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Vishay General Semiconductor - Diodes Division SMCG22A-E3/9AT
- Part No.:
- SMCG22A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG22A-E3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,961
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Product details
Overview
SMCG22A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 42.3 A peak pulse current (IPPM), and clamps to 35.5 V at rated surge. It is widely deployed in automotive powertrain control units to protect CAN transceiver inputs against load dump and inductive switching transients.
For engineers reviewing the SMCG22A-E3/9AT datasheet, SMCG22A-E3/9AT pinout, SMCG22A-E3/9AT application, or SMCG22A-E3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), DO-215AB mechanical outline, and direct alternatives with documented clamping and leakage differences - all critical for ESD/surge co-design and automotive-grade BOM validation.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak tolerance.
The device delivers 1500 W surge handling on standard 8.0 mm × 8.0 mm copper pads, derates linearly above 25 °C ambient per Fig. 2, and maintains ≤1.0 µA reverse leakage at VWM - enabling reliable protection in 12 V automotive subsystems without signal distortion or standby current penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; sets system-level DC rail compatibility for 12 V nominal automotive circuits. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - defines guaranteed avalanche onset window; ensures consistent turn-on across temperature and unit-to-unit variation. |
| VC @ IPPM | 35.5 V - clamping voltage at 42.3 A peak pulse; determines maximum stress imposed on protected ICs during surge events. |
| PPPM | 1500 W - peak pulse power rating (10/1000 µs waveform); quantifies single-event energy absorption capability under standardized surge test conditions. |
| ID @ VWM | ≤1.0 µA - reverse leakage current at 22 V; ensures negligible standby power loss and avoids false triggering in high-impedance sensor interfaces. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended pad layout; enables thermal budgeting for sustained surge duty cycles. |
| AEC-Q101 | Qualified - certified for automotive electronic components per stress test requirements including HTOL, TCT, and ESD; supports PPAP documentation. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount case with matte tin-plated leads solderable per J-STD-002; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current during clamping; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode (banded end) | Current exit terminal in forward bias; connected to protected line (e.g., CAN_H or LIN bus). | Defines polarity-sensitive placement; incorrect orientation disables protection and risks catastrophic failure under reverse surge. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable avalanche characteristics over lifetime and prevents moisture-induced parameter drift in humid environments. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules - eliminates need for additional qualification testing. |
| MSL Level 1 rating | Supports standard SMT reflow without baking or special handling; compatible with high-volume automated assembly lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving margin for downstream logic-level ICs. |
| 1500 W peak pulse power | Handles severe load-dump events (e.g., alternator disconnection) in 12 V systems without degradation after single-event exposure. |
Applications
| Automotive Powertrain ECUs | Industrial Motor Drives |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and CAN transceivers from inductive kickback during solenoid or relay de-energization in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between CAN_H line and ground, clamping transients within 1 ns to limit voltage excursion below 36 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V CAN PHY receivers while maintaining signal integrity during 10/1000 µs surges up to 42.3 A. |
Use Scenario: Shielding encoder interface lines in servo drives from commutation noise and back-EMF spikes generated by BLDC motor switching. IC Role / Device Role / Timing Role: Bidirectional-capable variant used as unidirectional clamp on differential A/B quadrature signals referenced to isolated ground. Use Value: Limits common-mode transients to <35.5 V at 42.3 A, preserving timing accuracy of position feedback and avoiding false edge detection in FPGA-based counters. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Safeguarding 24 V DC input rails of PoE-powered network switches against lightning-induced surges on upstream Ethernet cabling. IC Role / Device Role / Timing Role: Primary-stage TVS mounted at board edge, shunting surge energy before it reaches DC/DC controllers and PMICs. Use Value: Absorbs 1500 W pulses without thermal runaway, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) when combined with series impedance. |
Use Scenario: Guarding microcontroller reset and communication lines (UART/I²C) in smart washing machine mainboards against ESD and relay contact bounce. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional TVS placed adjacent to MCU pins to avoid loading high-impedance pull-up networks. Use Value: Maintains <1 µA standby current while clamping 8 kV HBM ESD strikes to <35.5 V, preventing firmware lockup and ensuring Class A EMC performance. |
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) and VC (35.5 V), but lower PPPM (400 W) and IPPM (11.9 A); SMA (DO-214AC) package, larger footprint and higher RθJA (110 °C/W). | Not suitable for automotive load-dump or industrial 1500 W surge events; limited to consumer-grade ESD and low-energy transients. | Select only if cost sensitivity outweighs surge margin and board space allows larger SMA package. |
| SMCJ22A-E3/9AT | Identical VWM (22 V), VBR (24.4–26.9 V), and VC (35.5 V), but higher PPPM (3000 W); same DO-215AB package and AEC-Q101 qualification. | Over-spec'd for most 12 V systems; may require revised thermal layout due to doubled surge energy handling and identical RθJA. | Choose when future-proofing against harsher ISO 7637-2 Pulse 5a or when protecting high-current power MOSFET gates. |
Compared with SMCG22A-E3/9AT, SMAJ22A-E3/57T offers lower cost but insufficient surge capacity for automotive use, while SMCJ22A-E3/9AT doubles power rating at no package penalty - making it viable for next-gen designs requiring extended surge endurance without PCB redesign.
