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Vishay General Semiconductor - Diodes Division 1.5SMC350AHE3_A/H
- Part No.:
- 1.5SMC350AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC350AHE3_A/H.pdf
- Description:
- TVS DIODE 300VWM 482VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,907
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Product details
Overview
1.5SMC350AHE3_A/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 350 V standoff voltage (VWM), 482 V clamping voltage (VC) at 3.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power supply rails, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the 1.5SMC350AHE3_A/H datasheet, 1.5SMC350AHE3_A/H pinout, 1.5SMC350AHE3_A/H application, or 1.5SMC350AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance (RθJA = 75 °C/W), and unidirectional polarity marking for correct PCB orientation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (VBR = 333–368 V at 1 mA), it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and fast response (<1 ns), critical for protecting MOSFET gates and microcontroller I/O against ESD and lightning-induced spikes.
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle, derated above 25 °C per Fig. 2, and supports operation from –65 °C to +150 °C junction temperature. Its SMC package enables automated placement and meets MSL Level 1 (260 °C reflow peak), while AEC-Q101 qualification confirms suitability for automotive powertrain and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC bias margin. |
| VBR (Breakdown) | 333–368 V at 1 mA - Voltage range where avalanche conduction initiates; ensures precise overvoltage triggering. |
| VC (Clamping) | 482 V at IPPM = 3.1 A - Maximum voltage seen by protected circuit during full-rated surge; determines stress on downstream components. |
| PPPM | 1500 W - Peak transient power handling capability with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; informs heatsinking requirements for sustained power dissipation. |
| TJ max. | +150 °C - Maximum allowable junction temperature; enables use in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, and ESD testing; supports ASIL-B system integration. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; must be routed with low-inductance trace for effective clamping. |
| Cathode | Current exit terminal during reverse avalanche | Banded end; connects to higher-potential rail (e.g., VBUS); determines directionality and clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients per IEC 61000-4-5 Level 4 (4 kV line-to-line) without derating in compact SMC footprint. |
| AEC-Q101 qualified | Validates long-term reliability in automotive environments including thermal cycling, humidity, and vibration exposure. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and consistent VBR over lifetime and temperature extremes. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; reduces manufacturing complexity and cost in high-volume production. |
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 switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping surges within 1 ns to limit voltage seen by LDOs and microcontrollers. Use Value: Withstands 1500 W pulses and maintains VC ≤ 482 V, preventing latch-up or gate oxide damage in power management ICs. |
Use Scenario: Safeguarding 4–20 mA current-loop transmitters and analog sensor outputs in factory automation PLCs. IC Role / Device Role / Timing Role: Reverse-biased across signal line and ground to clamp induced surges from motor drives or relay coils. Use Value: Low leakage (<1 μA) avoids loading precision current loops; 300 V VWM accommodates common-mode voltage swings without false triggering. |
| Telecom Line Surge Protection | DC Power Input Protection |
Use Scenario: Front-end protection for PoE-powered network switches and base station RF modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Installed on Ethernet data pairs or DC feed lines to absorb longitudinal surges before reaching PHY or DC-DC converters. Use Value: 482 V clamping voltage aligns with IEEE 802.3bt PoE++ voltage margins; bidirectional variants available if differential-mode suppression required. |
Use Scenario: Input-stage surge suppression for industrial SMPS units accepting wide-range AC/DC inputs (e.g., 90–305 VAC). IC Role / Device Role / Timing Role: Mounted across bulk capacitor input to clamp line-to-ground transients before rectification and filtering stages. Use Value: 300 V VWM allows compatibility with 230 VAC-derived rails; 1500 W rating handles EN 61000-4-5 combination wave surges up to 2 kV. |
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 | Same VWM (300 V) and VC (482 V), but lower PPPM (600 W); SMB package (DO-214AA), RθJA = 85 °C/W. | Lower surge capacity limits use to Class B/C IEC 61000-4-5; unsuitable for automotive load dump. | Select only for space-constrained non-automotive designs where 600 W suffices and thermal budget permits higher RθJA. |
| 1.5KE350A | Through-hole TO-204AE (DO-41); identical electrical specs but larger footprint, no AEC-Q101 qualification, RθJA ≈ 60 °C/W on FR-4. | Not suitable for automated SMT lines; lacks automotive qualification; requires manual assembly or wave soldering. | Choose only for legacy through-hole designs or prototyping where board real estate and qualification are secondary. |
Compared with SMBJ350A-E3/52 and 1.5KE350A, the 1.5SMC350AHE3_A/H delivers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal and qualification profile), AEC-Q101 compliance for automotive deployment, and optimized SMT manufacturability - making it the preferred choice for high-reliability, volume-manufactured systems.
Availability
1.5SMC350AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom infrastructure requiring stable component supply with guaranteed AEC-Q101 qualification and SMC package consistency.
Supply support for 1.5SMC350AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where AEC-Q101 validation, 1500 W surge capability, and SMC package manufacturability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC350AHE3_A/H under full-rated surge conditions?
The 1.5SMC350AHE3_A/H has a maximum clamping voltage (VC) of 482 V when subjected to its rated peak pulse current (IPPM) of 3.1 A with a 10/1000 μs waveform. This value is measured per Fig. 1 and Table on page 2 of Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 1.5SMC350AHE3_A/H qualified for automotive applications?
Yes, the 1.5SMC350AHE3_A/H carries AEC-Q101 qualification, confirmed by its "HE3" 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 ESD, enabling use in automotive powertrain, body control, and ADAS subsystems.
What does the "_A/H" suffix indicate in 1.5SMC350AHE3_A/H?
The "_A/H" suffix in 1.5SMC350AHE3_A/H denotes AEC-Q101 qualification level "A" (applicable to 1.5SMC6.8A–1.5SMC220A devices per Note 1, page 3) and packaging in 7-inch plastic tape and reel (code "H", 850 units per reel). Though 1.5SMC350A falls outside the _A range per Note 1, Vishay's ordering table explicitly lists 1.5SMC350AHE3_A/H - confirming its AEC-Q101 status and H-reel configuration.
How does the thermal performance of the 1.5SMC350AHE3_A/H compare to similar TVS diodes?
The 1.5SMC350AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads - lower than SMBJ-series devices (e.g., SMBJ350A: 85 °C/W) due to larger SMC pad area. This enables higher sustained power dissipation and improved reliability in thermally constrained layouts.
Can the 1.5SMC350AHE3_A/H be used in bidirectional configurations?
No - the "A" suffix in 1.5SMC350AHE3_A/H designates unidirectional operation. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC350CA). Using this part in bidirectional applications would result in forward conduction during negative transients, causing failure. Always verify polarity marking (cathode band) during layout.
1.5SMC350AHE3_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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC350AHE3_A/H FAQ
1.How can I place an order for 1.5SMC350AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC350AHE3_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 1.5SMC350AHE3_A/H reliable?
The price and inventory of 1.5SMC350AHE3_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 1.5SMC350AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC350AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC350AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC350AHE3_A/H?
1.5SMC350AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC350AHE3_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 1.5SMC350AHE3_A/H?
For technical support, including 1.5SMC350AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC350AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC350AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC350AHE3_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 1.5SMC350AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC350AHE3_A/H?
All 1.5SMC350AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC350AHE3_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 1.5SMC350AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC350AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC350AHE3_A/H Tags
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