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Vishay General Semiconductor - Diodes Division 1.5SMC170CA-M3/57T
- Part No.:
- 1.5SMC170CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CA-M3/57T.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,838
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Product details
Overview
1.5SMC170CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 170 V standoff voltage (VWM), 190 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), clamps to ≤234 V at 6.4 A, and operates from –65 °C to +150 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC170CA-M3/57T datasheet, 1.5SMC170CA-M3/57T pinout, 1.5SMC170CA-M3/57T application, or 1.5SMC170CA-M3/57T equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under transient stress, thermal derating curves, and AEC-Q101-qualified alternatives for robust ESD and lightning surge design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR (162–179 V), VWM (145 V), and VC (≤234 V) in either direction. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response (<1 ns), enabling protection of sensitive analog front-ends and CAN/LIN bus nodes against ISO 7637-2 pulses and IEC 61000-4-5 surges.
Mounted on 8.0 mm × 8.0 mm copper pads, it delivers 1500 W peak pulse power per JEDEC JESD22-A114E (10/1000 µs waveform) with 0.01% duty cycle. Thermal resistance is RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C without forced cooling in standard SMC footprint layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 145 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 162–179 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients above system rail. |
| VC (Clamping) | ≤234 V at IPPM = 6.4 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM | 1500 W - Surge energy handling capacity per single 10/1000 µs pulse; enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-ground). |
| ID (Leakage) | <1 µA at VWM - Negligible standby current; avoids loading of high-impedance sensor bias networks or reference rails. |
| TJ max. | +150 °C - Junction temperature limit; supports under-hood automotive use and industrial environments with minimal heatsinking. |
| Package | SMC (DO-214AB) - Standardized 7.11 mm × 6.22 mm surface-mount outline; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
SMC (DO-214AB) package: symmetrical dual-terminal construction with no polarity marking for bidirectional operation. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche behavior - either terminal serves as anode or cathode depending on instantaneous polarity of surge event. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns. |
| 1500 W peak pulse rating | Withstands repetitive 10/1000 µs surges up to 6.4 A - sufficient for ISO 7637-2 Pulse 5a (50 V, 12 Ω source) in 12 V automotive systems. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge performance. |
| AEC-Q101 qualified option | HM3 suffix variants available - validated for automotive-grade reliability including HTOL, temperature cycling, and HAST testing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD contact discharge), improving protection margin for sub-20 V logic ICs. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting 5 V or 12 V sensor supply lines and signal outputs (e.g., pressure, temperature, position sensors) from load dump and inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±200 V surges before reaching LDO regulators and ADC front-ends. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs and precision op-amps by limiting transient voltage to ≤234 V at 6.4 A. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal integrity during IEC 61000-4-5 4 kV surge tests while adding <1 pF parasitic capacitance - no bandwidth degradation in DC–10 kHz signals. |
| Telecom Line Card Protection | Consumer Power Adapter Output |
Use Scenario: Secondary-level surge suppression on low-voltage DC distribution rails (e.g., +3.3 V, +5 V) feeding Ethernet PHYs, PoE controllers, and management microcontrollers in access switches. IC Role / Device Role / Timing Role: Fast-acting shunt device triggered within nanoseconds to divert surge energy away from powered silicon. Use Value: Achieves <10 ns response time and <1 µA leakage - preserves quiescent current budget and prevents false resets during brown-out conditions. |
Use Scenario: Output-side transient suppression on wall adapters supplying USB-C PD, smart home hubs, or IoT gateways subject to mains-borne noise and capacitor discharge events. IC Role / Device Role / Timing Role: Final-stage protector between secondary-side rectifier and downstream DC-DC converter input. Use Value: Withstands 1500 W surges without degradation over >100,000 cycles - extends adapter lifetime in ungrounded consumer installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA | Same VWM (145 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or industrial 4 kV tests. | Select when board space is constrained and surge threat level is ≤1 kV; verify thermal margin at full rated power. |
| 1.5KE170CA | Same VWM/VBR/VC specs, but axial-leaded DO-15 package - not surface-mountable; higher mounting inductance. | Requires through-hole assembly; incompatible with automated SMT lines and high-frequency PCB layouts. | Choose only for prototyping, legacy repair, or non-automated production where SMT is unavailable. |
Compared with 1.5SMC170CA-M3/57T, SMAJ170CA trades surge robustness for compactness, while 1.5KE170CA sacrifices manufacturability and high-frequency performance for identical electrical specs in through-hole form - making the 1.5SMC170CA-M3/57T optimal for volume SMT production requiring AEC-Q101 readiness and 1500 W capability.
Availability
1.5SMC170CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input conditioning, telecom line card DC rails, and consumer power adapter output stages requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC170CA-M3/57T 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 and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series targets robust transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC170CA-M3/57T during a 10/1000 µs surge?
The 1.5SMC170CA-M3/57T clamps to a maximum of 234 V when subjected to its rated peak pulse current of 6.4 A under the standard 10/1000 µs waveform. This value is measured per JEDEC JESD22-A114E and confirmed in Vishay's datasheet revision 09-Mar-2026, page 2. The clamping voltage directly determines the peak stress imposed on downstream circuitry, making it critical for selecting compatible ICs and passive components.
Is the 1.5SMC170CA-M3/57T suitable for automotive applications?
Yes - the 1.5SMC170CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and an AEC-Q101-qualified version (HM3 suffix) is available. While the M3 variant itself is commercial-grade, its electrical specs - including 1500 W surge rating, –65 °C to +150 °C operating range, and compatibility with automotive surge standards like ISO 7637-2 - make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
How does the bidirectional nature of the 1.5SMC170CA-M3/57T affect its placement in a circuit?
The 1.5SMC170CA-M3/57T has no polarity marking and conducts identically in both directions, allowing placement across any two points requiring symmetrical overvoltage protection - such as differential signal pairs (RS-485, CAN-H/CAN-L), AC-coupled lines, or ungrounded DC rails. Unlike unidirectional TVS diodes, it eliminates orientation errors during assembly and simplifies layout for balanced protection schemes without additional series components.
What is the thermal resistance and how does it impact PCB layout for the 1.5SMC170CA-M3/57T?
The 1.5SMC170CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet. To maintain safe junction temperatures under repeated surges, PCB layout must replicate this pad area - undersized pads increase thermal impedance and risk exceeding the +150 °C TJ limit, especially in enclosed enclosures or high ambient temperatures.
Does the 1.5SMC170CA-M3/57T have a defined junction capacitance value?
No junction capacitance (CJ) is specified for the 1.5SMC170CA-M3/57T in the official Vishay datasheet (document 88303, revision 09-Mar-2026). While typical SMC-packaged TVS diodes in this voltage range exhibit CJ values between 50–150 pF at zero bias, designers requiring precise high-frequency modeling should consult Vishay's application notes or measure CJ empirically - the absence of a published value indicates it is not characterized or guaranteed for RF-sensitive applications.
1.5SMC170CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC170CA-M3/57T FAQ
1.How can I place an order for 1.5SMC170CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CA-M3/57T 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 1.5SMC170CA-M3/57T reliable?
The price and inventory of 1.5SMC170CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CA-M3/57T?
1.5SMC170CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CA-M3/57T 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 1.5SMC170CA-M3/57T?
For technical support, including 1.5SMC170CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC170CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CA-M3/57T 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 1.5SMC170CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CA-M3/57T?
All 1.5SMC170CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CA-M3/57T, 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 1.5SMC170CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC170CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170CA-M3/57T Tags
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