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Vishay General Semiconductor - Diodes Division SMCJ22AHE3_A/H
- Part No.:
- SMCJ22AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHE3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
SMCJ22AHE3_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 (VWM), 24.4–26.9 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 μs waveform. It clamps transients to ≤35.5 V at 42.3 A peak current and operates across –55 °C to +150 °C junction temperature, commonly used to protect automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ22AHE3_A/H datasheet, SMCJ22AHE3_A/H pinout, SMCJ22AHE3_A/H application, or SMCJ22AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 μA max reverse leakage at 22 V, thermal resistance of 75 °C/W (junction-to-ambient), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device implements a silicon avalanche diode structure with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its low incremental surge resistance ensures stable clamping under repetitive surge conditions, while the MSL Level 1 rating supports lead-free reflow up to 260 °C peak without preconditioning.
The SMCJ22AHE3_A/H is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and its thermal design relies on copper pad area (8.0 mm × 8.0 mm per terminal) to sustain 6.5 W power dissipation at TA = 50 °C. Temperature coefficient of VBR is +0.096 %/°C, indicating predictable voltage drift over operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on before downstream IC damage. |
| VC @ IPPM | ≤35.5 V at 42.3 A - Clamped voltage during 1500 W transient; guarantees protected circuit sees <36 V stress. |
| PPPM | 1500 W - Peak pulse power handling at 10/1000 μs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| ID @ VWM | ≤1.0 μA - Reverse leakage at 22 V; negligible bias current impact on low-power sensor or communication circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive deployment without derating. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pads; informs board-level thermal management needs. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground plane; completes conduction path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives; critical for harsh-environment operation. |
| MSL Level 1 | Zero floor life limitation; can be mounted directly after unpacking without baking, reducing manufacturing overhead. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V or 5 V logic. |
| 1500 W peak pulse power | Supports single-event surge suppression per ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground, clamping surges within nanoseconds before IC input structures fail. Use Value: Enables compliance with ISO 16750-2 (12 V/24 V systems) and extends lifetime of AEC-Q100 qualified signal conditioning ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced transients from relay coils or motor drives. IC Role / Device Role / Timing Role: Standoff protection element on 24 V DC input channels, absorbing energy from inductive kickback without latch-up or degradation. Use Value: Eliminates need for external series impedance or RC snubbers, reducing BOM count and board space in DIN-rail mounted controllers. |
| Telecom Power Interface | Consumer Appliance Motor Control |
|
Use Scenario: Shielding PoE-powered Ethernet PHYs and DC-DC converters from lightning-induced surges entering via RJ45 jacks or AC/DC front-ends. IC Role / Device Role / Timing Role: Primary-level surge clamp on 48 V supply rail, coordinated with secondary-side TVS and common-mode chokes. Use Value: Maintains IEEE 802.3af/at compliance by limiting let-through voltage to <40 V during 10/1000 μs 1 kV surge tests. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine or HVAC fan control boards from brush-commutator noise and relay bounce. IC Role / Device Role / Timing Role: Localized clamping at motor driver IC inputs and feedback sensing nodes, preventing false triggering or latch-up. Use Value: Reduces field failure rate due to ESD events during service access and improves EMC test margin in CISPR 14-1 Class B environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22AHE3/A | Lower PPPM (400 W), SMA package (DO-214AC), same VWM/VBR range, higher RθJA (110 °C/W). | Restricted to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4. | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ22AHM3_A/H | Halogen-free variant with identical electrical specs, same AEC-Q101 qualification, and identical SMC package. | No functional difference; required only where halogen-free compliance is mandated by OEM or regional regulation. | Choose when RoHS + halogen-free material declaration is mandatory, e.g., for EU automotive Tier 1 supply chains. |
Compared with SMAJ22AHE3/A and SMCJ22AHM3_A/H, the SMCJ22AHE3_A/H delivers 3.75× higher surge power handling than the SMAJ series while maintaining AEC-Q101 qualification and identical mounting footprint-making it the preferred choice for high-reliability 24 V system protection where thermal and energy margins are critical.
Availability
SMCJ22AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power interfaces requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ22AHE3_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-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning surges is non-negotiable.
FAQ
What is the clamping voltage of SMCJ22AHE3_A/H at its rated peak pulse current?
The SMCJ22AHE3_A/H has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 42.3 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024. The clamping performance ensures downstream 24 V-rated ICs remain within safe operating limits during surge events. SMCJ22AHE3_A/H maintains this VC specification across its full operating temperature range.
Is SMCJ22AHE3_A/H qualified for automotive applications?
Yes, SMCJ22AHE3_A/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under "Mechanical Data" and "Ordering Information." This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22 standards. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction. SMCJ22AHE3_A/H is routinely deployed in automotive body control modules and sensor hubs where sustained reliability under thermal and electrical stress is required.
What is the thermal resistance of SMCJ22AHE3_A/H, and how does it affect PCB layout?
The SMCJ22AHE3_A/H 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, as specified in the "Thermal Characteristics" table. This value assumes minimum recommended pad layout per DO-214AB footprint. To maintain safe junction temperature under 6.5 W continuous dissipation, designers must allocate adequate copper area and avoid excessive trace length or isolation. SMCJ22AHE3_A/H thermal performance degrades significantly if pad size falls below the 8 mm² minimum per terminal.
How does the unidirectional configuration of SMCJ22AHE3_A/H impact its use in DC circuits?
The unidirectional configuration of SMCJ22AHE3_A/H means it functions as a polarity-sensitive clamp: it blocks reverse current up to 22 V (VWM) and conducts only when cathode voltage exceeds anode by ≥24.4 V. This makes it ideal for protecting positive-rail DC circuits (e.g., 24 V supply lines or sensor outputs), where it shunts surges to ground without interfering with normal forward-biased operation. SMCJ22AHE3_A/H must not be used on AC or bidirectional signal lines unless paired with complementary devices or replaced with a bidirectional variant like SMCJ22CA.
What packaging and reel options are available for SMCJ22AHE3_A/H?
SMCJ22AHE3_A/H is supplied in 7-inch plastic tape-and-reel format with 850 units per reel (package code "H"), as documented in the "Ordering Information" section of the Vishay datasheet. The part number suffix "_A/H" explicitly denotes this configuration. It is compatible with standard SMT pick-and-place equipment and meets J-STD-002 solderability requirements. No tube or tray options are listed for this specific variant; alternate formats require different suffixes (e.g., "_A/I" for 13-inch reels).
SMCJ22AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ22AHE3_A/H FAQ
1.How can I place an order for SMCJ22AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHE3_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 SMCJ22AHE3_A/H reliable?
The price and inventory of SMCJ22AHE3_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 SMCJ22AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ22AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHE3_A/H?
SMCJ22AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHE3_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 SMCJ22AHE3_A/H?
For technical support, including SMCJ22AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ22AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHE3_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 SMCJ22AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ22AHE3_A/H?
All SMCJ22AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHE3_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 SMCJ22AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ22AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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