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Vishay General Semiconductor - Diodes Division 1.5SMC170A-E3/9AT
- Part No.:
- 1.5SMC170A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170A-E3/9AT.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
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Product details
Overview
1.5SMC170A-E3/9AT from Vishay General Semiconductor is a unidirectional 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), 162–179 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 6.4 A maximum clamping current (IPPM), and clamps to 234 V at rated surge. It is used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC170A-E3/9AT datasheet, 1.5SMC170A-E3/9AT pinout, 1.5SMC170A-E3/9AT application, or 1.5SMC170A-E3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, 150 °C max junction temperature, RoHS-compliant matte tin plating, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 145 V), but triggers rapidly (<1 ns response) when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
The device is rated for 1500 W peak pulse power with 10/1000 µs waveform at 0.01% duty cycle, derated above 25 °C per thermal curve Fig. 2, and mounted on 8.0 mm × 8.0 mm copper pads. Thermal resistance is 75 °C/W junction-to-ambient and 15 °C/W junction-to-leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping. |
| VBR (Breakdown Voltage) | 162–179 V at 1 mA - Confirmed avalanche onset range; ensures predictable triggering during transients. |
| VC (Clamping Voltage) | 234 V at IPPM - Maximum voltage seen by protected circuit during 1500 W surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 µs) - Energy-handling capacity for lightning/inductive-spike suppression without failure. |
| ID (Reverse Leakage) | 1.0 µA at VWM - Ultra-low leakage preserves system efficiency and prevents false triggering in high-impedance nodes. |
| TJ max | 150 °C - Enables operation in under-hood automotive and industrial environments with minimal derating. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.2 mm min. cathode band width; compatible with automated pick-and-place. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side reference in unidirectional TVS configuration. |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 12 V rail, CAN_H); clamps to ground when overvoltage occurs. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) in properly laid-out PCBs. |
| Glass passivated chip junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure. |
| AEC-Q101 qualification option (HE3/HM3) | Validates reliability for automotive powertrain and body electronics applications requiring zero-defect robustness. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a). |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges within 1 ns. Use Value: Limits rail voltage to ≤234 V during 1500 W pulses, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Safeguarding analog front-ends of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Standoff-connected TVS on sensor supply and output lines to suppress ESD (IEC 61000-4-2) and inductive kickback. Use Value: 1.0 µA leakage at 145 V avoids loading high-impedance sensor bridges; 234 V clamping protects 16-bit ADC inputs. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
Use Scenario: Secondary-side surge protection on -48 V telecom rectifier outputs feeding base station radios. IC Role / Device Role / Timing Role: Unidirectional TVS installed between -48 V rail and return, referenced to system ground. Use Value: Withstands repetitive 10/1000 µs surges up to 1500 W while maintaining <1 µA leakage-critical for low-noise RF subsystems. |
Use Scenario: Clamping Miller-induced spikes on high-side gate drivers in 3-phase inverters driving PMSM motors. IC Role / Device Role / Timing Role: TVS placed between gate and source of SiC MOSFETs to suppress dv/dt-induced turn-on events. Use Value: 234 V clamping voltage ensures gate oxide remains below 20 V stress margin even during 100 V/ns transients. |
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-E3/52T | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 600 W PPPM rating. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump. | Select when board space is constrained and surge energy is ≤600 W. |
| 1.5KE170A | Through-hole DO-201 package; identical electrical specs but higher RθJA (100 °C/W) and no MSL-1 rating. | Not suitable for automated SMT production or high-reliability automotive reflow profiles. | Choose only for legacy through-hole designs or prototyping where hand-soldering is acceptable. |
Compared with SMBJ170A-E3/52T and 1.5KE170A, the 1.5SMC170A-E3/9AT delivers full 1500 W surge capability in an MSL-1-compliant SMT package-enabling automotive-grade production, higher power density, and compatibility with modern high-speed assembly lines.
Availability
1.5SMC170A-E3/9AT is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom DC feeds, and motor drive gate protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC170A-E3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding AEC-Q101 readiness and repeatable clamping behavior.
FAQ
What is the clamping voltage of the 1.5SMC170A-E3/9AT under full-rated surge current?
The 1.5SMC170A-E3/9AT clamps to a maximum of 234 V when subjected to its rated 1500 W peak pulse power with a 10/1000 µs waveform. This value is measured at the specified peak pulse current (IPPM = 6.4 A) and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The 1.5SMC170A-E3/9AT maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC170A-E3/9AT suitable for automotive applications?
The 1.5SMC170A-E3/9AT itself is RoHS-compliant and commercial-grade; however, the same die in HE3 or HM3 suffix variants (e.g., 1.5SMC170AHE3_A) is AEC-Q101 qualified for automotive use. For production automotive systems, specify the HE3/HM3 version-while the 1.5SMC170A-E3/9AT remains suitable for non-automotive industrial or telecom designs requiring identical electrical performance.
What does the "/9AT" suffix indicate in 1.5SMC170A-E3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-volume SMT placement and is distinct from "/57T" (7-inch reel, 850 units). The "E3" prefix confirms RoHS compliance and commercial-grade qualification; it does not imply AEC-Q101 status unless paired with HE3/HM3.
How does the 1.5SMC170A-E3/9AT compare to bidirectional TVS diodes like 1.5SMC170CA?
The 1.5SMC170A-E3/9AT is unidirectional and intended for DC line protection with defined polarity (cathode to protected line), whereas 1.5SMC170CA is bidirectional and suited for AC or differential signal lines (e.g., RS-485, CAN). Their VBR, VC, and PPPM values are identical, but the 1.5SMC170A-E3/9AT offers lower leakage in DC-biased applications and requires correct orientation during placement.
What is the thermal resistance of the 1.5SMC170A-E3/9AT, and how does it affect layout?
The 1.5SMC170A-E3/9AT 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. To maintain reliability under repeated surges, PCB layout must replicate this pad area-undersized traces or insufficient copper will increase junction temperature, accelerate parameter drift, and reduce surge endurance. The 1.5SMC170A-E3/9AT data sheet specifies this mounting condition for all ratings.
1.5SMC170A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC170A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170A-E3/9AT 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-E3/9AT reliable?
The price and inventory of 1.5SMC170A-E3/9AT 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-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC170A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170A-E3/9AT?
1.5SMC170A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170A-E3/9AT 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-E3/9AT?
For technical support, including 1.5SMC170A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC170A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC170A-E3/9AT?
All 1.5SMC170A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC170A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170A-E3/9AT Tags
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