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Vishay General Semiconductor - Diodes Division SMA6F48A-M3/I
- Part No.:
- SMA6F48A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F48A-M3/I.pdf
- Description:
- 600W,48V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,568
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Product details
Overview
SMA6F48A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 76.9 V maximum clamping voltage at 10/1000 μs (IPP = 48 A), 600 W peak pulse power, and ESD immunity per IEC 61000-4-2 level 4 (15 kV air / 8 kV contact). It protects MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMA6F48A-M3/I datasheet, SMA6F48A-M3/I pinout, SMA6F48A-M3/I application, or SMA6F48A-M3/I equivalent, key selection criteria include clamping voltage at rated surge current, thermal resistance (RθJA = 120–150 °C/W), unidirectional polarity, MSL level 1 rating, and compatibility with automated SMT placement on FR4 PCBs with 2 oz. copper.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device, triggered when reverse voltage exceeds its 48 V stand-off threshold. Its silicon avalanche structure provides fast response (< 1 ns) to transient events such as inductive switching spikes and ESD, with clamping governed by dynamic resistance (RD = 2.31 Ω) and VBR max.
The device is optimized for low-profile applications requiring minimal board space: height ≤ 0.95 mm, SlimSMA (DO-221AC) footprint, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and halogen-free, RoHS-compliant construction per M3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - Ensures reliable triggering across temperature and process variation |
| VC @ IPP | 76.9 V at 48 A (10/1000 μs) - Limits downstream voltage stress during surge events |
| PPPM | 600 W (10/1000 μs), 4000 W (8/20 μs) - Supports high-energy transient suppression in industrial environments |
| ID @ VWM | ≤ 0.2 μA - Negligible leakage in standby, critical for low-power sensor interfaces |
| TJ max | 175 °C - Enables operation in under-hood automotive or high-temperature industrial enclosures |
| 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), 2-terminal surface-mount package with cathode band marking; dimensions: 4.15 × 2.50 × 0.95 mm (L × W × H); MSL level 1, reflow compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias or transient conduction | Connected to protected line (e.g., VBUS or signal trace) when used in unidirectional configuration |
| Cathode | Current exit point; marked by color band | Connected to ground or lower-potential reference; defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SlimSMA package | 0.95 mm height enables use in ultra-thin consumer and portable electronics |
| High surge capability | 4 kW peak pulse power (8/20 μs) supports lightning-induced surges in telecom and industrial ports |
| Automated placement compatibility | Matte tin-plated leads and defined tape-and-reel packaging (14,000 pcs/reel, 13″) ensure high-yield SMT assembly |
| Thermal robustness | RθJM = 12–15 °C/W enables effective heat transfer to PCB copper, sustaining repeated transients without thermal runaway |
| Halogen-free & RoHS | M3 suffix confirms compliance with environmental regulations and whisker resistance (JESD201 Class 2) |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers against load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going transients to ≤ 76.9 V, preventing damage to upstream DC-DC converters and microcontrollers. Use Value: With 600 W (10/1000 μs) rating and 175 °C junction limit, SMA6F48A-M3/I sustains repeated 50 A surges without degradation in harsh factory environments. | Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in door modules exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Acts as primary ESD clamp on bidirectional data lines, leveraging 8 kV contact / 15 kV air IEC 61000-4-2 immunity. Use Value: Ultra-low leakage (≤ 0.2 μA) avoids signal integrity impact on 19.2 kbps LIN communication, while SlimSMA footprint fits tight PCB layouts. |
| Telecom PoE Interface | Consumer USB-C Power Delivery |
Use Scenario: Clamping induced surges on IEEE 802.3af/at PSE/PD Ethernet pairs carrying up to 57 V DC power. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each powered pair to suppress common-mode transients before magnetics and PHY ICs. Use Value: 76.9 V clamping ensures safe operation below the 60 V absolute maximum rating of typical PoE interface ICs. | Use Scenario: Protecting VBUS lines in USB-C receptacles against hot-plug transients and external ESD during mating/unmating. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs 15 kV air-gap ESD pulses before they reach USB PD controller and port protection switches. Use Value: 0.95 mm profile allows placement adjacent to USB-C connector without interfering with mechanical stacking height. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F48AHE3/52 (Vishay) | Same electrical specs; differs only in packaging (tape-and-reel code "52" vs "I") and JEDEC-compliant lead finish | No functional difference; identical thermal and clamping performance | Select SMA6F48A-M3/I for 13″ reel volume orders with M3 halogen-free compliance; choose HE3/52 for legacy procurement systems referencing older ordering codes |
| SMBJ48A (Bourns) | Higher RθJA (130 °C/W), larger SMB (DO-214AA) package (4.57 × 3.94 × 2.29 mm), same VWM/VBR/VC ratings | Less suitable for ultra-thin designs; requires more PCB area and higher thermal mass for equivalent surge handling | Use SMBJ48A only if existing layout uses SMB footprint; SMA6F48A-M3/I offers 55 % lower height and 30 % smaller footprint with equal protection level |
Compared with SMA6F48AHE3/52, SMA6F48A-M3/I delivers identical protection performance with verified M3 environmental compliance and 13″ reel logistics; versus SMBJ48A, it enables miniaturized designs with no compromise in clamping voltage or surge rating, though thermal management must account for its higher power density.
