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Vishay General Semiconductor - Diodes Division 1.5SMC300A-M3/9AT
- Part No.:
- 1.5SMC300A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC300A-M3/9AT.pdf
- Description:
- TVS DIODE 256VWM 414VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,485
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Product details
Overview
1.5SMC300A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 300 V standoff voltage (VWM), 344 V clamping voltage (VC) at 3.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs). It protects power rails and signal lines in industrial motor drives and automotive ECUs against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC300A-M3/9AT datasheet, 1.5SMC300A-M3/9AT pinout, 1.5SMC300A-M3/9AT application, or 1.5SMC300A-M3/9AT equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C, unidirectional polarity marking, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 μA leakage at 256 V), then avalanches sharply at breakdown (VBR min = 285 V, max = 315 V @ 1 mA) to clamp transient energy within safe limits. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
The device uses a single P-N junction with cathode-band polarity marking, optimized for fast response (<1 ns) and repetitive 10/1000 μs surge handling at 0.01% duty cycle. Thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ max = 150 °C) define its continuous power dissipation ceiling (PD = 6.5 W at TA = 50 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 256 V - Maximum continuous reverse voltage before significant leakage; sets upper bound for protected circuit operating voltage. |
| VBR (Breakdown) | 285–315 V @ 1 mA - Voltage range where avalanche conduction initiates; defines minimum clamping threshold under transient stress. |
| VC (Clamping) | 414 V @ IPPM = 3.6 A - Peak voltage seen by downstream circuit during 10/1000 μs surge; must stay below IC's absolute max rating. |
| PPPM | 1500 W - Peak transient power absorption capability; determines survivability of standardized lightning/surge waveforms. |
| ID (Leakage) | 1.0 μA max @ VWM - Low reverse leakage preserves efficiency in high-impedance bias networks and minimizes standby power loss. |
| TJ max | +150 °C - Maximum junction temperature; constrains PCB copper pad area and ambient operating envelope in sealed enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pads; supports automated placement and reflow. |
Pinout & Package
SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, cathode indicated by a band on one end. Designed for mounting on 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; forms current path during reverse-biased avalanche event. |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 24 V rail); carries full surge current into ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating in standard layouts. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress; eliminates surface contamination sensitivity. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for environmentally constrained applications. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 10 kV/μs), improving clamping fidelity. |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
Use Scenario: Protection of 24 V DC input stage against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 120 V load dump spikes to ≤414 V, preventing damage to upstream MOSFETs and controller ICs rated to 450 V. |
Use Scenario: Surge suppression on CAN FD data lines exposed to ISO 7637-2 Pulse 5a/b transients. IC Role / Device Role / Timing Role: Standoff protection element on power-supply side of isolated CAN transceiver. Use Value: Limits voltage excursion to 414 V during 100 V/50 ms transients, preserving transceiver isolation barrier integrity. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Input-stage protection for PoE-powered remote radios subjected to induced lightning surges. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC feed line prior to DC-DC regulation. Use Value: Absorbs 1500 W peak energy from 10/1000 μs waveform, maintaining output regulation during Category A/B lightning events. |
Use Scenario: DC-link overvoltage suppression in solar string inverters during rapid grid disconnection. IC Role / Device Role / Timing Role: Parallel-connected TVS across 600 V DC bus to clamp switching-induced voltage spikes. Use Value: Activates at 285 V to clamp bus voltage to 414 V, preventing IGBT gate oxide failure and capacitor overvoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | Lower PPPM (600 W), same VWM (256 V), smaller SMB package (DO-214AA), RθJA = 110 °C/W. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without parallel staging. | Select when board space is constrained and surge threat level is ≤Level 2 (1 kV line-ground). |
| 1.5KE300A | Through-hole TO-204AE (DO-201AE) package, identical electrical specs, higher RθJA (125 °C/W), no M3 halogen-free option. | Requires wave soldering; incompatible with fully SMT production; not suitable for high-density automotive modules. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with 1.5SMC300A-M3/9AT, SMBJ300A trades peak power and thermal performance for footprint reduction, while 1.5KE300A retains identical clamping but sacrifices SMT manufacturability and halogen-free compliance-making the 1.5SMC300A-M3/9AT optimal for high-reliability, volume SMT deployments.
Availability
1.5SMC300A-M3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, telecom power feeds, and renewable energy inverters requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified alternatives.
Supply support for 1.5SMC300A-M3/9AT 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 qualification.
The 1.5SMC Series targets high-energy transient suppression in harsh environments, designed specifically for industrial automation, automotive electronics, and telecom infrastructure where 1500 W surge immunity and MSL Level 1 reflow compatibility are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC300A-M3/9AT under a 10/1000 μs surge?
The 1.5SMC300A-M3/9AT has a maximum clamping voltage (VC) of 414 V when subjected to its rated peak pulse current (IPPM) of 3.6 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC300A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC300A-M3/9AT halogen-free and RoHS-compliant?
Yes, the 1.5SMC300A-M3/9AT carries the M3 suffix, which denotes halogen-free construction and full RoHS compliance per EU Directive 2015/863. This is confirmed in the Mechanical Data section of Vishay document 88303, where M3 is explicitly defined as "halogen-free, RoHS-compliant, commercial grade." The 1.5SMC300A-M3/9AT meets IPC-1752A material declaration requirements and supports environmentally regulated designs.
Does the 1.5SMC300A-M3/9AT have AEC-Q101 qualification?
No, the 1.5SMC300A-M3/9AT is not AEC-Q101 qualified. Per Vishay document 88303, AEC-Q101 qualification applies only to variants with HE3 or HM3 suffixes and revision codes (e.g., 1.5SMC300AHM3_B/I), and specifically covers the 250 V to 540 V range with _B revision. The 1.5SMC300A-M3/9AT falls outside that qualified subset and is rated for commercial-grade operation (-65 °C to +150 °C).
What is the thermal resistance of the 1.5SMC300A-M3/9AT?
The 1.5SMC300A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad layout per JEDEC standards. This value is specified in the Thermal Characteristics table of Vishay document 88303 and directly impacts power derating above 25 °C ambient. The 1.5SMC300A-M3/9AT also exhibits RθJL = 15 °C/W (junction-to-leads), supporting effective heat transfer to PCB planes.
How is polarity marked on the 1.5SMC300A-M3/9AT?
The 1.5SMC300A-M3/9AT uses a cathode band marking on the SMC (DO-214AB) package body to indicate the cathode terminal. As a unidirectional TVS, the banded end connects to the protected line (e.g., 24 V rail), while the unbanded end (anode) connects to ground. This polarity convention is consistent across the 1.5SMC series and documented in the Mechanical Data section of Vishay document 88303.
1.5SMC300A-M3/9AT 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:
- Active
- 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC300A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC300A-M3/9AT 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-M3/9AT reliable?
The price and inventory of 1.5SMC300A-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC300A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC300A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC300A-M3/9AT?
1.5SMC300A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC300A-M3/9AT 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-M3/9AT?
For technical support, including 1.5SMC300A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC300A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC300A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC300A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC300A-M3/9AT?
All 1.5SMC300A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC300A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC300A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC300A-M3/9AT Tags
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DESD3V3E1BL-7B
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