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Vishay General Semiconductor - Diodes Division SMCJ22CAHM3_A/H
- Part No.:
- SMCJ22CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,154
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Product details
Overview
SMCJ22CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features 22 V standoff 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 automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the SMCJ22CAHM3_A/H datasheet, SMCJ22CAHM3_A/H pinout, SMCJ22CAHM3_A/H application, or SMCJ22CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both directions (VBR min/max = 24.4 V / 26.9 V 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 without affecting normal signal integrity.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The SMC package meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance, with matte tin-plated leads solderable per 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 |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - ensures predictable bidirectional breakdown threshold |
| VC @ IPPM | 35.5 V at 42.3 A - clamping voltage limits downstream IC stress during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy handling capacity under standardized waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal line integrity in high-impedance circuits |
| TJ max. | +150 °C - supports under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint |
Pinout & Package
SMCJ22CAHM3_A/H uses the standard SMC (DO-214AB) package: two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads compatible with lead-free reflow profiles (peak 260 °C, MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive or negative surges relative to cathode |
| Cathode | Transient return path (bidirectional) | Functions identically to anode in CA devices - no polarity distinction; both terminals serve as interchangeable surge shunt nodes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental standards and JEDEC J-STD-020 LF requirements |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs during surge events |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT assembly lines |
| UL 94 V-0 molding compound | Ensures flame retardancy in safety-critical industrial and automotive enclosures |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤35.5 V during 42.3 A surges, preventing latch-up or gate oxide damage in AEC-Q100 qualified receivers. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input lines feeding optocoupler or Schmitt-trigger front ends. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1.0 μA leakage to avoid false triggering in high-impedance sensing circuits. |
| Telecom Line Driver Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Shielding RS-485/RS-422 transceivers in base station backhaul equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired SMCJ22CAHM3_A/H units on differential pair lines referenced to chassis ground. Use Value: Symmetrical clamping ensures balanced protection without skewing signal timing; 35.5 V VC prevents receiver saturation during 10/1000 μs transients. | Use Scenario: Adding secondary-level surge immunity to USB-C PD adapter output rails exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-leakage TVS mounted directly at connector pins to shunt fast transients before reaching DC-DC controller. Use Value: 1.0 μA ID at 22 V VWM avoids loading regulated 20 V output; SMC package fits tight board space near Type-C port. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CAHE3_A/H | Lower PPPM (400 W), same VWM/VBR, SMA package (smaller thermal mass) | Not suitable for 1500 W surge events; limited to lower-energy ESD or localized noise | Select when board space is constrained and surge threat level is ≤400 W |
| SMCJ22AHE3_A/H | Unidirectional version; identical VWM/VBR/PPPM but asymmetric conduction | Requires correct polarity orientation; unsuitable for AC-coupled or floating differential lines | Choose only if circuit topology guarantees fixed DC bias and unidirectional surge direction |
Compared with SMAJ22CAHE3_A/H and SMCJ22AHE3_A/H, the SMCJ22CAHM3_A/H uniquely combines 1500 W bidirectional clamping, AEC-Q101 qualification, and halogen-free construction - making it the preferred choice for automotive and industrial systems requiring robust, polarity-agnostic surge immunity without layout redesign.
Availability
SMCJ22CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controllers, and telecom line driver designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ22CAHM3_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 and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments; its design prioritizes automotive-grade robustness, precise clamping control, and compatibility with automated manufacturing processes.
FAQ
What does the 'CA' suffix indicate in SMCJ22CAHM3_A/H?
The 'CA' suffix denotes a bidirectional configuration - meaning the SMCJ22CAHM3_A/H provides symmetrical transient voltage suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity applied across its terminals. This eliminates polarity concerns during PCB layout and enables use on AC-coupled or floating signal lines.
Is SMCJ22CAHM3_A/H qualified for automotive applications?
Yes, SMCJ22CAHM3_A/H carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification validates its reliability for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces subjected to temperature cycling, humidity, and mechanical shock.
What is the maximum clamping voltage of SMCJ22CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMCJ22CAHM3_A/H is 35.5 V at 42.3 A peak pulse current with a 10/1000 μs waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring protected ICs remain within safe operating voltage margins.
How does the SMC package of SMCJ22CAHM3_A/H support thermal management?
The SMC (DO-214AB) package of SMCJ22CAHM3_A/H delivers RθJL = 15 °C/W junction-to-lead thermal resistance and is designed for mounting on 8.0 mm × 8.0 mm copper pads per terminal. This layout enables efficient heat dissipation during repetitive surge events and sustains operation up to +150 °C junction temperature.
Can SMCJ22CAHM3_A/H replace unidirectional SMCJ22AHM3_A/H in existing designs?
No - while SMCJ22CAHM3_A/H shares identical electrical ratings with the unidirectional SMCJ22AHM3_A/H, its bidirectional nature means it lacks polarity marking and conducts equally in both directions. Substitution requires verification that the circuit does not rely on DC blocking or directional surge paths; incorrect replacement may cause unintended conduction in biased circuits.
SMCJ22CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ22CAHM3_A/H FAQ
1.How can I place an order for SMCJ22CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAHM3_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 SMCJ22CAHM3_A/H reliable?
The price and inventory of SMCJ22CAHM3_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 SMCJ22CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ22CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAHM3_A/H?
SMCJ22CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAHM3_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 SMCJ22CAHM3_A/H?
For technical support, including SMCJ22CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ22CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAHM3_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 SMCJ22CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ22CAHM3_A/H?
All SMCJ22CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAHM3_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 SMCJ22CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ22CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CAHM3_A/H Tags
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