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Vishay General Semiconductor - Diodes Division SMA6F45A-M3/H
- Part No.:
- SMA6F45A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F45A-M3/H.pdf
- Description:
- 600W,45V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F45A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), 72.3 V clamping voltage (VC) at 8.3 A (10/1000 μs), 600 W peak pulse power, and IEC 61000-4-2 Level 4 ESD immunity (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F45A-M3/H datasheet, SMA6F45A-M3/H pinout, SMA6F45A-M3/H application, or SMA6F45A-M3/H equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in consumer, industrial, and telecom equipment where low-profile mounting and high surge capability are critical.
Technical Context
This TVS diode operates as a unidirectional Zener-clamped protector with sharp avalanche breakdown behavior. Its clamping performance is defined by dynamic resistance (RD = 2.05 Ω) and temperature coefficient (αT = 10.2 × 10⁻⁴ /°C), enabling predictable voltage regulation under transient stress across -55 °C to +175 °C junction temperature range.
It delivers 600 W peak pulse power (10/1000 μs) and 4 kW (8/20 μs), with thermal resistance junction-to-ambient of 120–150 °C/W on FR4 PCB. The M3 suffix confirms halogen-free, RoHS-compliant construction, JESD201 Class 2 whisker resistance, and MSL Level 1 moisture sensitivity rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 50.0 V / 55.3 V at 1 mA - ensures reliable turn-on within specified tolerance band |
| VC @ IPP | 72.3 V at 8.3 A (10/1000 μs) - limits downstream voltage during surge to safe level |
| PPPM (10×1000 μs) | 600 W - sustains high-energy transients without failure on standard PCB layout |
| ID @ VWM | 0.2 μA max - negligible leakage current preserves system efficiency in standby |
| TJ max | +175 °C - supports operation in high-temperature industrial environments |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - meets stringent end-equipment immunity requirements |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low profile (0.95 mm typical height), matte tin-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential rail in unidirectional protection configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., VCC or signal); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm) | Enables use in space-constrained portable and stacked PCB designs without height interference |
| Peak pulse power: 4 kW (8/20 μs) | Withstands severe lightning-induced surges common in telecom and outdoor industrial interfaces |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirement and supports standard SMT assembly processes |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance mandates for global electronics manufacturing and disposal |
| Unidirectional configuration | Optimized for DC power rail and single-polarity signal line protection with minimal capacitance impact |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from relay and solenoid switching. IC Role / Device Role: Unidirectional TVS placed between MOSFET gate and source to clamp inductive kickback. Use Value: Prevents gate oxide damage and logic upset with 72.3 V clamping at 8.3 A, ensuring system reliability over 100,000 switching cycles. | Use Scenario: Input-stage surge suppression on 48 V DC telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role: Primary overvoltage clamp on secondary-side DC bus before POL converters. Use Value: Absorbs 4 kW (8/20 μs) surges while maintaining <0.2 μA leakage, preserving no-load efficiency and meeting GR-1089-CORE requirements. |
| Automotive Body Control Modules | Consumer USB-C Power Delivery |
Use Scenario: Protection of LIN bus transceivers and sensor inputs against load dump and jump-start transients. IC Role / Device Role: Unidirectional TVS on 12 V supply rail feeding microcontroller peripherals. Use Value: Clamps to 72.3 V within nanoseconds, limiting voltage seen by 5 V LDOs and preventing brownout resets during ISO 7637-2 Pulse 5a events. | Use Scenario: Overvoltage guard on VBUS line of USB-C receptacles handling up to 20 V PD negotiation. IC Role / Device Role: Secondary-level TVS after primary front-end protection, targeting fast transient suppression. Use Value: Provides 15 kV air-gap ESD immunity and sub-100 ns response to meet USB-IF compliance, with 0.95 mm height enabling low-profile connector integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F45A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel vs. 3,500 pcs/reel for H) | Identical protection function; suited for high-volume automated assembly requiring larger reels | Select SMA6F45A-M3/6B when optimizing for feeder change frequency and long-run SMT line uptime |
| SMAJ45A-M3/5B | Higher 400 W PPPM (10/1000 μs), larger SMA (DO-214AC) package, 73 V VC @ 7.5 A | Lower surge rating and 2.3 mm height limit suitability to less demanding or non-height-critical layouts | Choose SMAJ45A-M3/5B only if board space allows taller profile and 600 W rating is not required |
Compared with SMA6F45A-M3/H, SMA6F45A-M3/6B offers identical protection performance with higher reel quantity for production efficiency, while SMAJ45A-M3/5B trades 33 % lower surge capability and greater height for broader distributor availability and legacy footprint compatibility.
