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Vishay General Semiconductor - Diodes Division SMCJ22AHE3/57T
- Part No.:
- SMCJ22AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHE3/57T.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,449
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Product details
Overview
SMCJ22AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features 22 V stand-off voltage (VWM), 35.5 V maximum clamping voltage at 42.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ22AHE3/57T datasheet, SMCJ22AHE3/57T pinout, SMCJ22AHE3/57T application, or SMCJ22AHE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche breakdown when reverse voltage exceeds its 24.4–26.9 V breakdown range (VBR at 1 mA). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Designed for unidirectional protection only, it exhibits 1.0 µA max reverse leakage at 22 V (VWM), 3.5 V forward voltage at 100 A, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The cathode band denotes polarity, and terminals are matte tin-plated per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - ensures reliable avalanche initiation within defined tolerance |
| VC @ IPPM | 35.5 V at 42.3 A - clamping voltage limits downstream component stress during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized waveform |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance defines derating above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature supports operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line ground or low-side reference; carries full surge current during clamping |
| Cathode | Avalanche breakdown node / Clamping voltage reference | Connected to protected line input; defines VWM and VC thresholds; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| 1500 W peak pulse power | Withstands high-energy transients from load dump or ISO 7637-2 Pulse 5a without failure |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; compatible with high-volume SMT assembly |
| Glass passivated junction | Improves long-term stability and reduces parameter drift under thermal cycling |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground, triggered within nanoseconds of overvoltage event. Use Value: Limits rail voltage to ≤35.5 V during 1500 W surge, preventing damage to MCU power inputs and CAN transceivers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <50 pF) unidirectional clamp on 0–5 V or 4–20 mA signal paths. Use Value: Maintains signal integrity with <1.0 µA leakage at 22 V while suppressing ±15 kV contact ESD per IEC 61000-4-2. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding buck converter inputs against back-EMF spikes from relay switching or solenoid de-energization. IC Role / Device Role / Timing Role: Primary surge shunt on VIN rail upstream of controller IC, sized for 42.3 A peak current. Use Value: Absorbs 10/1000 µs transients without degradation, enabling robust 24 V industrial power supply designs. | Use Scenario: Protecting high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Clamp placed between gate and source to limit VGS excursion beyond safe threshold. Use Value: Prevents unintended turn-on or oxide breakdown with sub-ns response and 35.5 V clamping ceiling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22AHE3/A | Lower PPPM (400 W), same VWM and package; RθJA = 110 °C/W | Suitable for lower-energy transients; not rated for automotive load dump | Select when cost-sensitive consumer applications require basic ESD/inductive spike protection |
| SMCJ22CAHE3/57T | Bidirectional variant; identical VWM, VBR, and PPPM but symmetrical clamping in both polarities | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD) | Choose for bidirectional protection where reverse polarity surges must also be suppressed |
Compared with SMAJ22AHE3/A and SMCJ22CAHE3/57T, the SMCJ22AHE3/57T delivers 3.75× higher surge power handling and automotive qualification - making it the preferred choice for 12/24 V systems exposed to ISO 7637-2 or load dump events, while the bidirectional variant enables balanced protection on differential buses.
Availability
SMCJ22AHE3/57T is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and DC-DC converter input protection requiring stable component supply across production lifecycles.
Supply support for SMCJ22AHE3/57T 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 and automotive qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against load dump, ESD, and inductive switching is critical.
FAQ
What is the clamping voltage of SMCJ22AHE3/57T at its rated peak pulse current?
The SMCJ22AHE3/57T has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated 42.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C on 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMCJ22AHE3/57T suitable for automotive applications?
Yes, the SMCJ22AHE3/57T is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass passivated junctions, MSL Level 1 moisture sensitivity rating, and validation across temperature cycling, high-temperature reverse bias, and accelerated life testing - making it appropriate for engine control, body electronics, and ADAS subsystems.
What does the "HE3" suffix indicate in SMCJ22AHE3/57T?
The "HE3" suffix in SMCJ22AHE3/57T denotes RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this automotive-grade version from commercial variants (e.g., "E3") and confirms compliance with halogen-free material requirements, JESD201 Class 2 whisker resistance, and extended reliability testing per automotive standards.
How does SMCJ22AHE3/57T differ from bidirectional SMCJ22CAHE3/57T?
The SMCJ22AHE3/57T is unidirectional and protects only against reverse-polarity transients, with cathode marked by a band. In contrast, SMCJ22CAHE3/57T is bidirectional - offering symmetrical clamping for both positive and negative surges - and lacks polarity marking. Both share identical VWM, PPPM, and package, but differ in application scope and test configuration.
What is the thermal resistance and derating behavior of SMCJ22AHE3/57T?
The SMCJ22AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard PCB pads. Its peak pulse power must be linearly derated above TA = 25 °C per Figure 2 in the datasheet - e.g., at 85 °C ambient, PPPM drops to approximately 1050 W - ensuring safe operation within its +150 °C maximum junction temperature limit.
SMCJ22AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 42.3A
- 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)
SMCJ22AHE3/57T FAQ
1.How can I place an order for SMCJ22AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHE3/57T 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 SMCJ22AHE3/57T reliable?
The price and inventory of SMCJ22AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ22AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHE3/57T?
SMCJ22AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHE3/57T 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 SMCJ22AHE3/57T?
For technical support, including SMCJ22AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHE3/57T requirements.
6.How does Aetrix verify that SMCJ22AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHE3/57T 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 SMCJ22AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ22AHE3/57T?
All SMCJ22AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHE3/57T, 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 SMCJ22AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ22AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22AHE3/57T Tags
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