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Vishay General Semiconductor - Diodes Division SMCJ20CAHE3_A/I
- Part No.:
- SMCJ20CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ20CAHE3_A/I.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,882
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Product details
Overview
SMCJ20CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 20 V standoff voltage (VWM), 32.4 V clamping voltage (VC) at 46.3 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 SMCJ20CAHE3_A/I datasheet, SMCJ20CAHE3_A/I pinout, SMCJ20CAHE3_A/I application, or SMCJ20CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and RoHS-compliant matte tin terminations suitable for lead-free reflow.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream circuitry. Its bidirectional architecture ensures symmetrical clamping in both polarities, eliminating need for polarity-aware placement in AC-coupled or floating lines.
Designed for robustness under repetitive stress, it supports junction temperatures from –55 °C to +150 °C, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and exhibits low incremental surge resistance - critical for maintaining stable clamping under fast-rising ESD or lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 22.2 V / 24.5 V - breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 32.4 V - clamped voltage across device at 46.3 A peak pulse, limiting stress on protected ICs |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 μs waveform, enabling IEC 61000-4-5 Level 4 compliance |
| ID @ VWM | 1.0 μA - leakage current at 20 V, ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance, facilitating heat dissipation without external heatsink |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode side marking) | Surge return path (bidirectional) | No polarity marking on SMCJ20CAHE3_A/I; terminals are functionally symmetric for AC or floating-line protection |
| Anode (Cathode side marking) | Surge return path (bidirectional) | Identical electrical behavior to cathode terminal; bidirectional conduction eliminates orientation dependency during PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Glass passivated junction | Enhances reliability and stability of breakdown voltage over temperature and lifetime |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| MSL Level 1 rating | Enables standard SMT assembly without dry-pack or baking requirements |
| 1500 W peak pulse power | Supports protection against severe surges such as indirect lightning (IEC 61000-4-5 2 Ω/12 Ω coupling) |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping transients within 1 ns response time to prevent latch-up or gate oxide damage. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems up to 35 V) and meets AEC-Q101 stress requirements. | Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring surges and ground loop spikes in factory automation. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC I/O lines, absorbing energy from relay coil flyback and motor drive noise. Use Value: Enables >100,000 surge cycles at 1500 W without parameter drift, reducing field failure rates in harsh industrial environments. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Protecting Ethernet PHY front-end and PoE injectors from induced surges on unshielded twisted-pair cabling exposed to outdoor or building-entry environments. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pair or common-mode line-to-ground, suppressing common-mode transients while preserving signal bandwidth. Use Value: Clamps to ≤32.4 V within nanoseconds, preventing PHY IC damage during IEC 61000-4-5 4 kV tests. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers, guarding synchronous rectifiers and output capacitors from output short-circuit recovery spikes. IC Role / Device Role / Timing Role: Fast-acting shunt device across DC output rails, triggered by transient overvoltage exceeding 20 V standoff level. Use Value: Limits output rail excursion to 32.4 V during fault conditions, avoiding secondary-side MOSFET avalanche failure and improving safety certification margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CAHE3_A/I | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (100 °C/W) | Suitable only for lower-energy transients (IEC 61000-4-2 ±8 kV contact); not recommended for load dump or IEC 61000-4-5 | Select when board space is constrained and surge threat level is limited to ESD-only environments. |
| SMCJ20CAHM3_A/I | Halogen-free variant, identical electrical specs and AEC-Q101 qualification, same SMC package | No functional difference; used where halogen-free compliance is mandated by OEM or regional environmental regulations | Choose for automotive Tier 1 programs requiring halogen-free materials without compromising performance. |
Compared with SMCJ20CAHE3_A/I, SMAJ20CAHE3_A/I offers reduced surge capacity in a smaller footprint, while SMCJ20CAHM3_A/I provides identical protection with halogen-free construction - enabling direct material substitution where environmental compliance drives selection.
Availability
SMCJ20CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ20CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and industrial-grade performance.
The SMCJ series is engineered for high-power transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness against load dump, EFT, and lightning-induced surges is mandatory.
FAQ
What is the clamping voltage of SMCJ20CAHE3_A/I at its rated peak pulse current?
The SMCJ20CAHE3_A/I has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 46.3 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's Document Number 88394, page 2. The SMCJ20CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMCJ20CAHE3_A/I qualified for automotive use?
Yes, SMCJ20CAHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in the ordering information table (page 3) and thermal characteristics note (page 3) of Vishay's datasheet 88394. This qualification covers stress tests including high-temperature operating life, temperature cycling, and surge robustness - making the SMCJ20CAHE3_A/I suitable for under-hood and body-control module applications.
Does SMCJ20CAHE3_A/I have polarity markings on the package?
No, SMCJ20CAHE3_A/I does not have polarity markings because it is a bidirectional TVS diode. As stated in the mechanical data section (page 2), "no marking on bidirectional types." Both terminals are electrically symmetric, allowing unrestricted orientation during automated placement - a key advantage for differential signal lines and AC-coupled interfaces where polarity awareness would complicate layout.
What is the standoff voltage and leakage current specification for SMCJ20CAHE3_A/I?
The SMCJ20CAHE3_A/I has a standoff voltage (VWM) of 20 V and a maximum reverse leakage current (ID) of 1.0 μA at that voltage, per the Electrical Characteristics table (page 2) of Vishay's datasheet 88394. This low leakage ensures minimal impact on high-impedance sensor bias networks and battery-powered circuits, while the 20 V rating aligns with 12 V automotive and 24 V industrial nominal supply rails.
What package type and mounting specifications apply to SMCJ20CAHE3_A/I?
SMCJ20CAHE3_A/I uses the SMC (DO-214AB) package, with dimensions specified on page 5 of Vishay's datasheet 88394. It requires 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal for rated power dissipation, complies with MSL Level 1 (peak reflow 260 °C), and features matte tin-plated leads qualified to J-STD-002 and JESD 22-B102. The SMCJ20CAHE3_A/I is supplied in 13" tape-and-reel (I-pack) format.
SMCJ20CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- 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)
SMCJ20CAHE3_A/I FAQ
1.How can I place an order for SMCJ20CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ20CAHE3_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 SMCJ20CAHE3_A/I reliable?
The price and inventory of SMCJ20CAHE3_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 SMCJ20CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ20CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ20CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ20CAHE3_A/I?
SMCJ20CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ20CAHE3_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 SMCJ20CAHE3_A/I?
For technical support, including SMCJ20CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ20CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ20CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ20CAHE3_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 SMCJ20CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ20CAHE3_A/I?
All SMCJ20CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ20CAHE3_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 SMCJ20CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ20CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ20CAHE3_A/I Tags
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