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Vishay General Semiconductor - Diodes Division SMCG17A-E3/9AT
- Part No.:
- SMCG17A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG17A-E3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG17A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a standoff voltage of 17 V, breakdown voltage range 18.9–20.9 V at 1 mA, peak pulse power rating of 1500 W (10/1000 µs), clamping voltage of 27.6 V at 54.3 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG17A-E3/9AT datasheet, SMCG17A-E3/9AT pinout, SMCG17A-E3/9AT application, or SMCG17A-E3/9AT equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in automotive ECUs, industrial motor drives, and telecom interface circuits where high surge immunity and low clamping voltage are critical.
Technical Context
The SMCG17A-E3/9AT operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its breakdown threshold (VBR = 18.9–20.9 V). It delivers 1500 W peak pulse power handling per the standardized 10/1000 µs waveform, with clamping voltage limited to 27.6 V at 54.3 A - enabling effective protection of downstream 24 V-rated ICs and MOSFETs.
Its glass-passivated junction ensures stable performance across -55 °C to +150 °C operating temperature, while the DO-215AB package supports automated SMT placement and meets UL 94 V-0 flammability requirements. The E3 suffix confirms RoHS compliance and industrial-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - precise breakdown window ensures predictable turn-on without premature leakage or delayed clamping. |
| VC @ IPPM | 27.6 V at 54.3 A - clamping voltage during full 1500 W surge; keeps protected circuitry below 30 V stress threshold. |
| PPPM | 1500 W - peak pulse power capability per 10/1000 µs waveform; withstands ISO 7637-2 Pulse 1/2/5a transients in automotive environments. |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy load dump events. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive locations and sealed industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded package with 3.17 mm × 2.41 mm body, 0.20 mm minimum seating plane clearance, and matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional mode) | Connected to system ground or low-side return path; polarity-sensitive for correct transient shunting direction. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 24 V rail or CAN_H); conducts surge current to ground when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-215AB package | Enables compact PCB layout in space-constrained automotive modules and industrial sensors without sacrificing thermal or surge performance. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current under thermal cycling and humidity exposure per AEC-Q101 requirements. |
| 1500 W peak pulse power | Provides immunity against severe transients including ISO 16750-2 load dump (up to 120 V, 400 ms) and ISO 7637-2 coupled surges. |
| 27.6 V clamping at 54.3 A | Keeps protected 24 V logic and gate drivers within safe operating area during worst-case surge events. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-related popcorning or delamination risks. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) and body control modules (BCMs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges before they reach PMICs, microcontrollers, and CAN transceivers. Use Value: Limits transient voltage to ≤27.6 V, preventing latch-up or permanent damage to 30 V-rated power management ICs and ensuring ASIL-B functional safety compliance. | Use Scenario: Safeguarding gate driver inputs and feedback signal lines in variable-frequency drives (VFDs) exposed to back-EMF spikes from inductive motor windings. IC Role / Device Role / Timing Role: TVS mounted directly at IGBT gate terminals and analog current sense inputs to suppress fast-rising dv/dt-induced coupling. Use Value: Sub-100 ns response time and 27.6 V clamping prevent false triggering of gate drivers and preserve accuracy of ±0.5% current sensing under 1 kV/µs transients. |
| Telecom Interface Protection | Consumer Appliance Power Input |
Use Scenario: Shielding RS-485 and Ethernet PHY power rails in base station remote radio units (RRUs) from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of secondary filtering and isolation components on 12–24 V bias supplies. Use Value: 1500 W rating and low incremental surge resistance enable reliable multi-event survivability in harsh outdoor telecom environments. | Use Scenario: Overvoltage protection on AC/DC adapter outputs in smart home appliances (e.g., washing machine mainboard 24 V supply). IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side DC bus to absorb switching noise and transformer ringback spikes from flyback converters. Use Value: 17 V VWM provides 30% margin above nominal 24 V output while maintaining <1 µA leakage at room temperature for low standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Same VWM (17 V) and VBR range, but lower PPPM (400 W) and smaller SMA (DO-214AC) package with higher RθJA (110 °C/W). | Not suitable for automotive load dump; limited to low-energy surges in consumer electronics or low-power industrial sensors. | Select only if board space is extremely constrained and surge energy remains below 100 mJ. |
| SMCJ17A-E3/9AT | Identical electrical specs (VWM, VBR, VC, PPPM) but larger SMC (DO-214AB) package with 1.5× higher thermal mass and 50% lower RθJA (50 °C/W). | Better thermal performance for repeated surge events; preferred for high-duty-cycle industrial applications with ambient >85 °C. | Choose when sustained surge repetition or elevated ambient temperature requires enhanced thermal derating margin. |
Compared with SMAJ17A-E3/57T and SMCJ17A-E3/9AT, the SMCG17A-E3/9AT delivers optimal balance of high surge capacity (1500 W), compact DO-215AB footprint, and AEC-Q101 qualification - making it the preferred choice for space-limited automotive and industrial designs requiring certified reliability without thermal compromise.
