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Vishay General Semiconductor - Diodes Division SMCG17AHE3/9AT
- Part No.:
- SMCG17AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG17AHE3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,774
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Product details
Overview
SMCG17AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed on signal lines and power rails in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCG17AHE3/9AT datasheet, SMCG17AHE3/9AT pinout, SMCG17AHE3/9AT application, or SMCG17AHE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-215AB mechanical dimensions, clamping performance under surge conditions, and direct alternatives for circuit protection design-in.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior and low incremental surge resistance. Its 1500 W PPPM rating is validated on 8.0 mm × 8.0 mm copper pads per terminal, and thermal resistance is specified at RθJA = 75 °C/W and RθJL = 15 °C/W.
The SMCG17AHE3/9AT is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is AEC-Q101 qualified - confirming suitability for automotive-grade reliability requirements without derating in standard PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 18.9 V / 20.9 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 27.6 V at 54.3 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - peak pulse power handling capability; supports high-energy ESD and load-dump suppression. |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; negligible power loss and signal integrity impact in standby. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with matte tin-plated leads; compatible with automated SMT placement and J-STD-002 soldering. |
Pinout & Package
SMCG17AHE3/9AT uses the SMCG (DO-215AB) package: a compact, low-profile gull-wing surface-mount outline measuring 7.87 mm × 3.17 mm × 2.41 mm (L × W × H), with cathode identified by a band on the body. Terminals are matte tin-plated and compliant with JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or lower-potential rail in unidirectional TVS configuration. | Provides low-impedance path to ground during reverse-transient clamping; must be routed with minimal inductance. |
| Cathode | Current exit point in forward bias; marked with band; connected to protected line (e.g., CAN_H, LIN, sensor supply). | Defines polarity-sensitive connection - reversal prevents clamping and risks device failure under surge. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails - no additional qualification testing required. |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over temperature and lifetime; eliminates parameter drift due to moisture or contamination. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak - simplifies manufacturing and eliminates baking requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 Pulse 1/2a/5a); improves clamping precision versus silicon carbide or polymer alternatives. |
| 1500 W peak pulse power | Supports full compliance with IEC 61000-4-5 (Level 4, 4 kV line-to-ground) when mounted per recommended pad layout. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VCC and GND, upstream of LDO regulators. Use Value: Limits voltage to ≤27.6 V during 1500 W surges, preventing brownout or latch-up in MCU power domains. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loop drivers) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry TVS on signal line, with cathode tied to output and anode to system ground. Use Value: Clamps transients within 1 ns response time while maintaining <1 µA leakage at 17 V - preserving signal accuracy. |
| Automotive LIN Bus Interface Protection | Consumer Appliance Motor Driver Protection |
Use Scenario: Shielding LIN transceiver pins (e.g., TJA1020) from cable discharge events and board-level ESD in door modules and seat controls. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; SMCG17AHE3/9AT used in unidirectional configuration on LIN_VCC rail only. Use Value: Provides 17 V operating margin aligned with LIN spec (12 V nominal), ensuring no false triggering during normal operation. |
Use Scenario: Suppressing flyback spikes from brushed DC motor commutation in washing machine control boards. IC Role / Device Role / Timing Role: TVS placed across motor terminals or MOSFET drain-source, with cathode to high-side switch node. Use Value: Absorbs repetitive 1500 W pulses without degradation, extending MOSFET lifetime and reducing EMI emissions. |
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 VC (27.6 V), but SMA (DO-214AC) package; 600 W PPPM rating (vs. 1500 W). | Limited to lower-energy transients (IEC 61000-4-2 Level 3); unsuitable for load dump or ISO 7637-2 Pulse 5a. | Select when space constraints favor smaller SMA footprint and surge energy is ≤600 W. |
| SMCJ17AHE3/9AT | Identical electrical specs (VWM, VBR, VC, PPPM) and AEC-Q101 qualification, but SMC (DO-214AB) package - 0.15 mm taller and 0.3 mm wider than SMCG. | Compatible with same PCB layout only if pad dimensions accommodate larger body; higher thermal mass may improve long-pulse dissipation. | Choose when existing SMC footprints exist or higher thermal inertia is preferred for repetitive surge duty cycles. |
Compared with SMAJ17A-E3/57T, SMCG17AHE3/9AT delivers 2.5× higher surge power handling in a lower-profile package; versus SMCJ17AHE3/9AT, it offers identical protection performance with reduced height - critical for low-clearance automotive modules.
Availability
SMCG17AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor drive circuits requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMCG17AHE3/9AT 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCG series was engineered specifically for high-power transient suppression in space-constrained automotive and industrial applications - balancing 1500 W surge capability with low-profile gull-wing packaging and AEC-Q101 validation.
FAQ
What is the clamping voltage of SMCG17AHE3/9AT at its rated peak pulse current?
The SMCG17AHE3/9AT has a maximum clamping voltage (VC) of 27.6 V at 54.3 A peak pulse current (IPPM), measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The SMCG17AHE3/9AT maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMCG17AHE3/9AT suitable for automotive applications?
Yes, SMCG17AHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its -55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility (260 °C peak), and 1500 W surge capability meet requirements for ECU power rail and sensor interface protection. The "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification - a key differentiator from industrial-grade variants like "E3".
What does the "9AT" suffix indicate in SMCG17AHE3/9AT?
The "9AT" suffix in SMCG17AHE3/9AT specifies the packaging format: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This differs from "57T", which denotes a 7-inch reel with 850 units. Both formats use the same SMCG (DO-215AB) package and identical electrical specifications - the suffix solely identifies reel size and quantity for logistics and SMT placement line feeding.
How does SMCG17AHE3/9AT differ from bidirectional TVS diodes like SMCG17CA?
SMCG17AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse voltage is blocked. In contrast, SMCG17CA is bidirectional, has no polarity marking, and clamps symmetrically in both directions - suited for AC lines or differential buses like RS-485. Their VWM (17 V), VBR (18.9–20.9 V), and VC (27.6 V) match, but SMCG17AHE3/9AT cannot replace SMCG17CA in AC-coupled applications without circuit redesign.
What is the thermal resistance of SMCG17AHE3/9AT, and how does it affect PCB layout?
The SMCG17AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on 8.0 mm × 8.0 mm copper pads per terminal. To achieve rated 1500 W pulse power, PCB layout must replicate this pad area - undersized pads increase thermal impedance, causing premature thermal runaway during repeated surges. The SMCG17AHE3/9AT datasheet Figure 2 provides derating curves for elevated ambient temperatures.
SMCG17AHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG17AHE3/9AT FAQ
1.How can I place an order for SMCG17AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG17AHE3/9AT 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 SMCG17AHE3/9AT reliable?
The price and inventory of SMCG17AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG17AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG17AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG17AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG17AHE3/9AT?
SMCG17AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG17AHE3/9AT 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 SMCG17AHE3/9AT?
For technical support, including SMCG17AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG17AHE3/9AT requirements.
6.How does Aetrix verify that SMCG17AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG17AHE3/9AT 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 SMCG17AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG17AHE3/9AT?
All SMCG17AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG17AHE3/9AT, 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 SMCG17AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG17AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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