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Vishay General Semiconductor - Diodes Division SMCJ30AHE3_A/I
- Part No.:
- SMCJ30AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30AHE3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,751
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Product details
Overview
SMCJ30AHE3_A/I 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 standoff voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 31 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ30AHE3_A/I datasheet, SMCJ30AHE3_A/I pinout, SMCJ30AHE3_A/I application, or SMCJ30AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, low clamping ratio (VC/VBR ≈ 1.39), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 30 V and rapidly transitions to low-impedance conduction above its 33.3 V minimum breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance (dynamic impedance < 0.5 Ω derived from ΔVC/ΔIPPM).
Thermal design relies on RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The device meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood applications requiring long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC rail margin |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 48.4 V at 31 A - clamping voltage limits downstream IC stress during 10/1000 μs transients |
| PPPM | 1500 W - peak surge power handling per single 10/1000 μs event on specified PCB pad layout |
| TJ max. | +150 °C - junction temperature limit enabling use in engine control units and motor drive power stages |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMCJ30AHE3_A/I uses the standard SMC (DO-214AB) package: two-terminal, unidirectional configuration with cathode indicated by a band on the body. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated PPPM performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or common return path; carries full surge current during clamping |
| Cathode | Protected line input | Connected to the line being protected (e.g., 24 V supply rail); marked with band per JEDEC DO-214AB |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior and low leakage (<1 μA at VWM) over 15-year field life |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Combination Wave (1.2/50 μs + 8/20 μs) without degradation |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis modules where failure modes must meet ASIL-B functional safety constraints |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard reflow profiles up to 260 °C peak |
| Matte tin-plated leads | Solderable per J-STD-002 and JESD 22-B102; supports lead-free assembly and passes JESD 201 Class 2 whisker test |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits voltage to ≤48.4 V during 31 A surges, preventing latch-up or gate oxide damage in downstream PMICs and CAN transceivers. | Use Scenario: Analog output lines (e.g., 4–20 mA current loop) in factory automation sensors subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance (≈150 pF typical) clamping diode mounted at connector entry point to shunt fast transients. Use Value: Maintains signal integrity by clamping sub-100 ns ESD events while adding <0.5 Ω dynamic impedance in conduction state. |
| DC-DC Converter Input Stage | Motor Drive Gate Driver Supply Rail |
Use Scenario: 48 V input stage of isolated buck converters in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Primary overvoltage protector upstream of active front-end controllers and input filter capacitors. Use Value: Absorbs repetitive 1500 W surges without derating, supporting >100,000 surge cycles per MIL-STD-883H Method 3015.7. | Use Scenario: 15 V isolated gate driver supply in 3-phase inverter modules subjected to Miller-induced dv/dt coupling. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamp protecting gate driver ICs from shoot-through-inducing overvoltage spikes. Use Value: Clamps within 1 ns to prevent false turn-on of IGBTs/MOSFETs, preserving system short-circuit withstand time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (48.4 V same but at lower IPPM = 8.3 A) | Not suitable for ISO 7637-2 Pulse 5a; limited to low-energy ESD and signal-line protection | Select when board space is constrained and surge energy is ≤400 W |
| SMCJ33AHE3_A/I | Higher VWM (33 V), VBR (36.7–40.6 V), and VC (53.3 V); identical PPPM (1500 W) and package | Better margin for 33 V nominal systems; slightly higher clamping voltage reduces protection level for 30 V-rated ICs | Select when protecting 33 V rails or when tighter VWM/VBR matching is required |
Compared with SMAJ30A-E3/57T, SMCJ30AHE3_A/I delivers 3.75× higher surge energy handling in the same mounting footprint class; versus SMCJ33AHE3_A/I, it provides lower clamping voltage for 30 V systems while maintaining identical thermal and mechanical robustness.
Availability
SMCJ30AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, and telecom power supplies requiring stable component supply with AEC-Q101 traceability and extended temperature operation.
Supply support for SMCJ30AHE3_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 performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is critical.
FAQ
What is the maximum clamping voltage of SMCJ30AHE3_A/I under standard test conditions?
The maximum clamping voltage (VC) of SMCJ30AHE3_A/I is 48.4 V, measured at a peak pulse current (IPPM) of 31 A using the 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and reflects the device's ability to limit transient overvoltage on protected circuits. SMCJ30AHE3_A/I achieves this with low dynamic impedance, ensuring minimal overshoot during fast-rising transients.
Is SMCJ30AHE3_A/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMCJ30AHE3_A/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 09-Jan-2024 (Document Number: 88394). It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev G. SMCJ30AHE3_A/I is approved for use in engine control units, body electronics, and ADAS power domains where automotive-grade reliability is mandatory.
What is the standoff voltage (VWM) and why is it critical for SMCJ30AHE3_A/I circuit design?
The standoff voltage (VWM) of SMCJ30AHE3_A/I is 30 V - the maximum DC or continuous reverse voltage the device can block without exceeding 1 μA leakage current. This parameter defines the upper limit of normal operating voltage on the protected line; exceeding VWM risks premature conduction and power loss. For SMCJ30AHE3_A/I, VWM = 30 V ensures compatibility with 24 V automotive systems and 28 V avionics rails while maintaining sufficient margin above nominal voltage to avoid nuisance triggering.
How does the SMC (DO-214AB) package of SMCJ30AHE3_A/I impact PCB layout and thermal performance?
The SMC (DO-214AB) package of SMCJ30AHE3_A/I requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power dissipation. Its RθJA = 75 °C/W and RθJL = 15 °C/W values mean thermal performance depends heavily on copper area and layer count. SMCJ30AHE3_A/I must be placed near ground planes with thermal vias to maintain TJ ≤ 150 °C during repeated surges - especially in enclosed enclosures with limited airflow.
Can SMCJ30AHE3_A/I be used in bidirectional configurations?
No, SMCJ30AHE3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMCJ30CA). Using SMCJ30AHE3_A/I in reverse-biased AC or floating applications will result in forward conduction and potential failure. For bidirectional protection at 30 V standoff, specify SMCJ30CAHE3_A/I - which has symmetric breakdown in both directions and no polarity marking.
SMCJ30AHE3_A/I 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/I FAQ
1.How can I place an order for SMCJ30AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30AHE3_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 SMCJ30AHE3_A/I reliable?
The price and inventory of SMCJ30AHE3_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 SMCJ30AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ30AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30AHE3_A/I?
SMCJ30AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30AHE3_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 SMCJ30AHE3_A/I?
For technical support, including SMCJ30AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ30AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ30AHE3_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 SMCJ30AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ30AHE3_A/I?
All SMCJ30AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30AHE3_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 SMCJ30AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ30AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30AHE3_A/I Tags
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