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Vishay General Semiconductor - Diodes Division SMCJ170AHM3/I
- Part No.:
- SMCJ170AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170AHM3/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,467
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Product details
Overview
SMCJ170AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 170 V standoff voltage (VWM), 275 V maximum clamping voltage (VC) at 5.5 A peak pulse current, and 1500 W peak pulse power rating for 10/1000 µs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive power systems against inductive switching transients.
For engineers reviewing the SMCJ170AHM3/I datasheet, SMCJ170AHM3/I pinout, SMCJ170AHM3/I application, or SMCJ170AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and SMC package thermal resistance of 15 °C/W junction-to-lead.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 170 V reverse standoff voltage and rapidly transitions to low-impedance conduction above its 189–209 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time under transient stress.
Designed for automated SMT assembly, it meets MSL level 1 per J-STD-020 with 260 °C peak reflow, features matte tin-plated leads compliant with J-STD-002, and delivers 1500 W surge capability on standard 8.0 mm × 8.0 mm copper pads - enabling robust protection without external heatsinking in space-constrained layouts.
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 at 1 mA - Ensures reliable turn-on margin above VWM with 10% tolerance |
| VC @ IPPM | 275 V at 5.5 A - Clamped voltage during full 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling for 10/1000 µs waveform per ANSI/IEEE C62.35 |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
| Qualification | AEC-Q101 qualified (HM3 suffix) - Validated for automotive-grade reliability and lifetime cycling |
Pinout & Package
SMCJ170AHM3/I uses the SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode indicated by a band on the body. The package measures 7.75 mm × 6.22 mm × 2.62 mm and mounts on 8.0 mm × 8.0 mm copper pads per terminal for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to system ground or common return path during transient suppression |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V rail or sensor output); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and full RoHS compliance for automotive supply chains |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power rails |
| Low incremental surge resistance | Enables tight clamping (275 V at 5.5 A) with minimal voltage overshoot during fast transients |
| Glass passivated junction | Provides stable reverse leakage (<1 µA at 170 V) and long-term parameter stability over temperature |
| MSL Level 1 | Supports lead-free reflow up to 260 °C without moisture-induced failure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V/24 V battery-fed ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 170 V. Use Value: Limits peak voltage to 275 V during 1500 W transients, protecting downstream PMICs and microcontrollers rated for ≤30 V absolute maximum. | Use Scenario: Guarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff protection element on 0–5 V or 4–20 mA signal paths exposed to ESD and relay-switching noise. Use Value: Sub-1 µA leakage at 170 V ensures no DC error injection; fast response prevents latch-up in precision ADC front-ends. |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Shielding high-side gate drivers in BLDC inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: TVS connected from gate-to-source of N-channel MOSFETs to absorb dv/dt-induced transients. Use Value: 1500 W rating handles repetitive switching surges; 15 °C/W RθJL allows direct PCB copper conduction without added thermal vias. | Use Scenario: Protecting -48 V telecom rectifier inputs against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Primary clamping device on DC input bus prior to upstream DC/DC converters. Use Value: 275 V clamping ensures converter primary-side FETs remain within safe SOA during 10/1000 µs surges up to 5.5 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 100 °C/W) | Not suitable for 1500 W automotive load-dump events; limited to low-energy ESD | Select only when space constraints prohibit SMC and surge energy is <400 W |
| SMCJ170A-M3/57T | Same electrical specs but commercial-grade (non-AEC-Q101), M3 suffix (halogen-free RoHS) | Lacks automotive qualification; not approved for safety-critical vehicle subsystems | Acceptable for industrial controls where AEC-Q101 is not mandated |
Compared with SMCJ170AHM3/I, SMAJ170AHE3/A trades surge capacity for size, while SMCJ170A-M3/57T removes automotive qualification but retains identical clamping and package - making HM3 the sole choice for AEC-Q101-compliant designs requiring full 1500 W immunity.
Availability
SMCJ170AHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, motor drive gate protection, and telecom DC input circuits requiring stable component supply across extended production lifecycles.
Supply support for SMCJ170AHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of SMCJ170AHM3/I and under what test condition?
The SMCJ170AHM3/I has a maximum clamping voltage (VC) of 275 V, measured at a peak pulse current (IPPM) of 5.5 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and reflects worst-case clamping performance during high-energy transients. The SMCJ170AHM3/I datasheet specifies this parameter under conditions defined in ANSI/IEEE C62.35.
Is SMCJ170AHM3/I qualified for automotive applications?
Yes, SMCJ170AHM3/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its part number - indicating halogen-free, RoHS-compliant construction and full automotive-grade reliability testing. It is approved for use in engine control units, body electronics, and ADAS power domains where sustained operation at 150 °C and resistance to mechanical shock/vibration are required. The SMCJ170AHM3/I meets all stress tests outlined in the AEC-Q101 standard.
What does the "HM3" suffix mean in SMCJ170AHM3/I?
The "HM3" suffix in SMCJ170AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" indicates automotive qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance. This distinguishes it from commercial variants like SMCJ170A-M3/57T (no "H") and ensures traceability to Vishay's automotive-grade manufacturing flow. The SMCJ170AHM3/I is fully documented in Vishay's AEC-Q101 certified product list.
What is the thermal resistance of SMCJ170AHM3/I and how does it affect layout design?
The SMCJ170AHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This means effective heat transfer relies on copper pad area and internal PCB copper layers - not just ambient convection. For continuous power dissipation, designers must allocate ≥64 mm² of 2-oz copper per terminal and avoid narrow traces. The SMCJ170AHM3/I thermal performance is optimized for SMC footprint adherence per Vishay's recommended pad layout.
How does SMCJ170AHM3/I differ from bidirectional versions like SMCJ170CA?
The SMCJ170AHM3/I is unidirectional, with polarity marked by a cathode band and intended for DC line-to-ground protection; SMCJ170CA is bidirectional, symmetric in both directions and used for AC or floating signal lines. Electrically, SMCJ170AHM3/I has forward voltage drop (~3.5 V at 100 A) and reverse blocking, while SMCJ170CA clamps equally in both polarities. The SMCJ170AHM3/I cannot substitute for SMCJ170CA in AC-coupled applications without circuit redesign.
SMCJ170AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ170AHM3/I FAQ
1.How can I place an order for SMCJ170AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170AHM3/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 SMCJ170AHM3/I reliable?
The price and inventory of SMCJ170AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ170AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170AHM3/I?
SMCJ170AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170AHM3/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 SMCJ170AHM3/I?
For technical support, including SMCJ170AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170AHM3/I requirements.
6.How does Aetrix verify that SMCJ170AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ170AHM3/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 SMCJ170AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ170AHM3/I?
All SMCJ170AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170AHM3/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 SMCJ170AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ170AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170AHM3/I Tags
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