Availability
SMCG17A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom infrastructure projects requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCG17A-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, TVS devices, and optoelectronics with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The SMCG series was engineered specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, DO-215AB packaging efficiency, and 1500 W surge capability in a single-component solution.
FAQ
What is the clamping voltage of SMCG17A-E3/9AT at its rated peak pulse current?
The SMCG17A-E3/9AT has a maximum clamping voltage (VC) of 27.6 V at its peak pulse current (IPPM) of 54.3 A, measured using the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and ensures protected circuitry remains within safe voltage limits during surge events. The SMCG17A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG17A-E3/9AT qualified for automotive applications?
Yes, the SMCG17A-E3/9AT carries AEC-Q101 qualification, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS subsystems. The device undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and electrostatic discharge per JESD22 standards. The SMCG17A-E3/9AT's E3 suffix denotes RoHS-compliant industrial grade, and its qualification status is explicitly stated in the Vishay document 88457.
What does the "E3/9AT" suffix mean in SMCG17A-E3/9AT?
The "E3" suffix indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting J-STD-002 solderability requirements. The "9AT" denotes packaging in a 13-inch diameter plastic tape and reel containing 3500 units - optimized for high-volume SMT assembly. This configuration is distinct from the "57T" variant (7-inch reel, 850 units). The SMCG17A-E3/9AT uses the same die and electrical specifications as other SMCG17A variants.
How does SMCG17A-E3/9AT differ from bidirectional SMCG17CA variants?
The SMCG17A-E3/9AT is unidirectional, featuring a cathode band marking and conducting only in reverse bias above VBR; the SMCG17CA variant is bidirectional with no polarity marking and symmetric clamping in both directions. Their VWM (17 V) and VBR ranges match, but SMCG17A-E3/9AT supports forward surge current (IFSM = 200 A), while SMCG17CA does not. The SMCG17A-E3/9AT is selected for DC rail protection where polarity is fixed.
What is the thermal resistance of SMCG17A-E3/9AT, and how does it affect layout?
The SMCG17A-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 defined in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing pad size increases thermal resistance and reduces surge derating. For reliable operation at high ambient temperatures, the SMCG17A-E3/9AT requires adequate copper area and may need thermal vias to inner layers - especially in automotive under-hood applications.
SMCG17A-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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)
SMCG17A-E3/9AT FAQ
1.How can I place an order for SMCG17A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG17A-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 SMCG17A-E3/9AT reliable?
The price and inventory of SMCG17A-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 SMCG17A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG17A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG17A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG17A-E3/9AT?
SMCG17A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG17A-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 SMCG17A-E3/9AT?
For technical support, including SMCG17A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG17A-E3/9AT requirements.
6.How does Aetrix verify that SMCG17A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG17A-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 SMCG17A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG17A-E3/9AT?
All SMCG17A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG17A-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 SMCG17A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG17A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG17A-E3/9AT Tags
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