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Vishay General Semiconductor - Diodes Division SMCJ170-E3/9AT
- Part No.:
- SMCJ170-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,839
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Product details
Overview
SMCJ170-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps transients to ≤275 V at 5.5 A peak pulse current (IPPM). It is widely used in automotive power line and industrial DC bus protection.
For engineers reviewing the SMCJ170-E3/9AT datasheet, SMCJ170-E3/9AT pinout, SMCJ170-E3/9AT application, or SMCJ170-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W surge rating with 10/1000 µs waveform, AEC-Q101 qualification, RoHS compliance, and DO-214AB thermal performance under high-temperature derating conditions.
Technical Context
The SMCJ170-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to ESD and lightning-induced transients. Its unidirectional configuration enables integration into DC power rails where reverse conduction must be blocked, and its low incremental surge resistance ensures stable clamping under repetitive surges.
Thermal design relies on mounting to 8.0 mm × 8.0 mm copper pads per terminal, achieving RθJA = 75 °C/W and RθJL = 15 °C/W. It supports continuous operation from –55 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
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 - Confirmed avalanche onset range ensuring reliable turn-on margin |
| VC @ IPPM | ≤275 V at 5.5 A - Clamped voltage during 10/1000 µs surge defines protected circuit stress level |
| PPPM | 1500 W - Peak transient energy handling capability under standardized surge waveform |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| IFSM | 200 A - Non-repetitive forward surge rating supporting inrush current tolerance in DC systems |
| Leakage ID | ≤1.0 µA at VWM - Minimal standby power loss and signal integrity preservation in high-impedance circuits |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 12 V/24 V supply); band-marked end for orientation verification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Glass passivated junction | Enhanced moisture resistance and long-term stability under humid or high-bias stress conditions |
| MSL Level 1 | Unlimited floor life and compatibility with standard 260 °C lead-free reflow without baking |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE |
Applications
| Automotive Power Line Protection | Industrial DC Bus Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump and alternator surge events per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO or MCU power stage. Use Value: Withstands 1500 W peak pulses and maintains ≤275 V clamping, preventing damage to downstream PMICs and microcontrollers rated for <30 V absolute maximum. | Use Scenario: Safeguarding 48 V telecom rectifier outputs and PLC I/O modules from inductive switching spikes. IC Role / Device Role / Timing Role: Primary surge suppression device mounted directly at DC input connector to shunt energy before bulk capacitance and isolation stages. Use Value: 170 V VWM aligns with 48 V nominal systems using 2× or 3× overvoltage margins; 1500 W rating handles multi-cycle surge events without degradation. |
| Consumer Power Adapter Input | Motor Drive Gate Driver Supply |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters and laptop AC/DC bricks exposed to mains coupling noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS on +20 V auxiliary bias rail feeding controller ICs and optocouplers. Use Value: 1.0 µA leakage at 170 V ensures minimal quiescent current impact; DO-214AB footprint allows compact layout near high-noise nodes. | Use Scenario: Protecting isolated gate driver supplies (e.g., 15 V bootstrap rails) in BLDC inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp placed across gate driver VDD and GND to prevent latch-up or oxide breakdown. Use Value: Sub-1 ns response time and low Rsurge limit voltage overshoot to safe levels for 3.3 V or 5 V logic-level drivers. |
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-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy transients; not recommended for automotive load dump | Select when board space is constrained and surge energy is ≤400 W |
| SMCJ170AHE3/9AT | Identical electrical specs but AEC-Q101 qualified (HE3 suffix); same DO-214AB package | Required for automotive OEM designs requiring full qualification documentation and traceability | Choose HE3 version when automotive PPAP or AEC-Q101 certification is mandatory |
Compared with SMAJ170A-E3/61T, SMCJ170-E3/9AT delivers 3.75× higher surge power handling and superior thermal dissipation; versus SMCJ170AHE3/9AT, it offers identical protection performance at commercial-grade qualification-ideal for industrial and consumer applications where AEC-Q101 is not required.
Availability
SMCJ170-E3/9AT is available at Aetrix Electronics and suitable for automotive power line protection, industrial DC bus safeguarding, and consumer power adapter input circuits requiring stable component supply and long-lifecycle support.
Supply support for SMCJ170-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized performance.
The SMCJ series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where failure resilience and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMCJ170-E3/9AT under a 10/1000 µs surge?
The SMCJ170-E3/9AT clamps to a maximum of 275 V when subjected to its rated peak pulse current of 5.5 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.31" × 0.31" copper pads), and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ170-E3/9AT maintains this clamping performance across its operational temperature range.
Is SMCJ170-E3/9AT suitable for automotive applications?
SMCJ170-E3/9AT is RoHS-compliant and manufactured in an AEC-Q101-qualified process flow, but the E3 suffix denotes commercial-grade qualification-not full AEC-Q101 certification. For designs requiring formal AEC-Q101 documentation and test reports, the SMCJ170AHE3/9AT variant must be selected. The SMCJ170-E3/9AT remains appropriate for non-OEM automotive subsystems where qualification is not mandated.
What does the "-E3/9AT" suffix indicate in SMCJ170-E3/9AT?
The "E3" suffix indicates RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This format ensures compatibility with high-speed SMT placement equipment and supports automated manufacturing workflows. The SMCJ170-E3/9AT is optimized for volume production environments requiring traceable, reflow-ready components.
How does SMCJ170-E3/9AT differ from bi-directional SMCJ170CA variants?
The SMCJ170-E3/9AT is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current-ideal for DC power rail protection. In contrast, SMCJ170CA is bi-directional, providing symmetrical clamping for AC lines or data buses subject to bipolar transients. They share identical VWM (170 V), PPPM (1500 W), and package (DO-214AB), but differ in polarity marking (band vs. no band) and leakage behavior. The SMCJ170-E3/9AT must not be substituted for CA types without circuit review.
What thermal derating applies to SMCJ170-E3/9AT above 25 °C ambient?
SMCJ170-E3/9AT follows Vishay's standard derating curve (Fig. 2): peak pulse power decreases linearly above TA = 25 °C, reaching ~75 % of 1500 W at 75 °C ambient and ~50 % at 125 °C. Derating is based on junction-to-ambient thermal resistance (RθJA = 75 °C/W) and assumes minimum recommended pad layout (8.0 mm × 8.0 mm copper per terminal). For sustained high-temperature operation, thermal simulation or empirical testing with the SMCJ170-E3/9AT is recommended.
SMCJ170-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- 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)
SMCJ170-E3/9AT FAQ
1.How can I place an order for SMCJ170-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170-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 SMCJ170-E3/9AT reliable?
The price and inventory of SMCJ170-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 SMCJ170-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170-E3/9AT?
SMCJ170-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170-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 SMCJ170-E3/9AT?
For technical support, including SMCJ170-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170-E3/9AT requirements.
6.How does Aetrix verify that SMCJ170-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170-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 SMCJ170-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170-E3/9AT?
All SMCJ170-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170-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 SMCJ170-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170-E3/9AT Tags
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