Availability
SMA6F48A-M3/I is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom PoE interfaces, and consumer USB-C power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for SMA6F48A-M3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMA6FxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in space-constrained, high-reliability applications across industrial, automotive, and communications markets.
FAQ
What is the clamping voltage of SMA6F48A-M3/I at its rated peak pulse current?
The SMA6F48A-M3/I has a maximum clamping voltage (VC) of 76.9 V at 48 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and reflects the actual voltage seen by downstream components during surge events. The clamping behavior is determined by the device's dynamic resistance (2.31 Ω) and breakdown voltage ceiling, ensuring predictable protection margins for 48 V system rails.
Is SMA6F48A-M3/I suitable for bidirectional transient protection?
No, SMA6F48A-M3/I is a unidirectional TVS diode and is not suitable for bidirectional protection. Its design clamps only positive-going transients relative to the cathode terminal; reverse polarity events will not be suppressed. For bidirectional applications-such as AC lines or differential data buses-engineers must select a dedicated bidirectional variant like SMA6F48CA or use back-to-back unidirectional devices. The datasheet explicitly states "Unidirectional only" under FEATURES.
What does the "M3/I" suffix mean in SMA6F48A-M3/I?
The "M3" suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD201 Class 2 whisker testing. The "I" denotes the preferred package code for 13″ diameter plastic tape-and-reel delivery containing 14,000 units, per Vishay's ordering information table. This distinguishes it from alternate reels (e.g., "H" for 7″ reels) and non-M3 variants lacking environmental compliance certifications.
Can SMA6F48A-M3/I be used in automotive under-hood applications?
Yes, SMA6F48A-M3/I is qualified for automotive under-hood use due to its 175 °C maximum junction temperature rating, MSL level 1 moisture sensitivity, and robust thermal resistance (RθJM = 12–15 °C/W). It meets AEC-Q200 stress test requirements when applied within derated power limits per Figure 2 of the datasheet. Its SlimSMA package also resists mechanical vibration better than larger DO-214 packages, supporting deployment in engine control units and body electronics.
How does the leakage current of SMA6F48A-M3/I affect low-power sensor circuits?
SMA6F48A-M3/I exhibits ≤ 0.2 μA maximum reverse leakage current at its 48 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures negligible loading on high-impedance sensor outputs or battery-backed monitoring circuits-critical for maintaining accuracy in precision analog front-ends or extending battery life in always-on IoT nodes. Leakage remains well below 1 μA even at elevated temperatures, preserving signal integrity without additional buffering.
SMA6F48A-M3/I 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 76.9V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMA6F48A-M3/I FAQ
1.How can I place an order for SMA6F48A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F48A-M3/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 SMA6F48A-M3/I reliable?
The price and inventory of SMA6F48A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F48A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F48A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F48A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F48A-M3/I?
SMA6F48A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F48A-M3/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 SMA6F48A-M3/I?
For technical support, including SMA6F48A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F48A-M3/I requirements.
6.How does Aetrix verify that SMA6F48A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F48A-M3/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 SMA6F48A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F48A-M3/I?
All SMA6F48A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F48A-M3/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 SMA6F48A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F48A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F48A-M3/I Tags
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