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Vishay General Semiconductor - Diodes Division SMCJ170A-E3/57T
- Part No.:
- SMCJ170A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170A-E3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
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Product details
Overview
SMCJ170A-E3/57T 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-E3/57T datasheet, SMCJ170A-E3/57T pinout, SMCJ170A-E3/57T application, or SMCJ170A-E3/57T equivalent, key selection criteria include clamping performance under 10/1000 μs surge, junction temperature derating above 25 °C, unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ170A-E3/57T employs a glass-passivated silicon junction optimized for fast transient response (<1 ps) and low incremental surge resistance. Its breakdown voltage range is 189–209 V at 1 mA test current (VBR), with a temperature coefficient of 0.108 %/°C - critical for stable clamping across automotive (-55 to +150 °C) operating ranges.
It operates as a unidirectional clamp: reverse-biased during normal operation (leakage ≤1.0 μA at 170 V), then avalanche-conducting during overvoltage events. The cathode band denotes polarity, and its MSL Level 1 rating supports reflow up to 260 °C peak per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 189 V / 209 V at 1 mA - ensures reliable avalanche turn-on within defined tolerance band |
| VC @ IPPM | 275 V at 5.5 A - clamping voltage limits downstream IC stress during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy absorption capability with standard 10/1000 μs waveform |
| TJ max | +150 °C - enables use in under-hood automotive and industrial power supply environments |
| RθJA | 75 °C/W - thermal resistance dictates required PCB copper area for sustained 6.5 W power dissipation |
| Polarity | Unidirectional - requires correct orientation relative to protected line's DC bias |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when reverse voltage exceeds VBR |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures long-term reliability and stable VBR under repeated surge stress and humidity exposure |
| MSL Level 1 rating | Supports single-reflow assembly without moisture-induced popcorn failure |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive kick) |
| AEC-Q101 qualified variant available | HE3 suffix versions meet automotive-grade qualification for engine control and ADAS modules |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical industrial and telecom equipment |
Applications
| Automotive Power Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp spikes up to ±100 V. Use Value: Limits voltage seen by MCU and CAN transceivers to ≤275 V during ISO 7637-2 Pulse 5a, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end protection device on 4–20 mA current loop inputs, mounted before signal conditioning op-amps. Use Value: Absorbs 1500 W surges while maintaining <1.0 μA leakage at 170 V, preserving measurement accuracy and sensor interface integrity. |
| Telecom DC Power Feeds | Motor Drive Control Board Protection |
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced common-mode surges on distribution lines. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail relative to ground, clamping positive transients toward earth. Use Value: Withstands repetitive 10/1000 μs surges per ITU-T K.20/21, enabling compliance with GR-1089-CORE requirements. |
Use Scenario: Protecting gate drivers and bootstrap circuits in 3-phase inverter boards from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: Localized clamp on high-side driver supply rails to suppress dV/dt coupling from switching nodes. Use Value: Fast response (<1 ps) and 275 V clamping prevent false triggering or destruction of isolated gate drivers during IGBT/MOSFET commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge handling; suitable only for lower-energy transients or space-constrained layouts | Select when board area is limited and peak surge energy remains ≤600 W |
| SMCJ170CA-E3/57T | Bidirectional version; identical VWM (170 V), symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for differential bus protection (e.g., RS-485, CAN FD) where bidirectional clamping is mandatory |
Compared with SMCJ170A-E3/57T, SMBJ170A-E3/52T trades surge capacity for footprint reduction, while SMCJ170CA-E3/57T adds polarity symmetry at no clamping voltage penalty - making the latter essential for AC or bidirectional signal paths.
Availability
SMCJ170A-E3/57T is available at Aetrix Electronics and suitable for automotive power systems, industrial PLC I/O modules, telecom DC distribution, and motor drive control boards requiring stable component supply and full traceability.
Supply support for SMCJ170A-E3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom infrastructure where robustness against ISO 7637, IEC 61000-4-5, and lightning surge standards is mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ170A-E3/57T under standard surge conditions?
The SMCJ170A-E3/57T has a maximum clamping voltage (VC) of 275 V when subjected to a 10/1000 μs waveform at 5.5 A peak pulse current (IPPM). This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMCJ170A-E3/57T RoHS-compliant and lead-free?
Yes, the SMCJ170A-E3/57T carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. Its matte tin-plated terminals meet J-STD-002 solderability requirements, and the molding compound complies with UL 94 V-0 flammability rating - verified in Vishay Document Number 88394, Revision 09-Jan-2024.
Can the SMCJ170A-E3/57T be used in automotive applications?
The base SMCJ170A-E3/57T is commercial-grade, but Vishay offers the AEC-Q101 qualified variant SMCJ170AHE3_A/H with identical electrical specs. For automotive use, specify the HE3 suffix; the SMCJ170A-E3/57T itself is not AEC-Q101 certified, though its thermal and surge performance supports under-hood ambient conditions up to +150 °C junction temperature.
What is the recommended PCB pad layout for optimal thermal and surge performance of the SMCJ170A-E3/57T?
Vishay specifies mounting the SMCJ170A-E3/57T on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W PPPM and 6.5 W steady-state dissipation. Smaller pads reduce thermal conduction and surge current handling - derating curves in Figure 2 of Document 88394 quantify performance loss above 25 °C ambient based on actual copper area.
How does the temperature coefficient affect the SMCJ170A-E3/57T's clamping behavior across its operating range?
The SMCJ170A-E3/57T has a VBR temperature coefficient of +0.108 %/°C, meaning breakdown voltage increases linearly with junction temperature. At +125 °C, VBR rises ~10.8% above its 25 °C value (189–209 V), shifting clamping onset higher - a design consideration for high-temperature environments where earlier clamping may be needed, potentially requiring derating or supplemental protection.
SMCJ170A-E3/57T 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-E3/57T FAQ
1.How can I place an order for SMCJ170A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170A-E3/57T 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 SMCJ170A-E3/57T reliable?
The price and inventory of SMCJ170A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170A-E3/57T?
SMCJ170A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170A-E3/57T 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 SMCJ170A-E3/57T?
For technical support, including SMCJ170A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170A-E3/57T requirements.
6.How does Aetrix verify that SMCJ170A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170A-E3/57T 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 SMCJ170A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170A-E3/57T?
All SMCJ170A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170A-E3/57T, 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 SMCJ170A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ170A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170A-E3/57T Tags
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