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Vishay General Semiconductor - Diodes Division SMCJ20AHE3_A/I
- Part No.:
- SMCJ20AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ20AHE3_A/I.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,805
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Product details
Overview
SMCJ20AHE3_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 20 V standoff voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 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 power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ20AHE3_A/I datasheet, SMCJ20AHE3_A/I pinout, SMCJ20AHE3_A/I application, or SMCJ20AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, 32.4 V clamping performance at rated IPPM, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode that enters controlled breakdown above its VBR to shunt transient energy away from protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ps), while low incremental surge resistance enables effective clamping under high-current transients like ISO 7637-2 pulse 1/2a/5a.
The SMCJ20AHE3_A/I is rated for TJ = −55 °C to +150 °C operation, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable performance in under-hood automotive environments and industrial control cabinets without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - guaranteed avalanche initiation range for design margining |
| VC @ IPPM | 32.4 V at 46.3 A - clamped voltage during 1500 W transient, defining worst-case stress on downstream ICs |
| PPPM | 1500 W - peak surge power handling with 10/1000 μs waveform, per IEC 61000-4-5 Level 4 |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves battery life in always-on automotive modules |
| TJ max. | +150 °C - supports AEC-Q101 qualification and under-hood placement near ECUs |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ20AHE3_A/I uses the standard SMC (DO-214AB) package: 2-terminal, unidirectional configuration with cathode indicated by a band on the body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; defines current direction during clamping |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 24 V rail); conducts avalanche current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
| 1500 W peak pulse power | Withstands severe load dump and inductive switching surges common in 12 V/24 V vehicle systems |
| 32.4 V clamping at 46.3 A | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings during transients |
| Low leakage ≤1.0 μA | Minimizes standby power loss in always-on modules such as telematics and body control units |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V power input of engine control unit (ECU) against ISO 7637-2 load dump pulses up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO regulators. Use Value: Limits voltage seen by downstream 3.3 V/5 V regulators to ≤32.4 V, preventing latch-up or permanent damage during 12 V system load dump events. | Use Scenario: Safeguarding analog output line of pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: TVS connected across sensor's 4–20 mA loop output to suppress EFT bursts and ESD events. Use Value: Maintains signal integrity by clamping transients to <33 V while adding <0.5 pF capacitance - no impact on 1 kHz bandwidth analog signal. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Overvoltage protection on −48 V DC feed line in telecom base station power distribution board. IC Role / Device Role / Timing Role: Unidirectional TVS installed at PSE (power sourcing equipment) output to protect PoE midspan circuitry. Use Value: Absorbs 1500 W surges from lightning-induced coupling on long outdoor cable runs without degradation over 100,000 event cycles. | Use Scenario: Secondary-level surge suppression on VBUS line of USB-C port in smart home hub. IC Role / Device Role / Timing Role: TVS placed after primary fuse and upstream of USB PD controller to handle conducted transients from hot-plug events. Use Value: Clamps VBUS to 32.4 V during 8 kV contact ESD (IEC 61000-4-2), preventing reset or brownout of USB controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC20A-TB-E3 | Same VWM (20 V), lower PPPM (600 W), higher VC (34.0 V at 25 A) | Not AEC-Q101 qualified; intended for commercial-grade consumer electronics only | Select when cost sensitivity outweighs automotive qualification and surge margin requirements |
| 1.5SMC20A-Q | Identical electrical specs but non-AEC-Q101; RoHS-compliant with MSL Level 1 | Lacks automotive qualification documentation and test reports required for OEM Tier 1 submissions | Choose for industrial or telecom designs where AEC-Q101 is not mandated and traceability to Vishay HE3 suffix is unnecessary |
Compared with SAC20A-TB-E3 and 1.5SMC20A-Q, the SMCJ20AHE3_A/I provides verified AEC-Q101 compliance, 2.5× higher surge power rating, and tighter clamping (32.4 V vs. ≥34.0 V), making it the preferred choice for safety-critical automotive power domains requiring long-term field reliability.
Availability
SMCJ20AHE3_A/I is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed line surge suppression requiring stable component supply across multi-year production programs.
Supply support for SMCJ20AHE3_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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure tolerance and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMCJ20AHE3_A/I at its rated peak pulse current?
The SMCJ20AHE3_A/I has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 46.3 A, measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event and is confirmed in Vishay's datasheet Document Number 88394, page 2. The SMCJ20AHE3_A/I maintains this clamping performance across its operational junction temperature range of −55 °C to +150 °C.
Is SMCJ20AHE3_A/I qualified for automotive applications?
Yes, the SMCJ20AHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. It meets all stress tests defined in the AEC-Q101 standard including high-temperature reverse bias, temperature cycling, and ESD. This qualification is documented in Vishay's official datasheet and supported by Vishay's material categorization report (www.vishay.com/doc?99912). The SMCJ20AHE3_A/I is approved for use in engine control units, body electronics, and ADAS modules.
What is the standoff voltage and breakdown voltage range for SMCJ20AHE3_A/I?
The SMCJ20AHE3_A/I has a standoff voltage (VWM) of 20 V and a breakdown voltage (VBR) range of 22.2 V to 24.5 V at a test current (IT) of 1 mA. These values are specified in the Electrical Characteristics table on page 2 of Vishay's datasheet 88394. The minimum VBR ensures reliable turn-on before damaging overvoltage occurs, while the maximum VBR sets the upper bound for production lot variation - both critical for designing robust protection margins in the SMCJ20AHE3_A/I application.
Does SMCJ20AHE3_A/I have bidirectional capability?
No, the SMCJ20AHE3_A/I is a unidirectional TVS diode, as confirmed by its "A" suffix and absence of "CA" in the part number. Its polarity is marked by a cathode band, and it conducts only when the cathode is biased positively relative to the anode. Bidirectional variants (e.g., SMCJ20CA) exist in the same family but are distinct orderable parts with different marking and electrical symmetry. The SMCJ20AHE3_A/I must be oriented correctly in-circuit to protect against positive-going transients on grounded-return systems.
What package type and mounting specifications apply to SMCJ20AHE3_A/I?
The SMCJ20AHE3_A/I uses the SMC (DO-214AB) package: a 2-pin surface-mount outline measuring 7.75 mm × 6.22 mm with 2.06 mm height. It requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation, per Figure 2 in Vishay's datasheet 88394. The device is MSL Level 1 compliant with peak reflow temperature of 260 °C and features matte tin-plated leads solderable per J-STD-002. The SMCJ20AHE3_A/I is optimized for high-volume automated placement.
SMCJ20AHE3_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):
- 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)
SMCJ20AHE3_A/I FAQ
1.How can I place an order for SMCJ20AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ20AHE3_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 SMCJ20AHE3_A/I reliable?
The price and inventory of SMCJ20AHE3_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 SMCJ20AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ20AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ20AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ20AHE3_A/I?
SMCJ20AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ20AHE3_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 SMCJ20AHE3_A/I?
For technical support, including SMCJ20AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ20AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ20AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ20AHE3_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 SMCJ20AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ20AHE3_A/I?
All SMCJ20AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ20AHE3_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 SMCJ20AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ20AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ20AHE3_A/I Tags
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