My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA6F43A-M3/I
- Part No.:
- SMA6F43A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F43A-M3/I.pdf
- Description:
- 600W,43V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,456
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F43A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in SlimSMA (DO-221AC) package, designed to protect sensitive electronics against inductive switching transients and ESD events. It features 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), 69.8 V max clamping voltage (VC) at 8.6 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 SMA6F43A-M3/I datasheet, SMA6F43A-M3/I pinout, SMA6F43A-M3/I application, or SMA6F43A-M3/I equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines where low-profile mounting, high surge capability, and industrial-grade reliability are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM = 43 V, then avalanches sharply at VBR (min 47.8 V), limiting transient energy with dynamic resistance RD = 1.98 Ω and clamping to ≤69.8 V at 8.6 A (10/1000 μs). Its thermal design supports continuous operation up to TJ = 175 °C and derates linearly above 25 °C ambient.
The SlimSMA (DO-221AC) package enables automated placement with 0.95 mm typical height, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and MSL Level 1 moisture sensitivity per J-STD-020 at 260 °C peak reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Voltage range at which avalanche breakdown initiates reliably |
| VC @ IPP | 69.8 V at 8.6 A (10/1000 μs) - Clamped voltage during standard surge event; defines protected circuit stress level |
| PPPM | 600 W (10/1000 μs) - Peak transient power handling capacity under standardized waveform |
| IPP (10/1000 μs) | 8.6 A - Maximum non-repetitive surge current the device can safely clamp without failure |
| RD | 1.98 Ω - Dynamic resistance determining voltage rise per amp of surge current beyond VBR |
| TJ max | 175 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.15–4.35 mm length × 2.50–2.70 mm width × 0.95 mm typical height. RoHS-compliant, halogen-free, M3 suffix meets JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during transient |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., +VIN, signal); color band identifies polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 0.95 mm typical height enables use in space-constrained consumer and portable electronics |
| IEC 61000-4-2 Level 4 ESD protection | Withstands 15 kV air discharge and 8 kV contact discharge without degradation |
| Peak pulse power rating | 600 W (10/1000 μs) and 4 kW (8/20 μs) supports robust protection against lightning-induced surges |
| MSL Level 1 reliability | Rated for reflow up to 260 °C peak, eliminating bake-out requirements for high-volume SMT assembly |
| Industrial-grade construction | M3 suffix ensures whisker-resistant matte tin plating and compliance with JESD201 Class 2 |
Applications
| Power Rail Protection | Automotive Sensor Interface |
|---|---|
Use Scenario: Protecting 48 V DC input rails in industrial PLC modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between rail and ground, activated within nanoseconds upon overvoltage detection. Use Value: Limits rail voltage to ≤69.8 V during 8.6 A surges, preventing damage to downstream DC-DC controllers and microcontrollers. | Use Scenario: Safeguarding LIN bus and analog sensor outputs (e.g., pressure, temperature) in automotive body control modules. IC Role / Device Role / Timing Role: Unidirectional clamping element on signal lines referenced to chassis ground, absorbing ESD and coupled noise. Use Value: Maintains signal integrity by suppressing transients up to 4 kW (8/20 μs) while adding <1 pF capacitance at 0 V bias. |
| Telecom Power Supply Input | Consumer USB-C Port Protection |
Use Scenario: Front-end protection of AC/DC adapter secondary-side 24–48 V outputs in telecom base station power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on regulated output, coordinated with upstream fuses and current limiters. Use Value: Withstands repeated 600 W surges without parameter shift, ensuring long-term reliability in harsh electrical environments. | Use Scenario: Reverse-polarity and ESD protection on VBUS lines of USB-C receptacles in laptops and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp positive transients while blocking reverse current. Use Value: Meets USB-IF ESD requirements with 8 kV contact discharge tolerance and minimal leakage (<0.2 μA at 43 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F43A-M3/H | Identical electrical specs; differs only in tape-and-reel packaging (3500 pcs/reel vs. 14000 pcs/reel for /I) | Same functional role; suited for lower-volume prototyping or small-batch production | Select /H when smaller reel quantities align with assembly planning and inventory turnover goals |
| SMAJ43A-M3/5B | Higher RθJA (160 °C/W vs. 120–150 °C/W), lower PPPM (400 W vs. 600 W), same VWM/VBR range | Less effective in high-power surge scenarios; suitable only where 400 W rating suffices | Choose SMAJ43A-M3/5B only if thermal margin allows and cost sensitivity outweighs surge headroom needs |
Compared with SMA6F43A-M3/I, the /H variant offers identical protection performance in smaller reels, while SMAJ43A-M3/5B trades 33 % lower peak power handling for legacy package compatibility-making the /I version optimal for new designs demanding maximum surge resilience in minimal footprint.
