My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA6F51A-M3/I
- Part No.:
- SMA6F51A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F51A-M3/I.pdf
- Description:
- 600W,51V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,716
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F51A-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 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR), 82.2 V maximum clamping voltage at 10/1000 μs pulse, 600 W peak pulse power rating, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact). It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMA6F51A-M3/I datasheet, SMA6F51A-M3/I pinout, SMA6F51A-M3/I application, or SMA6F51A-M3/I equivalent, key selection criteria include clamping voltage at rated surge current, unidirectional polarity, SlimSMA footprint compatibility, thermal resistance (RθJA = 120–150 °C/W), and M3 halogen-free RoHS-compliant construction.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protector with avalanche breakdown behavior. Its unidirectional configuration allows forward conduction only in one direction, making it suitable for DC-biased lines where reverse leakage must be minimized below 0.2 μA at 51 V.
The device uses silicon planar junction technology with low dynamic resistance (RD = 2.67 Ω) to achieve fast response (< 1 ns) and precise clamping. Thermal performance is defined for mounting on FR4 PCB (2 oz. copper) with derating above 25 °C ambient per JEDEC 51-2A, and junction temperature range spans −55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 56.7 V / 62.7 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 82.2 V at 10/1000 μs - Clamping voltage limits downstream component stress during 600 W transient |
| ID @ VWM | ≤ 0.2 μA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| PPPM (10×1000 μs) | 600 W - Sustains high-energy surges common in industrial power line switching |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Meets stringent end-equipment immunity requirements |
| Package | SlimSMA (DO-221AC) - 0.95 mm profile enables ultra-thin PCB designs and automated placement |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, unidirectional, cathode indicated by color band. Dimensions: 4.15 × 2.50 × 0.95 mm (L × W × H), matte tin-plated leads, MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge current sink path | Connected to protected line's lower-potential side (e.g., GND or return path) during transient |
| Cathode | Avalanche breakdown terminal / Clamping reference | Connected to protected line's higher-potential side (e.g., VCC or signal rail); color band marks this end |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 0.95 mm height enables use in space-constrained portable and telecom modules |
| Automated placement compatibility | Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 reliability standards |
| High-energy clamping | 600 W (10/1000 μs) and 4 kW (8/20 μs) ratings support both lightning and inductive-switching surge protection |
| Halogen-free & RoHS | M3 suffix confirms industrial-grade, lead-free, halogen-free construction per JEDEC JESD201 Class 2 whisker test |
| Wide operating temperature | −55 °C to +175 °C junction range supports under-hood automotive and industrial control environments |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense lines against inductive kickback from relay and solenoid switching. IC Role / Device Role: Unidirectional TVS placed between MOSFET gate and source to clamp negative-going transients and prevent gate oxide rupture. Use Value: 82.2 V clamping at 10/1000 μs ensures gate-source voltage stays within ±20 V absolute max rating of standard logic-level MOSFETs. | Use Scenario: Input-stage surge suppression on 48 V DC telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role: Primary clamping element across input rails, coordinated with upstream MOVs and downstream filtering. Use Value: 600 W peak pulse power handles 10/1000 μs surges up to 7.3 A while maintaining < 0.2 μA leakage at nominal 48 V operation. |
| Automotive Body Control Modules | IoT Sensor Signal Lines |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients. IC Role / Device Role: Unidirectional TVS on each LIN signal line (e.g., LIN_BUS), referenced to vehicle ground. Use Value: 51 V VWM aligns with 12 V system nominal + 100 % tolerance; 175 °C TJ max supports under-dash mounting near HVAC units. | Use Scenario: ESD hardening of analog sensor outputs (e.g., temperature, humidity) connected to MCU ADC inputs. IC Role / Device Role: Low-capacitance TVS placed directly at connector interface to shunt human-body-model discharges before reaching sensitive front-end circuitry. Use Value: IEC 61000-4-2 Level 4 compliance (8 kV contact) ensures robustness against field-service ESD events without signal distortion. |
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-M3/5 | Different tape-and-reel packaging (7" reel, 3500 pcs); identical electrical specs and SlimSMA package | No functional difference; selected when smaller reel quantity or different logistics requirement applies | Choose SMA6F51A-M3/5 for prototyping or low-volume production where 3500-unit reels are preferred. |
| SMAJ51A-M3/5 | Same VWM/VBR/VC specs but in larger SMA (DO-214AC) package (2.4 mm height); RθJA ≈ 85 °C/W vs. 120–150 °C/W | Higher thermal mass and lower thermal resistance suit higher average power dissipation; less suitable for ultra-thin designs | Choose SMAJ51A-M3/5 when board layout allows taller profile and improved thermal performance is prioritized over height constraint. |
Compared with SMA6F51A-M3/I, SMA6F51A-M3/5 offers identical protection performance in identical SlimSMA packaging but with smaller reel quantity, while SMAJ51A-M3/5 trades 0.95 mm height for better thermal handling in a legacy SMA footprint-making the former ideal for volume logistics alignment and the latter for thermally demanding deployments.