Availability
SMCG22A-E3/9AT is available at Aetrix Electronics and suitable for automotive powertrain ECUs, industrial motor drives, telecom power supply inputs, and consumer appliance control boards requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCG22A-E3/9AT 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 automotive-grade qualification.
The SMCG series was engineered specifically for high-power, surface-mount transient suppression in space-constrained automotive and industrial systems - delivering AEC-Q101 reliability in the compact DO-215AB footprint.
FAQ
What is the maximum clamping voltage of the SMCG22A-E3/9AT under full-rated surge conditions?
The SMCG22A-E3/9AT clamps to 35.5 V at its rated peak pulse current of 42.3 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet Document Number 88457, page 2. The clamping voltage directly determines the maximum stress applied to downstream ICs during surge events, making it a critical parameter for interface protection design in the SMCG22A-E3/9AT application.
Is the SMCG22A-E3/9AT suitable for bidirectional transient protection?
No - the SMCG22A-E3/9AT is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only in reverse bias above VBR and must be oriented with the cathode band toward the protected line. For bidirectional protection, the SMCG22CA-E3/9AT would be required. The SMCG22A-E3/9AT datasheet explicitly specifies unidirectional polarity and does not guarantee symmetrical clamping in forward conduction.
Does the SMCG22A-E3/9AT meet automotive qualification standards?
Yes - the SMCG22A-E3/9AT carries the "E3" suffix denoting RoHS-compliant, industrial-grade construction, and is explicitly AEC-Q101 qualified per the Vishay datasheet (Document Number 88457, page 1 and footnote 1). This certification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its use in automotive powertrain, body electronics, and ADAS modules.
What is the thermal resistance of the SMCG22A-E3/9AT, and how does it affect layout?
The SMCG22A-E3/9AT 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 Vishay datasheet (page 3). This value requires adequate copper area and thermal vias for sustained surge duty; reducing pad size increases RθJA and risks thermal runaway during repeated transients - a key constraint in SMCG22A-E3/9AT PCB layout.
How does the SMCG22A-E3/9AT differ from the SMAJ22A in terms of surge capability?
The SMCG22A-E3/9AT delivers 1500 W peak pulse power (PPPM) and 42.3 A peak pulse current (IPPM), whereas the SMAJ22A provides only 400 W and 11.9 A. Both share 22 V VWM and 35.5 V VC, but the SMCG22A-E3/9AT's DO-215AB package enables higher surge handling in the same footprint. This makes the SMCG22A-E3/9AT appropriate for automotive load-dump protection where the SMAJ22A would fail prematurely.
SMCG22A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCG22A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG22A-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCG22A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG22A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG22A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG22A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG22A-E3/9AT?
SMCG22A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG22A-E3/9AT 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-E3/9AT?
For technical support, including SMCG22A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG22A-E3/9AT requirements.
6.How does Aetrix verify that SMCG22A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG22A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG22A-E3/9AT?
All SMCG22A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG22A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG22A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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