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Vishay General Semiconductor - Diodes Division SMCJ30AHE3_A/H
- Part No.:
- SMCJ30AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30AHE3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ30AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage at 31.0 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating - enabling reliable surge suppression in automotive power systems, industrial sensor interfaces, and telecom front-end circuits.
For engineers reviewing the SMCJ30AHE3_A/H datasheet, SMCJ30AHE3_A/H pinout, SMCJ30AHE3_A/H application, or SMCJ30AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, 0.099 %/°C temperature coefficient of breakdown voltage, and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC MO-212.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance to low-impedance state upon exceeding its reverse stand-off voltage (VWM = 30 V), limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown behavior and long-term reliability under repetitive surge stress.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients), with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - supporting operation up to TJ = +150 °C and enabling integration into thermally constrained automotive ECUs and industrial controllers without additional heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 3.3 V/5 V/12 V/24 V systems. |
| VBR min/max | 33.3 V / 36.8 V at IT = 1.0 mA - Verified breakdown threshold range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 48.4 V at 31.0 A (10/1000 µs) - Clamping voltage limits downstream IC stress during 1 kV/500 A surge events per ISO 7637-2 Pulse 5a. |
| PPPM | 1500 W - Peak transient energy handling capacity supports protection against lightning-induced surges in outdoor equipment. |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves battery life in always-on automotive modules and IoT edge sensors. |
| TJ max | +150 °C - Enables deployment in engine bay, powertrain, and industrial motor drive environments without derating. |
| Package | SMC (DO-214AB) - Standardized 7.75 mm × 6.22 mm footprint compatible with IPC-7351B land patterns and reflow profiles up to 260 °C peak. |
Pinout & Package
SMCJ30AHE3_A/H uses the SMC (DO-214AB) surface-mount package with two terminals: cathode (marked with band) and anode. The device is unidirectional and polarity-sensitive; incorrect orientation results in forward conduction instead of reverse clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VWM. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; must maintain low-inductance connection for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body control, and ADAS modules per stress test requirements. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, protecting sensitive gate drivers and CAN transceivers. |
| MSL Level 1 (260 °C peak) | Enables single-pass reflow soldering without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR over 1000+ surge cycles and prevents parameter drift in humid or high-bias environments. |
| Matte tin-plated leads | Complies with J-STD-002 and JESD 22-B102 for reliable solder joint formation and whisker resistance (JESD 201 Class 2). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control units (ECUs) against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and chassis ground, responding within <1 ns to limit voltage to ≤48.4 V. Use Value: Prevents latch-up or permanent damage to microcontrollers, voltage regulators, and LIN/CAN transceivers during vehicle-level transients. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules from EFT bursts and ESD coupling. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) clamping element on signal lines referenced to local ground, activated only during >33.3 V excursions. Use Value: Maintains signal integrity below 30 V nominal range while surviving 4 kV contact ESD per IEC 61000-4-2 without calibration drift. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment (e.g., IP cameras, access points) from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters, absorbing up to 1500 W for 1 ms. Use Value: Eliminates need for secondary MOV-based protection, reducing BOM count and board space in compact telecom enclosures. | Use Scenario: Adding robustness to USB Type-C VBUS lines in portable medical monitors and smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed directly at connector, with cathode to VBUS and anode to ground. Use Value: Withstands ≥15 kV air discharge without degradation, preserving USB 2.0/3.2 signal fidelity and preventing host controller reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for ISO 7637-2 Pulse 5a; limited to ESD/EFT-only protection in space-constrained consumer designs. | Select when board area is critical and surge energy is ≤400 W; verify thermal margin at full load. |
| SMCJ30CAHE3_A/H | Bidirectional variant; same VWM (30 V), VC (48.4 V), and PPPM (1500 W); no polarity marking | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD differential pairs); not usable on DC rails with defined polarity. | Choose for symmetric transient protection where line reversal or AC content exists; avoid on unidirectional DC supplies. |
Compared with SMAJ30AHE3/A and SMCJ30CAHE3_A/H, the SMCJ30AHE3_A/H delivers optimal balance of high-energy clamping, automotive qualification, and thermal performance in a standardized SMC footprint - making it the preferred choice for demanding DC rail protection where both surge robustness and reliability certification are mandatory.
