My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA6F12AHD-M3/6B
- Part No.:
- SMA6F12AHD-M3/6B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F12AHD-M3/6B.pdf
- Description:
- TVS DIODE 12VWM 22.9VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,119
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F12AHD-M3/6B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 12 V stand-off voltage (VWM), 13.2–14.3 V breakdown voltage (VBR), 18.5 V maximum clamping voltage at 22.9 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 SMA6F12AHD-M3/6B datasheet, SMA6F12AHD-M3/6B pinout, SMA6F12AHD-M3/6B application, or SMA6F12AHD-M3/6B equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low-profile mounting compatibility with automated assembly, thermal derating on FR4 PCB, unidirectional polarity alignment, and MSL Level 1 reflow compliance.
Technical Context
This TVS diode operates as a unidirectional Zener-clamped protector, triggered when reverse voltage exceeds VBR (13.2–14.3 V @ 1 mA). Its dynamic resistance (RD = 0.130 Ω) enables rapid response to transient events while maintaining low clamping voltage (VC = 18.5 V @ IPP = 22.9 A, 10/1000 μs).
Thermal design relies on junction-to-ambient thermal resistance (RθJA = 120–150 °C/W on FR4) and maximum junction temperature of 175 °C. It meets J-STD-020 MSL Level 1 with peak reflow temperature up to 260 °C and supports halogen-free, RoHS-compliant industrial-grade assembly via matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 13.2 V / 14.3 V @ 1 mA - Breakdown threshold range defining turn-on consistency |
| VC @ IPP | 18.5 V @ 22.9 A (10/1000 μs) - Clamped voltage during standard surge, limiting downstream stress |
| PPPM (10/1000 μs) | 600 W - Peak transient energy handling capability under industry-standard waveform |
| ID @ VWM | 0.2 μA max - Reverse leakage ensuring minimal standby power loss and signal integrity |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Robust electrostatic discharge immunity |
| Package | SlimSMA (DO-221AC), 0.95 mm typical height - Enables ultra-thin PCB designs and high-density placement |
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 height. Complies with JEDEC DO-221AC outline and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected line ground or low-side reference; defines unidirectional conduction direction |
| Cathode | Reverse voltage sensing / clamping output | Marked by color band; ties to supply rail or signal line requiring overvoltage protection |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 0.95 mm typical height - Enables use in space-constrained consumer and portable electronics |
| Automated placement optimized | Matte tin-plated leads compliant with J-STD-002 and JESD22-B102 - Ensures reliable solder wetting in SMT lines |
| High-energy clamping | 600 W (10/1000 μs) + 4 kW (8/20 μs) - Handles both lightning-induced surges and inductive switching spikes |
| MSL Level 1 rating | Peak reflow temperature up to 260 °C - Supports lead-free assembly without preconditioning |
| Halogen-free & RoHS | M3 suffix - Meets industrial-grade environmental compliance and JESD201 Class 2 whisker resistance |
Applications
| Industrial Sensor Interface | USB Power Line Protection |
|---|---|
Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors in factory automation systems exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground to clamp transients before they reach precision ADC input stages. Use Value: Limits induced voltage to ≤18.5 V during 22.9 A surges, preserving signal chain accuracy and preventing latch-up in 3.3 V or 5 V sensor ICs. |
Use Scenario: Safeguarding VBUS line in USB 2.0 host ports against hot-plug surges and ESD events during cable insertion. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between USB VBUS and chassis ground, activated only during overvoltage conditions. Use Value: Withstands 15 kV air-gap ESD per IEC 61000-4-2 and clamps 10/1000 μs surges to 18.5 V, protecting USB controller power rails without affecting normal 5 V operation. |
| Automotive Body Control Module | Telecom PoE Injector Port |
Use Scenario: Suppressing load-dump transients on 12 V supply lines feeding microcontrollers and CAN transceivers in BCMs. IC Role / Device Role / Timing Role: Primary unidirectional clamping device on main 12 V rail, positioned upstream of DC/DC converters. Use Value: Delivers 600 W surge handling at 12 V standoff, enabling robust protection without derating due to its 175 °C TJ max and low RθJA on standard PCBs. |
Use Scenario: Guarding Ethernet data pair power delivery (PoE) inputs in midspan injectors against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each powered pair, referenced to isolated ground plane. Use Value: Low clamping voltage (18.5 V) ensures IEEE 802.3af/at PD interface ICs remain within absolute maximum ratings during 8/20 μs surges up to 4 kW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F12A-M3/6B | VBR min/max = 13.3/14.7 V; VC = 18.8 V @ 23.5 A - slightly higher clamping and tighter VBR tolerance | Same package and circuit role; used where tighter VBR distribution is required for margin-critical designs | Select SMA6F12A-M3/6B when tighter breakdown control is needed; SMA6F12AHD-M3/6B offers lower VBR center point for earlier clamping onset. |
| SMAJ12A-M3/61 | Higher PPPM (400 W vs. 600 W); same VWM/VBR range but larger SMA (DO-214AC) package - 2.4 mm height vs. 0.95 mm | Used where board height allows and higher surge margin is prioritized over footprint density | Choose SMAJ12A-M3/61 only if SlimSMA height constraint is relaxed; SMA6F12AHD-M3/6B provides superior space efficiency without sacrificing 600 W rating. |
Compared with SMA6F12A-M3/6B, SMA6F12AHD-M3/6B initiates clamping at a marginally lower VBR (13.2 V min), reducing let-through voltage during fast-rising transients; versus SMAJ12A-M3/61, it delivers identical protection level in 60 % less vertical space, critical for ultra-thin end equipment.
