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Vishay General Semiconductor - Diodes Division SMCJ22AHE3_A/I
- Part No.:
- SMCJ22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHE3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,022
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Product details
Overview
SMCJ22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 42.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power supply inputs, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the SMCJ22AHE3_A/I datasheet, SMCJ22AHE3_A/I pinout, SMCJ22AHE3_A/I application, or SMCJ22AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), 1.0 μA max reverse leakage at VWM, and compatibility with automated SMT assembly on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal conditions it presents high impedance (>1 MΩ) up to 22 V, then rapidly transitions to low-impedance conduction when transient voltage exceeds its 24.4–26.9 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
The device delivers 1500 W surge handling per 10/1000 μs waveform with 35.5 V clamping at 42.3 A, achieving a clamping ratio of 1.42 and thermal resistance of 75 °C/W (junction-to-ambient). It is rated for -55 °C to +150 °C operating junction temperature and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - maximum continuous reverse voltage before significant leakage; defines safe operating DC rail margin. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - precise voltage threshold triggering clamping action; tight 10% tolerance enables predictable protection onset. |
| VC (Clamping Voltage) | 35.5 V at IPPM = 42.3 A - maximum voltage seen by protected circuit during worst-case 1500 W transient; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity for 10/1000 μs surges; supports IEC 61000-4-5 Level 4 compliance when properly mounted. |
| ID (Reverse Leakage) | ≤1.0 μA at 22 V - negligible standby power loss and minimal impact on high-impedance sensor or reference circuits. |
| TJ max. | +150 °C - enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional operation | Connected to protected line; clamps positive transients to ground when voltage exceeds VBR. |
| Anode | Reference/ground connection point | Typically tied to system ground or low-impedance return path; completes clamping current loop during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and ADAS sensor modules. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR = 1.42), reducing voltage overshoot stress on downstream MOSFETs and microcontrollers. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 rating | Allows single-reflow soldering without baking; compatible with standard SMT production lines using 260 °C peak profile. |
| 1500 W peak pulse power | Supports protection against severe lightning-induced surges (IEC 61000-4-5) on 24 V industrial buses and CAN FD lines. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V/24 V battery-supplied ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between power rail and chassis ground to clamp transients before they reach LDOs and MCU power pins. Use Value: Clamps 1500 W surges to ≤35.5 V, preventing latch-up or gate oxide damage in automotive-grade microcontrollers and power management ICs. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional or unidirectional TVS across sensor output terminals to suppress fast-rising transients (<1 ns rise time) without affecting loop accuracy. Use Value: 1.0 μA leakage at 22 V avoids calibration drift; 35.5 V clamping protects precision op-amps and ADC front-ends from overstress. |
| Telecom Line Surge Protection | DC-DC Converter Input Protection |
|
Use Scenario: Ethernet PHY power rails (3.3 V, 5 V) and auxiliary bias supplies in PoE-powered switches vulnerable to induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input side of isolated DC-DC converters feeding PHY ICs and magnetics. Use Value: 1500 W rating handles multiple IEC 61000-4-5 surges; low thermal resistance (75 °C/W) sustains repeated event recovery without derating. |
Use Scenario: Input stage of 24 V → 5 V buck converters powering FPGA I/O banks in test equipment. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of input capacitor to absorb switch-node coupling and hot-swap inrush spikes. Use Value: Fast response time (<1 ns) limits voltage overshoot during MOSFET turn-on transients; RoHS-compliant HE3 suffix ensures compliance in export designs. |
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/I | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VBR/VC specs | Limited to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is limited to human-body-model ESD. |
| SMCJ22CAHE3_A/I | Bidirectional variant; identical VWM (22 V), VBR (24.4–26.9 V), VC (35.5 V), but symmetrical clamping in both polarities | Required for AC-coupled lines or bidirectional data buses (e.g., RS-485, CAN) where negative transients occur | Choose for full-duplex communication interfaces or systems with undefined signal polarity; not drop-in for unidirectional DC rails. |
Compared with SMAJ22AHE3_A/I, the SMCJ22AHE3_A/I provides 3.75× higher surge power handling and better thermal dissipation; versus SMCJ22CAHE3_A/I, it offers lower capacitance and simpler grounding in DC-only applications but cannot suppress negative-going transients.
Availability
SMCJ22AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and full traceability.
Supply support for SMCJ22AHE3_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 performance.
The SMCJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and qualification compliance are mandatory.
FAQ
What is the clamping voltage of the SMCJ22AHE3_A/I under maximum surge conditions?
The SMCJ22AHE3_A/I has a maximum clamping voltage (VC) of 35.5 V at 42.3 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during a full 1500 W transient event. The SMCJ22AHE3_A/I maintains this clamping performance across its specified operating temperature range (-55 °C to +150 °C), with minimal derating up to 125 °C.
Is the SMCJ22AHE3_A/I suitable for automotive applications?
Yes, the SMCJ22AHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC standards. The SMCJ22AHE3_A/I is commonly deployed in body control modules, infotainment power supplies, and ADAS camera ECU inputs where ISO 7637-2 load dump protection is required.
How does the SMCJ22AHE3_A/I differ from the bidirectional SMCJ22CAHE3_A/I?
The SMCJ22AHE3_A/I is unidirectional and clamps only positive transients relative to ground, while the SMCJ22CAHE3_A/I is bidirectional and clamps transients of either polarity. Both share identical VWM (22 V), VBR (24.4–26.9 V), and VC (35.5 V) values, but the SMCJ22CAHE3_A/I has no polarity marking and requires symmetric layout. The SMCJ22AHE3_A/I is preferred for DC power rails; the CA version suits AC-coupled or differential signal lines like CAN or RS-485.
What PCB layout guidance applies to the SMCJ22AHE3_A/I for optimal surge performance?
For rated 1500 W performance, the SMCJ22AHE3_A/I must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, per Vishay's datasheet Fig. 2 and Table "Maximum Ratings". Trace inductance must be minimized - keep leads short and wide, avoid vias in current path, and connect the anode directly to a solid ground plane. The SMCJ22AHE3_A/I thermal resistance drops from 75 °C/W (junction-to-air) to ~15 °C/W (junction-to-lead) with proper pad design, enabling reliable multi-pulse operation.
Does the SMCJ22AHE3_A/I meet RoHS and halogen-free requirements?
Yes, the SMCJ22AHE3_A/I carries the "HE3" suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. It uses matte tin-plated leads and molding compound meeting UL 94 V-0. While not halogen-free (that designation requires "HM3"), the SMCJ22AHE3_A/I satisfies EU RoHS Directive 2011/65/EU and is compliant with JEDEC J-STD-020 moisture sensitivity Level 1. Full material declarations are available under Vishay document #99912.
SMCJ22AHE3_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:
- 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/I FAQ
1.How can I place an order for SMCJ22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHE3_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 SMCJ22AHE3_A/I reliable?
The price and inventory of SMCJ22AHE3_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 SMCJ22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHE3_A/I?
SMCJ22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHE3_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 SMCJ22AHE3_A/I?
For technical support, including SMCJ22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHE3_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 SMCJ22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ22AHE3_A/I?
All SMCJ22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHE3_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 SMCJ22AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22AHE3_A/I Tags
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