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Vishay General Semiconductor - Diodes Division 1.5SMC170A-M3/57T
- Part No.:
- 1.5SMC170A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170A-M3/57T.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,880
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Product details
Overview
1.5SMC170A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 170 V standoff voltage (VWM), 194.5 V minimum breakdown voltage (VBR), 234 V maximum clamping voltage (VC) at 6.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC170A-M3/57T datasheet, 1.5SMC170A-M3/57T pinout, 1.5SMC170A-M3/57T application, or 1.5SMC170A-M3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, clamping performance under surge conditions, thermal resistance data, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (162–179 V), it avalanches to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 μA at 145 V) and fast response time (<1.0 ps), critical for protecting MOSFET gates and microcontroller I/O pins against ESD and lightning-induced surges.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The device is halogen-free and RoHS-compliant (M3 suffix), qualified to J-STD-020 MSL Level 1, and rated for 200 A non-repetitive forward surge current (IFSM) - supporting high-energy transient suppression without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC bias margin for protected line. |
| VBR (Breakdown Voltage) | 162–179 V at IT = 1.0 mA - Voltage at which avalanche conduction initiates; tight tolerance enables precise overvoltage threshold setting. |
| VC (Clamping Voltage) | 234 V at IPPM = 6.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Maximum transient energy absorption capability per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| ID (Reverse Leakage) | <1.0 μA at VWM = 145 V - Minimal standby current loss; preserves battery life and avoids false triggering in low-power systems. |
| TJ max. | 150 °C - Maximum junction temperature; allows operation in under-hood automotive or industrial ambient environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration; must be routed with low-inductance path. |
| Cathode | Current exit terminal during reverse avalanche | Connected to protected line (e.g., 12 V rail or CAN bus); band-marked end defines orientation for automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients per ISO 7637-2 Pulse 5a and IEC 61000-4-5 Combination Wave. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving clamping fidelity. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualified option available | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR drift (<0.108 %/°C) across temperature and lifetime. |
Applications
| Automotive Sensor Protection | Industrial DC Power Rail |
|---|---|
Use Scenario: Protecting 5 V or 12 V supply lines feeding ABS wheel speed sensors or HVAC actuators from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp transients above 145 V. Use Value: Prevents latch-up or gate oxide damage in connected MCU analog front-ends and driver ICs during ISO 7637-2 Pulse 5b events. |
Use Scenario: Safeguarding 24 V PLC I/O modules against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at module input connector to absorb repetitive 1500 W surges without degradation. Use Value: Maintains system uptime by eliminating field failures caused by cumulative surge stress on optocouplers and level translators. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each differential line (A/B) referenced to local ground plane. Use Value: Limits clamped voltage to ≤234 V, preserving transceiver common-mode range and preventing receiver saturation. |
Use Scenario: Secondary-side overvoltage protection on 19 V laptop adapter outputs exposed to hot-plug and cable fault conditions. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) TVS placed after DC-DC post-regulator to avoid quiescent current penalty. Use Value: Blocks >170 V faults while adding <0.5 mW standby loss - critical for Energy Star and EU CoC Tier 2 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-M3/57T | Same VWM/VBR/VC specs but SMB package (DO-214AA); lower PPPM = 600 W; RθJA = 85 °C/W. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for load dump or high-duty-cycle industrial use. | Select only when board space constraints prohibit SMC footprint and surge energy is confirmed ≤600 W. |
| 1.5SMC170AHE3_A/57T | Identical electrical specs and SMC package; RoHS-compliant (E3) but not halogen-free; AEC-Q101 qualified (HE3 suffix). | Approved for automotive production (e.g., infotainment head units); lacks halogen-free certification required for some OEMs. | Choose for AEC-Q101 compliance where halogen-free is not mandated; verify qualification revision (A) matches program requirements. |
Compared with 1.5SMC170A-M3/57T, SMBJ170A-M3/57T trades surge capacity for smaller size, while 1.5SMC170AHE3_A/57T provides automotive qualification at the cost of halogen-free status - making the original part optimal for industrial and halogen-sensitive automotive programs requiring full 1500 W clamping headroom.
Availability
1.5SMC170A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, halogen-free compliance, and repeatable 1500 W transient handling.
Supply support for 1.5SMC170A-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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC170A-M3/57T under a 10/1000 μs surge?
The 1.5SMC170A-M3/57T has a maximum clamping voltage (VC) of 234 V at a peak pulse current (IPPM) of 6.4 A with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC170A-M3/57T halogen-free and RoHS-compliant?
Yes, the 1.5SMC170A-M3/57T carries the M3 suffix, indicating it is both halogen-free and RoHS-compliant per Vishay's material categorization standard (document 99912). This meets stringent environmental requirements for consumer, industrial, and automotive electronics where brominated flame retardants and chlorine content are restricted.
Does the 1.5SMC170A-M3/57T have AEC-Q101 qualification?
No - the 1.5SMC170A-M3/57T is commercial-grade and not AEC-Q101 qualified. For automotive applications requiring qualification, the functionally identical 1.5SMC170AHE3_A/57T (E3 + HE3 suffix) or 1.5SMC170AHM3_A/57T (M3 + HM3 suffix) should be selected, both explicitly listed as AEC-Q101 qualified in the Vishay ordering table.
What is the thermal resistance junction-to-ambient (RθJA) for the 1.5SMC170A-M3/57T?
The 1.5SMC170A-M3/57T has a typical RθJA of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Thermal Characteristics section of datasheet 88303. This value assumes standard PCB layout and natural convection cooling - derating is required above TA = 25 °C per Figure 2.
How does the 1.5SMC170A-M3/57T differ from bidirectional variants like 1.5SMC170CA-M3/57T?
The 1.5SMC170A-M3/57T is unidirectional with cathode marking and conducts only in reverse avalanche; the 1.5SMC170CA-M3/57T is bidirectional, symmetrical, and lacks polarity marking. Their VWM (145 V vs. 128 V), VBR (162–179 V vs. 145–160 V), and VC (234 V vs. 210 V) differ significantly - selecting the wrong type risks failure to clamp AC transients or unintended forward conduction.
1.5SMC170A-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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC170A-M3/57T FAQ
1.How can I place an order for 1.5SMC170A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170A-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 1.5SMC170A-M3/57T reliable?
The price and inventory of 1.5SMC170A-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 1.5SMC170A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC170A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170A-M3/57T?
1.5SMC170A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170A-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 1.5SMC170A-M3/57T?
For technical support, including 1.5SMC170A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC170A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170A-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 1.5SMC170A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC170A-M3/57T?
All 1.5SMC170A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170A-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 1.5SMC170A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC170A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170A-M3/57T Tags
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