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Vishay General Semiconductor - Diodes Division SMB8J30CAHE3_A/I
- Part No.:
- SMB8J30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHE3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,595
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Product details
Overview
SMB8J30CAHE3_A/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 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 SMB8J30CAHE3_A/I datasheet, SMB8J30CAHE3_A/I pinout, SMB8J30CAHE3_A/I application, or SMB8J30CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J30CAHE3_A/I supports automotive-grade reliability under repeated surge stress. The 72 °C/W junction-to-ambient thermal resistance (RθJA) assumes standard 0.2" × 0.2" pad layout per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC signal swing margin. |
| VBR (min/max) | 33.3 V / 36.8 V at 1.0 mA - breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 48.4 V at 16.5 A - clamping voltage under 10/1000 µs surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPPM | 800 W - peak pulse power handling with 10/1000 µs waveform; defines single-event surge energy absorption capacity. |
| ID @ VWM | 1.0 µA - reverse leakage at rated stand-off voltage; ensures minimal signal loading in high-impedance circuits. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm × 3.94 mm footprint; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Two-terminal SMB (DO-214AA) package: unmarked body with no polarity identification for bidirectional operation; terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions; no cathode band marking required - simplifies PCB layout for AC/differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal path optimized via 0.2" × 0.2" copper pads per terminal for RθJL = 20 °C/W. |
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 stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; peak reflow temperature up to 260 °C supported. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices. |
| Halogen-free & RoHS-compliant | Meets automotive OEM material compliance requirements (Vishay HM3/HE3 suffix standard). |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD events in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal integrity below 48.4 V clamping level while surviving 800 W surges - enabling robust operation per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding 24 V PLC analog input channels against field-wiring induced transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary front-end TVS on each channel, mounted adjacent to terminal block to minimize inductance in surge path. Use Value: 30 V VWM aligns with 24 V nominal system rail; 1.0 µA leakage avoids measurement error in precision 16-bit ADC front-ends. |
| Consumer USB-C Port | Telecom Line Card |
Use Scenario: ESD and lightning-induced surge protection on USB-C CC and SBU lines in portable docking stations. IC Role / Device Role / Timing Role: Secondary-level TVS after integrated ESD array, handling higher-energy events that bypass on-die protection. Use Value: SMB package fits tight spacing near USB-C receptacle; bidirectional symmetry eliminates orientation concerns during assembly. |
Use Scenario: Overvoltage protection on POTS line interface circuits exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Standoff-clamp TVS in series with hybrid transformer primary, limiting common-mode transients to telecom ICs. Use Value: 48.4 V VC ensures protected components remain within absolute maximum ratings during GR-1089 Class A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J30CAHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification. | No difference in circuit performance or automotive suitability; selected where halogen-free materials are mandated. | Direct material-compliance alternative when RoHS + halogen-free requirement applies. |
| SMAJ30CAHE3_A/I | Same VWM/VC/PPPM but in smaller SMA (DO-214AC) package; RθJA = 85 °C/W vs. 72 °C/W. | Lower power derating above 25 °C ambient; less thermal margin in enclosed automotive modules. | Acceptable for space-constrained consumer designs where thermal load is light and ambient stays below 70 °C. |
Compared with SMB8J30CAHE3_A/I, the HE3-suffixed halogen-free variant offers identical protection performance and automotive qualification, while the SMAJ30CAHE3_A/I provides footprint reduction at the cost of thermal robustness - making SMB8J30CAHE3_A/I optimal for thermally demanding automotive and industrial deployments.
Availability
SMB8J30CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMB8J30CAHE3_A/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 application-specific optimization.
SMB8J30CAHE3_A/I belongs to Vishay's TRANSZORB® TVS family - engineered for high-power-density transient suppression in automotive, industrial, and communications systems where fast response and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMB8J30CAHE3_A/I under a 10/1000 µs surge?
The SMB8J30CAHE3_A/I exhibits a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 16.5 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB8J30CAHE3_A/I maintains this clamping performance across its qualified operating temperature range.
Is SMB8J30CAHE3_A/I suitable for automotive applications?
Yes, SMB8J30CAHE3_A/I is explicitly AEC-Q101 qualified and carries the HE3 automotive ordering suffix, confirming compliance with stress tests for temperature cycling, humidity, mechanical shock, and surge endurance. It is deployed in engine control units, body electronics, and ADAS sensor interfaces where bidirectional transient suppression and extended temperature operation (-55 °C to +150 °C) are required. The SMB8J30CAHE3_A/I meets ISO 7637-2 and ISO 16750-2 immunity requirements when applied per Vishay's recommended layout.
How does the SMB8J30CAHE3_A/I differ from unidirectional variants like SMB10J30AHE3_A/I?
The SMB8J30CAHE3_A/I is bidirectional with symmetrical clamping in both polarities, whereas SMB10J30AHE3_A/I is unidirectional and conducts only in reverse bias. SMB8J30CAHE3_A/I has lower peak pulse power (800 W vs. 1000 W) and slightly higher clamping voltage (48.4 V vs. 48.4 V same, but at lower IPPM), reflecting its dual-path design. Its marking code "1CK" and lack of cathode band distinguish it physically. The SMB8J30CAHE3_A/I is preferred for AC-coupled, differential, or polarity-agnostic protection points.
What is the thermal resistance of SMB8J30CAHE3_A/I, and how does it affect layout?
SMB8J30CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient resistance (RθJA) of 72 °C/W - measured on 0.2" × 0.2" copper pads per terminal. To achieve rated power dissipation, PCB layout must replicate this pad area and avoid thermal bottlenecks. Reducing pad size increases RθJA, derating peak pulse power per Figure 2 in the datasheet. The SMB8J30CAHE3_A/I's low RθJL enables efficient heat transfer into the board, supporting sustained operation in thermally dense automotive modules.
Does SMB8J30CAHE3_A/I require orientation during placement?
No - SMB8J30CAHE3_A/I is a bidirectional TVS diode with symmetrical electrical characteristics; its SMB (DO-214AA) package has no polarity marking or cathode band. This eliminates orientation errors during automated placement and simplifies routing for differential or AC signal paths. Unlike unidirectional variants such as SMB10J30AHE3_A/I, the SMB8J30CAHE3_A/I functions identically regardless of anode/cathode alignment on the PCB, reducing assembly complexity and inspection overhead.
SMB8J30CAHE3_A/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:
- 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/I FAQ
1.How can I place an order for SMB8J30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHE3_A/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_A/I reliable?
The price and inventory of SMB8J30CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHE3_A/I?
SMB8J30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHE3_A/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_A/I?
For technical support, including SMB8J30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHE3_A/I?
All SMB8J30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMB8J30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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