical specs but higher RθJA (90 °C/W vs. 72 °C/W); 400 W PPPM rating. | Limited to low-power signal lines due to thermal derating; unsuitable for 24 V industrial power rail protection. | Choose SMAJ30CAHE3_A/H only for space-constrained PCBs where peak power demand stays below 400 W. |
Compared with SMBJ30CAHE3_A/H and SMAJ30CAHE3_A/H, SMB8J30CAHE3_A/H provides superior 800 W surge handling and lower thermal resistance - making it the preferred choice for AEC-Q101-compliant automotive and industrial power-line protection where sustained energy dissipation matters.
Availability
SMB8J30CAHE3_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 outputs requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J30CAHE3_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, efficiency, and automotive qualification.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J30CAHE3_A/H at its rated peak pulse current?
The SMB8J30CAHE3_A/H has a maximum clamping voltage (VC) of 48.4 V at 16.5 A peak pulse current (IPPM), measured under standardized 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during an 800 W transient event and is confirmed in the "Bidirectional" electrical characteristics table on page 3 of Vishay document 88422.
Is SMB8J30CAHE3_A/H suitable for automotive applications?
Yes, SMB8J30CAHE3_A/H is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliant, automotive-grade construction. It is explicitly listed in Vishay's ordering information as meeting automotive requirements, with validation for under-hood temperature cycling, humidity, and mechanical shock per AEC-Q101 test conditions.
What does the "CA" in SMB8J30CAHE3_A/H indicate?
The "CA" suffix in SMB8J30CAHE3_A/H denotes a bidirectional configuration - meaning the device clamps symmetrically for both positive and negative transients, with no polarity marking required. This distinguishes it from unidirectional variants (e.g., SMB8J30AHE3_A/H) that feature a cathode band and conduct only in reverse bias.
What is the standoff voltage (VWM) rating for SMB8J30CAHE3_A/H?
The standoff voltage (VWM) for SMB8J30CAHE3_A/H is 30 V - the maximum DC or continuous reverse working voltage the device can sustain without entering avalanche conduction. This value is specified in the "Bidirectional" electrical characteristics table and ensures compatibility with 24 V nominal automotive and industrial power systems.
Does SMB8J30CAHE3_A/H have a defined pinout or polarity marking?
No - SMB8J30CAHE3_A/H is a bidirectional TVS diode with symmetrical terminals and no polarity marking. The datasheet explicitly states "no marking on bidirectional types", and the pinout table confirms both terminals serve as interchangeable anode/cathode paths depending on transient polarity. PCB layout requires no orientation alignment.
SMB8J30CAHE3_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):
- 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_A/H FAQ
1.How can I place an order for SMB8J30CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHE3_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 SMB8J30CAHE3_A/H reliable?
The price and inventory of SMB8J30CAHE3_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 SMB8J30CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHE3_A/H?
SMB8J30CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHE3_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 SMB8J30CAHE3_A/H?
For technical support, including SMB8J30CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J30CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHE3_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 SMB8J30CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHE3_A/H?
All SMB8J30CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHE3_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 SMB8J30CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J30CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHE3_A/H Tags
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