My Inquiry
My Account
STMicroelectronics SMA6F12AVCL
- Part No.:
- SMA6F12AVCL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F12AVCL.pdf
- Description:
- TVS DIODE 12VWM 22.9VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:689
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F12AVCL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in SMAflat (DO-221AC) package, designed for high-reliability ESD and surge protection. It features 12 V stand-off voltage, 18.5 V clamping voltage at 1 A (10/1000 µs), 0.2 µA leakage at 25 °C, 175 °C max junction temperature, and 600 W peak pulse power - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMA6F12AVCL datasheet, SMA6F12AVCL pinout, SMA6F12AVCL application, or SMA6F12AVCL equivalent, key selection criteria include clamping voltage margin at 1 A, thermal robustness up to 175 °C, low leakage for battery-backed circuits, and JEDEC-compliant SMAflat footprint compatibility with IPC-7531 layouts.
Technical Context
This TVS diode uses planar junction technology to achieve low dynamic resistance (31 Ω at 10/1000 µs) and stable breakdown behavior across temperature. Its unidirectional configuration supports DC-biased signal and power rail protection where reverse conduction must be blocked.
The device meets IEC 61000-4-2 Level 4 (15 kV air / 8 kV contact discharge) and MIL-STD-883G Class 3B (25 kV HBM), with thermal resistance of 20 °C/W (junction-to-leads) enabling reliable operation under repeated surge stress without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 12 V - maximum continuous reverse operating voltage before breakdown |
| Clamping Voltage | 18.5 V @ 1 A (10/1000 µs) - limits transient voltage seen by protected ICs |
| Peak Pulse Power | 600 W (10/1000 µs) - sustains standard lightning/surge waveforms per IEC 61000-4-5 |
| Leakage Current | 0.2 µA @ 12 V, 25 °C - minimizes standby power loss in battery-critical systems |
| Junction Temp Max | 175 °C - enables placement near hot components (e.g., MOSFETs, transformers) |
| Package | SMAflat (DO-221AC) - JEDEC-registered, non-exposed pad, IPC-7531 compliant footprint |
| ESD Rating | ±15 kV air / ±8 kV contact (IEC 61000-4-2 Level 4) - full system-level ESD immunity |
Pinout & Package
SMA6F12AVCL is housed in an SMAflat (DO-221AC) surface-mount package with cathode-indicating band. The two-terminal device has no internal leads beyond anode and cathode; PCB layout follows JEDEC outline with 4.8–5.6 mm body length and 2.25–2.95 mm width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected line's lower-potential side (e.g., GND or return path) |
| Cathode | Current entry during reverse breakdown | Connected to protected line's higher-potential side (e.g., +12 V rail or signal line) |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 18.5 V @ 1 A ensures ≥3.5 V safety margin for 15 V logic rails |
| High junction temperature rating | 175 °C operation allows placement adjacent to power semiconductors without derating |
| Ultra-low leakage | 0.2 µA @ 25 °C reduces quiescent current in always-on sensor nodes |
| JEDEC-compliant SMAflat | Standardized footprint enables drop-in replacement and automated assembly |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements for industrial and automotive end equipment |
Applications
| Industrial SMPS Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 12 V input rails of switch-mode power supplies against load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground. Use Value: Clamps surges to ≤18.5 V, preserving downstream regulators and controllers rated for 20 V absolute max. | Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from ESD events during vehicle assembly and service. IC Role / Device Role / Timing Role: Point-of-entry ESD suppressor on LIN data line and VBAT supply pins. Use Value: Withstands 15 kV air discharge per IEC 61000-4-2, preventing latch-up or gate oxide damage in 5 V tolerant peripherals. |
| Medical Patient Monitor Front-End | Telecom PoE Interface Protection |
Use Scenario: Shielding analog sensor inputs (e.g., ECG, SpO₂) from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage TVS on signal lines upstream of instrumentation amplifiers. Use Value: 0.2 µA leakage avoids DC offset errors in high-gain, low-noise front-ends. | Use Scenario: Protecting Power over Ethernet (PoE) data pairs and power feeders from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable protection via paired unidirectional devices on differential pairs. Use Value: 600 W pulse rating handles 10/1000 µs surges defined in IEEE 802.3af/at, maintaining link integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F12A-TR | Same electrical specs but marked SUJ vs. no suffix; identical clamping (18.5 V), leakage (0.2 µA), and package | No functional difference; both meet IEC 61000-4-2 Level 4 and operate to 175 °C | Select SMA6F12A-TR for tape-and-reel delivery; SMA6F12AVCL is same device with alternate marking convention |
| SMAJ12A | Higher clamping voltage (23.2 V @ 1 A), larger DO-214AC package, 400 W rating (vs. 600 W) | Less margin for 15 V systems; requires larger PCB area; lower surge endurance | Use only if SMA6F12AVCL is unavailable and design tolerates 4.7 V higher clamping |
Compared with SMA6F12A-TR, SMA6F12AVCL offers identical protection performance with equivalent marking flexibility; versus SMAJ12A, it delivers 4.7 V lower clamping and 50 % higher surge power in a smaller footprint - critical for space-constrained, high-reliability designs.
