My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ170A-M3/9AT
- Part No.:
- SMCJ170A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170A-M3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,264
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ170A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, featuring 170 V stand-off voltage (VWM), 275 V maximum clamping voltage (VC) at 5.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial power supplies and automotive ECUs.
For engineers reviewing the SMCJ170A-M3/9AT datasheet, SMCJ170A-M3/9AT pinout, SMCJ170A-M3/9AT application, or SMCJ170A-M3/9AT equivalent, this page delivers verified electrical parameters, thermal derating behavior, junction-to-lead resistance, polarity marking convention, and halogen-free RoHS-compliant sourcing status per JESD201 Class 2 whisker testing.
Technical Context
The SMCJ170A-M3/9AT uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and low incremental surge resistance, enabling effective clamping of high-energy transients before downstream components are damaged. Its unidirectional configuration provides cathode-band polarity identification and supports DC-biased protection paths.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile and delivers 75 °C/W junction-to-ambient thermal resistance under standard PCB layout conditions.
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 1.0 mA test current - Confirmed breakdown threshold range for design margining |
| VC @ IPPM | 275 V at 5.5 A - Clamped voltage during full 1500 W transient, defining protected circuit stress level |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance supporting thermal design with minimal heatsinking |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 0.320" body length and cathode band marking |
Pinout & Package
SMCJ170A-M3/9AT is housed in the SMC (DO-214AB) package: a rectangular surface-mount case with matte tin-plated leads, 0.320" (8.13 mm) maximum length, and cathode band marking on the unidirectional variant. Polarity is defined by the band indicating the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional TVS configuration | Connected to ground or low-impedance return path; carries full surge current during clamping |
| Cathode | High-side connection with polarity band marking | Connected to protected line (e.g., 170 V rail); defines directionality and clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | M3 suffix confirms halogen-free molding compound and lead finish meeting JEDEC J-STD-020 and JESD201 Class 2 |
| Low incremental surge resistance | Enables tighter clamping voltage window (VC − VBR) for improved system-level ESD/EMI immunity |
| AEC-Q101 qualification option | HM3 suffix variants available for automotive-grade reliability; SMCJ170A-M3/9AT is commercial-grade but shares identical die and package |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing on 170 V DC rails without derating |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against back-EMF spikes from 48 V BLDC motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side FET gate and source, clamping negative-going transients within 1 ps. Use Value: Prevents latch-up in 3.3 V logic interfaces while maintaining 170 V DC bus integrity during load dump events. | Use Scenario: Safeguarding CAN transceiver supply lines and LIN bus inputs from battery load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V/24 V subsystem rails, absorbing up to 1500 W pulses without degradation. Use Value: Eliminates need for additional series impedance or filtering, preserving signal rise time on 500 kbps CAN FD links. |
| Telecom Power Rectifiers | Renewable Energy Inverters |
Use Scenario: Secondary-side overvoltage suppression on AC/DC front-end rectifier outputs feeding PoE PSE controllers. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, triggered only during positive overvoltage excursions above 170 V. Use Value: Maintains UL 60950-1 creepage clearance while achieving <10 ns response to 6 kV ring wave transients. | Use Scenario: DC-link surge protection in string inverters exposed to lightning-induced transients on PV array inputs. IC Role / Device Role / Timing Role: High-energy TVS mounted directly across 1500 V DC bus capacitors, rated for repeated 10/1000 µs surges. Use Value: Extends capacitor lifetime by limiting voltage overshoot to ≤275 V during 20 kA lightning strikes per IEC 62305. |
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-M3/57T | Lower PPPM (600 W), SMB package (DO-214AA), 50 % smaller footprint | Suitable for space-constrained consumer electronics; insufficient for industrial 1500 W surge requirements | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 2 |
| SMCJ170CA-M3/9AT | Bidirectional variant with same VWM/VC, symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) | Choose for differential or AC-biased protection where polarity reversal must be suppressed |
Compared with SMBJ170A-M3/57T and SMCJ170CA-M3/9AT, the SMCJ170A-M3/9AT uniquely balances 1500 W surge capacity, unidirectional DC rail compatibility, and halogen-free commercial-grade manufacturability-making it optimal for high-reliability 170 V DC systems where asymmetric overvoltage risk dominates.
Availability
SMCJ170A-M3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, telecom power rectifiers, and renewable energy inverters requiring stable component supply with traceable halogen-free sourcing.
Supply support for SMCJ170A-M3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMCJ series was developed for high-energy transient suppression in harsh environments, targeting 1500 W surge capability in compact SMC packages for industrial, automotive, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of SMCJ170A-M3/9AT at its rated peak pulse current?
The SMCJ170A-M3/9AT has a maximum clamping voltage (VC) of 275 V at its rated peak pulse current of 5.5 A using the 10/1000 µs waveform. This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuits during worst-case transients. The SMCJ170A-M3/9AT maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is SMCJ170A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SMCJ170A-M3/9AT itself is a commercial-grade part with M3 halogen-free RoHS compliance but not AEC-Q101 qualified. However, Vishay offers the functionally identical SMCJ170A-HM3/9AT variant, which carries the HM3 suffix denoting AEC-Q101 qualification, same SMC package, and identical electrical characteristics. For automotive designs requiring certified reliability, specify the HM3 version-not the M3-while retaining full PCB compatibility.
How does the SMCJ170A-M3/9AT differ from bidirectional SMCJ170CA-M3/9AT in circuit implementation?
The SMCJ170A-M3/9AT is unidirectional and features a cathode band for polarity orientation, making it suitable for DC rail protection where only positive overvoltage events occur. In contrast, the SMCJ170CA-M3/9AT is bidirectional with no polarity marking and clamps symmetrically in both directions-required for AC lines or floating differential signals. Both share identical VWM (170 V), VC (275 V), and PPPM (1500 W), but their circuit placement and grounding strategy differ fundamentally. The SMCJ170A-M3/9AT must be oriented with cathode toward the protected line.
What is the thermal resistance from junction to lead (RθJL) for SMCJ170A-M3/9AT, and why does it matter?
The SMCJ170A-M3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, measured under standard test conditions. This parameter quantifies how effectively heat generated during surge conduction transfers from the silicon die to the PCB copper via the leads. A low RθJL enables efficient thermal dissipation without external heatsinks-critical for repeated surge events in enclosed enclosures. It directly informs layout decisions such as pad size and copper pour area adjacent to the SMCJ170A-M3/9AT terminals.
Can SMCJ170A-M3/9AT be used in parallel to increase surge current handling?
No-SMCJ170A-M3/9AT should not be paralleled to increase surge current capacity. Due to process variations in breakdown voltage (VBR tolerance of 189 V to 209 V), uneven current sharing will occur during transients, causing one device to absorb most of the energy and likely fail prematurely. For higher energy requirements, select a single higher-rated device (e.g., SMCJ188A-M3/9AT) or implement staged protection with upstream current-limiting impedance. The SMCJ170A-M3/9AT is characterized and guaranteed only for standalone operation per Vishay's datasheet conditions.
SMCJ170A-M3/9AT 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 (SMC)
SMCJ170A-M3/9AT FAQ
1.How can I place an order for SMCJ170A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCJ170A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170A-M3/9AT?
SMCJ170A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170A-M3/9AT 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-M3/9AT?
For technical support, including SMCJ170A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ170A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170A-M3/9AT?
All SMCJ170A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170A-M3/9AT 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 …
