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Vishay General Semiconductor - Diodes Division SMB8J30CA-M3/5B
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- Part No.:
- SMB8J30CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CA-M3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,796
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Product details
Overview
SMB8J30CA-M3/5B 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J30CA-M3/5B datasheet, SMB8J30CA-M3/5B pinout, SMB8J30CA-M3/5B application, or SMB8J30CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJL = 20 °C/W) for reliable operation up to +150 °C junction temperature.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping across both polarities without polarity sensitivity, supporting robust protection of differential buses like CAN FD and RS-485.
Rated for 1000 W unidirectional and 800 W bidirectional peak pulse power, SMB8J30CA-M3/5B operates within -55 °C to +150 °C junction range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It delivers 1.0 µA max reverse leakage at 30 V and 48.4 V clamping under 16.5 A surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 33.3 V / 36.8 V - breakdown voltage range at 1.0 mA test current, defining turn-on threshold |
| VC @ IPPM | 48.4 V - clamping voltage at 16.5 A peak pulse current, limiting downstream voltage stress |
| PPPM | 800 W - peak pulse power handling with 10/1000 µs waveform, enabling IEC 61000-4-5 Level 4 compliance |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - maximum junction temperature, supporting under-hood automotive deployment |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance, enabling efficient heat dissipation into PCB copper |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical bidirectional clamping function; no cathode band or polarity marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for Tier-1 automotive and industrial OEMs |
| Low incremental surge resistance | Enables tighter clamping (48.4 V at 16.5 A) versus competitive TVS diodes with higher dynamic impedance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| Glass-passivated junction | Ensures stable electrical parameters and long-term reliability under thermal cycling and humidity stress |
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 vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Limits transient voltage to ≤48.4 V during 16.5 A surges, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers against induced surges from motor contactors and solenoid switching. IC Role / Device Role / Timing Role: Standoff-rated (30 V) TVS deployed across isolated 24 V DC I/O lines to absorb repetitive 800 W transients without degradation. Use Value: Maintains <1.0 µA leakage at 30 V, preventing false triggering in high-impedance sensing circuits while surviving >1000 surges. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul modules from lightning-induced common-mode transients on twisted-pair cabling. IC Role / Device Role / Timing Role: Symmetrical bidirectional clamp placed differential-mode across A/B lines to suppress ±48.4 V spikes without disrupting DC bias. Use Value: Delivers sub-1 ns response and 20 °C/W junction-to-lead thermal resistance, enabling sustained operation in sealed outdoor enclosures. |
Use Scenario: Adding secondary-level surge immunity to USB-C and barrel-jack inputs in smart home hubs and set-top boxes exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS mounted adjacent to input rectifier to clamp fast-rising HBM/CDM events before bulk capacitance. Use Value: Halogen-free M3 construction satisfies regional eco-regulations while maintaining 800 W pulse rating for IEC 61000-4-2 Level 4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J30CA-E3/5B | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial-grade industrial designs where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement; identical footprint and performance |
| SMAJ30CA-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC ratings | Suitable for space-constrained consumer electronics with lower surge exposure | Choose for compact layouts where 800 W rating is excessive; verify thermal derating due to higher RθJA |
Compared with SMB8J30CA-M3/5B, SMB8J30CA-E3/5B offers identical protection performance without halogen-free assurance, while SMAJ30CA-M3 reduces surge capacity by 50 % and increases thermal resistance - making SMB8J30CA-M3/5B optimal for automotive and high-reliability industrial use cases demanding full 800 W rating and AEC-Q101 traceability.
Availability
SMB8J30CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter ESD protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J30CA-M3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
SMB8J30CA-M3/5B belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom systems needing AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of SMB8J30CA-M3/5B at its rated peak pulse current?
The SMB8J30CA-M3/5B has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 16.5 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains protected below critical voltage thresholds. The SMB8J30CA-M3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J30CA-M3/5B suitable for automotive applications?
Yes, SMB8J30CA-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensors, and body electronics. Its halogen-free (M3) construction, -55 °C to +150 °C operating range, and MSL Level 1 rating meet stringent OEM requirements. The SMB8J30CA-M3/5B datasheet confirms qualification testing per AEC-Q101 Rev D.
How does the bidirectional configuration of SMB8J30CA-M3/5B affect its circuit placement?
The SMB8J30CA-M3/5B has no polarity marking and functions identically in either orientation, simplifying PCB layout for differential or AC-coupled lines like RS-485 or CAN. Unlike unidirectional TVS diodes, it requires no cathode alignment - enabling direct placement across signal pairs without concern for directionality. This symmetry is intrinsic to the SMB8J30CA-M3/5B device structure.
What is the thermal resistance from junction to lead (RθJL) for SMB8J30CA-M3/5B?
The SMB8J30CA-M3/5B has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard mounting conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the leads, supporting sustained surge handling in thermally constrained environments. RθJL is a key parameter specified in the SMB8J30CA-M3/5B thermal characteristics table.
Does SMB8J30CA-M3/5B meet industry surge immunity standards such as IEC 61000-4-5?
Yes, the SMB8J30CA-M3/5B's 800 W peak pulse power rating with 10/1000 µs waveform aligns with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kV line-to-line) when implemented with appropriate PCB layout - including minimum 0.2" x 0.2" copper pads per terminal. The SMB8J30CA-M3/5B datasheet references compliance with ANSI/IEEE C62.35, the foundational standard for TVS surge testing.
SMB8J30CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMB8J30CA-M3/5B FAQ
1.How can I place an order for SMB8J30CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CA-M3/5B 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 SMB8J30CA-M3/5B reliable?
The price and inventory of SMB8J30CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J30CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J30CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CA-M3/5B?
SMB8J30CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CA-M3/5B 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 SMB8J30CA-M3/5B?
For technical support, including SMB8J30CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CA-M3/5B requirements.
6.How does Aetrix verify that SMB8J30CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J30CA-M3/5B 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 SMB8J30CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J30CA-M3/5B?
All SMB8J30CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CA-M3/5B, 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 SMB8J30CA-M3/5B part is unused and in its original packaging.
Return procedure for SMB8J30CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CA-M3/5B Tags
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