Availability
SMA6F43A-M3/I is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, telecom infrastructure, and consumer power delivery systems requiring stable component supply and long-term manufacturability.
Supply support for SMA6F43A-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 SMA6F series is engineered for high-energy transient suppression in compact surface-mount formats, targeting design-in across automotive, industrial, and communications equipment where space, surge margin, and process compatibility are critical.
FAQ
What is the clamping voltage of the SMA6F43A-M3/I under a 10/1000 μs surge?
The SMA6F43A-M3/I has a maximum clamping voltage (VC) of 69.8 V when subjected to an 8.6 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet and defines the upper voltage limit imposed on the protected circuit during such transients. The SMA6F43A-M3/I achieves this clamping performance with a dynamic resistance of 1.98 Ω, ensuring predictable voltage rise across its operating current range.
Is the SMA6F43A-M3/I suitable for bidirectional signal line protection?
No, the SMA6F43A-M3/I is a unidirectional TVS diode and must not be used on AC-coupled or bidirectional signal paths without external biasing. Its design assumes a fixed polarity: cathode connects to the protected line, anode to ground. For bidirectional protection, a dedicated symmetric TVS like SMBJ43CA or equivalent is required. The SMA6F43A-M3/I datasheet explicitly states "Unidirectional only" in its FEATURES section.
What is the maximum operating junction temperature for the SMA6F43A-M3/I?
The SMA6F43A-M3/I has a maximum operating junction temperature (TJ) of 175 °C, as specified in the PRIMARY CHARACTERISTICS table. This rating allows reliable operation in high-ambient environments such as engine compartments, industrial motor drives, and enclosed power supplies. Derating curves in Figure 2 confirm usable power dissipation down to zero at 175 °C ambient when mounted on infinite heatsink.
Does the SMA6F43A-M3/I meet automotive AEC-Q200 requirements?
No, the SMA6F43A-M3/I is not AEC-Q200 qualified. It is rated as industrial grade per its M3 suffix and documentation, with qualification focused on JESD201 whisker resistance and J-STD-020 MSL Level 1. For automotive applications requiring AEC-Q200 compliance, Vishay offers the Automotive Grade SMA6F43AHE3/5B or equivalent qualified variants-not the standard SMA6F43A-M3/I.
What is the reverse leakage current of the SMA6F43A-M3/I at its stand-off voltage?
The SMA6F43A-M3/I exhibits a maximum reverse leakage current (ID) of 0.2 μA at its stand-off voltage (VWM) of 43 V, measured at 25 °C. This ultra-low leakage ensures minimal power loss and no measurable impact on battery-powered or high-impedance sensing circuits. The value is confirmed in the ELECTRICAL CHARACTERISTICS table under the "MAXIMUM REVERSE LEAKAGE ID AT VWM" column for the SMA6F43A row.
SMA6F43A-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.8V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
SMA6F43A-M3/I FAQ
1.How can I place an order for SMA6F43A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F43A-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 SMA6F43A-M3/I reliable?
The price and inventory of SMA6F43A-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 SMA6F43A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F43A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F43A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F43A-M3/I?
SMA6F43A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F43A-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 SMA6F43A-M3/I?
For technical support, including SMA6F43A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F43A-M3/I requirements.
6.How does Aetrix verify that SMA6F43A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F43A-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 SMA6F43A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F43A-M3/I?
All SMA6F43A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F43A-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 SMA6F43A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F43A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F43A-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 …