Availability
SMA6F51A-M3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and M3-compliant material sourcing.
Supply support for SMA6F51A-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMA6F series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy, surface-mount transient suppression in space-constrained industrial, telecom, and automotive systems where low-profile, high-clamping-accuracy protection is critical.
FAQ
What is the maximum clamping voltage of the SMA6F51A-M3/I under a 10/1000 μs surge?
The SMA6F51A-M3/I has a maximum clamping voltage (VC) of 82.2 V when subjected to its rated peak pulse current under the 10/1000 μs waveform. This value is measured at the specified IPPM and ensures downstream components remain within safe voltage limits during standardized surge events. The SMA6F51A-M3/I achieves this clamping performance using a low dynamic resistance of 2.67 Ω and tightly controlled breakdown characteristics.
Is the SMA6F51A-M3/I suitable for bidirectional transient protection?
No, the SMA6F51A-M3/I is a unidirectional TVS diode and is not suitable for bidirectional protection. Its electrical structure supports avalanche breakdown only in reverse bias; forward conduction follows standard diode behavior. For AC or bipolar signal line protection, a dedicated bidirectional variant such as SMA6F51CA-M3/I-or a back-to-back unidirectional pair-must be used. The SMA6F51A-M3/I data sheet explicitly states "Unidirectional only" in its FEATURES section.
Does the SMA6F51A-M3/I meet automotive AEC-Q200 stress test requirements?
The SMA6F51A-M3/I is not AEC-Q200 qualified. While it operates across −55 °C to +175 °C junction temperature and meets industrial reliability standards (e.g., MSL Level 1, JESD201 Class 2 whisker test), Vishay does not list AEC-Q200 qualification for the SMA6F51A-M3/I in its official documentation or product briefs. For automotive-critical applications, designers should verify qualification status directly with Vishay or select an AEC-Q200–rated alternative such as the Automotive Grade SMA6F51AHE3/54.
What is the thermal resistance junction-to-ambient (RθJA) for the SMA6F51A-M3/I on a standard PCB?
The SMA6F51A-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and a maximum of 150 °C/W when mounted on a standard FR4 PCB with 2 oz. copper, per JEDEC 51-2A. This value assumes the recommended SlimSMA pad layout and no additional heatsinking. At 55 °C ambient, the device supports 8 W power dissipation; derating applies linearly above that temperature, as shown in Figure 5 of the datasheet.
How does the M3 suffix affect the material composition of the SMA6F51A-M3/I?
The M3 suffix on the SMA6F51A-M3/I indicates halogen-free, RoHS-compliant, and industrial-grade construction. Specifically, it certifies compliance with JEDEC JESD201 Class 2 whisker testing, UL 94 V-0 flammability rating for the molding compound, and restriction of hazardous substances per EU RoHS Directive 2011/65/EU. The terminals are matte tin plated and solderable per J-STD-002, ensuring long-term interconnect reliability in high-volume manufacturing. The SMA6F51A-M3/I meets all these requirements without performance trade-offs.
SMA6F51A-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):
- 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/I FAQ
1.How can I place an order for SMA6F51A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F51A-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 SMA6F51A-M3/I reliable?
The price and inventory of SMA6F51A-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 SMA6F51A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F51A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F51A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F51A-M3/I?
SMA6F51A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F51A-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 SMA6F51A-M3/I?
For technical support, including SMA6F51A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F51A-M3/I requirements.
6.How does Aetrix verify that SMA6F51A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F51A-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 SMA6F51A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F51A-M3/I?
All SMA6F51A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F51A-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 SMA6F51A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F51A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F51A-M3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
