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Vishay General Semiconductor - Diodes Division SMCJ22AHM3_A/H
- Part No.:
- SMCJ22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,390
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Product details
Overview
SMCJ22AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 22 V standoff voltage, 35.5 V clamping voltage at 42.3 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power rails.
For engineers reviewing the SMCJ22AHM3_A/H datasheet, SMCJ22AHM3_A/H pinout, SMCJ22AHM3_A/H application, or SMCJ22AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1500 W 10/1000 µs surge capability, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a clamping device triggered by reverse-biased avalanche breakdown above its 22 V stand-off voltage (VWM), delivering sub-nanosecond response to transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature and supports automotive-grade reliability via AEC-Q101 qualification under HM3 suffix.
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 - Confirmed breakdown voltage range ensuring reliable triggering margin |
| VC @ IPPM | 35.5 V at 42.3 A - Clamped voltage during 1500 W 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - Peak pulse power handling capacity for transient suppression compliance per IEC 61000-4-5 |
| RθJA | 75 °C/W - Thermal resistance defining junction-to-ambient temperature rise under 6.5 W steady-state dissipation |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with cathode band marking and 0.320" body length |
Pinout & Package
SMCJ22AHM3_A/H uses the SMC (DO-214AB) package: a 2-terminal surface-mount case with matte tin-plated leads, 0.320" (8.13 mm) maximum length, 0.246" (6.22 mm) maximum width, and cathode band marking on the unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; carries forward surge current up to 200 A (8.3 ms half-sine) |
| Cathode | Avalanche clamping terminal | Marked with band; referenced to system ground or higher-potential rail; defines polarity-sensitive placement in DC power paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU and global automotive supply chains (HM3 suffix) |
| Low incremental surge resistance | Enables tighter clamping performance and reduced let-through energy during fast transients |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking preconditioning |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and lifetime |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground, absorbing >1500 W surges within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤35.5 V, preventing latch-up or gate oxide damage. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) TVS connected between signal line and ground, preserving signal integrity up to 1 MHz. Use Value: Maintains <1 μA leakage at 22 V, avoiding measurement offset while clamping ±30 kV HBM ESD pulses. |
| DC Motor Drive Circuit Protection | Telecom Power Supply Input Protection |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in factory automation drives. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp flyback voltage spikes. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling robust protection without degradation after repeated switching events. | Use Scenario: Guarding 48 V telecom rectifier inputs against lightning-induced surges per IEC 61000-4-5 Level 4. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input bus, coordinated with MOVs and gas discharge tubes in multi-stage architecture. Use Value: Provides precise 22 V clamping threshold and 1500 W rating to ensure coordination with upstream overvoltage protection devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22AHE3_A/H | Lower 400 W PPPM, same VWM/VC, SMA package (smaller footprint, higher RθJA) | Not suitable for 1500 W surge environments; limited to low-energy signal-line protection | Select only when board space is constrained and surge threat level is ≤400 W |
| SMCJ22AHE3_A/H | Identical electrical specs but commercial-grade (non-AEC-Q101), E3 suffix instead of HM3 | Lacks automotive qualification; acceptable for industrial/commercial power supplies where AEC-Q101 not mandated | Choose for cost-sensitive non-automotive designs requiring identical clamping performance |
Compared with SMCJ22AHM3_A/H, SMAJ22AHE3_A/H offers smaller size but insufficient surge capacity for automotive load dump, while SMCJ22AHE3_A/H matches all electrical parameters but omits AEC-Q101 validation and halogen-free compliance required for Tier 1 automotive sourcing.
Availability
SMCJ22AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, telecom power systems, and sensor interface circuits requiring stable component supply with full traceability and lifecycle management.
Supply support for SMCJ22AHM3_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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against repetitive surges and long-term stability are critical design requirements.
FAQ
What does the 'HM3' suffix indicate in SMCJ22AHM3_A/H?
The HM3 suffix in SMCJ22AHM3_A/H denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker test requirements, and confirms AEC-Q101 qualification for automotive use. This distinguishes it from commercial-grade variants like SMCJ22AHE3_A/H and ensures compliance with stringent Tier 1 automotive supply chain mandates. The SMCJ22AHM3_A/H is fully validated for under-hood deployment.
Is SMCJ22AHM3_A/H unidirectional or bidirectional?
SMCJ22AHM3_A/H is a unidirectional TVS diode, indicated by the absence of 'CA' in its part number and confirmed by its cathode band marking. It conducts only in reverse bias during overvoltage events and blocks forward current up to 200 A (8.3 ms half-sine). Bidirectional versions such as SMCJ22CA require separate ordering and exhibit symmetrical clamping in both polarities.
What is the maximum clamping voltage of SMCJ22AHM3_A/H and under what test condition?
The maximum clamping voltage of SMCJ22AHM3_A/H is 35.5 V, measured at 42.3 A peak pulse current using a 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMCJ22AHM3_A/H maintains this clamping performance with minimal derating up to +150 °C junction temperature.
Can SMCJ22AHM3_A/H be used in place of SMCJ22AHE3_A/H?
Yes, SMCJ22AHM3_A/H can replace SMCJ22AHE3_A/H in most designs due to identical electrical specifications (VWM, VBR, VC, PPPM), but adds AEC-Q101 qualification and halogen-free compliance. However, the HM3 variant has slightly different packaging logistics (tape-and-reel orientation and reel size codes), so PCB assembly programming and feeder setup must be verified. The SMCJ22AHM3_A/H provides enhanced reliability assurance for automotive applications where the HE3 version is not certified.
What is the thermal resistance and how does it affect layout for SMCJ22AHM3_A/H?
The SMCJ22AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures below +150 °C during sustained 6.5 W dissipation, designers must provide adequate copper area and avoid thermal isolation. Layouts using smaller pads or internal layers only will increase RθJA, requiring derating of power handling-this applies directly to the SMCJ22AHM3_A/H's thermal performance in real-world assemblies.
SMCJ22AHM3_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):
- 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_A/H FAQ
1.How can I place an order for SMCJ22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHM3_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 SMCJ22AHM3_A/H reliable?
The price and inventory of SMCJ22AHM3_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 SMCJ22AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHM3_A/H?
SMCJ22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHM3_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 SMCJ22AHM3_A/H?
For technical support, including SMCJ22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHM3_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 SMCJ22AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ22AHM3_A/H?
All SMCJ22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHM3_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 SMCJ22AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22AHM3_A/H Tags
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