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Vishay General Semiconductor - Diodes Division SMCJ15HE3/9AT
- Part No.:
- SMCJ15HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15HE3/9AT.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,471
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Product details
Overview
SMCJ15HE3/9AT from Vishay is a uni-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 15 V stand-off voltage (VWM), 24.4 V clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and DC-DC converter inputs.
For engineers reviewing the SMCJ15HE3/9AT datasheet, SMCJ15HE3/9AT pinout, SMCJ15HE3/9AT application, or SMCJ15HE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant, whisker-tested (JESD 201 Class 2) lead finish - all critical for automotive-grade surge protection design-in.
Technical Context
The SMCJ15HE3/9AT operates as a silicon avalanche diode, clamping transients above its breakdown voltage (VBR min = 16.7 V, max = 18.5 V at 1 mA) by entering avalanche conduction. Its low incremental surge resistance ensures stable clamping under high-current surges, while the glass-passivated junction guarantees long-term reliability under repetitive stress.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 (J-STD-020) and supports automated placement. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - essential for under-hood automotive applications where thermal cycling and vibration are severe.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V automotive systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - precise avalanche initiation window; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 24.4 V at 61.5 A - clamped voltage during 10/1000 µs surge; protects downstream 3.3 V/5 V logic with sufficient headroom. |
| PPPM | 1500 W - peak transient energy handling capacity; sustains ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in engine control units and power converters with elevated ambient temps. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard PCB layout; informs heatsinking requirements for sustained surge duty cycles. |
| Leakage ID | 1.0 µA at VWM - ultra-low reverse leakage; avoids parasitic loading on high-impedance sensor bias networks. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected line's low-side (e.g., GND-referenced signal or return rail); completes clamping loop during positive transients. |
| Cathode | Avalanche conduction node / High-side connection | Connected to protected line's high-side (e.g., 12 V supply or signal line); conducts surge current into anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test conditions including HTOL, TC, UHAST, and mechanical shock - required for ECU, ADAS, and body electronics. |
| Glass passivated junction | Eliminates moisture ingress and electrochemical migration risks, ensuring >10-year field reliability in humid environments (e.g., under-dash modules). |
| Low incremental surge resistance | Minimizes VC rise under high di/dt surges (e.g., load dump), delivering tighter clamping than polymer-based TVS devices. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard lead-free SMT processes without baking. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and compressive stress - critical for long-life automotive connectors and solder joints. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary clamping device placed between battery rail and DC-DC input capacitor. Use Value: Limits transient voltage to ≤24.4 V, preventing damage to 36 V-rated input stages while surviving 1500 W surges. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in PLC I/O modules. IC Role / Device Role: Line-end TVS on twisted-pair or coaxial sensor cables before op-amp conditioning stage. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with <1.0 µA leakage, preserving signal integrity and offset accuracy. |
| DC-DC Converter Input Stage | Telecom Power Supply Protection |
Use Scenario: Safeguarding buck converter ICs (e.g., LM5085) against flyback spikes from relay coils and motor drivers. IC Role / Device Role: Uni-directional TVS placed across input bulk capacitor terminals. Use Value: Absorbs 61.5 A peak current with 24.4 V clamping, reducing stress on MOSFETs and gate drivers during fault events. |
Use Scenario: Protecting PoE-powered equipment front-ends from lightning-induced surges on Ethernet lines (IEC 61000-4-5). IC Role / Device Role: Secondary-level TVS on 48 V DC input after primary isolation transformer. Use Value: Handles 1500 W surges with 150 °C max junction temp, enabling compact designs without external heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR/VC specs. | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not ISO 7637-2 load dump. | Select when board space is constrained and surge energy is limited to ≤400 W. |
| SMCJ15AHE3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (no "E" in part number) and packaging traceability. | No functional difference; both meet same automotive reliability and thermal requirements. | Acceptable interchange if sourcing flexibility is needed; verify manufacturer lot traceability alignment with OEM requirements. |
Compared with SMAJ15A-E3/61T, SMCJ15HE3/9AT delivers 3.75× higher surge power handling and superior thermal performance for demanding automotive and industrial environments; versus SMCJ15AHE3/9AT, it offers identical protection capability with equivalent qualification - making it a direct specification-compliant choice for high-reliability programs.
Availability
SMCJ15HE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMCJ15HE3/9AT 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, low clamping ratio, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ15HE3/9AT under a 10/1000 µs surge?
The SMCJ15HE3/9AT clamps to a maximum of 24.4 V when subjected to its rated peak pulse current of 61.5 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 88394, page 2. The clamping voltage directly determines the maximum stress imposed on downstream circuitry during surge events.
Is the SMCJ15HE3/9AT qualified for automotive applications?
Yes, the SMCJ15HE3/9AT is explicitly AEC-Q101 qualified, as stated in the Vishay datasheet revision 11-Dec-12 (Document Number 88394, page 1). The HE3 suffix denotes compliance with AEC-Q101 stress testing, including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it suitable for engine control, body electronics, and ADAS subsystems.
What does the "HE3" suffix mean in SMCJ15HE3/9AT?
The "HE3" suffix in SMCJ15HE3/9AT indicates two key attributes: "H" signifies AEC-Q101 qualification, and "E3" denotes RoHS-compliant construction with matte tin plating meeting JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade "E3" variants and confirms suitability for automotive and high-reliability industrial deployments.
How does the SMCJ15HE3/9AT differ from the bi-directional SMCJ15CA variant?
The SMCJ15HE3/9AT is a uni-directional TVS diode with cathode band marking and forward voltage drop (~3.5 V at 100 A), intended for DC rail protection. In contrast, SMCJ15CA is bi-directional, lacks polarity marking, and clamps symmetrically in both directions - used for AC lines or differential signal pairs. Their VWM (15 V), VBR, and VC values differ slightly due to internal structure, so they are not interchangeable without circuit review.
What is the thermal resistance of the SMCJ15HE3/9AT, and how does it affect layout?
The SMCJ15HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, per datasheet page 3. This value requires adequate copper area and minimal thermal via impedance to maintain junction temperature below 150 °C during repeated surges; reducing pad size increases RθJA and risks thermal runaway under high-duty-cycle transients.
SMCJ15HE3/9AT 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 55.8A
- 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)
SMCJ15HE3/9AT FAQ
1.How can I place an order for SMCJ15HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15HE3/9AT 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 SMCJ15HE3/9AT reliable?
The price and inventory of SMCJ15HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ15HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15HE3/9AT?
SMCJ15HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15HE3/9AT 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 SMCJ15HE3/9AT?
For technical support, including SMCJ15HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15HE3/9AT requirements.
6.How does Aetrix verify that SMCJ15HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ15HE3/9AT 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 SMCJ15HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ15HE3/9AT?
All SMCJ15HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15HE3/9AT, 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 SMCJ15HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ15HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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