My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ22AHE3/9AT
- Part No.:
- SMCJ22AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AHE3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,825
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ22AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W (10/1000 μs waveform), with a standoff voltage of 22 V, breakdown voltage range 24.4–26.9 V at 1 mA, and clamping voltage of 35.5 V at 42.3 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ22AHE3/9AT datasheet, SMCJ22AHE3/9AT pinout, SMCJ22AHE3/9AT application, or SMCJ22AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W peak pulse power rating, 35.5 V clamping voltage at rated surge current, and RoHS-compliant matte tin-plated leads suitable for automated placement on PCBs with 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22AHE3/9AT operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its breakdown range (24.4–26.9 V), then clamping transient energy to ≤35.5 V at 42.3 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at 22 V) and fast response time (<1 ns), critical for protecting sensitive downstream circuitry from inductive switching spikes.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive under-hood environments where thermal cycling and vibration resilience are essential.
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 IT = 1 mA - Confirmed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 35.5 V at 42.3 A - Clamped voltage during 1500 W transient, defining protection window for downstream ICs |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 μs waveform, validated on 8.0 mm × 8.0 mm copper pads |
| IPPM | 42.3 A - Maximum non-repetitive surge current the device safely conducts without degradation |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in under-hood automotive and industrial ambient conditions |
| Leakage ID | ≤1.0 μA at 22 V - Low reverse leakage preserves system standby power integrity |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; anode and cathode terminals defined per standard SMC orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return | Typically tied to system ground plane; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring reliability across -55 °C to +150 °C |
| Glass passivated junction | Ensures stable electrical parameters and long-term reliability under humidity and thermal stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision for sensitive logic interfaces |
| MSL Level 1 compliance | Enables direct placement without baking; compatible with standard reflow profiles peaking at 260 °C |
| RoHS-compliant & halogen-free option available | Meets global environmental regulations; HE3 suffix denotes RoHS-compliant AEC-Q101 grade |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in vehicle lighting modules and HVAC actuators from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on main power input before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤35.5 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic and power FETs. | Use Scenario: Safeguarding gate drivers and current-sense amplifiers in variable-frequency drives exposed to motor coil flyback energy. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed across motor phase outputs and control signal lines to absorb commutation spikes. Use Value: Sub-1 ns response and 35.5 V clamping protect isolated gate drivers (e.g., Si823x) from destructive overvoltage exceeding their absolute maximum ratings. |
| Telecom Power Interface | Consumer Sensor Signal Line Protection |
Use Scenario: Shielding PoE-powered Ethernet switch ports and base station DC inputs from lightning-induced surges and ESD events. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail, coordinated with secondary-stage MOVs and GDTs in multi-stage protection architecture. Use Value: 1500 W rating handles high-energy surges while low leakage (<1 μA) avoids loading the 48 V bias network during normal operation. | Use Scenario: Securing analog output lines of automotive cabin temperature and pressure sensors connected to ADC inputs of body control modules. IC Role / Device Role / Timing Role: Localized unidirectional clamp on each sensor's VOUT trace, referenced to MCU ground, suppressing ESD and cable discharge events. Use Value: 22 V standoff allows full-scale sensor signal swing (e.g., 0–5 V or 0–10 V) while clamping transients to safe levels below ADC input limits. |
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), smaller SMA package (DO-214AC), same VWM/VBR specs | Not suitable for 1500 W surge environments; limited to lower-energy interfaces like USB or I²C | Select only if board space is constrained and surge threat level is ≤400 W |
| SMCJ22AHM3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free material composition | No functional difference; used where halogen-free compliance is mandated by OEM or regional regulation | Drop-in replacement when halogen-free requirement applies; same thermal and mechanical behavior |
Compared with SMAJ22AHE3/A, the SMCJ22AHE3/9AT delivers 3.75× higher surge power handling in a larger but thermally superior SMC package; versus SMCJ22AHM3/9AT, it offers identical protection performance with standard RoHS compliance instead of halogen-free formulation.
Availability
SMCJ22AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, telecom power interface, and consumer sensor signal line applications requiring stable component supply, AEC-Q101 validation, and 1500 W transient immunity.
Supply support for SMCJ22AHE3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments-designed to meet automotive, industrial, and telecom surge immunity standards including ISO 7637-2 and IEC 61000-4-5.
FAQ
What is the clamping voltage of the SMCJ22AHE3/9AT at its rated peak pulse current?
The SMCJ22AHE3/9AT has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 42.3 A, measured under the standardized 10/1000 μs waveform condition. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event and is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88394. The SMCJ22AHE3/9AT maintains this clamping performance across its qualified operating temperature range.
Is the SMCJ22AHE3/9AT AEC-Q101 qualified and what does that mean for automotive use?
Yes, the SMCJ22AHE3/9AT carries AEC-Q101 qualification, verified per the "HE3" suffix designation in Vishay's ordering nomenclature. This certification confirms the device has passed rigorous stress tests-including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-for use in automotive electronic systems. The SMCJ22AHE3/9AT is therefore approved for under-hood and chassis-mounted applications where reliability under thermal, vibrational, and electrical stress is mandatory.
What is the standoff voltage (VWM) and why is it important for selecting the SMCJ22AHE3/9AT?
The standoff voltage (VWM) of the SMCJ22AHE3/9AT is 22 V-the maximum continuous reverse voltage the device can block without entering conduction. This parameter ensures the SMCJ22AHE3/9AT remains non-conductive during normal operation of a 24 V nominal system, avoiding leakage-related power loss or false triggering. Selecting a VWM just above the system's maximum steady-state voltage (e.g., 22 V for 24 V rails) provides optimal margin between normal operation and transient clamping for the SMCJ22AHE3/9AT.
Does the SMCJ22AHE3/9AT have polarity markings and how is it mounted on the PCB?
Yes, the SMCJ22AHE3/9AT features a visible cathode band on the SMC (DO-214AB) package body, identifying the cathode terminal. During PCB layout, the banded end must be connected to the line being protected (e.g., 24 V rail), while the anode is routed to system ground. Mounting requires minimum 8.0 mm × 8.0 mm copper pads per terminal for thermal dissipation and surge current handling, as specified in Vishay's datasheet for the SMCJ22AHE3/9AT.
How does the SMCJ22AHE3/9AT differ from bidirectional versions like SMCJ22CA?
The SMCJ22AHE3/9AT is unidirectional and intended for DC circuits where polarity is fixed-its cathode band must be oriented toward the positive rail. In contrast, SMCJ22CA is bidirectional and symmetrical, suitable for AC or floating signal lines where voltage polarity reverses. The SMCJ22AHE3/9AT offers tighter leakage control (<1.0 μA at 22 V) and supports forward surge current (IFSM = 200 A), whereas SMCJ22CA does not conduct forward current and has higher leakage in both directions. These differences make the SMCJ22AHE3/9AT appropriate for 24 V automotive power rails, not AC data lines.
SMCJ22AHE3/9AT 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:
- 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)
SMCJ22AHE3/9AT FAQ
1.How can I place an order for SMCJ22AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AHE3/9AT 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 SMCJ22AHE3/9AT reliable?
The price and inventory of SMCJ22AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ22AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AHE3/9AT?
SMCJ22AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AHE3/9AT 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 SMCJ22AHE3/9AT?
For technical support, including SMCJ22AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ22AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ22AHE3/9AT 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 SMCJ22AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ22AHE3/9AT?
All SMCJ22AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AHE3/9AT, 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 SMCJ22AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ22AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22AHE3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
