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Vishay General Semiconductor - Diodes Division SMB8J30CAHE3_B/I
- Part No.:
- SMB8J30CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHE3_B/I.pdf
- Description:
- 800W,30V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,335
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Product details
Overview
SMB8J30CAHE3_B/I 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), 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_B/I datasheet, SMB8J30CAHE3_B/I pinout, SMB8J30CAHE3_B/I application, or SMB8J30CAHE3_B/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repeated surges.
Designed for bidirectional operation, SMB8J30CAHE3_B/I provides symmetrical clamping above and below ground without polarity sensitivity - critical for AC-coupled data lines, CAN bus stubs, and differential sensor outputs where reverse-voltage transients occur in both directions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - tight breakdown window ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 48.4 V at 16.5 A (10/1000 µs) - clamping voltage limits downstream IC stress to safe levels during 800 W surge. |
| PPPM | 800 W - peak power handling capability under standardized lightning-surge waveform; validated per ANSI/IEEE C62.35. |
| TJ max | +150 °C - enables reliable operation in under-hood automotive environments and industrial enclosures. |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance supports sustained surge dissipation without thermal runaway. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; matte tin-plated leads, MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Both terminals are electrically symmetric; no functional distinction - bidirectional conduction allows placement without orientation check. |
| Anode (Cathode) | Transient current entry point | Identical to opposite terminal; clamping occurs equally for positive or negative excursions beyond ±30 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| Glass passivated junction | Ensures long-term parameter stability and reduced parameter drift under thermal cycling and humidity exposure. |
| Low profile SMB package | Height ≤ 2.20 mm enables use in space-constrained PCB layouts while maintaining 800 W surge rating. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; compatible with high-volume automated assembly lines. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector interface to divert >1 kV transients before reaching signal conditioning circuitry. Use Value: Limits voltage excursion to ≤48.4 V during 16.5 A surge, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance to limit let-through energy. Use Value: Withstands repeated 800 W surges without degradation, supporting >100,000 actuation cycles in factory automation equipment. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Protecting RS-485 transceivers and Ethernet PHYs in base station backhaul units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor on differential pair, paired with common-mode chokes to meet IEC 61000-4-5 Level 3. Use Value: Bidirectional symmetry ensures equal clamping on both conductors, maintaining signal integrity during asymmetric surge events. | Use Scenario: Shielding MCU GPIOs and gate drivers in washing machine motor inverters from commutation spikes generated by BLDC motors. IC Role / Device Role / Timing Role: Localized clamp adjacent to motor driver IC, minimizing trace inductance to achieve sub-nanosecond response. Use Value: 20 °C/W junction-to-lead thermal resistance enables rapid heat transfer into PCB copper, preventing thermal failure during burst-mode operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J30CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is required for end-product environmental certification. | Choose SMB8J30CAHM3_B/I if EU EcoDesign or specific customer green-material mandates apply. |
| SMAJ30CA-E3/5B | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (90 °C/W), same VWM/VBR/VC. | Not suitable for high-reliability automotive or industrial surge duty; limited to consumer-grade 24 V systems with lower surge exposure. | Use SMAJ30CA-E3/5B only in cost-sensitive, non-automotive applications where 400 W rating suffices and board space is constrained. |
Compared with SMB8J30CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ30CA-E3/5B trades 50% peak power and thermal robustness for smaller footprint - making SMB8J30CAHE3_B/I the optimal choice for AEC-Q101–mandated, high-energy industrial and automotive deployments.
Availability
SMB8J30CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and appliance motor control circuits requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMB8J30CAHE3_B/I 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.
The SMB8JxxCA family targets high-energy transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance and robust surge immunity in automotive and industrial control systems.
FAQ
What is the clamping voltage of SMB8J30CAHE3_B/I at its rated peak pulse current?
The SMB8J30CAHE3_B/I has a maximum clamping voltage (VC) of 48.4 V at 16.5 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 48.4 V during an 800 W transient event - a critical parameter for protecting 3.3 V or 5 V logic interfaces connected to SMB8J30CAHE3_B/I.
Is SMB8J30CAHE3_B/I suitable for automotive applications?
Yes, SMB8J30CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge endurance - validated for deployment in engine control units, body electronics, and ADAS sensor modules where SMB8J30CAHE3_B/I provides certified transient immunity.
How does the bidirectional nature of SMB8J30CAHE3_B/I affect PCB layout?
The SMB8J30CAHE3_B/I has no polarity marking and functions identically for positive and negative transients, eliminating orientation constraints during placement. This simplifies PCB layout and automated assembly - unlike unidirectional TVS diodes, SMB8J30CAHE3_B/I can be placed without regard to cathode band direction, reducing placement errors and enabling symmetric routing on differential lines.
What is the thermal resistance from junction to lead (RθJL) for SMB8J30CAHE3_B/I?
The SMB8J30CAHE3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in the Vishay datasheet. This low value enables efficient heat transfer from the silicon die into the PCB copper via the SMB package leads - a key factor in sustaining repeated surge events without thermal degradation, especially when mounted on 5.0 mm × 5.0 mm copper pads as recommended.
Does SMB8J30CAHE3_B/I meet JEDEC moisture sensitivity level requirements?
Yes, SMB8J30CAHE3_B/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it has unlimited floor life and can undergo standard lead-free reflow profiles without pre-baking - a requirement for high-yield, high-volume SMT manufacturing where SMB8J30CAHE3_B/I is integrated into automotive and industrial PCBAs.
SMB8J30CAHE3_B/I 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:
- 30V
- Current - Peak Pulse (10/1000µs):
- 16.5A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- 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_B/I FAQ
1.How can I place an order for SMB8J30CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHE3_B/I 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_B/I reliable?
The price and inventory of SMB8J30CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J30CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHE3_B/I?
SMB8J30CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHE3_B/I 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_B/I?
For technical support, including SMB8J30CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J30CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHE3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHE3_B/I?
All SMB8J30CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHE3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for SMB8J30CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHE3_B/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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