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Vishay General Semiconductor - Diodes Division 1.5SMC350AHE3_A/I
- Part No.:
- 1.5SMC350AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC350AHE3_A/I.pdf
- Description:
- TVS DIODE 300VWM 482VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,087
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Product details
Overview
1.5SMC350AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 350 V standoff voltage (VWM), 368 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It clamps transients to 482 V at 3.1 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 1.5SMC350AHE3_A/I datasheet, 1.5SMC350AHE3_A/I pinout, 1.5SMC350AHE3_A/I application, or 1.5SMC350AHE3_A/I equivalent, this device serves as a robust, low-leakage (≤1 µA at VWM), fast-response overvoltage clamp for high-voltage DC bus lines, battery management systems, and industrial power supplies where reliability under lightning-induced surges and inductive switching events is critical.
Technical Context
The 1.5SMC350AHE3_A/I operates as a unidirectional avalanche diode with a cathode-band polarity marking, designed for reverse-biased transient suppression. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 µs pulses at 0.01% duty cycle.
Thermally, it features a junction-to-ambient thermal resistance of 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and supports operation from –65 °C to +150 °C. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood applications requiring long-term reliability under thermal cycling and mechanical stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working margin in high-voltage rails. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events without premature conduction. |
| VC (Clamping Voltage) | 482 V at IPPM = 3.1 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy-handling capability per IEEE/ANSI C62.35 waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | ≤1 µA at 300 V - Negligible standby current; avoids power loss or signal distortion in high-impedance sensing or bias networks. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line | Provides low forward voltage drop (VF ≈ 3.5 V at 100 A) during fault conditions; used only in unidirectional configuration. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side (e.g., DC+ rail) | Defines clamping direction: conducts when cathode-to-anode voltage exceeds VBR; anchors protection reference point. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-enables use in engine control units and ADAS power stages. |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients such as ISO 7637-2 Pulse 5a/b without degradation; eliminates need for cascaded protection stages. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage drift over time, and immunity to moisture-induced parameter shift in humid environments. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; reduces manufacturing complexity and BOM risk. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during surge events-critical for safeguarding 400 V-class MOSFETs and gate drivers in motor drives. |
Applications
| Automotive Battery Management | Industrial DC Link Protection |
|---|---|
Use Scenario: Suppresses load-dump spikes (up to 120 V) and alternator ripple transients on 48 V and 12 V battery rails in EV/HEV BMS modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery positive and ground, clamping within nanoseconds to protect monitoring ICs and isolation amplifiers. Use Value: Withstands 200 A IFSM and maintains ≤1 µA leakage at 300 V, ensuring minimal impact on coulomb counting accuracy and system quiescent current. |
Use Scenario: Protects IGBT gate drivers and DC-link capacitors in servo drives and UPS inverters exposed to inductive kickback from 400–800 V DC buses. IC Role / Device Role / Timing Role: Mounted directly across DC+ and DC− near power stage, acting as last-line clamping element before sensitive control circuitry. Use Value: 482 V clamping at 3.1 A limits voltage stress on 600 V-rated gate drivers, preventing false triggering or latch-up during 10/1000 µs surges. |
| Telecom Power Supply Input | Renewable Energy Charge Controller |
Use Scenario: Shields AC/DC front-end rectifiers and PFC controllers in outdoor telecom base station PSUs from lightning-induced common-mode surges on -48 V input lines. IC Role / Device Role / Timing Role: Installed at input filter stage, oriented cathode-to-rail, providing fast (<1 ns) response to differential-mode transients exceeding 1 kV. Use Value: Low thermal resistance (RθJA = 75 °C/W) and 150 °C TJ max enable reliable operation in sealed, fanless enclosures with ambient up to 85 °C. |
Use Scenario: Safeguards MPPT controller inputs connected to photovoltaic arrays subject to rapid voltage transients during cloud-edge events or string disconnection. IC Role / Device Role / Timing Role: Placed across PV+ and PV− terminals upstream of input EMI filter, absorbing energy from >10 kV open-circuit surges. Use Value: 300 V VWM provides sufficient margin above 250 V nominal array voltage while maintaining tight 368 V VBR tolerance for precise overvoltage thresholding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ350A-E3/57T | Same VWM/VBR/VC specs but in smaller SMA (DO-214AC) package; lower PPPM (400 W); no AEC-Q101 qualification. | Limited to low-energy consumer or non-automotive industrial use; unsuitable for automotive or high-reliability 1500 W surge requirements. | Select only if board space is constrained and surge energy is <400 W; verify thermal derating on smaller pad layout. |
| 1.5KE350A | Through-hole DO-201AD package; identical electrical specs but higher RθJA (100 °C/W); not AEC-Q101 qualified. | Requires wave soldering or hand assembly; incompatible with fully SMT production; lacks automotive qualification documentation. | Choose only for prototyping or legacy through-hole designs; avoid for new automotive or high-volume SMT production. |
Compared with SMAJ350A-E3/57T and 1.5KE350A, the 1.5SMC350AHE3_A/I delivers full 1500 W surge handling in an SMT-compatible, AEC-Q101-qualified package with superior thermal performance (RθJA = 75 °C/W) and verified automotive reliability-making it the only option suitable for production-grade automotive and industrial power systems demanding both high energy absorption and long-term field stability.
