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Vishay General Semiconductor - Diodes Division SMCJ22CAHE3_A/I
- Part No.:
- SMCJ22CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAHE3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,806
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Product details
Overview
SMCJ22CAHE3_A/I 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 power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ22CAHE3_A/I datasheet, SMCJ22CAHE3_A/I pinout, SMCJ22CAHE3_A/I application, or SMCJ22CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22CAHE3_A/I operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both directions due to its bidirectional construction. Its breakdown voltage range is 24.4 V to 26.9 V at 1 mA test current, with temperature coefficient of VBR at +0.096 %/°C.
It meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports 1500 W surge handling under standardized 10/1000 µs transients, and exhibits low incremental surge resistance enabling fast response (<1 ns) to ESD and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - Confirmed bidirectional breakdown window; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 35.5 V at 42.3 A - Clamped voltage during full-rated 1500 W transient; protects downstream ICs rated ≤36 V absolute maximum. |
| PPPM | 1500 W - Peak pulse power rating with 10/1000 µs waveform; validated on 8.0 mm × 8.0 mm copper pads per JEDEC standards. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements when operating near PD = 6.5 W derated limit. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reverse-biased during clamping | Connected to protected line (e.g., CAN_H); no marking on bidirectional devices - symmetric terminals. |
| Cathode | Current exit terminal in forward bias; reverse-biased during clamping | Connected to reference rail (e.g., chassis ground); identical electrical behavior to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR over lifetime and high reliability in humid/harsh environments without passivation degradation. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic and microcontrollers. |
| MSL Level 1 rating | Supports standard SMT reflow profiles without baking or special handling - reduces manufacturing cost and risk. |
| UL 94 V-0 molding compound | Ensures flame-retardant encapsulation required for safety-critical industrial and transportation applications. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 24 V supply inputs in engine control units (ECUs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing up to 1500 W surges while holding line voltage ≤35.5 V. Use Value: Prevents latch-up or destruction of PMICs and microcontrollers during alternator load dump events. |
Use Scenario: ESD and surge protection on analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed directly at connector interface. Use Value: Maintains signal integrity by limiting transients to <35.5 V, avoiding ADC saturation or op-amp damage. |
| Telecom Power Feeds | Consumer Appliance Motor Drivers |
|
Use Scenario: Overvoltage protection on PoE-powered Ethernet switch ports exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail upstream of DC/DC converters. Use Value: Withstands repeated 10/1000 µs transients up to 1500 W without parameter drift or failure. |
Use Scenario: Protection of gate drivers and MCU I/O in washing machine motor control boards subjected to inductive kickback. IC Role / Device Role / Timing Role: Clamp device across H-bridge supply rails to suppress VDS spikes. Use Value: Enables use of lower-voltage MOSFETs by limiting rail voltage excursions to 35.5 V during switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA-E3/61 | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients; not AEC-Q101 qualified | Select when space-constrained and surge energy ≤400 W; avoid in automotive or industrial mains-connected designs. |
| SMCJ22AHE3_A/I | Unidirectional variant; same VWM, VC, PPPM, but asymmetric clamping (cathode-marked) | Requires polarity-aware layout; unsuitable for AC-coupled or differential bus lines (e.g., CAN, RS-485) | Choose only for DC rails where polarity is fixed and reverse conduction must be blocked. |
Compared with SMAJ22CA-E3/61 and SMCJ22AHE3_A/I, the SMCJ22CAHE3_A/I uniquely combines 1500 W surge capability, bidirectional symmetry, AEC-Q101 qualification, and SMC package thermal performance - making it the preferred choice for high-reliability 24 V system protection.
Availability
SMCJ22CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeds, and consumer appliance motor controllers requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ22CAHE3_A/I 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 targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ22CAHE3_A/I under full-rated surge conditions?
The SMCJ22CAHE3_A/I clamps to a maximum of 35.5 V when subjected to its rated 42.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards on 8.0 mm × 8.0 mm copper pads and ensures downstream components with ≤36 V absolute maximum ratings remain within safe operating limits during transient events.
Is SMCJ22CAHE3_A/I suitable for automotive applications?
Yes, SMCJ22CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it appropriate for engine control units, body electronics, and ADAS modules where field reliability is critical.
How does the bidirectional design of SMCJ22CAHE3_A/I affect PCB layout?
The SMCJ22CAHE3_A/I has no polarity marking and identical electrical behavior in both directions, simplifying layout for AC-coupled or differential signal lines like CAN, RS-485, or audio paths. Unlike unidirectional variants, it eliminates orientation errors during automated placement and avoids the need for series diodes or external biasing networks.
What is the thermal resistance of SMCJ22CAHE3_A/I, and how does it impact power dissipation?
The SMCJ22CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard JEDEC test conditions. At ambient temperatures above 50 °C, its 6.5 W steady-state power dissipation must be derated linearly - for example, at TA = 80 °C, maximum continuous power drops to ~4.5 W to maintain TJ ≤ 150 °C.
Does SMCJ22CAHE3_A/I meet UL safety certification requirements?
Yes, SMCJ22CAHE3_A/I carries Underwriters Laboratories recognition under UL 497B (file E136766) for protector classification, and its SMC package uses UL 94 V-0 rated molding compound. These certifications validate its use in safety-critical end equipment requiring recognized surge protection components.
SMCJ22CAHE3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for SMCJ22CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAHE3_A/I 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_A/I reliable?
The price and inventory of SMCJ22CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ22CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAHE3_A/I?
SMCJ22CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAHE3_A/I 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_A/I?
For technical support, including SMCJ22CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ22CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ22CAHE3_A/I?
All SMCJ22CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for SMCJ22CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CAHE3_A/I Tags
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