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Vishay General Semiconductor - Diodes Division 1.5SMC170AHE3/9AT
- Part No.:
- 1.5SMC170AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170AHE3/9AT.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,857
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Product details
Overview
1.5SMC170AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 170 V breakdown voltage (VBR = 162–179 V at IT = 1 mA), 234 V maximum clamping voltage (VC) at 6.4 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against lightning surges and inductive switching transients.
For engineers reviewing the 1.5SMC170AHE3/9AT datasheet, 1.5SMC170AHE3/9AT pinout, 1.5SMC170AHE3/9AT application, or 1.5SMC170AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability standards.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device with avalanche breakdown behavior. Its glass-passivated junction ensures stable VBR tolerance (±5 %), fast response time (<1 ns), and low dynamic impedance under transient stress. The device is designed for placement on PCB copper pads (8.0 mm × 8.0 mm per terminal) to meet thermal derating requirements up to 150 °C junction temperature.
It complies with UL 497B recognition (QVGQ2) and meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C). The HE3 suffix confirms AEC-Q101 qualification, RoHS compliance, and suitability for automotive-grade applications where reliability under repetitive surge conditions is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at IT = 1 mA - defines precise avalanche onset range for predictable clamping threshold |
| VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 234 V at 6.4 A (10/1000 µs) - peak clamped voltage limiting stress on downstream circuitry |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault events |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking and layout design |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without moisture sensitivity concerns |
| Matte tin-plated leads | Guarantees solder joint reliability and compatibility with J-STD-002 and JESD 22-B102 standards |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 145 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤234 V, preventing latch-up or gate oxide damage. |
Use Scenario: Input stage safeguarding for 3-phase inverter drives exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC bus input to absorb energy from L·di/dt spikes. Use Value: Withstands 1500 W pulses without degradation, maintaining clamping performance over >100,000 surge cycles. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: CAN/LIN bus line protection in vehicle body control modules subject to ESD and coupled transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on signal-to-ground path, preserving signal integrity. Use Value: Clamps fast transients within <1 ns while adding minimal parasitic capacitance to high-speed data lines. |
Use Scenario: Primary-side surge suppression on AC/DC adapter inputs in telecom base station power supplies. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via mains input. Use Value: Meets UL 497B recognition and delivers repeatable 234 V clamping at 6.4 A, ensuring downstream MOV and fuse coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3/57T | Same VBR range (162–179 V), but SMB package (DO-214AA); lower PPPM = 600 W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select when board space is constrained and surge energy is ≤600 W |
| 1.5KE170A-E3/54 | Through-hole DO-201 package; identical VBR/VC specs but higher RθJA (100 °C/W) | Requires larger PCB footprint and manual or wave soldering; not AEC-Q101 qualified | Choose only for legacy through-hole designs or non-automotive cost-sensitive applications |
Compared with SMBJ170AHE3/57T and 1.5KE170A-E3/54, the 1.5SMC170AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC's optimized thermal pad layout-making it the only option qualified for under-hood automotive power rail protection requiring both high energy absorption and reflow compatibility.
Availability
1.5SMC170AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, automotive sensor signal lines, and telecom power interface applications requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for 1.5SMC170AHE3/9AT 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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The 1.5SMC Series was developed specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, 1500 W pulse handling, and stable clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC170AHE3/9AT under a 10/1000 µs surge?
The 1.5SMC170AHE3/9AT has a maximum clamping voltage (VC) of 234 V at 6.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88303 and reflects the actual voltage imposed on protected circuitry during worst-case transient events. The 1.5SMC170AHE3/9AT maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).
Is the 1.5SMC170AHE3/9AT AEC-Q101 qualified?
Yes, the 1.5SMC170AHE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and documented in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026, Doc. #88303). This qualification covers stress tests including high-temperature operating life, temperature cycling, and surge robustness-making the 1.5SMC170AHE3/9AT suitable for automotive powertrain and body electronics applications.
What does the "9AT" suffix indicate in 1.5SMC170AHE3/9AT?
The "9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with a standard quantity of 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "170A" specifies the 170 V nominal breakdown voltage grade of the 1.5SMC170AHE3/9AT.
How does the 1.5SMC170AHE3/9AT differ from bidirectional variants like 1.5SMC170CA?
The 1.5SMC170AHE3/9AT is unidirectional, meaning it conducts only in reverse bias (cathode to anode) during overvoltage events and blocks forward current. In contrast, 1.5SMC170CA is bidirectional and symmetrical-clamping in both polarities. The 1.5SMC170AHE3/9AT is used where polarity is known (e.g., power rail to ground), offering tighter VBR tolerance and slightly lower VC than its bidirectional counterpart at equivalent ratings.
What is the maximum operating temperature for the 1.5SMC170AHE3/9AT?
The 1.5SMC170AHE3/9AT has a maximum junction temperature (TJ) of +150 °C and an operating/storage temperature range of −65 °C to +150 °C. Its thermal resistance junction-to-ambient (RθJA) is 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Derating curves in Fig. 2 of the datasheet must be applied above 25 °C ambient to ensure the 1.5SMC170AHE3/9AT remains within safe thermal limits.
1.5SMC170AHE3/9AT 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC170AHE3/9AT FAQ
1.How can I place an order for 1.5SMC170AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170AHE3/9AT 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 1.5SMC170AHE3/9AT reliable?
The price and inventory of 1.5SMC170AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC170AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170AHE3/9AT?
1.5SMC170AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170AHE3/9AT 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 1.5SMC170AHE3/9AT?
For technical support, including 1.5SMC170AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC170AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170AHE3/9AT 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 1.5SMC170AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC170AHE3/9AT?
All 1.5SMC170AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170AHE3/9AT, 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 1.5SMC170AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC170AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170AHE3/9AT Tags
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