Availability
SMA6F12AVCL is available at Aetrix Electronics and suitable for industrial SMPS input protection, automotive body control modules, medical patient monitor front-ends, and telecom PoE interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SMA6F12AVCL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and protection components for industrial, automotive, and consumer markets.
The SMA6F series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-temperature, low-leakage surge protection in next-generation power conversion and harsh-environment electronics.
FAQ
What is the polarity configuration of SMA6F12AVCL?
SMA6F12AVCL is a unidirectional TVS diode with cathode indicated by a band on the SMAflat package. It conducts only when the cathode is at higher potential than the anode - ideal for protecting DC rails where reverse conduction must be blocked. Its VI curve matches a standard silicon rectifier in forward bias and clamps in reverse breakdown above 12 V.
Does SMA6F12AVCL require external heat sinking?
No external heatsink is required. With a junction-to-leads thermal resistance of 20 °C/W and 6 W steady-state power dissipation capability, SMA6F12AVCL relies on PCB copper pour under its leads for thermal management. Standard FR4 layouts with ≥1 cm² copper per lead maintain safe junction temperatures even under repetitive 1 A surges.
How does the 175 °C junction rating impact board placement?
The 175 °C maximum junction temperature allows SMA6F12AVCL to be placed within 5 mm of MOSFETs, transformers, or other heat-generating components without derating. This eliminates need for thermal isolation zones and supports compact, high-density layouts in industrial and automotive power stages where ambient temperatures exceed 125 °C.
Is SMA6F12AVCL compatible with lead-free reflow processes?
Yes. SMA6F12AVCL's SMAflat package is qualified for lead-free soldering per JEDEC J-STD-020, with a maximum lead temperature of 260 °C for 10 seconds. Its UL94V-0 epoxy housing and solder-plated terminals ensure reliable wetting and intermetallic formation during standard Pb-free reflow profiles (peak 260 °C, 60–90 sec above 217 °C).
SMA6F12AVCL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F, TRANSIL™
- 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:
- 600W
- 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:
- SMAflat
SMA6F12AVCL FAQ
1.How can I place an order for SMA6F12AVCL through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F12AVCL 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 SMA6F12AVCL reliable?
The price and inventory of SMA6F12AVCL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F12AVCL is usually 5 days.
3.What payment methods are accepted for SMA6F12AVCL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F12AVCL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F12AVCL?
SMA6F12AVCL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F12AVCL 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 SMA6F12AVCL?
For technical support, including SMA6F12AVCL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F12AVCL requirements.
6.How does Aetrix verify that SMA6F12AVCL is sourced from the original manufacturer or authorized distributors?
All SMA6F12AVCL 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 SMA6F12AVCL meets industry standards.
7.What is the process for return or replacement of SMA6F12AVCL?
All SMA6F12AVCL units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F12AVCL, 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 SMA6F12AVCL part is unused and in its original packaging.
Return procedure for SMA6F12AVCL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F12AVCL 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…
