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Vishay General Semiconductor - Diodes Division 1.5SMC170AHM3/I
- Part No.:
- 1.5SMC170AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170AHM3/I.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,168
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Product details
Overview
1.5SMC170AHM3/I 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 min/max = 162–179 V at 1 mA), 145 V standoff voltage (VWM), and 234 V clamping voltage (VC) at 6.4 A peak pulse current (IPPM). It delivers 1500 W peak pulse power (10/1000 µs), supports automotive-grade reliability (AEC-Q101 qualified), and protects MOSFETs and sensor signal lines against lightning-induced transients in industrial and automotive systems.
For engineers reviewing the 1.5SMC170AHM3/I datasheet, 1.5SMC170AHM3/I pinout, 1.5SMC170AHM3/I application, or 1.5SMC170AHM3/I equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, AEC-Q101 qualification status, and direct alternatives with documented VBR, VC, and IPPM alignment.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its standoff voltage (145 V), limiting downstream voltage to ≤234 V during 10/1000 µs surges up to 6.4 A. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1 ns), critical for protecting high-speed sensor interfaces and power MOSFET gates.
Thermal design relies on low junction-to-lead resistance (RθJL = 15 °C/W) and derated pulse power above 25 °C ambient - e.g., 75% of 1500 W at TJ = 100 °C per Fig. 2. The SMC package meets UL 94 V-0 and JESD201 Class 2 whisker resistance, supporting automated placement in automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at 1 mA test current - defines precise avalanche onset range for predictable clamping threshold |
| VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets system DC rail margin |
| VC @ IPPM | 234 V at 6.4 A - peak clamped voltage during 10/1000 µs surge; determines protected circuit's voltage stress limit |
| PPPM | 1500 W - peak transient power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad footprint for thermal management |
Pinout & Package
SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band on unidirectional devices. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per datasheet Fig. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe lightning-induced transients per IEC 61000-4-5 |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive powertrain and body electronics with extended temperature and reliability testing |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability across 150 °C operation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping spikes >145 V to ≤234 V within nanoseconds. Use Value: Prevents damage to LDO regulators and microcontrollers by limiting transient energy dissipation to 1500 W peak without latch-up. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to suppress ESD (IEC 61000-4-2 ±8 kV) and inductive switching noise. Use Value: Maintains signal integrity below 234 V clamping level while adding <1 pF capacitance - no bandwidth degradation in 0–10 kHz sensor bandwidth. |
| Telecom Interface Protection | Motor Drive Gate Driver Protection |
Use Scenario: Shielding RS-485 transceivers in outdoor base stations from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (e.g., 1.5SMC170AHM3/I + 1.5SMC170AHM3/I) on A/B lines referenced to common-mode ground. Use Value: Clamps differential and common-mode transients simultaneously while preserving data rate integrity up to 10 Mbps. |
Use Scenario: Protecting high-side gate drivers in 48 V BLDC motor inverters from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: TVS placed between gate and source of SiC MOSFETs to clamp dv/dt-induced overshoot exceeding 145 V. Use Value: Limits gate-source voltage to ≤234 V, preventing dielectric breakdown of gate oxide and ensuring reliable 100 kHz PWM operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ170A | VBR = 162–179 V, VC = 234 V at 6.4 A, same SMC package, but not AEC-Q101 qualified | Suitable for commercial/industrial use only; lacks automotive stress-test validation | Select when AEC-Q101 is not required and cost optimization is prioritized |
| ON Semiconductor 1.5SMC170A-M3/57T | Identical VBR/VC/IPPM, same SMC package, RoHS-compliant M3 suffix, but no AEC-Q101 qualification | Compatible for non-automotive designs; differs in halogen-free compliance vs. HM3's dual RoHS/halogen-free status | Choose for legacy BOM continuity where M3 suffix is already approved and automotive qualification is unnecessary |
Compared with 1.5SMC170AHM3/I, SMAJ170A offers identical clamping performance but omits AEC-Q101 validation, while 1.5SMC170A-M3/57T matches electrical specs and RoHS compliance but lacks both halogen-free certification and automotive qualification - making 1.5SMC170AHM3/I the sole option meeting full automotive production requirements.
Availability
1.5SMC170AHM3/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom surge suppression requiring stable component supply, AEC-Q101 traceability, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC170AHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series targets robust transient suppression in harsh environments - engineered specifically for automotive, industrial, and telecom applications demanding AEC-Q101 validation, 1500 W surge capability, and stable parametric performance across -65 °C to +150 °C.
FAQ
What is the clamping voltage of the 1.5SMC170AHM3/I under a 10/1000 µs surge?
The 1.5SMC170AHM3/I clamps to a maximum of 234 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 6.4 A. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The 1.5SMC170AHM3/I maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is the 1.5SMC170AHM3/I qualified for automotive applications?
Yes, the 1.5SMC170AHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Doc. #88303). This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), validating its suitability for under-hood and chassis-mounted automotive electronics. The 1.5SMC170AHM3/I is explicitly designated for automotive use in the ordering information table.
What is the standoff voltage rating of the 1.5SMC170AHM3/I?
The standoff voltage (VWM) of the 1.5SMC170AHM3/I is 145 V - the maximum DC or continuous reverse operating voltage that can be applied without exceeding 1 µA leakage current. This parameter ensures the 1.5SMC170AHM3/I remains non-conductive during normal operation while providing sufficient margin below its 162 V minimum breakdown voltage, making it appropriate for 12 V and 24 V automotive systems with transient headroom.
Does the 1.5SMC170AHM3/I have a bidirectional variant?
No, the 1.5SMC170AHM3/I is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. Bidirectional variants in the same voltage grade use the "CA" suffix (e.g., 1.5SMC170CA), which exhibit symmetrical clamping in both directions. The 1.5SMC170AHM3/I must be oriented with its cathode toward the protected line and anode to ground; incorrect polarity will prevent proper transient suppression.
What package type does the 1.5SMC170AHM3/I use?
The 1.5SMC170AHM3/I uses the SMC (DO-214AB) surface-mount package, measuring 7.75 mm × 6.22 mm × 2.62 mm with matte tin-plated leads. This package meets UL 94 V-0 flammability rating, supports J-STD-002 solderability, and is rated MSL Level 1 for lead-free reflow up to 260 °C. Thermal performance relies on recommended 8.0 mm × 8.0 mm copper pads per terminal, as specified in the 1.5SMC170AHM3/I datasheet.
1.5SMC170AHM3/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC170AHM3/I FAQ
1.How can I place an order for 1.5SMC170AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170AHM3/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 1.5SMC170AHM3/I reliable?
The price and inventory of 1.5SMC170AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC170AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170AHM3/I?
1.5SMC170AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170AHM3/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 1.5SMC170AHM3/I?
For technical support, including 1.5SMC170AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC170AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170AHM3/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 1.5SMC170AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC170AHM3/I?
All 1.5SMC170AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170AHM3/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 1.5SMC170AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC170AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170AHM3/I Tags
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