Availability
SMA6F12AHD-M3/6B is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB power line protection, and automotive body control modules requiring stable component supply, consistent M3-grade material compliance, and high-volume tape-and-reel logistics.
Supply support for SMA6F12AHD-M3/6B 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, thermal performance, and application-specific optimization.
The SMA6FxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-efficiency, low-profile transient suppression in space-constrained, high-reliability power and signal line applications across industrial and automotive markets.
FAQ
What is the exact breakdown voltage range for SMA6F12AHD-M3/6B?
The SMA6F12AHD-M3/6B has a guaranteed breakdown voltage (VBR) range of 13.2 V to 14.3 V measured at 1 mA test current and 25 °C ambient. This tighter VBR window compared to the standard SMA6F12A variant reflects its "HD" (High Definition) characterization for improved consistency in surge turn-on behavior.
Does SMA6F12AHD-M3/6B support lead-free reflow soldering?
Yes, SMA6F12AHD-M3/6B is rated for MSL Level 1 per J-STD-020 and qualified for peak reflow temperatures up to 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102, ensuring reliable wetting and joint formation in standard lead-free SMT processes without preconditioning.
How does the clamping voltage of SMA6F12AHD-M3/6B compare under different surge waveforms?
At 22.9 A peak pulse current (10/1000 μs), SMA6F12AHD-M3/6B clamps to 18.5 V. Under the more severe 8/20 μs waveform, it clamps to 22.9 V at 298 A - confirming its 4 kW peak pulse power rating. Both values are measured per standardized test conditions and documented in the Vishay datasheet revision 17-Sep-2021.
Is SMA6F12AHD-M3/6B suitable for bidirectional transient protection?
No, SMA6F12AHD-M3/6B is strictly unidirectional. Its internal structure functions as a Zener-based avalanche diode with cathode-band polarity marking. For bidirectional protection, a separate symmetric TVS such as SMBJ12CA or an explicitly dual-anode/dual-cathode configuration must be used.
What is the thermal resistance of SMA6F12AHD-M3/6B on a standard PCB?
When mounted on a standard FR4 PCB with 2 oz. copper and the recommended footprint, SMA6F12AHD-M3/6B exhibits a typical junction-to-ambient thermal resistance (RθJA) of 120–150 °C/W. This value is critical for calculating safe power derating above 25 °C ambient, as shown in Figure 5 of the Vishay datasheet.
SMA6F12AHD-M3/6B 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):
- 12V
- Voltage - Breakdown (Min):
- 13.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.9V
- Current - Peak Pulse (10/1000µs):
- 157A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F12AHD-M3/6B FAQ
1.How can I place an order for SMA6F12AHD-M3/6B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F12AHD-M3/6B 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 SMA6F12AHD-M3/6B reliable?
The price and inventory of SMA6F12AHD-M3/6B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F12AHD-M3/6B is usually 5 days.
3.What payment methods are accepted for SMA6F12AHD-M3/6B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F12AHD-M3/6B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F12AHD-M3/6B?
SMA6F12AHD-M3/6B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F12AHD-M3/6B 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 SMA6F12AHD-M3/6B?
For technical support, including SMA6F12AHD-M3/6B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F12AHD-M3/6B requirements.
6.How does Aetrix verify that SMA6F12AHD-M3/6B is sourced from the original manufacturer or authorized distributors?
All SMA6F12AHD-M3/6B 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 SMA6F12AHD-M3/6B meets industry standards.
7.What is the process for return or replacement of SMA6F12AHD-M3/6B?
All SMA6F12AHD-M3/6B units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F12AHD-M3/6B, 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 SMA6F12AHD-M3/6B part is unused and in its original packaging.
Return procedure for SMA6F12AHD-M3/6B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F12AHD-M3/6B 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