Availability
SMA6F45A-M3/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer USB-C power delivery systems requiring stable component supply and consistent M3-grade environmental compliance.
Supply support for SMA6F45A-M3/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 and application-specific optimization.
The SMA6F series is engineered for high-surge, low-profile transient protection in space-constrained DC power and signal line applications across industrial, telecom, and automotive markets.
FAQ
What is the clamping voltage of SMA6F45A-M3/H under a 10/1000 μs surge?
The SMA6F45A-M3/H has a maximum clamping voltage (VC) of 72.3 V at 8.3 A for a 10/1000 μs waveform. This value is measured per standard test conditions and reflects the peak voltage seen across the device during surge conduction, directly limiting stress on downstream components like MOSFETs or ICs powered from the same rail.
Is SMA6F45A-M3/H suitable for bidirectional transient protection?
No, SMA6F45A-M3/H is a unidirectional TVS diode and must be used only in circuits where reverse polarity is not expected. It conducts in forward bias like a standard diode and clamps only in reverse bias. For bidirectional protection, a dedicated bidirectional TVS such as SMBJ45CA or equivalent must be selected instead of SMA6F45A-M3/H.
What does the "H" suffix mean in SMA6F45A-M3/H?
The "H" suffix in SMA6F45A-M3/H denotes the preferred package code for tape-and-reel delivery: 7-inch diameter plastic tape and reel containing 3,500 units. It is mechanically and electrically identical to other SMA6F45A-M3 variants (e.g., /6B), differing only in packaging format and reel size - not in electrical performance or construction.
Does SMA6F45A-M3/H meet automotive AEC-Q200 requirements?
No, SMA6F45A-M3/H is not AEC-Q200 qualified. It is rated for industrial-grade operation (-55 °C to +175 °C TJ) and meets IEC 61000-4-2 ESD standards, but lacks the stress testing, qualification reporting, and traceability required for automotive qualification. For AEC-Q200 applications, consider Vishay's Automotive Grade TVS series such as AEC-Q200-compliant SMA6F45AHE3/5B instead of SMA6F45A-M3/H.
Can SMA6F45A-M3/H be used on AC signal lines?
No, SMA6F45A-M3/H is unidirectional and unsuitable for AC signal lines without external biasing. Applying alternating voltage will cause forward conduction during one half-cycle, leading to excessive current and potential failure. For AC line protection, a bidirectional TVS or appropriately configured back-to-back unidirectional pair is required - SMA6F45A-M3/H alone cannot perform this function safely.
SMA6F45A-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.3V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F45A-M3/H FAQ
1.How can I place an order for SMA6F45A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F45A-M3/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 SMA6F45A-M3/H reliable?
The price and inventory of SMA6F45A-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F45A-M3/H is usually 5 days.
3.What payment methods are accepted for SMA6F45A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F45A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F45A-M3/H?
SMA6F45A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F45A-M3/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 SMA6F45A-M3/H?
For technical support, including SMA6F45A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F45A-M3/H requirements.
6.How does Aetrix verify that SMA6F45A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F45A-M3/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 SMA6F45A-M3/H meets industry standards.
7.What is the process for return or replacement of SMA6F45A-M3/H?
All SMA6F45A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F45A-M3/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 SMA6F45A-M3/H part is unused and in its original packaging.
Return procedure for SMA6F45A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F45A-M3/H Tags
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