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Vishay General Semiconductor - Diodes Division 1.5SMC170AHM3/H
- Part No.:
- 1.5SMC170AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170AHM3/H.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,130
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Product details
Overview
1.5SMC170AHM3/H 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), 190 V minimum breakdown voltage (VBR), 234 V maximum clamping voltage (VC) at 6.4 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive power supply rails, industrial motor drive I/O interfaces, and telecom DC feed protection.
For engineers reviewing the 1.5SMC170AHM3/H datasheet, 1.5SMC170AHM3/H pinout, 1.5SMC170AHM3/H application, or 1.5SMC170AHM3/H equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for robust transient suppression where low incremental surge resistance, fast response time (<1 ns), and MSL Level 1 moisture sensitivity are required.
Technical Context
The 1.5SMC170AHM3/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver precise voltage clamping during ESD and lightning-induced transients. Its thermal resistance (RθJL = 15 °C/W) supports reliable energy dissipation when mounted on 8.0 mm × 8.0 mm copper pads, and its -65 °C to +150 °C operating junction temperature range enables deployment in under-hood automotive environments.
It complies with UL 497B recognition (QVGQ2) and meets JESD201 Class 2 whisker resistance requirements. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade M3 or E3 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 145 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 162–179 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 234 V at IPPM = 6.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for downstream IC survival. |
| PPPM | 1500 W - Sustains single 10/1000 μs surges up to this power level without failure; validated per Fig. 1 derating curves. |
| ID (Leakage) | 1.0 μA max at VWM - Ultra-low reverse leakage preserves efficiency in high-impedance bias networks. |
| TJ max | +150 °C - Enables use in engine control units and industrial inverters without thermal derating penalties. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased operation) | Connected to protected line side; carries surge current into the device during clamping. |
| Cathode | Current exit terminal (reverse-biased operation) | Connected to ground or low-impedance return path; establishes reference for clamping voltage VC. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TCT, and H3TRB. |
| Halogen-free & RoHS-compliant | HM3 suffix guarantees compliance with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU, eliminating brominated flame retardants. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω/12 Ω coupling networks without degradation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system-level immunity. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling prior to assembly. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 145 V. Use Value: Limits peak voltage to ≤234 V during 100 ms load dump events, preventing damage to MCU power regulators and CAN transceivers. |
Use Scenario: Shielding PLC analog input modules from inductive kickback when controlling solenoids or contactors. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal conditioning front-end to absorb 1.5 kV/μs fast transients. Use Value: Clamps induced spikes within <1 ns, preserving ADC accuracy and avoiding false triggering of overvoltage alarms. |
| Telecom DC Feed Protection | Renewable Energy Inverter DC Link |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) connected to central office DC feeds. IC Role / Device Role / Timing Role: Primary surge suppressor on 48 V DC input, upstream of DC/DC converter. Use Value: Absorbs lightning-induced surges per ITU-T K.20/21 while maintaining <1 μA leakage to avoid standby power loss. |
Use Scenario: Protecting IGBT gate drivers and bus voltage sensors in solar string inverters exposed to grid switching transients. IC Role / Device Role / Timing Role: Clamp device across DC link capacitor to limit overvoltage during rapid IGBT turn-off. Use Value: Withstands repetitive 1500 W pulses at 0.01 % duty cycle, enabling long-term reliability in outdoor 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 |
|---|---|---|---|
| SMBJ170AHE3/A | Same VWM (145 V) and VC (234 V), but SMB package (smaller footprint, lower PPPM = 600 W). | Limited to lower-energy transients; unsuitable for ISO 16750-2 load dump or IEC 61000-4-5 Level 4. | Select only when board space is constrained and surge energy does not exceed 600 W. |
| 1.5KE170A | Through-hole DO-201 package; identical electrical specs but higher RθJA (100 °C/W vs. 75 °C/W) and no AEC-Q101 qualification. | Not suitable for automated SMT production or automotive under-hood use due to packaging and qualification gaps. | Use only in legacy through-hole designs where rework tolerance and manual assembly are acceptable. |
Compared with SMBJ170AHE3/A and 1.5KE170A, the 1.5SMC170AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, 1500 W surge rating, and SMC package thermal performance - making it the only choice for new automotive and industrial SMT designs requiring full compliance and high-energy resilience.
Availability
1.5SMC170AHM3/H is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial PLC I/O modules, and telecom DC feed circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC170AHM3/H 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - balancing high peak power, tight voltage tolerances, and AEC-Q101 compliance for automotive and industrial power systems.
FAQ
What is the clamping voltage of the 1.5SMC170AHM3/H under a 10/1000 μs surge?
The 1.5SMC170AHM3/H exhibits a maximum clamping voltage (VC) of 234 V when subjected to its rated peak pulse current of 6.4 A using the standardized 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 surge events - critical for ensuring downstream components like microcontrollers or gate drivers remain within absolute maximum ratings.
Is the 1.5SMC170AHM3/H qualified for automotive applications?
Yes, the 1.5SMC170AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
What does the "HM3" suffix mean in 1.5SMC170AHM3/H?
The "HM3" suffix in 1.5SMC170AHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" denotes the tape-and-reel packaging variant (850 pcs per 7″ reel), "M3" specifies halogen-free molding compound and plating, and the trailing "/H" confirms the packaging code. This distinguishes it from commercial-grade M3 or E3 variants and ensures compliance with automotive material restrictions and environmental directives.
How does the 1.5SMC170AHM3/H compare to bidirectional TVS diodes?
The 1.5SMC170AHM3/H is unidirectional, meaning it conducts only during reverse-bias overvoltage events and blocks forward current - ideal for DC power line protection where polarity is fixed. Bidirectional variants (e.g., 1.5SMC170CA) conduct in both directions and are used for AC lines or data buses with undefined polarity. Using the 1.5SMC170AHM3/H in AC applications would result in forward conduction and potential failure; correct selection depends strictly on circuit polarity and signal type.
What is the thermal resistance of the 1.5SMC170AHM3/H, and why does it matter?
The 1.5SMC170AHM3/H has a typical junction-to-leads thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. These values directly impact sustained surge handling: lower RθJL enables faster heat transfer to PCB copper, allowing the device to absorb repetitive 1500 W pulses at 0.01 % duty cycle without exceeding its 150 °C maximum junction temperature - essential for industrial motor drives and telecom base stations.
1.5SMC170AHM3/H 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/H FAQ
1.How can I place an order for 1.5SMC170AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170AHM3/H 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/H reliable?
The price and inventory of 1.5SMC170AHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC170AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170AHM3/H?
1.5SMC170AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170AHM3/H 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/H?
For technical support, including 1.5SMC170AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC170AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170AHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC170AHM3/H?
All 1.5SMC170AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170AHM3/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC170AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170AHM3/H Tags
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