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Vishay General Semiconductor - Diodes Division SMCJ170CHE3/9AT
- Part No.:
- SMCJ170CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CHE3/9AT.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,589
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Product details
Overview
SMCJ170CHE3/9AT 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 standoff voltage (VWM), 189–209 V breakdown range (VBR), 1500 W peak pulse power (PPPM), and clamps transients to ≤275 V at 5.5 A IPPM. It is AEC-Q101 qualified and used in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCJ170CHE3/9AT datasheet, SMCJ170CHE3/9AT pinout, SMCJ170CHE3/9AT application, or SMCJ170CHE3/9AT equivalent, key selection criteria include unidirectional polarity, 170 V working voltage, 1500 W surge capability, RoHS-compliant AEC-Q101 qualification, and DO-214AB thermal performance with RθJA = 75 °C/W.
Technical Context
The SMCJ170CHE3/9AT operates as a silicon avalanche diode, responding to fast-rising transients (sub-nanosecond) via reverse-biased junction breakdown. Its glass-passivated chip junction ensures stable clamping under repetitive surges, and its low incremental surge resistance minimizes voltage overshoot during high-current events.
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power (10/1000 μs waveform) with derating above 25 °C ambient. The device sustains operation from −55 °C to +150 °C junction temperature and meets MSL Level 1 reflow requirements (260 °C 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 - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | ≤275 V - Clamped voltage at 5.5 A peak pulse current, limiting stress on downstream circuitry |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized 10/1000 μs surge |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on recommended PCB pad layout |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-214AB (SMCJ), molded epoxy case with matte tin-plated leads; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (cathode-banded end) | Connected to protected circuit ground or low-side return; reverse-biased during normal operation |
| Cathode | Clamping node (banded end) | Connected to protected line (e.g., 12 V rail); conducts avalanche current when VLINE exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under surge stress |
| Low incremental surge resistance | Minimizes dynamic voltage rise during high di/dt transients, improving clamping precision |
| MSL Level 1 rating | Enables standard SMT reflow without moisture-related popcorn failure |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS subsystems |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 grade with JESD 201 Class 2 whisker resistance for lead finish integrity |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges up to ISO 7637-2 Pulse 5a. Use Value: Limits voltage to ≤275 V during 1500 W transients, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding analog inputs of PLC I/O modules connected to field sensors exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end protection element on 4–20 mA or 0–10 V signal lines, absorbing induced common-mode transients. Use Value: Withstands repeated 10/1000 μs surges while maintaining <1 μA leakage at 170 V, preserving signal accuracy. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Guarding PoE-powered equipment (e.g., IP cameras) against surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan or endpoint PSE/PD power lines, rated for sustained 48 V operation. Use Value: 170 V VWM provides ample margin above 48 V nominal, enabling use in higher-voltage telecom systems without derating. | Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor inverters from commutation spikes. IC Role / Device Role / Timing Role: Localized suppression across MOSFET source-drain paths or bootstrap supply rails to prevent latch-up. Use Value: Fast response (<1 ns) and 275 V clamping limit dv/dt stress on 600 V-rated IGBTs and driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR range | Suitable for space-constrained consumer boards where 1500 W surge headroom is not required | Select when board area is limited and peak surge energy is ≤600 W |
| SMCJ170A-E3/9AT | Same electrical specs but commercial-grade (non-AEC-Q101), E3 suffix only | Applicable in industrial or computing systems where automotive qualification is unnecessary | Choose for cost-sensitive non-automotive designs requiring identical clamping performance |
Compared with SMCJ170CHE3/9AT, the SMBJ170AHE3/52T offers reduced surge capacity in a smaller footprint, while the SMCJ170A-E3/9AT provides identical protection without AEC-Q101 validation-enabling trade-offs between automotive compliance, power handling, and package size.
Availability
SMCJ170CHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom DC feed applications requiring stable component supply, AEC-Q101 traceability, and 1500 W transient immunity.
Supply support for SMCJ170CHE3/9AT 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 and automotive qualification.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments such as automotive power networks and industrial control systems.
FAQ
What is the maximum clamping voltage of the SMCJ170CHE3/9AT under surge conditions?
The SMCJ170CHE3/9AT clamps to a maximum of 275 V when subjected to its rated peak pulse current (IPPM) of 5.5 A under a 10/1000 μs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during transient events. The clamping voltage is guaranteed across the full operating temperature range and is critical for ensuring downstream components remain within safe voltage margins. SMCJ170CHE3/9AT maintains this performance due to its low incremental surge resistance and stable avalanche characteristics.
Is the SMCJ170CHE3/9AT suitable for automotive applications?
Yes, the SMCJ170CHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validated performance across −55 °C to +150 °C junction temperature. The HE3 suffix confirms AEC-Q101 qualification with JESD 201 Class 2 whisker resistance. SMCJ170CHE3/9AT is deployed in engine control units, body electronics, and ADAS modules where protection against load dump and ISO 7637-2 transients is required.
What does the "HE3" suffix indicate in SMCJ170CHE3/9AT?
The "HE3" suffix in SMCJ170CHE3/9AT denotes two key attributes: "H" signifies AEC-Q101 qualification, and "E3" indicates RoHS-compliant, matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade variants (e.g., SMCJ170A-E3/9AT) and confirms suitability for automotive and high-reliability industrial applications. The HE3 marking is verified per Vishay's material categorization policy and appears in official ordering information tables. SMCJ170CHE3/9AT data sheets list HE3 under mechanical and qualification notes.
How does the SMCJ170CHE3/9AT differ from bi-directional SMCJ170CA variants?
The SMCJ170CHE3/9AT is unidirectional, meaning it conducts only during reverse-bias overvoltage events and blocks forward current beyond its VF (~3.5 V at 100 A). In contrast, SMCJ170CA devices conduct symmetrically in both directions, making them suitable for AC line or data-line protection where polarity is undefined. SMCJ170CHE3/9AT has a cathode band for orientation; CA versions have no marking. Their VBR and VC values differ slightly due to dual-junction design. SMCJ170CHE3/9AT is selected when polarity is known and only positive transients require suppression.
What PCB layout guidance applies to the SMCJ170CHE3/9AT for optimal thermal performance?
For optimal thermal performance, the SMCJ170CHE3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. These pads reduce thermal resistance (RθJA = 75 °C/W) and sustain power dissipation during surge events. Traces should be short and wide to minimize inductance, and ground planes should be solid beneath the device. Avoid thermal reliefs on pads. The DO-214AB package's low RθJL (15 °C/W) relies on direct copper contact-SMCJ170CHE3/9AT performance degrades significantly if pad area or copper thickness falls below recommendations.
SMCJ170CHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170CHE3/9AT FAQ
1.How can I place an order for SMCJ170CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CHE3/9AT 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 SMCJ170CHE3/9AT reliable?
The price and inventory of SMCJ170CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CHE3/9AT?
SMCJ170CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CHE3/9AT 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 SMCJ170CHE3/9AT?
For technical support, including SMCJ170CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ170CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170CHE3/9AT 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 SMCJ170CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170CHE3/9AT?
All SMCJ170CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CHE3/9AT, 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 SMCJ170CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CHE3/9AT Tags
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