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Vishay General Semiconductor - Diodes Division SMCJ170HE3/9AT
- Part No.:
- SMCJ170HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170HE3/9AT.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,652
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Product details
Overview
SMCJ170HE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, rated for 170 V standoff voltage (VWM), 189–209 V breakdown (VBR), 275 V clamping voltage (VC) at 5.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial power electronics.
For engineers reviewing the SMCJ170HE3/9AT datasheet, SMCJ170HE3/9AT pinout, SMCJ170HE3/9AT application, or SMCJ170HE3/9AT equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, and 13" tape-and-reel packaging for high-volume SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 μA leakage at 170 V), but triggers into low-impedance conduction when reverse voltage exceeds its 189–209 V breakdown range, limiting transient energy via controlled avalanche. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal, the device delivers 1500 W peak pulse power handling with a 10/1000 μs waveform, and maintains operation across –55 °C to +150 °C junction temperature range - critical for under-hood automotive modules and industrial motor drives.
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 - guaranteed breakdown range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 275 V - clamped voltage at 5.5 A peak pulse current; determines maximum stress on downstream circuitry |
| PPPM | 1500 W - peak transient power dissipation capability with 10/1000 μs waveform |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; requires adequate PCB copper area for thermal management |
| TJ max | +150 °C - maximum allowable junction temperature; supports under-hood and high-temp industrial use |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
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. Polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to ground or lower-potential rail; forms shunt path during overvoltage events |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., 170 V supply rail); avalanche conduction initiates here during transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and immunity to humidity-induced parameter drift over lifetime |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power supplies |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance; suitable for high-reliability industrial deployments |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 170 V DC bus lines in 48 V mild-hybrid vehicle power distribution modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly across bus rails to clamp voltage excursions above 275 V within nanoseconds. Use Value: Prevents destruction of IGBT gate drivers and MCU power supplies during 120 V/100 ms load dump events per ISO 16750-2. | Use Scenario: Safeguarding analog sensor inputs (e.g., current sense amplifiers) on variable-frequency drives exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential signal lines, suppressing ±275 V spikes without affecting 0–5 V measurement range. Use Value: Maintains signal integrity and avoids ADC saturation or latch-up during 1500 W surge events with <1 ns response time. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment via outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground on negative rail to absorb positive-going transients only. Use Value: Limits clamped voltage to 275 V while sustaining 1500 W peak power - exceeding ITU-T K.20/21 surge immunity requirements. | Use Scenario: Shielding microcontroller GPIOs and isolated gate driver supplies in solar string inverters subjected to grid-switching transients and PV array arcing events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on auxiliary 170 V bias rails feeding optocouplers and level-shifters. Use Value: Enables compliance with IEC 61000-4-5 (10/1000 μs, 2 kV) without additional series impedance or filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3/9AT | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR/VC ratings | Not suitable for 1500 W surge environments; limited to low-energy signal-line protection | Select only if board space constraints prohibit DO-214AB and surge energy is ≤400 W |
| SMCJ170A-E3/9AT | Same electrical specs and DO-214AB package, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Lacks automotive qualification; unsuitable for safety-critical or under-hood deployment | Choose for cost-sensitive industrial controls where AEC-Q101 is not mandated |
Compared with SMCJ170HE3/9AT, SMAJ170AHE3/9AT sacrifices 73 % peak power handling for 40 % smaller footprint, while SMCJ170A-E3/9AT retains identical surge capability but omits automotive qualification - making SMCJ170HE3/9AT the sole choice for AEC-Q101–mandated 1500 W protection.
Availability
SMCJ170HE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, and telecom DC power feeds requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCJ170HE3/9AT 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 high-reliability, high-power, and automotive-qualified components.
The SMCJ series was engineered specifically for robust transient suppression in harsh environments - delivering consistent clamping performance, low leakage, and extended thermal survivability for mission-critical power and signal lines.
FAQ
What is the clamping voltage of SMCJ170HE3/9AT and why does it matter?
The SMCJ170HE3/9AT has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current. This value defines the highest voltage that will appear across protected circuitry during a transient event - critical for ensuring downstream components like MOSFETs or MCUs remain below their absolute maximum voltage ratings. Exceeding VC risks permanent damage even if the TVS itself survives.
Is SMCJ170HE3/9AT suitable for automotive applications?
Yes, SMCJ170HE3/9AT is AEC-Q101 qualified and designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and validation across temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS power supplies where reliability under thermal and electrical stress is mandatory.
How does the HE3 suffix differ from E3 in SMCJ170HE3/9AT?
The HE3 suffix indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas E3 denotes commercial-grade RoHS compliance only (Class 1A whisker test). SMCJ170HE3/9AT is certified for automotive and high-reliability industrial use; SMCJ170A-E3/9AT lacks the automotive qualification and is intended for less demanding environments.
What PCB layout considerations apply to SMCJ170HE3/9AT?
Per Vishay's datasheet, SMCJ170HE3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power. Narrow traces or insufficient copper area increase thermal resistance, causing junction overheating and premature failure during repeated surges. Thermal vias under pads further improve heat dissipation in multilayer boards.
Can SMCJ170HE3/9AT be used in bi-directional configurations?
No - SMCJ170HE3/9AT is unidirectional, indicated by the "A" suffix (not "CA"). It conducts only when cathode voltage exceeds anode by >189 V. For bi-directional protection (e.g., AC lines or differential signals), SMCJ170CA variants must be used. Using SMCJ170HE3/9AT in reverse-biased configurations beyond its 170 V standoff risks catastrophic failure.
SMCJ170HE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170HE3/9AT FAQ
1.How can I place an order for SMCJ170HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170HE3/9AT 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 SMCJ170HE3/9AT reliable?
The price and inventory of SMCJ170HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170HE3/9AT?
SMCJ170HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170HE3/9AT 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 SMCJ170HE3/9AT?
For technical support, including SMCJ170HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170HE3/9AT requirements.
6.How does Aetrix verify that SMCJ170HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170HE3/9AT 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 SMCJ170HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170HE3/9AT?
All SMCJ170HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170HE3/9AT, 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 SMCJ170HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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