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Vishay General Semiconductor - Diodes Division SMA6F51A-M3/H
- Part No.:
- SMA6F51A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F51A-M3/H.pdf
- Description:
- 600W,51V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,132
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Product details
Overview
SMA6F51A-M3/H 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 51 V stand-off voltage (VWM), 6.4–7.07 V breakdown voltage at 10 mA, 82.2 V maximum clamping voltage at 7.3 A (10/1000 μs), 600 W peak pulse power, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F51A-M3/H datasheet, SMA6F51A-M3/H pinout, SMA6F51A-M3/H application, or SMA6F51A-M3/H equivalent, this device supports robust overvoltage protection in space-constrained consumer, industrial, and telecom systems where low-profile mounting and high surge immunity are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device with Zener-based avalanche breakdown behavior. Its electrical response is defined by precise VBR (56.7–62.7 V at IT = 1 mA), VC ≤ 82.2 V at IPP = 7.3 A (10/1000 μs), and dynamic resistance RD = 2.67 Ω - enabling predictable voltage limiting during transient events.
Thermal performance is characterized by RθJA = 120–150 °C/W (FR4 PCB, 2 oz.), TJ max = 175 °C, and PD = 8 W at TM = 55 °C. The M3 suffix confirms halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 56.7 V / 62.7 V at 1 mA - ensures reliable turn-on within tight tolerance band for consistent clamping threshold |
| VC @ IPP | 82.2 V at 7.3 A (10/1000 μs) - defines worst-case voltage seen by protected circuit during standard surge event |
| PPPM | 600 W (10/1000 μs) - sustains high-energy transients without failure under JEDEC-standard waveform |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - meets stringent system-level electrostatic discharge immunity requirements |
| Package | SlimSMA (DO-221AC) - 0.95 mm typical height enables ultra-low-profile PCB layout in dense designs |
| TJ max | 175 °C - supports operation in high-temperature industrial environments without derating penalties |
Pinout & Package
SlimSMA (DO-221AC) package with cathode-indicating band; anode and cathode terminals mounted on opposite ends of molded body; optimized for automated placement and reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; forms return path during clamping |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to higher-potential side (e.g., VCC rail); carries full surge current to ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile height | 0.95 mm typical - enables use in slim handheld and portable electronics with strict Z-axis constraints |
| High surge capability | 4 kW (8/20 μs) - handles lightning-induced surges and inductive switching spikes common in industrial power rails |
| MSL Level 1 rating | Peak reflow temperature up to 260 °C - eliminates moisture sensitivity concerns and pre-bake requirements |
| Halogen-free & RoHS | M3 suffix compliance - satisfies environmental regulations and end-product sustainability mandates |
| ESD-hardened terminals | 15 kV air / 8 kV contact - protects downstream ICs from human-body-model ESD events without external shielding |
Applications
| Industrial Motor Control | Automotive Infotainment Power Rails |
|---|---|
Use Scenario: Protection of microcontroller supply inputs against back-EMF from relay coils and solenoid drivers in PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going transients on 5 V or 12 V rails to prevent latch-up or damage to logic ICs. Use Value: With 82.2 V clamping at 7.3 A and 175 °C junction rating, SMA6F51A-M3/H maintains reliability across wide ambient temperature ranges and repeated surge events. | Use Scenario: Input protection for USB-C power delivery circuits and display interface power supplies in head units. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs load-dump and jump-start transients while preserving low-leakage operation below 51 V. Use Value: SlimSMA footprint allows placement near connectors without increasing board area; M3 finish ensures long-term solder joint integrity in automotive thermal cycling. |
| Telecom Base Station DC Feeds | Consumer IoT Sensor Nodes |
Use Scenario: Surge suppression on -48 V DC input lines exposed to lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Reverse-biased clamping element limits voltage excursions to safe levels during 8/20 μs surges up to 4 kW. Use Value: 4 kW (8/20 μs) rating and DO-221AC thermal resistance (RθJM = 12–15 °C/W) enable effective energy dissipation without thermal runaway. | Use Scenario: ESD protection for I²C and UART signal lines connecting environmental sensors to MCU in battery-powered smart home devices. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS shunts ESD pulses away from sensitive analog front-end inputs. Use Value: IEC 61000-4-2 Level 4 compliance (8 kV contact) ensures immunity to handling-related discharges without degrading signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F51A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel vs. 3,500 pcs/reel) | No functional difference; suited for high-volume SMT production requiring larger reels | Select based on assembly line reel capacity and procurement lot sizing |
| SMA6F51AHE3_A/H | Identical VWM/VBR/VC ratings; same SlimSMA package; differs in halogen-free compliance documentation and traceability level | Targeted at automotive OEMs requiring AEC-Q200-aligned documentation and extended lot traceability | Choose when full PPAP support and enhanced material declarations are required |
Compared with SMA6F51A-M3/H, SMA6F51A-M3/6B offers identical protection performance but scales packaging volume, while SMA6F51AHE3_A/H adds automotive-grade documentation rigor without altering electrical behavior - enabling selection based on manufacturing scale or compliance scope rather than circuit function.
