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Vishay General Semiconductor - Diodes Division SMCG22A-M3/9AT
- Part No.:
- SMCG22A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG22A-M3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,806
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Product details
Overview
SMCG22A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, with 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) rating. It protects sensitive MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power electronics.
For engineers reviewing the SMCG22A-M3/9AT datasheet, SMCG22A-M3/9AT pinout, SMCG22A-M3/9AT application, or SMCG22A-M3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and bidirectional variant compatibility for robust overvoltage protection design.
Technical Context
The SMCG22A-M3/9AT uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective clamping of 10/1000 μs waveform transients. Its unidirectional polarity features a cathode band marking and supports peak forward surge current (IFSM) up to 200 A (8.3 ms half-sine).
Designed for surface-mount automated placement, it meets J-STD-020 MSL Level 1 (260 °C reflow peak) and JESD 201 Class 2 whisker resistance. The DO-215AB package provides mechanical robustness with UL 94 V-0 molding compound and matte tin-plated leads.
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 - ensures reliable turn-on above normal operating voltage with margin |
| VC @ IPPM | 35.5 V at 42.3 A - clamping voltage limits downstream device stress during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| RθJA | 75 °C/W - thermal resistance determines junction temperature rise under 6.5 W steady-state dissipation |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded, 2-terminal configuration with 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad recommendation per terminal. Cathode marked by band on body; anode unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms full halogen-free material set meeting IEC 61249-2-21 and JEDEC J-STD-020 |
| Glass-passivated chip junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress |
| Low-profile DO-215AB package | Height ≤ 0.058" (1.47 mm) enables compact PCB layout in space-constrained modules |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns or baking requirements |
| 1500 W PPPM with 10/1000 μs waveform | Supports high-energy transient suppression in 12 V/24 V automotive power nets and industrial DC buses |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs, lighting drivers, and motor control inputs from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach downstream regulators or gate drivers. Use Value: Withstands 200 A IFSM and clamps to 35.5 V, preventing damage to 36 V-rated MOSFETs and 5 V logic interfaces. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) and digital sensor lines (CAN, LIN) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed at connector entry point to shunt fast transients without distorting signal integrity. Use Value: Sub-1 ns response ensures clamping occurs before sensitive ADC inputs or transceivers experience overstress. |
| Telecom DC Power Input | Consumer Appliance Motor Control |
Use Scenario: Safeguarding 48 V PoE-powered equipment and base station DC inputs against lightning-induced surges and AC line coupling. IC Role / Device Role / Timing Role: Primary-level TVS on input bulk capacitor rail, coordinated with upstream fuses and secondary-stage TVS arrays. Use Value: 1500 W PPPM and 75 °C/W RθJA allow sustained operation in sealed telecom enclosures up to +85 °C ambient. | Use Scenario: Protecting microcontroller GPIOs and half-bridge gate drivers in washing machine, HVAC, and power tool inverters. IC Role / Device Role / Timing Role: Point-of-load TVS on motor phase traces and controller supply rails to absorb commutation spikes. Use Value: AEC-Q101 qualification ensures reliability across 10,000+ thermal cycles typical of appliance field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Same VWM (22 V), lower PPPM (400 W), SMA (DO-214AC) package, non-AEC-Q101 | Lower surge capacity; suitable only for consumer-grade, non-automotive designs | Select if cost-sensitive and surge energy is limited to <400 W |
| SMCG22CA-M3/9AT | Bidirectional variant; same VWM (22 V), symmetric clamping in both polarities; identical package and AEC-Q101 rating | Required where AC-coupled or floating signal lines need protection against ± transients | Choose when protecting differential pairs, RS-485, or transformer-isolated interfaces |
Compared with SMAJ22A-E3/57T, SMCG22A-M3/9AT delivers 3.75× higher surge power handling and automotive qualification; versus SMCG22CA-M3/9AT, it offers optimized unidirectional clamping for DC power rails with tighter leakage control below VWM.
Availability
SMCG22A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom DC input surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SMCG22A-M3/9AT 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 performance.
The SMCG series was developed for high-energy transient suppression in harsh environments, targeting AEC-Q101-compliant automotive systems and industrial equipment demanding long-term stability under thermal and electrical stress.
FAQ
What is the clamping voltage of SMCG22A-M3/9AT at its rated peak pulse current?
The SMCG22A-M3/9AT has a maximum clamping voltage (VC) of 35.5 V at 42.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMCG22A-M3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG22A-M3/9AT qualified for automotive applications?
Yes, SMCG22A-M3/9AT is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. This qualification includes stress testing for high-temperature reverse bias, temperature cycling, and accelerated life testing under surge conditions. The M3 suffix further indicates halogen-free, RoHS-compliant construction required by many Tier 1 automotive suppliers. SMCG22A-M3/9AT is commonly used in engine control units, body electronics, and ADAS power supplies.
How does the SMCG22A-M3/9AT differ from the SMCG22CA-M3/9AT?
The SMCG22A-M3/9AT is unidirectional, while the SMCG22CA-M3/9AT is bidirectional - meaning the latter clamps transients of either polarity, whereas the former only clamps positive transients relative to ground. Both share identical VWM (22 V), package (DO-215AB), AEC-Q101 qualification, and M3 halogen-free compliance. The choice depends on circuit topology: SMCG22A-M3/9AT suits DC power rails; SMCG22CA-M3/9AT fits AC-coupled or floating signal paths like CAN or RS-485.
What is the thermal resistance of SMCG22A-M3/9AT, and how does it affect layout?
The SMCG22A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes the recommended pad layout; reducing pad area increases RθJA and risks exceeding the +150 °C maximum junction temperature under sustained 6.5 W dissipation. Layout must allocate sufficient copper area and avoid thermal isolation to ensure reliable long-term operation.
Can SMCG22A-M3/9AT be used in place of SMAJ22A in existing designs?
No direct drop-in replacement: although both have 22 V VWM, SMCG22A-M3/9AT uses the larger DO-215AB (SMCG) package versus SMAJ's DO-214AC (SMA), requiring PCB footprint revision. Additionally, SMCG22A-M3/9AT offers 1500 W PPPM (vs. 400 W for SMAJ22A) and AEC-Q101 qualification - advantages that demand layout validation for thermal and mechanical fit. Redesign is needed to leverage SMCG22A-M3/9AT's enhanced surge capability and automotive qualification.
SMCG22A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG22A-M3/9AT FAQ
1.How can I place an order for SMCG22A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG22A-M3/9AT 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 SMCG22A-M3/9AT reliable?
The price and inventory of SMCG22A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG22A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG22A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG22A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG22A-M3/9AT?
SMCG22A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG22A-M3/9AT 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 SMCG22A-M3/9AT?
For technical support, including SMCG22A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG22A-M3/9AT requirements.
6.How does Aetrix verify that SMCG22A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG22A-M3/9AT 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 SMCG22A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG22A-M3/9AT?
All SMCG22A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG22A-M3/9AT, 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 SMCG22A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG22A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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