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Vishay General Semiconductor - Diodes Division SMCJ22AHM3/H
- Part No.:
- SMCJ22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHM3/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,188
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Product details
Overview
SMCJ22AHM3/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 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 42.3 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 SMCJ22AHM3/H datasheet, SMCJ22AHM3/H pinout, SMCJ22AHM3/H application, or SMCJ22AHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, junction-to-lead thermal path, and halogen-free RoHS-compliant sourcing details critical for automotive-grade ESD/surge design validation.
Technical Context
The SMCJ22AHM3/H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (24.4–26.9 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of transient events such as load dump, ISO 7637-2 pulses, and EFT bursts without latch-up or degradation under repeated stress.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power handling while maintaining TJ ≤ 150 °C. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 35.5 V at 42.3 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure level |
| PPPM | 1500 W - peak pulse power rating; enables survival of high-energy transients like ISO 16750-2 Load Dump (up to 120 V, 400 ms) |
| RθJL | 15 °C/W - junction-to-lead thermal resistance; supports direct PCB copper pad conduction for thermal management without heatsink |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
SMCJ22AHM3/H uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode marked by a band on one end. The package has no internal complexity - terminals are electrically isolated except through the PN junction - and is optimized for high-current surge conduction via low-inductance leadframe construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-impedance return plane; carries full IPPM during clamping |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line (e.g., 24 V rail); voltage referenced to anode during transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS power domains |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-020; supports green manufacturing and end-of-life recycling requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD > 15 kV contact), improving protection margin for downstream ICs |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and standard reflow without baking; reduces production line handling overhead |
| Glass passivated junction | Provides stable leakage performance (ID ≤ 1 µA at VWM) and long-term reliability under thermal cycling and humidity stress |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of an automotive body control module against load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits voltage seen by downstream regulators to ≤35.5 V, preventing overvoltage damage while surviving ≥1000 surges at rated PPPM. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of a pressure sensor in factory automation equipment from EFT and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used across signal and return paths to suppress common-mode transients induced by nearby motor drives. Use Value: Maintains signal integrity with <1 µA leakage at 22 V, enabling sub-µA precision measurement while responding in <1 ns to 5 kV EFT bursts. |
| Telecom DC Power Feeding | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered network switches' 48 V DC input stage from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on main DC bus, coordinated with secondary GDT or MOV for staged energy absorption. Use Value: Handles 1500 W peak pulse without failure, reducing need for oversized secondary protectors and minimizing board space. | Use Scenario: Adding secondary-level surge immunity to USB-C power delivery circuits in portable medical monitors exposed to hospital-grade ESD events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line, selected for minimal impact on USB 2.0 signal integrity. Use Value: Clamps 8 kV contact ESD to <35.5 V within nanoseconds, preserving USB enumeration and preventing brownout resets in host controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for automotive load dump; limited to low-energy ESD and EFT in consumer ports | Select only for space-constrained non-automotive designs where 1500 W rating is unnecessary |
| SMCJ22AHE3_A/H | Same electrical specs and package, but RoHS-compliant commercial grade (not halogen-free or AEC-Q101 qualified) | Lacks automotive qualification and halogen-free compliance; restricted to industrial/commercial use | Choose when AEC-Q101 and halogen-free requirements are not mandated by end-customer specifications |
Compared with SMAJ22A-E3/57T and SMCJ22AHE3_A/H, the SMCJ22AHM3/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, and halogen-free construction - making it the only option among the three validated for under-hood automotive deployment with full regulatory traceability.
Availability
SMCJ22AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power feeding, and consumer USB-C PD protection requiring stable component supply and full AEC-Q101 documentation.
Supply support for SMCJ22AHM3/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, power efficiency, and automotive-grade qualification.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where sustained surge immunity and long-term stability are mandatory.
FAQ
What is the clamping voltage of the SMCJ22AHM3/H and how does it affect circuit protection?
The SMCJ22AHM3/H has a maximum clamping voltage (VC) of 35.5 V at 42.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the highest voltage imposed on the protected circuit during a surge event. For example, when used on a 24 V automotive rail, the SMCJ22AHM3/H ensures downstream components experience no more than 35.5 V - well below typical 40 V absolute maximum ratings of LDOs and microcontrollers. Its low VC directly improves system robustness against ISO 7637-2 Pulse 5a load dump events.
Is the SMCJ22AHM3/H qualified for automotive applications?
Yes, the SMCJ22AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified variants). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for engine control units, body electronics, and ADAS modules where reliability under thermal and mechanical stress is critical. The SMCJ22AHM3/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What is the meaning of the "HM3" and "/H" suffixes in SMCJ22AHM3/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 and IEC 61249-2-21 standards, while the "/H" denotes packaging in 7-inch plastic tape and reel (850 units per reel). This full ordering code - SMCJ22AHM3/H - identifies a specific AEC-Q101-qualified, halogen-free, surface-mount TVS diode supplied in standardized logistics format. The base part SMCJ22A defines electrical parameters; HM3 confirms material compliance; /H specifies reel size and quantity - all essential for procurement traceability and manufacturing line setup.
How does the thermal performance of SMCJ22AHM3/H compare to smaller packages like SMAJ?
The SMCJ22AHM3/H has a junction-to-lead thermal resistance (RθJL) of 15 °C/W, significantly lower than the ~30–40 °C/W typical of SMAJ-series devices in DO-214AC packages. This enables more efficient heat transfer from the silicon junction to the PCB copper pads, supporting higher surge repetition rates and longer duty cycles. When mounted on 8.0 mm × 8.0 mm copper pads per terminal, the SMCJ22AHM3/H maintains junction temperatures below 150 °C even after multiple 1500 W pulses - a capability not achievable with smaller-footprint alternatives under identical conditions.
Can SMCJ22AHM3/H be used in bidirectional configurations?
No, the SMCJ22AHM3/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and presence of cathode band marking. Its electrical characteristics - including forward voltage (~3.5 V at 100 A) and reverse leakage behavior - are defined only for reverse-biased operation. For bidirectional protection, Vishay offers the SMCJ22CA variant, which lacks polarity marking and exhibits symmetrical clamping in both directions. Using SMCJ22AHM3/H in a bidirectional arrangement would result in unintended forward conduction and potential failure during positive transients.
SMCJ22AHM3/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:
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ22AHM3/H FAQ
1.How can I place an order for SMCJ22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHM3/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 SMCJ22AHM3/H reliable?
The price and inventory of SMCJ22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHM3/H?
SMCJ22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHM3/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 SMCJ22AHM3/H?
For technical support, including SMCJ22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHM3/H requirements.
6.How does Aetrix verify that SMCJ22AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHM3/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 SMCJ22AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ22AHM3/H?
All SMCJ22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHM3/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 SMCJ22AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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