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Vishay General Semiconductor - Diodes Division SMCJ170A-M3/57T
- Part No.:
- SMCJ170A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170A-M3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,740
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Product details
Overview
SMCJ170A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 170 V standoff voltage (VWM), 275 V clamping voltage (VC) at 5.5 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in industrial motor drives and automotive power modules against inductive switching transients.
For engineers reviewing the SMCJ170A-M3/57T datasheet, SMCJ170A-M3/57T pinout, SMCJ170A-M3/57T application, or SMCJ170A-M3/57T equivalent, key selection criteria include verified clamping performance under 10/1000 µs surge, halogen-free RoHS-compliant construction (M3 suffix), and thermal resistance (RθJA = 75 °C/W) for board-level thermal design validation.
Technical Context
The SMCJ170A-M3/57T employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced surges, with low incremental surge resistance ensuring stable clamping across repetitive events. Its unidirectional polarity uses a cathode band marking and supports DC-biased protection paths in power supply rails and gate drive circuits.
Rated for operation from –55 °C to +150 °C, it meets MSL level 1 per J-STD-020 (peak reflow 260 °C) and delivers 200 A non-repetitive forward surge capability (IFSM) - critical for protecting high-side switches during load dump events in 24 V automotive systems.
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 mA - guaranteed breakdown threshold ensures reliable turn-on margin above VWM |
| VC @ IPPM | 275 V at 5.5 A - clamping voltage limits downstream device stress during 10/1000 µs surge |
| PPPM | 1500 W - peak pulse power handling defines surge energy absorption capacity |
| IFSM | 200 A - single half-sine surge rating enables robust protection of MOSFET gates during inductive turn-off |
| TJ max | +150 °C - junction temperature limit supports operation in enclosed industrial enclosures |
| RθJA | 75 °C/W - thermal resistance informs minimum copper pad area (8.0 mm × 8.0 mm) for safe power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002. Cathode marked by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to protected circuit ground or low-side return path for unidirectional clamping |
| Cathode | Current exit terminal in forward bias; high-impedance node in reverse standby | Connected to line/voltage rail being protected; band identifies this terminal physically |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables automated placement in space-constrained PCB layouts without height interference |
| Glass-passivated junction | Ensures long-term reliability and stable VBR drift <0.1 %/°C over lifetime |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance in industrial control inputs |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental requirements for EU and global OEM automotive and industrial programs |
| MSL Level 1 rating | Allows direct placement on PCB without baking, reducing manufacturing overhead |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
Use Scenario: Protection of IGBT gate drivers against voltage spikes induced by rapid bus voltage transitions during PWM switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate and emitter to clamp negative-going transients below –5 V. Use Value: Limits gate-source voltage excursion to ≤ ±275 V, preventing IGBT latch-up or oxide damage during 10/1000 µs surges up to 1500 W. | Use Scenario: Load-dump suppression on 24 V battery-fed ECUs in commercial vehicles per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping device on main power input rail, positioned upstream of DC/DC converter. Use Value: Clamps 120 V/350 ms load-dump event to ≤275 V, allowing downstream regulators to maintain regulation without shutdown. |
| Telecom Power Supplies | Sensor Signal Conditioning |
Use Scenario: Input-stage surge protection for AC/DC front-ends in outdoor base station power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense on bulk DC bus (48 V nominal), absorbing multi-kW transients before filtering stages. Use Value: Withstands ≥1000 surges at 80 % of rated PPPM, maintaining VC stability within ±3 % over life. | Use Scenario: Protection of analog front-end inputs (e.g., thermocouple, RTD) in industrial PLC analog I/O modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on differential signal pair referenced to local ground. Use Value: Adds <1 pF junction capacitance at 0 V bias, preserving signal integrity up to 1 MHz while limiting ESD to <275 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-M3 | Lower PPPM (600 W), same VWM/VC, SMB (DO-214AA) package | Reduced surge margin; suitable only for lower-energy environments (e.g., consumer-grade sensors) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 Level 3. |
| SMCJ170CA-M3/57T | Bidirectional version; identical VWM, VC, and PPPM; no polarity marking | Required for AC-coupled or floating signal lines where bidirectional clamping is mandatory | Choose for RS-485, CAN, or Ethernet PHY protection where symmetric transient immunity is needed. |
Compared with SMBJ170A-M3 and SMCJ170CA-M3/57T, the SMCJ170A-M3/57T provides optimal balance of high-energy clamping (1500 W), unidirectional polarity for DC rail protection, and industry-standard SMC footprint-making it preferred for industrial and automotive power interface designs requiring proven surge margin.
Availability
SMCJ170A-M3/57T is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, and telecom power supplies requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow compatibility.
Supply support for SMCJ170A-M3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and infrastructure power systems where robustness and long-term parametric stability are critical.
FAQ
What is the clamping voltage of the SMCJ170A-M3/57T under a 10/1000 µs surge?
The SMCJ170A-M3/57T has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMCJ170A-M3/57T maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is the SMCJ170A-M3/57T halogen-free and RoHS-compliant?
Yes, the SMCJ170A-M3/57T carries the M3 suffix, indicating it is both halogen-free and RoHS-compliant per EU Directive 2011/65/EU and Vishay's material categorization standard (doc?99912). Its molding compound meets UL 94 V-0 flammability rating, and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. The SMCJ170A-M3/57T is certified for use in environmentally regulated industrial and automotive programs.
What does the "57T" in SMCJ170A-M3/57T indicate?
The "57T" suffix denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, containing 850 units per reel. This format is optimized for high-speed automated pick-and-place assembly. The SMCJ170A-M3/57T uses industry-standard SMC (DO-214AB) carrier tape with EIA-481 compliance, enabling seamless integration into SMT production lines without custom feeder setup.
Can the SMCJ170A-M3/57T be used in automotive applications?
The SMCJ170A-M3/57T is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes (e.g., SMCJ170AHE3_A/H); the M3/57T variant is commercial-grade but widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails. Its 150 °C TJ max, 200 A IFSM, and robust surge rating make the SMCJ170A-M3/57T suitable for under-hood and cabin applications where AEC-Q101 is not mandated.
How does the SMCJ170A-M3/57T compare to bidirectional TVS diodes like SMCJ170CA-M3/57T?
The SMCJ170A-M3/57T is unidirectional and features a cathode band for polarity identification, making it ideal for DC-biased protection on positive rails. In contrast, the SMCJ170CA-M3/57T is bidirectional with no polarity marking and identical electrical specs (VWM, VC, PPPM). The SMCJ170A-M3/57T should be selected for single-polarity applications like 24 V supply inputs, whereas SMCJ170CA-M3/57T is required for AC or floating differential lines such as CAN or RS-485.
SMCJ170A-M3/57T 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 (SMC)
SMCJ170A-M3/57T FAQ
1.How can I place an order for SMCJ170A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ170A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170A-M3/57T?
SMCJ170A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170A-M3/57T 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-M3/57T?
For technical support, including SMCJ170A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170A-M3/57T requirements.
6.How does Aetrix verify that SMCJ170A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170A-M3/57T?
All SMCJ170A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ170A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170A-M3/57T Tags
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