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Vishay General Semiconductor - Diodes Division SMCG170AHE3/57T
- Part No.:
- SMCG170AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG170AHE3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,915
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Product details
Overview
SMCG170AHE3/57T 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 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 5.5 A maximum clamping current (IPPM), and 275 V clamping voltage (VC) - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCG170AHE3/57T datasheet, SMCG170AHE3/57T pinout, SMCG170AHE3/57T application, or SMCG170AHE3/57T equivalent, this AEC-Q101 qualified, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 reflow compatibility - critical for high-reliability 12 V/24 V system design and ESD/transient immunity validation.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (189–209 V), it avalanches to limit transient energy across protected circuit nodes. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response (<1 ns), while the DO-215AB package supports automated placement and thermal dissipation via copper pad mounting.
The device complies with ANSI/IEEE C62.35 for surge testing and meets UL 497B recognition (QVGQ2). With RθJA = 75 °C/W and TJ max = +150 °C, it sustains repeated transients under derated conditions per Fig. 2, and delivers 200 A IFSM (8.3 ms half-sine) for inductive load switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping initiates; sets protection threshold for 24 V nominal systems. |
| VBR (min/max) | 189 V / 209 V at IT = 1 mA - defines guaranteed avalanche onset range; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 275 V at 5.5 A (10/1000 µs) - clamping voltage during rated surge; determines maximum stress on downstream ICs or MOSFETs. |
| PPPM | 1500 W - peak transient power handling capability; enables protection against ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at stand-off; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max | +150 °C - maximum junction temperature rating; supports under-hood automotive and industrial environments without derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TCT, and ESD testing; suitable for ASIL-B supporting functions. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing (Class 2). Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional configuration. | Provides return path during clamping; must be routed to lowest-impedance ground plane to minimize VPEAK rise. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., battery rail, signal input). | Acts as the sensing node - voltage at cathode relative to anode triggers avalanche; band marking identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors - no additional qualification required. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure - critical for 15+ year automotive service life. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., load dump), improving margin for 3.3 V/5 V logic-level interface ICs. |
| MSL Level 1 (260 °C peak) | Enables single-pass reflow assembly without moisture sensitivity concerns - eliminates bake requirements and process delays. |
| UL 497B recognition (QVGQ2) | Confirms compliance with telecom and industrial surge protection safety standards - simplifies end-equipment certification. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs against ISO 7637-2 load dump pulses (up to 120 V) and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between battery rail and DC-DC converter input. Use Value: Limits peak voltage to ≤275 V during 1500 W surges, preventing damage to upstream regulators and enabling compliance with OEM electrical architecture specs. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part protects against negative-going transients on grounded-signal configurations. Use Value: Sub-1 µA leakage at 170 V ensures minimal error injection into precision current sources, preserving ±0.1% measurement accuracy. |
| Telecom Power Feeding | Computer Peripheral Port Protection |
|
Use Scenario: Securing PoE-powered equipment (e.g., IP cameras) against induced surges on 48 V DC feed lines from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side DC input, coordinated with secondary MOV or GDT stages. Use Value: 1500 W PPPM rating allows single-device handling of IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) up to Level 4 without cascading. |
Use Scenario: Hardening USB-C or DisplayPort auxiliary channel lines against ESD and cable-induced transients in docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at 0 V) placed directly at connector, referenced to chassis ground. Use Value: 275 V clamping voltage prevents latch-up in USB transceivers while maintaining signal integrity up to 10 Gbps. |
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; SMA (DO-214AC) package, higher RθJA (100 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump. | Select when cost or board space is constrained and surge energy is ≤400 W. |
| SMCJ170AHE3/57T | Identical VWM, VBR, and PPPM (1500 W), but SMC (DO-214AB) package - larger footprint, higher thermal mass, RθJA = 50 °C/W. | Better thermal performance in high-ambient environments; requires larger PCB pad area (≥10 mm² per pad). | Prefer for extended-life industrial designs where thermal margin >20 °C is required at full power. |
Compared with SMAJ170A-E3/57T and SMCJ170AHE3/57T, SMCG170AHE3/57T delivers identical surge robustness in a smaller DO-215AB footprint with optimized reflow compatibility - balancing space, thermal, and automotive qualification needs without layout redesign.
Availability
SMCG170AHE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom power feeding requiring stable component supply, AEC-Q101 traceability, and 1500 W transient immunity.
Supply support for SMCG170AHE3/57T 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 application-specific optimization.
The SMCG series was developed for high-power, surface-mount transient suppression in space-constrained automotive and industrial systems - prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance.
FAQ
What is the clamping voltage of SMCG170AHE3/57T at its rated peak pulse current?
The SMCG170AHE3/57T has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current (IPPM) of 5.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream IC survival in 24 V automotive systems.
Is SMCG170AHE3/57T suitable for bidirectional transient protection?
No, SMCG170AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only in reverse bias above VBR and blocks forward current beyond VF ≈ 3.5 V at 100 A. For bidirectional protection, use SMCG170CAHE3/57T - which has symmetric breakdown in both directions and no polarity marking.
Does SMCG170AHE3/57T require special PCB layout considerations?
Yes - Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal performance. Smaller pads reduce surge current capacity and increase junction temperature; inadequate copper area may cause premature failure during repetitive transients.
What does the "HE3/57T" suffix mean in SMCG170AHE3/57T?
"HE3" denotes RoHS-compliant, AEC-Q101-qualified construction (halogen-free option is HM3); "57T" indicates packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This suffix confirms compliance with automotive reliability standards and supports automated SMT assembly without moisture sensitivity concerns.
How does SMCG170AHE3/57T compare to older SMAJ-series TVS diodes in surge handling?
SMCG170AHE3/57T delivers 1500 W peak pulse power - 3.75× higher than SMAJ170A's 400 W rating - enabling protection against severe transients like ISO 7637-2 Pulse 5a (load dump). Its lower RθJA (75 °C/W vs. 100 °C/W) and DO-215AB package also improve thermal response and board density versus SMA (DO-214AC) alternatives.
SMCG170AHE3/57T 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)
SMCG170AHE3/57T FAQ
1.How can I place an order for SMCG170AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG170AHE3/57T 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 SMCG170AHE3/57T reliable?
The price and inventory of SMCG170AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG170AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG170AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG170AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG170AHE3/57T?
SMCG170AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG170AHE3/57T 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 SMCG170AHE3/57T?
For technical support, including SMCG170AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG170AHE3/57T requirements.
6.How does Aetrix verify that SMCG170AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG170AHE3/57T 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 SMCG170AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG170AHE3/57T?
All SMCG170AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG170AHE3/57T, 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 SMCG170AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG170AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG170AHE3/57T Tags
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