Availability
SMCJ30AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 compliance and long-lifecycle support.
Supply support for SMCJ30AHE3_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-grade validation.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial control, and infrastructure equipment where failure modes must be mitigated without compromising size or manufacturability.
FAQ
What is the clamping voltage of SMCJ30AHE3_A/H at its rated peak pulse current?
The SMCJ30AHE3_A/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 31.0 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with specified mounting conditions (0.31" × 0.31" copper pads), and represents the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ30AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMCJ30AHE3_A/H qualified for automotive applications?
Yes, the SMCJ30AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88394 (Revision 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and surge robustness - validating its use in automotive powertrain, body electronics, and ADAS modules. The SMCJ30AHE3_A/H meets MSL Level 1 and supports lead-free reflow up to 260 °C, aligning with automotive manufacturing standards. Its 150 °C maximum junction temperature further supports under-hood deployment.
How does the SMCJ30AHE3_A/H differ from the bidirectional SMCJ30CAHE3_A/H?
The SMCJ30AHE3_A/H is unidirectional, with a marked cathode band and intended for DC rail protection where polarity is fixed; the SMCJ30CAHE3_A/H is bidirectional, lacking polarity marking and suitable for AC or differential signal lines like RS-485 or CAN. Both share identical VWM (30 V), VC (48.4 V), and PPPM (1500 W), but the unidirectional SMCJ30AHE3_A/H exhibits forward voltage drop (~3.5 V at 100 A) and reverse leakage of 1.0 µA, whereas the bidirectional version has symmetrical characteristics in both directions. Select SMCJ30AHE3_A/H for 12 V/24 V supply protection; choose SMCJ30CAHE3_A/H only when line reversal or AC content is present.
What is the thermal resistance of SMCJ30AHE3_A/H, and how does it affect PCB layout?
The SMCJ30AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on 0.31" × 0.31" copper pads per JEDEC standards. These values require PCB layouts with adequate copper area - minimum 8.0 mm × 8.0 mm per terminal - to sustain continuous power dissipation (6.5 W) and prevent thermal runaway during repeated surges. Reducing pad size increases RθJA, lowering allowable surge repetition rate; for high-duty-cycle applications, thermal vias to inner ground planes are recommended to maintain TJ ≤ 150 °C. The SMCJ30AHE3_A/H does not require external heatsinks under typical automotive or industrial duty cycles.
Can SMCJ30AHE3_A/H be used in place of SMAJ30AHE3/A in an existing design?
No, direct substitution of SMCJ30AHE3_A/H for SMAJ30AHE3/A is not recommended without layout and thermal review. While both share VWM = 30 V and similar VBR, the SMCJ30AHE3_A/H has 3.75× higher PPPM (1500 W vs. 400 W), larger SMC package (vs. SMA), and lower RθJA (75 vs. 110 °C/W). The increased size requires revised land pattern and stencil design; the higher surge capability may overload downstream fusing if not re-evaluated. The SMCJ30AHE3_A/H also draws more board area and alters parasitic inductance - potentially affecting clamping speed in ultra-fast ESD scenarios. Verify mechanical fit, thermal margin, and system-level surge coordination before replacement.
SMCJ30AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ30AHE3_A/H FAQ
1.How can I place an order for SMCJ30AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30AHE3_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 SMCJ30AHE3_A/H reliable?
The price and inventory of SMCJ30AHE3_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 SMCJ30AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ30AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30AHE3_A/H?
SMCJ30AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30AHE3_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 SMCJ30AHE3_A/H?
For technical support, including SMCJ30AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ30AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ30AHE3_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 SMCJ30AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ30AHE3_A/H?
All SMCJ30AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30AHE3_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 SMCJ30AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ30AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30AHE3_A/H Tags
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