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Vishay General Semiconductor - Diodes Division 1.5SMC350AHM3_A/H
- Part No.:
- 1.5SMC350AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC350AHM3_A/H.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,617
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Product details
Overview
1.5SMC350AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 350 V standoff voltage (VWM), 482 V clamping voltage at 3.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform. It is halogen-free, RoHS-compliant, AEC-Q101 qualified, and housed in an SMC (DO-214AB) package - suitable for automotive power rail and industrial sensor interface protection.
For engineers reviewing the 1.5SMC350AHM3_A/H datasheet, 1.5SMC350AHM3_A/H pinout, 1.5SMC350AHM3_A/H application, or 1.5SMC350AHM3_A/H equivalent, key selection considerations include its 350 V stand-off rating, 482 V clamping performance under 3.1 A surge, AEC-Q101 qualification status, SMC package thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping overvoltage protector, leveraging an avalanche breakdown mechanism to shunt transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the SMC package supports 6.5 W steady-state power dissipation at 50 °C ambient with RθJA = 75 °C/W.
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle and withstands 200 A non-repetitive forward surge (8.3 ms half-sine). It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and is qualified per AEC-Q101 for automotive underhood applications requiring robustness across –65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Measured voltage at which device enters avalanche; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 482 V at IPPM = 3.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity for standardized 10/1000 μs waveform; enables protection against lightning-induced surges. |
| IFSM (Surge Current) | 200 A - Single 8.3 ms half-sine surge rating; validates robustness against inductive switching events. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal pad layout. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Polarity indicated by cathode band; unidirectional configuration only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Protected line connection / Surge input | Connected to line being protected (e.g., 12 V battery rail); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use per stress test requirements including temperature cycling, HTRB, and ESD; supports PPAP documentation. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and automotive OEMs without compromising surge robustness or thermal performance. |
| 1500 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV) surge events on 12 V/24 V systems when properly laid out with 8.0 mm × 8.0 mm copper pads. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 μA), and long-term reliability under repeated surge stress. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly at peak temperatures up to 260 °C. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and ground, responding within <1 ps to limit voltage excursion. Use Value: Clamps to 482 V at 3.1 A, preventing damage to MCU power supplies and CAN transceivers during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Line-side transient suppressor on 4–20 mA or 0–10 V output paths, absorbing ESD and inductive kickback. Use Value: Limits induced surges to ≤482 V with <1.0 μA leakage at 300 V, preserving signal integrity and ADC accuracy in 24 V systems. |
| Telecom DC Power Input | Renewable Energy Charge Controller |
Use Scenario: Front-end protection of PoE-powered equipment or base station DC inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on –48 V or +54 V telecom supply rails, coordinated with upstream fusing. Use Value: Withstands 1500 W peak pulses and maintains VWM = 300 V, enabling robust protection without false triggering during normal operation. |
Use Scenario: Surge suppression on PV array input terminals of solar charge controllers subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional TVS on positive input rail referenced to system ground, diverting surge current to chassis. Use Value: Rated for TJ = 150 °C and validated for outdoor mounting; clamps 10/1000 μs surges to 482 V while surviving repeated 200 A 8.3 ms surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A-E3/52 | Lower peak pulse power (600 W), SMB package (smaller footprint, higher RθJA = 90 °C/W), same VWM/VC ratings. | Not AEC-Q101 qualified; limited to commercial-grade industrial or consumer applications. | Select when board space is constrained and surge energy is ≤600 W; verify thermal derating for sustained ambient >70 °C. |
| 1.5KE350A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or halogen-free option. | Requires wave soldering; unsuitable for fully SMT automotive designs or RoHS/halogen-free compliance programs. | Choose only for legacy through-hole designs where rework to SMT is not feasible and automotive qualification is unnecessary. |
Compared with SMBJ350A-E3/52 and 1.5KE350A, the 1.5SMC350AHM3_A/H delivers higher surge robustness (1500 W vs. 600 W or 1500 W with inferior packaging), AEC-Q101 validation, halogen-free construction, and superior thermal performance in SMT layouts - making it the preferred choice for new automotive and industrial designs demanding reliability and compliance.
Availability
1.5SMC350AHM3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC input safeguarding, and renewable energy charge controller surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC350AHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and repeatable clamping performance are critical design requirements.
FAQ
What is the clamping voltage of the 1.5SMC350AHM3_A/H under maximum rated surge current?
The 1.5SMC350AHM3_A/H has a maximum clamping voltage (VC) of 482 V when subjected to its rated peak pulse current (IPPM) of 3.1 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on specified 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC350AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC350AHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its operating junction temperature range of –65 °C to +150 °C, MSL Level 1 reflow rating, and validation for repetitive surge stress make it appropriate for under-hood automotive power rail and sensor protection applications.
What does the "HM3" suffix indicate in 1.5SMC350AHM3_A/H?
The "HM3" suffix denotes that the 1.5SMC350AHM3_A/H is halogen-free, RoHS-compliant, and AEC-Q101 qualified. The "H" indicates 7″ tape-and-reel packaging (850 units per reel), and "A/H" specifies revision code "A" and packaging variant "H", consistent with Vishay's ordering nomenclature for automotive-grade SMC TVS diodes.
How does the 1.5SMC350AHM3_A/H compare to bidirectional TVS diodes?
The 1.5SMC350AHM3_A/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground). Unlike bidirectional variants (e.g., 1.5SMC350CA), it conducts only in reverse bias and offers lower leakage (<1.0 μA at 300 V) and tighter VBR tolerance - advantageous for precision power rail monitoring and low-quiescent-current systems.
What PCB layout guidance applies to the 1.5SMC350AHM3_A/H for optimal thermal and surge performance?
For optimal performance, mount the 1.5SMC350AHM3_A/H on minimum 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet. Use short, low-inductance traces to ground, avoid thermal relief on pads, and ensure adequate spacing from adjacent components to maintain VWM margin and prevent arcing during 1500 W surges.
1.5SMC350AHM3_A/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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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)
1.5SMC350AHM3_A/H FAQ
1.How can I place an order for 1.5SMC350AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC350AHM3_A/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 1.5SMC350AHM3_A/H reliable?
The price and inventory of 1.5SMC350AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC350AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC350AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC350AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC350AHM3_A/H?
1.5SMC350AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC350AHM3_A/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 1.5SMC350AHM3_A/H?
For technical support, including 1.5SMC350AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC350AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC350AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC350AHM3_A/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 1.5SMC350AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC350AHM3_A/H?
All 1.5SMC350AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC350AHM3_A/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 1.5SMC350AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC350AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC350AHM3_A/H Tags
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