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Vishay General Semiconductor - Diodes Division SMCJ22CAHE3/9AT
- Part No.:
- SMCJ22CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAHE3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,804
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Product details
Overview
SMCJ22CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V standoff voltage (VWM), 35.5 V maximum clamping voltage (VC) at 42.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on automotive sensor signal lines, industrial I/O interfaces, and telecom power rails.
For engineers reviewing the SMCJ22CAHE3/9AT datasheet, SMCJ22CAHE3/9AT pinout, SMCJ22CAHE3/9AT application, or SMCJ22CAHE3/9AT equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), and bidirectional clamping behavior confirmed per ANSI/IEEE C62.35.
Technical Context
The SMCJ22CAHE3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown at 24.4–26.9 V (VBR, IT = 1 mA), with low incremental surge resistance and <1 ns response time to ESD and lightning-induced surges.
Designed for surface-mount automated placement, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), JEDEC whisker Class 2, and UL 94 V-0 flammability. The matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, supporting high-reliability automotive and industrial PCB assembly.
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 threshold ensuring reliable turn-on during transients |
| VC @ IPPM | 35.5 V at 42.3 A - Clamped voltage limiting stress on downstream ICs under 10/1000 µs surge |
| PPPM | 1500 W - Peak pulse power handling capability for IEC 61000-4-5 Level 4 compliance |
| TJ range | –55 °C to +150 °C - Full operational junction temperature range for under-hood automotive use |
| RθJA | 75 °C/W - Thermal resistance enabling 6.5 W steady-state dissipation on standard 8 mm × 8 mm copper pads |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H), cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - symmetrical clamping |
| Cathode | Transient return path (bidirectional) | Acts as anode during positive transients and cathode during negative transients - no physical marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in industrial equipment |
| Low RθJA (75 °C/W) | Reduces thermal derating impact in compact layouts with limited copper area |
| Glass passivated junction | Ensures long-term stability of VBR and leakage (<1 µA at VWM) across temperature and life cycle |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and ground, absorbing energy before it reaches the protected IC. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive microcontrollers and signal conditioners. | Use Scenario: Shielding digital input/output terminals of programmable logic controllers from field-induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across isolated I/O channels, shunting >1 kA surge currents away from optocouplers and level shifters. Use Value: Maintains functional safety integrity by clamping within 1 ns, preserving signal timing margins in 10 kHz+ switching applications. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding 24 V/48 V DC power feeds in VoIP gateways and base station backhaul units against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on bulk power input, coordinated with upstream fuses and secondary filtering. Use Value: Withstands 1500 W pulses without degradation, enabling compliance with GR-1089-CORE Section 4.5.2.2 surge requirements. | Use Scenario: Secondary-level protection on USB 2.0 data lines (D+/D−) in set-top boxes and smart displays exposed to human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp minimizing signal distortion while meeting IEC 61000-4-2 ±15 kV contact discharge. Use Value: Delivers sub-36 V clamping at 12 A (8/20 µs), preserving eye diagram integrity and USB 480 Mbps signaling fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3/57T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Reduced surge margin; suitable only for non-automotive, lower-energy environments | Select when board space is constrained and peak surge exposure is below IEC 61000-4-5 Level 3 |
| SMCJ22AHE3/9AT | Unidirectional version; includes cathode band marking and forward voltage (VF = 3.5 V @ 100 A) | Requires polarity-aware layout; not usable on AC or floating signals | Choose only for DC-biased rails where unidirectional clamping suffices and polarity is fixed |
Compared with SMBJ22CAHE3/57T and SMCJ22AHE3/9AT, the SMCJ22CAHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and true bidirectional symmetry - making it the sole option for automotive-grade, polarity-agnostic protection in space-constrained SMC footprints.
Availability
SMCJ22CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ22CAHE3/9AT 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-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMCJ22CAHE3/9AT at its rated peak pulse current?
The SMCJ22CAHE3/9AT has a maximum clamping voltage (VC) of 35.5 V at 42.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 35.5 V during worst-case surge events, protecting 3.3 V and 5 V logic interfaces. The SMCJ22CAHE3/9AT maintains this performance across its full operating temperature range.
Is SMCJ22CAHE3/9AT qualified for automotive applications?
Yes, the SMCJ22CAHE3/9AT carries AEC-Q101 qualification, confirmed in Vishay's official documentation (Document Number: 88394, Revision: 09-Jan-2024). This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock, validating its use in automotive powertrain, chassis, and ADAS subsystems. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction, distinguishing it from commercial-grade variants.
How does the bidirectional nature of SMCJ22CAHE3/9AT affect PCB layout?
The SMCJ22CAHE3/9AT has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional TVS diodes such as SMCJ22AHE3/9AT, it requires no cathode band alignment - simplifying layout, reducing assembly errors, and enabling use on AC-coupled, differential, or floating signal paths. Its SMC (DO-214AB) footprint remains identical regardless of directionality.
What is the thermal resistance of SMCJ22CAHE3/9AT, and how does it impact power derating?
The SMCJ22CAHE3/9AT 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. At 25 °C ambient, this allows 6.5 W steady-state dissipation; above 25 °C, power must be linearly derated - e.g., to ~4.5 W at 75 °C ambient. Derating curves are provided in Figure 2 of the official datasheet (Document Number: 88394).
Does SMCJ22CAHE3/9AT meet industry surge immunity standards?
Yes, the SMCJ22CAHE3/9AT supports compliance with IEC 61000-4-5 (surge immunity) up to Level 4 (4 kV line-to-earth) when used with appropriate coordination components (e.g., series impedance). Its 1500 W peak pulse power rating, fast response time (<1 ns), and low clamping ratio (VC/VWM ≈ 1.61) make it suitable for protecting circuits referenced in EN 55032, EN 55035, and ISO 16750-2. The SMCJ22CAHE3/9AT is also UL 497B recognized (QVGQ2).
SMCJ22CAHE3/9AT 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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ22CAHE3/9AT FAQ
1.How can I place an order for SMCJ22CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAHE3/9AT 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 SMCJ22CAHE3/9AT reliable?
The price and inventory of SMCJ22CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ22CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAHE3/9AT?
SMCJ22CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAHE3/9AT 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 SMCJ22CAHE3/9AT?
For technical support, including SMCJ22CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ22CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAHE3/9AT 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 SMCJ22CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ22CAHE3/9AT?
All SMCJ22CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAHE3/9AT, 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 SMCJ22CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ22CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CAHE3/9AT Tags
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