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Vishay General Semiconductor - Diodes Division SMCJ170A-E3/9AT
- Part No.:
- SMCJ170A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170A-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,021
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Product details
Overview
SMCJ170A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 170 V stand-off voltage (VWM), 275 V maximum clamping voltage (VC) at 5.5 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 μs waveform.
For engineers reviewing the SMCJ170A-E3/9AT datasheet, SMCJ170A-E3/9AT pinout, SMCJ170A-E3/9AT application, or SMCJ170A-E3/9AT equivalent, key selection considerations include its unidirectional polarity, 189–209 V breakdown voltage range (VBR), -55 °C to +150 °C operating junction temperature, RoHS-compliant matte tin-plated leads, and suitability for automotive-grade designs when ordered with HE3 suffix.
Technical Context
The SMCJ170A-E3/9AT operates as a clamping-type TVS diode using an avalanche breakdown mechanism to divert transient energy away from protected circuitry. Its glass-passivated silicon junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent clamping performance under repetitive surge events.
Designed for surface-mount assembly on standard PCB copper pads (0.31" × 0.31"), it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and supports automated placement. The device exhibits a temperature coefficient of VBR at 0.108 %/°C, indicating predictable voltage drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 189 V / 209 V at 1.0 mA test current - Ensures reliable avalanche conduction onset within tight tolerance band. |
| VC @ IPPM | 275 V at 5.5 A - Clamping voltage during 10/1000 μs surge; limits downstream voltage stress to protected ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capability; determines survivability against high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs derating requirements when mounted on minimal copper area. |
| ID @ VWM | 1.0 μA - Reverse leakage at stand-off voltage; ensures negligible standby power loss in high-impedance signal lines. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to ground or lower-potential rail; completes clamping path during positive transients. |
| Cathode | Avalanche breakdown terminal | Marked with band; connected to protected line (e.g., power rail or signal); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands high-energy transients such as load dump or EFT bursts without degradation. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low leakage across temperature and life cycles. |
| MSL Level 1 rating | Supports single-reflow lead-free assembly up to 260 °C without moisture-induced damage. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time). |
| AEC-Q101 qualification option | Available with HE3 suffix for automotive applications requiring validated reliability per stress test standards. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle power distribution networks from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECUs or body control modules. Use Value: Limits transient voltage to ≤275 V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or gate oxide failure in downstream regulators and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-leakage TVS installed at connector interface to suppress sub-100 ns ESD events per IEC 61000-4-2 Level 4. Use Value: Maintains signal integrity with only 1.0 μA leakage at 170 V, avoiding DC offset errors in precision 4–20 mA or 0–10 V sensor circuits. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against surges from outdoor cabling or AC/DC adapter faults. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input stage upstream of DC-DC converters. Use Value: Delivers 1500 W surge handling with 275 V clamping, meeting GR-1089-CORE Level 3 telecom surge immunity requirements. |
Use Scenario: Preventing damage to USB-C PD controllers or internal LDOs from accidental 20 V adapter misconnection or hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line with fast response (<1 ns) to clamp overvoltage before controller IC fails. Use Value: Enables robust 170 V standoff while maintaining <0.1% voltage coefficient drift, ensuring stable protection margin across ambient temperature ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170A | Same VWM (170 V) and VC (275 V), but lower PPPM (600 W); SOD-123FL package, smaller footprint. | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 4 kV surge testing. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 (0.5 kV). |
| SMCJ170CA-E3/9AT | Bidirectional variant with identical VWM (170 V), VC (275 V), and PPPM (1500 W); same SMC package but no polarity marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where reverse transients must also be suppressed. | Choose when protecting bidirectional interfaces; note that unidirectional SMCJ170A-E3/9AT cannot replace bidirectional function. |
Compared with SAC170A and SMCJ170CA-E3/9AT, the SMCJ170A-E3/9AT provides full 1500 W surge capacity in a standardized SMC footprint with verified unidirectional clamping behavior-making it optimal for high-reliability DC rail protection where polarity is fixed and energy levels exceed 600 W.
Availability
SMCJ170A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom DC input, and consumer USB/DC jack protection requiring stable component supply and traceable sourcing.
Supply support for SMCJ170A-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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ISO 7637-2, IEC 61000-4-5, and ESD threats is critical.
FAQ
What is the breakdown voltage range for SMCJ170A-E3/9AT?
The SMCJ170A-E3/9AT has a guaranteed breakdown voltage (VBR) range of 189 V to 209 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight 10.6% tolerance ensures predictable clamping onset and supports design margining for 170 V nominal systems. The value is confirmed in Vishay document 88394, Table on page 2.
Is SMCJ170A-E3/9AT RoHS-compliant and lead-free?
Yes, the SMCJ170A-E3/9AT is RoHS-compliant and lead-free, as indicated by the "E3" suffix per Vishay's ordering nomenclature. It uses matte tin-plated leads and meets JESD 201 Class 2 whisker resistance. The device is rated for peak reflow temperatures up to 260 °C and conforms to MSL Level 1 per J-STD-020.
Can SMCJ170A-E3/9AT be used in automotive applications?
The base SMCJ170A-E3/9AT is commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes like SMCJ170AHE3_A/I. For automotive use, specify the HE3 or HM3 suffix variants-these undergo stress testing per AEC-Q101 and are documented in the same datasheet (88394) with footnote (1) on page 3.
What is the maximum clamping voltage of SMCJ170A-E3/9AT under surge conditions?
The SMCJ170A-E3/9AT clamps to a maximum of 275 V when subjected to its rated 5.5 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table (page 2 of document 88394) and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the thermal resistance of SMCJ170A-E3/9AT affect PCB layout?
The SMCJ170A-E3/9AT has a typical RθJA of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper). To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, designers must provide adequate copper area or consider derating above 25 °C ambient-per Figure 2 in Vishay document 88394.
SMCJ170A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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 (SMCJ)
SMCJ170A-E3/9AT FAQ
1.How can I place an order for SMCJ170A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170A-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 SMCJ170A-E3/9AT reliable?
The price and inventory of SMCJ170A-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 SMCJ170A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170A-E3/9AT?
SMCJ170A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170A-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 SMCJ170A-E3/9AT?
For technical support, including SMCJ170A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ170A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170A-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 SMCJ170A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170A-E3/9AT?
All SMCJ170A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170A-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 SMCJ170A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170A-E3/9AT Tags
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