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Vishay General Semiconductor - Diodes Division SMCJ170CAHM3/H
- Part No.:
- SMCJ170CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CAHM3/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,043
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Product details
Overview
SMCJ170CAHM3/H 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 stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 275 V at 5.5 A IPPM, and operates from −55 °C to +150 °C - used in automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ170CAHM3/H datasheet, SMCJ170CAHM3/H pinout, SMCJ170CAHM3/H application, or SMCJ170CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 10/1000 µs surge waveforms in harsh environments.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance. Its bidirectional architecture enables symmetric clamping in AC-coupled or floating circuits without polarity constraints.
Rated for 1500 W peak pulse power per 10/1000 µs waveform and derated above 25 °C, it delivers stable clamping performance up to 150 °C junction temperature, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - supporting robust PCB-level thermal management on standard copper pads.
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 - breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 275 V at 5.5 A - clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak surge energy absorption capacity under standardized 10/1000 µs waveform |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - certified for automotive-grade reliability |
Pinout & Package
SMCJ170CAHM3/H is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case; both terminals are functionally symmetric for AC or floating-line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Reversible conduction path - conducts equally in either direction when V > VC |
| Case (cathode band absent) | Thermal and mechanical anchor | Exposed metal slug provides primary heat dissipation path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or ungrounded sensors without polarity concerns |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring extended temperature cycling and humidity resistance |
| Halogen-free construction | Meets IEC 61249-2-21 and JEDEC J-STD-208 for environmentally compliant manufacturing |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85 % RH - supports standard SMT assembly without dry-pack or baking |
| Low clamping ratio (VC/VWM) | 1.62 - tight margin between stand-off and clamping ensures minimal overvoltage exposure to protected ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge shunt device placed at board entry point before DC-DC converters and microcontrollers. Use Value: Clamps transients to ≤275 V while absorbing 1500 W, preventing latch-up or gate oxide damage in downstream MOSFETs and PMICs. | Use Scenario: Shielding analog front-ends of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamp on differential signal pairs (e.g., RS-485, CAN FD stubs) exposed to ESD and inductive switching noise. Use Value: Symmetric clamping preserves signal integrity across ±170 V common-mode range without adding DC bias or polarity dependency. |
| Telecom Line Card Surge Suppression | Renewable Energy Inverter DC Link |
Use Scenario: Safeguarding Ethernet PHYs and PoE controllers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) primary protection, handling residual fast-rising edges. Use Value: Sub-1 ns response time captures high-dI/dt components missed by slower protectors, reducing let-through energy to <10 mJ. | Use Scenario: Mitigating switching transients on photovoltaic string inputs feeding central inverters. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus capacitors to suppress voltage spikes from IGBT commutation. Use Value: 1500 W rating sustains repeated 10/1000 µs surges up to 1000× per hour without degradation, verified per AEC-Q101 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHM3 | Lower PPPM (600 W), SMB (DO-214AA) package, same VWM and clamping | Reduced surge margin; suitable only for lower-energy interfaces like USB or I²C | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 |
| SMCJ170AHE3 | Unidirectional version, identical VWM/VC/PPPM, RoHS-compliant but not halogen-free | Requires correct polarity placement; unsuitable for AC or floating nodes | Choose only for DC-biased rails where cathode orientation can be guaranteed and halogen content is unrestricted |
Compared with SMCJ170CAHM3/H, SMBJ170CAHM3 offers smaller footprint but half the surge capacity, while SMCJ170AHE3 trades bidirectionality and halogen-free status for commercial-grade compliance - making SMCJ170CAHM3/H the sole choice for AEC-Q101–mandated, polarity-agnostic, high-energy protection.
Availability
SMCJ170CAHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, telecom line cards, and renewable energy inverters requiring stable component supply with long-term lifecycle assurance.
Supply support for SMCJ170CAHM3/H 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, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMCJ series targets high-energy transient suppression in demanding environments - engineered for automotive, industrial, and telecom infrastructure where failure tolerance and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMCJ170CAHM3/H?
The "CA" suffix in SMCJ170CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMCJ170A), it has no cathode marking and functions identically regardless of voltage polarity - essential for protecting AC-coupled lines, differential buses, or floating sensor outputs without orientation constraints.
Is SMCJ170CAHM3/H qualified for automotive use?
Yes, SMCJ170CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HM3" suffix) and documentation. This qualification covers stress tests including temperature cycling, humidity bias HAST, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and vibration stress is mandatory.
What is the clamping voltage of SMCJ170CAHM3/H and why does it matter?
The clamping voltage (VC) of SMCJ170CAHM3/H is 275 V at 5.5 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value defines the maximum voltage imposed on protected circuitry during a surge event - a lower VC relative to VWM (170 V) ensures sensitive downstream components like microcontrollers or transceivers remain within safe operating limits during transient events.
How does the "HM3" suffix differ from "HE3" in Vishay's SMCJ series?
The "HM3" suffix in SMCJ170CAHM3/H indicates halogen-free, RoHS-compliant, and AEC-Q101–qualified construction, whereas "HE3" denotes RoHS-compliant and AEC-Q101–qualified but not halogen-free. Both meet automotive reliability standards, but HM3 satisfies stricter environmental requirements such as IEC 61249-2-21, making it preferred for markets mandating zero halogen content in printed circuit assemblies.
Can SMCJ170CAHM3/H replace SMCJ170AHE3 in an existing design?
No - SMCJ170CAHM3/H cannot directly replace SMCJ170AHE3 without layout review. While both share identical VWM (170 V), PPPM (1500 W), and package (SMC), SMCJ170AHE3 is unidirectional and requires correct cathode orientation, whereas SMCJ170CAHM3/H is bidirectional with no polarity marking. Swapping them may cause improper clamping on DC-biased lines or violate polarity-sensitive protection schemes unless the circuit is fully floating or AC-coupled.
SMCJ170CAHM3/H 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/H FAQ
1.How can I place an order for SMCJ170CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CAHM3/H 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/H reliable?
The price and inventory of SMCJ170CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ170CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CAHM3/H?
SMCJ170CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CAHM3/H 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/H?
For technical support, including SMCJ170CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CAHM3/H requirements.
6.How does Aetrix verify that SMCJ170CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ170CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMCJ170CAHM3/H?
All SMCJ170CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMCJ170CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CAHM3/H Tags
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