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Vishay General Semiconductor - Diodes Division SMCG170AHE3/9AT
- Part No.:
- SMCG170AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG170AHE3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,201
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Product details
Overview
SMCG170AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection with 170 V standoff voltage (VWM), 189–209 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM). It delivers clamping voltage of 275 V at 5.5 A peak pulse current and is AEC-Q101 qualified for automotive electronics.
For engineers reviewing the SMCG170AHE3/9AT datasheet, SMCG170AHE3/9AT pinout, SMCG170AHE3/9AT application, or SMCG170AHE3/9AT equivalent, this device is selected for robust overvoltage protection on power rails and signal lines where fast response (<1 ns), low clamping ratio, and automotive-grade reliability are required.
Technical Context
The SMCG170AHE3/9AT uses a glass-passivated silicon junction to achieve fast transient response and stable clamping under repetitive surges. Its unidirectional polarity enables integration into DC-biased circuits such as automotive power supplies and industrial sensor interfaces.
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (260 °C peak reflow), it supports automated SMT assembly on standard PCBs with 8.0 mm × 8.0 mm copper pads per terminal for thermal derating control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 189 V / 209 V at 1.0 mA test current - Ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 275 V at 5.5 A (10/1000 µs waveform) - Limits protected circuit voltage during surge events |
| PPPM | 1500 W - Withstands high-energy transients per IEC 61000-4-5 Level 4 |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves battery life in always-on automotive modules |
| TJ max | +150 °C - Enables deployment in under-hood environments without thermal derating penalties |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount, gull-wing lead form with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; clamping node in reverse bias | Connected to protected line (e.g., 12 V rail or CAN-H); band denotes this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and lifetime |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS subsystems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control units (ECUs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 170 V. Use Value: Clamps to 275 V within nanoseconds, preventing damage to downstream PMICs and microcontrollers rated for ≤30 V absolute maximum. | Use Scenario: Safeguarding analog input pins of industrial current/voltage sensors exposed to field wiring noise and ESD. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS connected across differential signal pair to suppress common-mode transients. Use Value: Maintains signal integrity with minimal DC loading while meeting IEC 61000-4-4 level 4 immunity requirements. |
| Telecom DC Power Feeds | Consumer Device USB Power Input |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Reverse-biased unidirectional TVS referenced to negative rail, absorbing positive-going transients. Use Value: Handles 1500 W peak pulses without degradation, enabling compliance with GR-1089-CORE surge immunity standards. | Use Scenario: Adding secondary overvoltage protection on USB-C PD input stages in portable medical monitors. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary protection to limit residual clamping voltage seen by buck converter ICs. Use Value: 275 V clamping ensures protected DC-DC controller remains below its 30 V absolute maximum rating during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/57T | Same VWM (170 V) and PPPM (400 W), but lower power rating and SMA (DO-214AC) package | Limited to lower-energy transients (IEC 61000-4-5 Level 2); not AEC-Q101 qualified | Select when cost-sensitive consumer designs require basic protection without automotive qualification or high-power handling |
| SMCJ170AHE3/9AT | Identical VWM, VBR, and PPPM (1500 W), but SMC (DO-214AB) package with higher RθJA (90 °C/W vs. 75 °C/W) | Requires larger thermal pad area to maintain same TJ rise; same AEC-Q101 qualification | Choose if existing SMC footprint is locked and thermal margin allows higher junction temperature rise |
Compared with SMAJ170A-E3/57T, SMCG170AHE3/9AT provides 3.75× higher surge power handling and automotive qualification; versus SMCJ170AHE3/9AT, it offers superior thermal performance in the smaller DO-215AB outline, reducing PCB area by ~25% while maintaining identical electrical protection capability.
Availability
SMCG170AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and consumer USB-C PD input protection requiring stable component supply and full traceability.
Supply support for SMCG170AHE3/9AT 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 and automotive-grade validation.
The SMCG series was developed specifically for high-power transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 qualification with the compact DO-215AB footprint.
FAQ
What is the clamping voltage of SMCG170AHE3/9AT and how is it measured?
The SMCG170AHE3/9AT has a maximum clamping voltage (VC) of 275 V, measured at 5.5 A peak pulse current using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value reflects the actual voltage imposed on the protected circuit during worst-case surge conditions and is guaranteed across the full operating temperature range.
Is SMCG170AHE3/9AT suitable for bidirectional signal line protection?
No - SMCG170AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional variants). It conducts only in reverse bias and must be oriented with the cathode toward the protected line. For bidirectional protection, select SMCG170CAHE3/9AT, which exhibits symmetric clamping in both polarities.
Does SMCG170AHE3/9AT require derating at elevated ambient temperatures?
Yes - the SMCG170AHE3/9AT must be derated above TA = 25 °C per Figure 2 in the datasheet. At 85 °C ambient, its 1500 W PPPM rating drops to approximately 900 W due to thermal limitations, and its peak pulse current capability reduces proportionally. Thermal design must include 8.0 mm × 8.0 mm copper pads per terminal to meet published derating curves.
What does the "HE3" suffix mean in SMCG170AHE3/9AT?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads. It distinguishes the part from industrial-grade "E3" (RoHS, non-automotive) and halogen-free "HM3" variants. The "9AT" denotes 13-inch tape-and-reel packaging with 3500 units per reel.
Can SMCG170AHE3/9AT replace SMAJ170A in an existing design?
No direct replacement - although both share 170 V VWM, SMCG170AHE3/9AT has 1500 W PPPM versus SMAJ170A's 400 W, and uses the DO-215AB (SMCG) package instead of DO-214AC (SMA). PCB layout, thermal design, and surge immunity requirements must be revalidated; the higher power rating may necessitate revised board-level filtering or grounding strategies.
SMCG170AHE3/9AT 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMCG170AHE3/9AT FAQ
1.How can I place an order for SMCG170AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG170AHE3/9AT 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 SMCG170AHE3/9AT reliable?
The price and inventory of SMCG170AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG170AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG170AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG170AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG170AHE3/9AT?
SMCG170AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG170AHE3/9AT 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 SMCG170AHE3/9AT?
For technical support, including SMCG170AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG170AHE3/9AT requirements.
6.How does Aetrix verify that SMCG170AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG170AHE3/9AT 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 SMCG170AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG170AHE3/9AT?
All SMCG170AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG170AHE3/9AT, 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 SMCG170AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG170AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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