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Vishay General Semiconductor - Diodes Division SMCJ30C-E3/9AT
- Part No.:
- SMCJ30C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30C-E3/9AT.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,452
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Product details
Overview
SMCJ30C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection on signal and power lines. It features a 30 V stand-off voltage (VWM), 48.4 V clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ30C-E3/9AT datasheet, SMCJ30C-E3/9AT pinout, SMCJ30C-E3/9AT application, or SMCJ30C-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ30C-E3/9AT operates as a bi-directional avalanche diode, exhibiting symmetrical breakdown behavior in both polarities with minimum VBR of 33.3 V and maximum VBR of 36.8 V at 1.0 mA test current. Its low incremental surge resistance enables stable clamping under fast transients, while thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W support reliable power dissipation up to 6.5 W at TA = 50 °C.
Designed per ANSI/IEEE C62.35, it delivers sub-nanosecond response time and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is unmarked (per polarity convention for bi-directional types) and qualified to AEC-Q101 for automotive-grade reliability across -55 °C to +150 °C junction temperature range.
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 at 1.0 mA - Ensures predictable breakdown onset across production lot |
| VC @ IPPM | 48.4 V at 31.0 A - Limits protected circuit voltage during 10/1000 µs surge |
| PPPM | 1500 W - Withstands high-energy transients such as ISO 7637-2 Pulse 1/2a/5a |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance sensor paths |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial ambient environments |
| Package | DO-214AB (SMCJ) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint |
Pinout & Package
DO-214AB (SMCJ) package: molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals - either lead connects to protected line or ground |
| Case (body) | Non-electrical mechanical interface | Thermally conductive path to PCB copper; no electrical connection or isolation requirement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Glass passivated chip junction | Enhances long-term stability and moisture resistance in harsh environmental conditions |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking, reducing manufacturing complexity |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, load dump) |
| J-STD-201 Class 1A whisker resistance | Ensures mechanical reliability of matte tin terminations under thermal cycling 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: Bi-directional TVS clamp placed between signal line and chassis ground to limit transient voltage excursions. Use Value: Maintains signal fidelity below 48.4 V during 31.0 A surges, preventing latch-up or damage to downstream ASICs rated for ≤5.5 V logic. | Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector on front-end optocoupler input stage, absorbing energy before reaching isolation barrier. Use Value: 1500 W PPPM rating handles repetitive 10/1000 µs transients common in factory automation without degradation over 10⁵ events. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics and RS-485 transceivers from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Primary-level surge suppression ahead of secondary TVS arrays and common-mode chokes. Use Value: Symmetrical clamping ensures equal protection for differential pairs without polarity sensitivity, simplifying layout. | Use Scenario: Input-stage overvoltage protection in AC/DC adapters subjected to mains switching transients and capacitor discharge events. IC Role / Device Role / Timing Role: Fast-response shunt device across bulk capacitor input, diverting surge current away from bridge rectifier and controller IC. Use Value: 30 V VWM aligns with 24–28 V DC bus tolerances, while 48.4 V VC prevents overvoltage stress on 65 V-rated MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA-E3/61T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR/VC ratings | Not suitable for high-energy automotive load dump; limited to low-power signal lines | Select when board space is constrained and surge energy does not exceed 400 W |
| 1.5KE30CA | Through-hole DO-15 package, higher thermal mass but incompatible with SMT assembly | Requires wave solder or hand-solder process; unsuitable for high-volume automated production | Choose only for legacy through-hole designs or prototyping where rework tolerance is prioritized |
Compared with SMAJ30CA-E3/61T and 1.5KE30CA, the SMCJ30C-E3/9AT delivers 3.75× higher surge power handling in an SMT-compatible package with AEC-Q101 validation - making it the preferred choice for automotive and industrial applications demanding repeatable 1500 W transient immunity.
Availability
SMCJ30C-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply and full traceability.
Supply support for SMCJ30C-E3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability and performance in harsh environments.
The SMCJ series belongs to Vishay's TRANSZORB® transient voltage suppressor family, engineered specifically for high-energy, bi-directional surge protection in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of the SMCJ30C-E3/9AT under maximum rated surge current?
The SMCJ30C-E3/9AT has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 31.0 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe voltage limits during standardized surge events. The SMCJ30C-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ30C-E3/9AT suitable for automotive applications?
Yes, the SMCJ30C-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and infotainment systems. Its bi-directional architecture, 1500 W peak pulse power, and -55 °C to +150 °C operating range meet stringent requirements for under-hood and chassis-mounted electronics. The SMCJ30C-E3/9AT also complies with J-STD-020 MSL Level 1 for lead-free reflow processing.
How does the SMCJ30C-E3/9AT differ from uni-directional variants like SMCJ30A-E3/9AT?
The SMCJ30C-E3/9AT is bi-directional with symmetrical breakdown characteristics in both polarities and no cathode marking, whereas SMCJ30A-E3/9AT is uni-directional with a marked cathode band and forward voltage drop (VF = 3.5 V at 100 A). The SMCJ30C-E3/9AT supports AC-coupled or floating signal lines without polarity concerns, while SMCJ30A-E3/9AT is intended for DC-biased applications where reverse blocking is required.
What is the thermal resistance of the SMCJ30C-E3/9AT, and how does it affect layout design?
The SMCJ30C-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures, PCB layout must provide adequate copper area and minimize trace length between device terminals and thermal planes. The SMCJ30C-E3/9AT achieves full 6.5 W power dissipation only with proper thermal pad implementation.
Does the SMCJ30C-E3/9AT have RoHS and halogen-free compliance documentation?
Yes, the SMCJ30C-E3/9AT carries the E3 suffix indicating RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. Vishay certifies that all E3-suffix parts meet both material restrictions, and documentation is accessible via Vishay's official material category policy (doc?99912 and doc?91000). The SMCJ30C-E3/9AT is supplied in 13" tape-and-reel packaging with 3500 units per reel.
SMCJ30C-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ30C-E3/9AT FAQ
1.How can I place an order for SMCJ30C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30C-E3/9AT 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 SMCJ30C-E3/9AT reliable?
The price and inventory of SMCJ30C-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ30C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ30C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30C-E3/9AT?
SMCJ30C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30C-E3/9AT 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 SMCJ30C-E3/9AT?
For technical support, including SMCJ30C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ30C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ30C-E3/9AT 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 SMCJ30C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ30C-E3/9AT?
All SMCJ30C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30C-E3/9AT, 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 SMCJ30C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ30C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30C-E3/9AT Tags
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