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Vishay General Semiconductor - Diodes Division SMCJ170CAHM3/I
- Part No.:
- SMCJ170CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CAHM3/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
SMCJ170CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 170 V standoff voltage (VWM), 275 V clamping voltage (VC) at 5.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive ECUs, industrial motor drives, and telecom power supplies.
For engineers reviewing the SMCJ170CAHM3/I datasheet, SMCJ170CAHM3/I pinout, SMCJ170CAHM3/I application, or SMCJ170CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per HM3 suffix - critical for automotive-grade reliability and PCB assembly compatibility.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its reverse standoff voltage (VWM = 170 V). Its bidirectional architecture ensures symmetrical clamping in both polarities, eliminating polarity sensitivity in AC-coupled or floating lines.
It delivers 1500 W peak pulse power handling under standardized 10/1000 μs surge conditions, with low incremental surge resistance enabling effective energy diversion without thermal runaway. Junction temperature is rated from –55 °C to +150 °C, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 275 V - clamped voltage during 5.5 A 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient energy absorption capability per IEC 61000-4-5 |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, defining derating above 25 °C |
| TJ max. | +150 °C - maximum junction temperature, enabling use in high-ambient automotive zones |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
| Compliance | AEC-Q101 qualified & halogen-free RoHS (HM3 suffix) - certified for automotive electronics |
Pinout & Package
SMCJ170CAHM3/I uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking; terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path; identical clamping behavior in both directions |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing the symmetrical TVS junction; no polarity dependency in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and supports lead-free reflow (260 °C peak) |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 48 V systems |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH - eliminates bake requirements prior to SMT assembly |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V/48 V battery-fed microcontrollers and CAN transceivers from load dump and alternator surges. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and ground, triggered only during overvoltage events. Use Value: Clamps transients to ≤275 V while absorbing 1500 W, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Safeguarding IGBT gate drivers and position feedback circuits in variable-frequency drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across isolated DC link sensing lines and encoder interfaces. Use Value: Symmetrical clamping ensures consistent protection regardless of signal polarity reversal during motor commutation. |
| Telecom AC/DC Front-End | Renewable Energy Inverter Monitoring |
Use Scenario: Shielding AC-input rectifier outputs and DC bus monitoring circuits in PoE injectors and base station PSUs. IC Role / Device Role / Timing Role: Parallel-connected TVS on secondary-side DC rails to suppress coupling from primary-side surges. Use Value: 170 V VWM aligns with 24–48 V nominal telecom rails, allowing normal operation while blocking >275 V spikes. | Use Scenario: Protecting voltage/current sense inputs on solar inverter MPPT controllers subjected to lightning-induced surges on PV string wiring. IC Role / Device Role / Timing Role: High-power transient clamp on analog front-end inputs interfacing with isolation amplifiers. Use Value: 1500 W PPPM rating handles multi-kA induced surges common in outdoor photovoltaic installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170CA | Same VWM (170 V) and VC (275 V), but lower PPPM (600 W); SOD-123FL package | Limited to low-energy signal-line protection; unsuitable for power rail duty cycles | Select only for space-constrained, low-surge environments where 1500 W headroom is unnecessary |
| SMCJ170CAHE3/I | Identical electrical specs, but RoHS-compliant commercial grade (HE3) without AEC-Q101 or halogen-free certification | Approved for industrial/commercial use only; not validated for automotive qualification testing | Choose when automotive qualification is not required and cost optimization is prioritized |
Compared with SAC170CA and SMCJ170CAHE3/I, the SMCJ170CAHM3/I uniquely combines full AEC-Q101 qualification, halogen-free compliance, and 1500 W surge capacity in the robust SMC package - making it the sole option for production automotive power rail designs requiring zero-rework reliability.
Availability
SMCJ170CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power supply validation requiring stable component supply across extended production lifecycles.
Supply support for SMCJ170CAHM3/I 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 application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments; engineered for automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMCJ170CAHM3/I at its rated peak pulse current?
The SMCJ170CAHM3/I has a maximum clamping voltage (VC) of 275 V when subjected to its specified peak pulse current (IPPM) of 5.5 A under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ170CAHM3/I maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMCJ170CAHM3/I qualified for automotive applications?
Yes, the SMCJ170CAHM3/I carries AEC-Q101 qualification, verified through accelerated stress testing including HTGB, HTRB, and temperature cycling. Its HM3 suffix explicitly denotes halogen-free, RoHS-compliant construction meeting automotive material requirements. This makes the SMCJ170CAHM3/I suitable for deployment in engine control units, body electronics, and ADAS modules where long-term reliability under thermal and mechanical stress is mandatory.
What does the "CA" suffix indicate in SMCJ170CAHM3/I?
The "CA" suffix in SMCJ170CAHM3/I designates a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SMCJ170AHM3/I), the CA version has no polarity marking and functions identically regardless of voltage polarity across its terminals, simplifying layout for AC-coupled, differential, or floating signal paths.
How does the SMCJ170CAHM3/I thermal performance compare to smaller packages?
The SMCJ170CAHM3/I exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads - significantly lower than SOD-123 or SMA packages. This enables higher sustained power dissipation and better surge repetition capability. For example, at 25 °C ambient, the SMCJ170CAHM3/I can handle repeated 1500 W pulses with adequate cooling, whereas smaller packages would thermally saturate after one event.
Can SMCJ170CAHM3/I replace SMCJ170A in an existing design?
No - SMCJ170CAHM3/I is bidirectional, while SMCJ170AHM3/I is unidirectional. Substituting them requires verifying circuit polarity and clamping behavior: the CA version clamps equally in both directions, whereas the A version only clamps in reverse bias and conducts forward like a diode. Using SMCJ170CAHM3/I in place of SMCJ170AHM3/I may cause unintended conduction or fail to protect forward-biased transients. Always validate layout and signal integrity before interchange.
SMCJ170CAHM3/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ170CAHM3/I FAQ
1.How can I place an order for SMCJ170CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CAHM3/I 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 SMCJ170CAHM3/I reliable?
The price and inventory of SMCJ170CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ170CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CAHM3/I?
SMCJ170CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CAHM3/I 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 SMCJ170CAHM3/I?
For technical support, including SMCJ170CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CAHM3/I requirements.
6.How does Aetrix verify that SMCJ170CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ170CAHM3/I 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 SMCJ170CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ170CAHM3/I?
All SMCJ170CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CAHM3/I, 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 SMCJ170CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ170CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CAHM3/I Tags
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