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Vishay General Semiconductor - Diodes Division SMCJ20AHE3_A/H
- Part No.:
- SMCJ20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ20AHE3_A/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
SMCJ20AHE3_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 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, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs, industrial sensor interfaces, and DC-DC converter outputs.
For engineers reviewing the SMCJ20AHE3_A/H datasheet, SMCJ20AHE3_A/H pinout, SMCJ20AHE3_A/H application, or SMCJ20AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), 1.0 µA max reverse leakage at VWM, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on standard 8 mm × 8 mm copper pads.
Technical Context
The SMCJ20AHE3_A/H operates as a silicon avalanche diode that enters controlled breakdown above VBR to shunt transient energy away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges per IEC 61000-4-2/4-5.
Designed for unidirectional DC protection, it conducts only in reverse bias during overvoltage events and blocks up to 20 V in normal operation. The device is rated for TJ = −55 °C to +150 °C, meets MSL Level 1 per J-STD-020, and supports reflow soldering with peak temperature up to 260 °C.
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 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 32.4 V at 46.3 A - Limits downstream voltage stress during 1500 W transients |
| PPPM | 1500 W - Withstands high-energy surges (10/1000 µs) without failure |
| ID @ VWM | ≤1.0 µA - Negligible leakage current preserves efficiency in low-power circuits |
| TJ range | −55 °C to +150 °C - Supports under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - Standardized footprint compatible with automated placement and IPC-7351B land patterns |
Pinout & Package
SMCJ20AHE3_A/H uses the SMC (DO-214AB) surface-mount package: 7.11 mm × 6.22 mm × 2.62 mm body, matte tin-plated leads, cathode band marking on one end. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V input); band-marked end indicates cathode polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low clamping ratio | VC/VBR ≈ 1.42 - Minimizes voltage overshoot during surge events |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - No baking required prior to reflow |
| Glass passivated junction | Stable electrical parameters across lifetime and environmental stress |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 suffix adds halogen-free certification |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before LDOs or microcontrollers. Use Value: Withstands 1500 W pulses while limiting voltage to ≤32.4 V - preventing damage to 36 V-rated input stages. | Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable ESD and inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted across sensor output terminals to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response and <1 µA leakage preserve analog accuracy and long-term calibration stability. |
| DC-DC Converter Output Clamping | Telecom Line Interface Protection |
Use Scenario: Secondary-side 12 V output of isolated flyback converters powering FPGA I/O banks. IC Role / Device Role / Timing Role: TVS connected from output rail to GND to suppress ringing and cross-regulation spikes. Use Value: 32.4 V clamping ensures output stays within 13.2 V absolute maximum rating of 1.2 V core supplies. | Use Scenario: Low-voltage data lines (RS-485, CAN) in outdoor telecom cabinets vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC rail feeding transceivers to prevent latch-up during 1 kV/µs transients. Use Value: 1500 W rating handles multi-kA surge currents without degradation over >1000 events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Lower PPPM (400 W), smaller SMA package, higher RθJA (110 °C/W) | Suitable for space-constrained consumer electronics with lower surge exposure | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 3 |
| 1.5KE20A | Through-hole DO-201 package, same VWM/VC, but slower thermal recovery and no AEC-Q101 qualification | Used in legacy industrial power supplies where manual assembly remains cost-effective | Choose for prototyping or low-volume production where reflow compatibility is not required |
Compared with SMAJ20A-E3/57T and 1.5KE20A, the SMCJ20AHE3_A/H delivers 3.75× higher surge power handling, AEC-Q101 validation for automotive use, and optimized thermal performance for sustained SMT reliability - making it the preferred choice for high-reliability 24 V systems requiring field-deployed robustness.
Availability
SMCJ20AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply designs requiring stable component supply, long lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for SMCJ20AHE3_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, precision, and application-specific optimization.
The SMCJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom infrastructure - balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the clamping voltage of SMCJ20AHE3_A/H at its rated peak pulse current?
The SMCJ20AHE3_A/H has a maximum clamping voltage (VC) of 32.4 V at 46.3 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and guarantees that downstream components see no more than 32.4 V during worst-case transient events. The clamping performance is validated across the full operating temperature range and forms the basis for safe margining in 24 V system designs using the SMCJ20AHE3_A/H.
Is SMCJ20AHE3_A/H qualified for automotive applications?
Yes, the SMCJ20AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88394. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness - ensuring suitability for under-hood and chassis-mounted automotive modules. The SMCJ20AHE3_A/H meets the reliability requirements for powertrain, body control, and ADAS subsystems where transient immunity is critical.
How does the SMCJ20AHE3_A/H differ from bidirectional variants like SMCJ20CA?
The SMCJ20AHE3_A/H is unidirectional, meaning it conducts only in reverse bias and blocks forward current - ideal for DC rail protection with defined polarity. In contrast, SMCJ20CA is bidirectional and symmetric, conducting in both directions, making it suitable for AC lines or differential signals. The SMCJ20AHE3_A/H has a cathode band marking; SMCJ20CA has no polarity marking. Their VBR, VC, and PPPM values are identical, but circuit integration differs fundamentally due to polarity dependence.
What is the thermal resistance of SMCJ20AHE3_A/H, and how does it affect layout?
The SMCJ20AHE3_A/H 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. To achieve rated 1500 W pulse power, PCB layout must provide this minimum pad area - reducing RθJA improves surge survivability and steady-state power dissipation. Smaller pads increase junction temperature, derating both peak and average power capability. Layout guidelines are specified in Figure 2 of datasheet 88394 for the SMCJ20AHE3_A/H.
Can SMCJ20AHE3_A/H be used in place of SMAJ20A in an existing design?
No direct substitution is recommended without layout and thermal review. While both share VWM = 20 V and similar VC, the SMCJ20AHE3_A/H has 3.75× higher PPPM (1500 W vs. 400 W) and requires larger copper pads (8 mm × 8 mm vs. 3.5 mm × 3.5 mm for SMAJ). Using SMCJ20AHE3_A/H in an SMA footprint risks thermal overload and premature failure. The SMCJ20AHE3_A/H also offers AEC-Q101 qualification, which SMAJ20A lacks - a key distinction for automotive use cases.
SMCJ20AHE3_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):
- 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/H FAQ
1.How can I place an order for SMCJ20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ20AHE3_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 SMCJ20AHE3_A/H reliable?
The price and inventory of SMCJ20AHE3_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 SMCJ20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ20AHE3_A/H?
SMCJ20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ20AHE3_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 SMCJ20AHE3_A/H?
For technical support, including SMCJ20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ20AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ20AHE3_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 SMCJ20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ20AHE3_A/H?
All SMCJ20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ20AHE3_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 SMCJ20AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ20AHE3_A/H Tags
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