Availability
SMA6F51A-M3/H is available at Aetrix Electronics and suitable for industrial motor control, telecom DC feeds, and consumer IoT sensor nodes requiring stable component supply, consistent M3-compliant materials, and SlimSMA footprint compatibility.
Supply support for SMA6F51A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMA6F series is part of Vishay's TRANSZORB® TVS family, engineered for high-energy transient suppression in space-constrained surface-mount applications across consumer, industrial, and telecom markets.
FAQ
What is the clamping voltage of SMA6F51A-M3/H under a 10/1000 μs surge?
The SMA6F51A-M3/H has a maximum clamping voltage (VC) of 82.2 V at 7.3 A under the 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during such transients. The SMA6F51A-M3/H achieves this clamping performance using its specified dynamic resistance of 2.67 Ω and breakdown voltage range of 56.7–62.7 V.
Is SMA6F51A-M3/H suitable for bidirectional transient protection?
No, SMA6F51A-M3/H is a unidirectional TVS diode and is not rated for bidirectional operation. Its design supports clamping only in the reverse direction (cathode-to-anode), with forward conduction behaving like a standard silicon diode (~0.85 V VF). For bidirectional protection, a dedicated symmetric TVS such as SMBJ51CA or equivalent must be used instead of SMA6F51A-M3/H.
Does SMA6F51A-M3/H meet automotive qualification standards?
The SMA6F51A-M3/H is not AEC-Q200 qualified. While it operates reliably from –55 °C to +175 °C and meets IEC 61000-4-2 Level 4 ESD, it lacks the stress testing, lot traceability, and documentation required for automotive-grade certification. For automotive applications, consider the SMA6F51AHE3_A/H variant, which provides aligned documentation and traceability - though both share identical electrical specs and SlimSMA packaging.
What is the thermal resistance of SMA6F51A-M3/H on a standard FR4 PCB?
The typical junction-to-ambient thermal resistance (RθJA) of SMA6F51A-M3/H is 120–150 °C/W when mounted on an FR4 PCB with 2 oz. copper and standard footprint per JEDEC 51-2A. This value directly impacts power derating: at 55 °C case temperature, the device supports 8 W continuous dissipation, dropping to ~1.0 W at 25 °C ambient if no heatsinking is applied.
How does the M3 suffix affect the construction of SMA6F51A-M3/H?
The M3 suffix on SMA6F51A-M3/H indicates halogen-free, RoHS-compliant molding compound and matte tin-plated leads that pass JESD201 Class 2 whisker testing. It also confirms compliance with Vishay's material categorization per doc#99912. These attributes ensure environmental safety, long-term solder joint reliability, and suitability for industrial and consumer applications with strict chemical content requirements - all without altering the SMA6F51A-M3/H's electrical performance.
SMA6F51A-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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.2V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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)
SMA6F51A-M3/H FAQ
1.How can I place an order for SMA6F51A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F51A-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 SMA6F51A-M3/H reliable?
The price and inventory of SMA6F51A-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 SMA6F51A-M3/H is usually 5 days.
3.What payment methods are accepted for SMA6F51A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F51A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F51A-M3/H?
SMA6F51A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F51A-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 SMA6F51A-M3/H?
For technical support, including SMA6F51A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F51A-M3/H requirements.
6.How does Aetrix verify that SMA6F51A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F51A-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 SMA6F51A-M3/H meets industry standards.
7.What is the process for return or replacement of SMA6F51A-M3/H?
All SMA6F51A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F51A-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 SMA6F51A-M3/H part is unused and in its original packaging.
Return procedure for SMA6F51A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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