Availability
1.5SMC350AHE3_A/I is available at Aetrix Electronics and suitable for automotive battery management, industrial DC link protection, telecom power supply input, and renewable energy charge controller applications requiring stable component supply, AEC-Q101 compliance, and high-energy transient suppression.
Supply support for 1.5SMC350AHE3_A/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS solutions for automotive, industrial, and telecom systems where compact size, AEC-Q101 qualification, and repeatable clamping performance under harsh surge conditions are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC350AHE3_A/I under a 10/1000 µs surge?
The 1.5SMC350AHE3_A/I clamps to a maximum of 482 V when subjected to its rated peak pulse current of 3.1 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Mar-2026, ensuring predictable overvoltage limiting for downstream 500 V-class components.
Is the 1.5SMC350AHE3_A/I suitable for automotive applications?
Yes, the 1.5SMC350AHE3_A/I is AEC-Q101 qualified and carries the "HE3" suffix denoting RoHS-compliant and automotive-grade construction. It is explicitly rated for under-hood environments with operating junction temperatures up to +150 °C and validated for thermal cycling, humidity bias, and mechanical shock-making it appropriate for engine control units, battery disconnect units, and ADAS power stages.
What does the "_A/I" suffix mean in 1.5SMC350AHE3_A/I?
The "_A" denotes the voltage variant (350 V VWM) and AEC-Q101 qualification level for the 1.5SMC350A series, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a 3500-unit quantity per reel. This format aligns with Vishay's ordering nomenclature in Document Number 88303 and ensures compatibility with high-speed SMT placement equipment.
How does the 1.5SMC350AHE3_A/I differ from bidirectional TVS diodes like 1.5SMC350CA?
The 1.5SMC350AHE3_A/I is unidirectional and features a cathode band for polarity-sensitive placement, enabling asymmetric clamping only in reverse bias. In contrast, 1.5SMC350CA is bidirectional with no polarity marking and clamps symmetrically in both directions-making it suitable for AC line or data-line protection, whereas the 1.5SMC350AHE3_A/I is optimized for DC bus and power rail protection.
What is the maximum reverse leakage current of the 1.5SMC350AHE3_A/I at its rated standoff voltage?
At its rated standoff voltage of 300 V (VWM), the 1.5SMC350AHE3_A/I exhibits a maximum reverse leakage current of 1 µA, measured at 25 °C. This ultra-low leakage preserves system efficiency in high-impedance monitoring circuits and prevents false triggering in precision voltage-sensing paths commonly found in battery management and power quality analyzers.
1.5SMC350AHE3_A/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:
- 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/I FAQ
1.How can I place an order for 1.5SMC350AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC350AHE3_A/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 1.5SMC350AHE3_A/I reliable?
The price and inventory of 1.5SMC350AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC350AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC350AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC350AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC350AHE3_A/I?
1.5SMC350AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC350AHE3_A/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 1.5SMC350AHE3_A/I?
For technical support, including 1.5SMC350AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC350AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC350AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC350AHE3_A/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 1.5SMC350AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC350AHE3_A/I?
All 1.5SMC350AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC350AHE3_A/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 1.5SMC350AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC350AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC350AHE3_A/I Tags
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Diodes Incorporated
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