My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCG170A-E3/9AT
- Part No.:
- SMCG170A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG170A-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCG170A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamping voltage of 275 V at 5.5 A IPPM. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial power electronics.
For engineers reviewing the SMCG170A-E3/9AT datasheet, SMCG170A-E3/9AT pinout, SMCG170A-E3/9AT application, or SMCG170A-E3/9AT equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), DO-215AB package dimensions, and bidirectional-compatible alternatives - all critical for surge protection design validation and BOM selection.
Technical Context
This TVS diode operates as a clamping-type transient suppressor with glass-passivated junction and low incremental surge resistance, enabling fast response to 10/1000 µs waveform transients. Its unidirectional polarity uses cathode-band marking and supports peak forward surge current (IFSM) up to 200 A for 8.3 ms half-sine pulses.
Designed for surface-mount automated placement, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), UL 497B recognition (QVGQ2), and AEC-Q101 qualification. Thermal performance is specified with RθJL = 15 °C/W and derating curves for junction temperature up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 189 V / 209 V at 1.0 mA IT - Confirmed breakdown threshold ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 275 V at 5.5 A - Clamping voltage under 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust suppression of high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; informs PCB thermal layout requirements. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional configuration. | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode | Current exit terminal in forward bias; marked by band on device body; connects to protected line (e.g., 12 V rail or CAN signal). | Defines polarity-sensitive placement; reversal prevents clamping action and risks catastrophic failure under surge. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in humid environments. |
| Low incremental surge resistance | Minimizes dynamic impedance during clamping, reducing VC and improving energy absorption efficiency. |
| MSL Level 1 compliance | Enables single-reflow assembly without pre-baking, reducing manufacturing cost and process complexity. |
| UL 497B recognition (QVGQ2) | Validates suitability for telecom and industrial surge protection systems requiring third-party safety certification. |
| Matte tin-plated leads | Guarantees reliable solder wetting and intermetallic formation on PCBs using lead-free or SnPb processes. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power rails in engine control units (ECUs) and body control modules (BCMs) from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Withstands 1500 W surges and clamps to ≤275 V, preventing damage to downstream LDOs and microcontrollers during ISO 16750-2 load dump events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor interface PCB, mounted directly at connector pins. Use Value: Fast 10/1000 µs response and low leakage (<1.0 µA at 170 V) preserve signal integrity while suppressing EFT bursts per IEC 61000-4-4. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drivers |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on midspan injector output, coordinated with secondary-side MOVs. Use Value: 170 V VWM aligns with IEEE 802.3bt Type 4 (up to 57 V) systems; 275 V VC limits stress on Ethernet PHY front-end. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals, adjacent to H-bridge MOSFETs. Use Value: 200 A IFSM rating handles repetitive commutation surges; AEC-Q101 qualification ensures long-term reliability in thermally demanding enclosures. |
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 (e.g., ESD only); unsuitable for load dump or lightning-level surges. | Select when board space is constrained and surge energy does not exceed 400 W. |
| SMCG170CA-E3/9AT | Bidirectional variant with identical VWM (170 V), VBR (189–209 V), and PPPM (1500 W); no polarity marking. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN FD) where reverse polarity events occur. | Choose for symmetric transient protection where signal polarity is undefined or bidirectional. |
Compared with SMCG170A-E3/9AT, SMAJ170A-E3/57T offers smaller footprint but sacrifices 73% peak power handling, while SMCG170CA-E3/9AT provides identical surge capability with polarity-agnostic operation - making it essential for differential bus protection but unnecessary for grounded DC rail clamping.
Availability
SMCG170A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC feeds, and consumer appliance motor drivers requiring stable component supply across production lifecycles.
Supply support for SMCG170A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific qualification.
The SMCG series targets high-energy transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance and UL recognition in automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMCG170A-E3/9AT and how is it measured?
The SMCG170A-E3/9AT has a maximum clamping voltage (VC) of 275 V, measured at a peak pulse current (IPPM) of 5.5 A using a standardized 10/1000 µs double-exponential waveform. This value reflects the actual voltage seen by protected circuitry during a surge event and is guaranteed per Vishay's datasheet revision 09-Jan-2024. The SMCG170A-E3/9AT achieves this clamping performance due to its low incremental surge resistance and optimized silicon junction design.
Is SMCG170A-E3/9AT qualified for automotive use?
Yes, SMCG170A-E3/9AT is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per the AEC-Q101 standard. Its qualification applies specifically to the SMCG package variant with E3 suffix (RoHS-compliant, industrial grade), and the device is widely deployed in engine control units, body electronics, and ADAS power supplies. The SMCG170A-E3/9AT meets automotive reliability requirements without requiring additional qualification by the end user.
What does the "-E3/9AT" suffix mean in SMCG170A-E3/9AT?
The "-E3" suffix indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "/9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3500 units. This differs from "/57T", which denotes an 850-unit 7-inch reel. Both variants share identical electrical and thermal specifications; the suffix solely defines environmental compliance and logistics configuration for SMCG170A-E3/9AT.
Can SMCG170A-E3/9AT be used in bidirectional signal lines like RS-485?
No - SMCG170A-E3/9AT is unidirectional and will not suppress positive-going transients on the anode side. For bidirectional lines such as RS-485 or CAN, the bidirectional variant SMCG170CA-E3/9AT must be used instead. That part features symmetrical breakdown in both directions and no polarity marking, ensuring protection regardless of signal swing direction. Using SMCG170A-E3/9AT in such applications leaves half the transient spectrum unprotected.
What is the thermal resistance of SMCG170A-E3/9AT and how does it affect PCB layout?
The SMCG170A-E3/9AT 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. To maintain safe junction temperatures under repeated surges, PCB layout must replicate this pad area and use internal ground planes for heat spreading. Reducing pad size increases RθJA, risking thermal runaway during high-duty-cycle transients - a key design constraint for SMCG170A-E3/9AT in compact automotive modules.
SMCG170A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG170A-E3/9AT FAQ
1.How can I place an order for SMCG170A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG170A-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 SMCG170A-E3/9AT reliable?
The price and inventory of SMCG170A-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 SMCG170A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG170A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG170A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG170A-E3/9AT?
SMCG170A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG170A-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 SMCG170A-E3/9AT?
For technical support, including SMCG170A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG170A-E3/9AT requirements.
6.How does Aetrix verify that SMCG170A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG170A-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 SMCG170A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG170A-E3/9AT?
All SMCG170A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG170A-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 SMCG170A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG170A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG170A-E3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
