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Vishay General Semiconductor - Diodes Division SMCJ170CAHE3/9AT
- Part No.:
- SMCJ170CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CAHE3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,764
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Product details
Overview
SMCJ170CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 170 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), and clamps transients to ≤275 V at 5.5 A IPPM - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ170CAHE3/9AT datasheet, SMCJ170CAHE3/9AT pinout, SMCJ170CAHE3/9AT application, or SMCJ170CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced transients, leveraging an avalanche breakdown mechanism with low incremental surge resistance. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints.
Thermally, it sustains 150 °C junction temperature with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation under repeated 10/1000 μs surges when mounted per recommended pad layout. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
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 mA - guaranteed breakdown threshold range for design margining |
| VC @ IPPM | ≤275 V at 5.5 A - clamping voltage under full 1500 W surge, defining protected circuit stress |
| PPPM | 1500 W - peak transient energy absorption capability with 10/1000 μs waveform |
| ID @ VWM | ≤1.0 μA - leakage current level ensuring minimal standby power loss |
| TJ max | 150 °C - maximum junction temperature supporting under-hood automotive deployment |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height |
Pinout & Package
SMCJ170CAHE3/9AT uses the SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, rated MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts positive or negative transients - no orientation required during placement |
| Case (cathode band absent) | Non-polarized termination | Absence of band confirms bidirectional construction; terminals are electrically interchangeable |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns or baking requirements |
| Glass passivated junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across input rail to shunt surge energy before reaching LDOs or MCU pins. Use Value: Clamps 170 V stand-off transients to ≤275 V while absorbing 1500 W pulses - preventing latch-up or gate oxide damage in automotive SoCs. | Use Scenario: Safeguarding isolated gate drivers and position feedback circuits in variable-frequency drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on encoder signal lines and auxiliary power inputs to suppress coupled EMI from IGBT commutation. Use Value: Symmetrical clamping eliminates need for polarity-aware routing, reducing PCB layer count and layout complexity in compact drive modules. |
| Telecom DC Power Interface | Consumer Appliance Mainboard Input |
Use Scenario: Securing PoE-powered Ethernet switches and base station RF modules against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with upstream fuses and secondary-stage polymer PTCs. Use Value: 170 V VWM matches telecom nominal supply; 1500 W rating exceeds IEC 61000-4-5 Class 3 requirement (2 kV line-to-ground). | Use Scenario: Hardening AC-DC adapter outputs and microcontroller supply rails in smart home hubs and HVAC controllers against ESD and mains transients. IC Role / Device Role / Timing Role: Final-stage surge clamp after bulk filtering, placed adjacent to sensitive logic ICs to limit residual overshoot. Use Value: Low leakage (<1 μA) avoids standby current penalties; AEC-Q101 qualification ensures field reliability beyond consumer-grade alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CAHE3/A | Lower PPPM (400 W), same VWM and bidirectional configuration, SMA package (smaller footprint, lower thermal mass) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not full lightning surge) | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ170AHE3/9AT | Unidirectional version with cathode band marking; otherwise identical VWM, VBR, and PPPM ratings | Requires polarity-aware PCB layout; used where DC bias prevents negative transients (e.g., regulated 12 V output rails) | Choose only if system topology guarantees unidirectional surge exposure and polarity can be reliably maintained. |
Compared with SMAJ170CAHE3/A and SMCJ170AHE3/9AT, the SMCJ170CAHE3/9AT uniquely delivers 1500 W bidirectional clamping in automotive-qualified SMC packaging - making it the sole option for high-energy, polarity-agnostic surge protection in space-constrained automotive and industrial environments.
Availability
SMCJ170CAHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom power interfaces requiring stable component supply with AEC-Q101 assurance and full 1500 W surge capability.
Supply support for SMCJ170CAHE3/9AT 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 designs discrete semiconductors for power management, signal integrity, and circuit protection - emphasizing ruggedness, precision, and automotive-grade reliability.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness against load dump, ESD, and lightning surges is mandatory.
FAQ
What is the clamping voltage of SMCJ170CAHE3/9AT at its rated peak pulse current?
The SMCJ170CAHE3/9AT clamps to a maximum of 275 V at its specified peak pulse current of 5.5 A (10/1000 μs waveform). This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads per Vishay's recommended layout - critical for achieving the rated 1500 W surge capability. Exceeding thermal limits or using inadequate PCB copper will degrade clamping performance.
Is SMCJ170CAHE3/9AT suitable for automotive applications?
Yes, SMCJ170CAHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the HE3 suffix. It meets requirements for under-hood and cabin electronics including engine control units, body control modules, and ADAS sensor interfaces. Its 1500 W surge rating, 150 °C junction rating, and MSL Level 1 reflow compatibility make it appropriate for production automotive systems requiring validated reliability.
How does the bidirectional configuration of SMCJ170CAHE3/9AT affect PCB layout?
The bidirectional configuration of SMCJ170CAHE3/9AT eliminates polarity constraints: no cathode band marking is present, and either terminal may connect to any side of the protected line. This simplifies layout by removing orientation checks during automated placement and enables symmetric routing on differential or AC-coupled signal paths - unlike unidirectional variants such as SMCJ170AHE3/9AT which require strict cathode alignment.
What is the maximum reverse leakage current for SMCJ170CAHE3/9AT at its stand-off voltage?
The maximum reverse leakage current (ID) for SMCJ170CAHE3/9AT is 1.0 μA at its 170 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal impact on standby power consumption in battery-backed or energy-sensitive systems. Leakage increases with temperature but remains below 5 μA up to 85 °C ambient, per Vishay's derating curves in Document 88394.
Can SMCJ170CAHE3/9AT replace SMCJ170AHE3/9AT in an existing design?
No direct replacement is assured: SMCJ170CAHE3/9AT is bidirectional while SMCJ170AHE3/9AT is unidirectional. Swapping requires verifying that the circuit experiences no sustained DC bias that would forward-bias one direction of the bidirectional device. Layout must also remove cathode band orientation constraints. Electrical parameters (VWM, VBR, PPPM) match closely, but functional equivalence depends entirely on system-level polarity behavior - validation testing is mandatory before substitution.
SMCJ170CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170CAHE3/9AT FAQ
1.How can I place an order for SMCJ170CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CAHE3/9AT 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 SMCJ170CAHE3/9AT reliable?
The price and inventory of SMCJ170CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CAHE3/9AT?
SMCJ170CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CAHE3/9AT 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 SMCJ170CAHE3/9AT?
For technical support, including SMCJ170CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ170CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170CAHE3/9AT 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 SMCJ170CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170CAHE3/9AT?
All SMCJ170CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CAHE3/9AT, 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 SMCJ170CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CAHE3/9AT Tags
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