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Vishay General Semiconductor - Diodes Division 1.5SMC300A-E3/9AT
- Part No.:
- 1.5SMC300A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC300A-E3/9AT.pdf
- Description:
- TVS DIODE 256VWM 414VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,236
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Product details
Overview
1.5SMC300A-E3/9AT 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 300 V standoff voltage (VWM), 344 V clamping voltage (VC) at 3.6 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform. It is used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives and automotive power modules.
For engineers reviewing the 1.5SMC300A-E3/9AT datasheet, 1.5SMC300A-E3/9AT pinout, 1.5SMC300A-E3/9AT application, or 1.5SMC300A-E3/9AT equivalent, key selection criteria include its 300 V reverse standoff rating, low 0.110 %/°C VBR temperature coefficient, RoHS-compliant matte tin-plated SMC (DO-214AB) package, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This device operates as a unidirectional avalanche diode, clamping transient overvoltages above its breakdown threshold (VBR = 285–315 V at 1 mA) while maintaining low leakage (<1.0 μA at VWM). Its glass-passivated junction ensures stable performance under repetitive surge stress and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility.
The 1.5SMC300A-E3/9AT delivers 1500 W peak pulse power handling with minimal clamping overshoot-VC = 414 V at IPPM = 3.6 A-and exhibits low incremental surge resistance for fast response (<1.0 ns typical). Thermal resistance is RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads, supporting reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC operating margin. |
| VBR (Breakdown) | 285–315 V at 1 mA - Avalanche onset range; determines precise clamping initiation threshold under transient conditions. |
| VC (Clamping) | 414 V at IPPM = 3.6 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for downstream component survivability. |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 μs waveform; enables robust lightning and inductive-switching surge immunity. |
| ID (Leakage) | <1.0 μA at VWM - Ultra-low reverse leakage preserves system efficiency and prevents false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow processes. |
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; forms conduction path during reverse transients when cathode is held higher. |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential rail (e.g., VBUS); provides low-impedance shunt path to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating on standard PCB layouts. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per JESD22-A101. |
| MSL Level 1 rating | Supports unlimited floor life and single-reflow assembly at 260 °C peak, eliminating bake requirements prior to SMT. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes let-through energy to sensitive downstream components such as gate drivers and microcontrollers. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants are qualified for automotive powertrain and body electronics per stress test requirements. |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
Use Scenario: Protection of IGBT gate driver supply rails against switching-induced voltage spikes and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver VDD and GND to clamp positive-going surges exceeding 300 V. Use Value: Prevents gate oxide damage and false turn-on by limiting transient voltage to ≤414 V during 1500 W surges. |
Use Scenario: Input protection for 12 V/24 V DC-DC converters in engine control units exposed to ISO 7637-2 Pulse 5a/b. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on main input bus, absorbing >100 A pulses with sub-ns response. Use Value: Maintains converter uptime by surviving repeated 300 V/100 A transients without degradation or parametric shift. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Surge protection on -48 V telecom power distribution boards subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, suppressing positive transients on negative-rail systems. Use Value: Ensures uninterrupted service by meeting GR-1089-CORE Level 3 requirements with verified 1500 W capability. |
Use Scenario: DC-link overvoltage suppression in solar string inverters during rapid PV array disconnection or grid fault recovery. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC-link capacitors to limit voltage rise during dV/dt events. Use Value: Extends capacitor lifetime and avoids crowbar activation by clamping transients to 414 V at 3.6 A peak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A-E3/52T | Lower PPPM (600 W), same VWM (300 V), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select only when board space is constrained and surge threat level is ≤600 W. |
| 1.5KE300A-T | Through-hole DO-201 package, identical electrical specs, higher mechanical robustness but no RoHS/E3 compliance | Not suitable for automated SMT lines; requires wave soldering and manual inspection. | Choose only for legacy through-hole designs or where reflow compatibility is not required. |
Compared with SMBJ300A-E3/52T and 1.5KE300A-T, the 1.5SMC300A-E3/9AT uniquely combines 1500 W SMT-compatible surge handling, RoHS/E3 compliance, and standardized 3500-piece 13″ reel packaging-making it optimal for high-volume industrial and automotive production requiring full traceability and process reliability.
Availability
1.5SMC300A-E3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, telecom power feeds, and renewable energy inverters requiring stable component supply, full RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for 1.5SMC300A-E3/9AT 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, power handling, and automotive-grade qualification.
The 1.5SMC Series was developed for high-power surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are essential.
FAQ
What is the maximum clamping voltage of the 1.5SMC300A-E3/9AT under a 10/1000 μs surge?
The 1.5SMC300A-E3/9AT has a maximum clamping voltage (VC) of 414 V when subjected to its rated peak pulse current of 3.6 A with a 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 standardized surge events.
Is the 1.5SMC300A-E3/9AT RoHS-compliant and lead-free?
Yes, the 1.5SMC300A-E3/9AT is RoHS-compliant and lead-free. The "E3" suffix explicitly denotes Vishay's commercial-grade, RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance requirements.
Does the 1.5SMC300A-E3/9AT have AEC-Q101 qualification?
The base 1.5SMC300A-E3/9AT is not AEC-Q101 qualified; however, Vishay offers AEC-Q101-qualified versions under the HE3 and HM3 suffixes (e.g., 1.5SMC300AHE3_B/I). These variants undergo full stress testing per AEC-Q101 and are designated for automotive powertrain and body electronics applications.
What is the thermal resistance of the 1.5SMC300A-E3/9AT in standard mounting conditions?
The 1.5SMC300A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value assumes still air and defines allowable power dissipation limits for sustained operation.
How does the 1.5SMC300A-E3/9AT differ from bidirectional TVS diodes like 1.5SMC300CA?
The 1.5SMC300A-E3/9AT is unidirectional and features a cathode band for polarity identification, enabling asymmetric clamping only in reverse bias. In contrast, 1.5SMC300CA is bidirectional with symmetrical clamping in both directions and no polarity marking-making it suitable for AC line or differential signal protection where polarity reversal occurs.
1.5SMC300A-E3/9AT 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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC300A-E3/9AT FAQ
1.How can I place an order for 1.5SMC300A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC300A-E3/9AT 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 1.5SMC300A-E3/9AT reliable?
The price and inventory of 1.5SMC300A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC300A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC300A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC300A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC300A-E3/9AT?
1.5SMC300A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC300A-E3/9AT 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 1.5SMC300A-E3/9AT?
For technical support, including 1.5SMC300A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC300A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC300A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC300A-E3/9AT 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 1.5SMC300A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC300A-E3/9AT?
All 1.5SMC300A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC300A-E3/9AT, 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 1.5SMC300A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC300A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC300A-E3/9AT Tags
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Diodes Incorporated
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