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Vishay General Semiconductor - Diodes Division VTVS12ASMF-M3-08
- Part No.:
- VTVS12ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS12ASMF-M3-08.pdf
- Description:
- TVS DIODE 12.4VWM 20.1VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:28,311
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Product details
Overview
VTVS12ASMF-M3-08 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection of low-voltage DC lines. It features a 12.4 V maximum stand-off voltage (VRWM), 14.0–15.4 V reverse breakdown voltage (VBR) at 1 mA, and clamps to 20.1 V at 19.01 A peak pulse current (10/1000 μs), with ±5 % VBR tolerance and 807 pF typical capacitance at 0 V.
For engineers reviewing the VTVS12ASMF-M3-08 datasheet, VTVS12ASMF-M3-08 pinout, VTVS12ASMF-M3-08 application, or VTVS12ASMF-M3-08 equivalent, key selection criteria include its 175 °C junction temperature rating, IEC 61000-4-2 ±30 kV contact/air discharge compliance, low-profile SOD-123W-compatible footprint, and suitability for automotive infotainment power rails, USB 2.0 data lines, and industrial sensor interfaces requiring robust overvoltage immunity.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 14.0–15.4 V breakdown range. Its 20.1 V clamping voltage at 19.01 A ensures downstream ICs see limited overvoltage during 10/1000 μs transients, while its 807 pF capacitance supports signal integrity on moderate-speed lines like RS-485 or CAN FD.
The device uses "Low-Noise" fast-response technology with sub-nanosecond turn-on, enabling effective suppression of ESD events per IEC 61000-4-2. Its DO-219AB package provides thermal resistance of 20 K/W to leads and supports wave/reflow soldering per J-STD-020 MSL level 1, with peak reflow temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; sustains high-energy surges without failure) |
| Stand-off Voltage (VRWM) | 12.4 V max (maximum continuous reverse voltage before leakage exceeds 0.05 μA) |
| Breakdown Voltage (VBR) | 14.0–15.4 V at IT = 1 mA (±5 % tolerance; defines precise conduction onset) |
| Clamping Voltage (VC) | 20.1 V at IPPM = 19.01 A (limits voltage seen by protected circuit during surge) |
| Capacitance (CD) | 807 pF at VR = 0 V, f = 1 MHz (compatible with <10 Mbps data lines; avoids signal distortion) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2; eliminates need for external ESD stages) |
| Junction Temp Range | −55 °C to +175 °C (supports under-hood automotive and industrial ambient conditions) |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint; dimensions 3.9 × 1.9 × 1.08 mm (L × W × H); cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or lower-potential rail; enables forward-biased conduction only during positive transients on cathode side |
| Cathode | Protected line input | Connected to signal/power line requiring protection; conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles high-energy lightning-induced surges (IEC 61000-4-5 Level 3) without degradation |
| ±5 % VBR tolerance | Ensures tight clamping threshold control across production lots for predictable protection margins |
| Low-profile SMF package | Enables placement near connectors or IC pins with minimal PCB area (3.9 mm × 1.9 mm footprint) |
| IEC 61000-4-2 ±30 kV ESD rating | Eliminates need for cascaded ESD protection in consumer and automotive USB/HDMI interfaces |
| AEC-Q101 qualified option available | Validated for automotive applications including infotainment power supplies and body control modules |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Data Line |
|---|---|
Use Scenario: Protecting 12 V supply inputs to head unit MCUs and audio amplifiers against load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between power rail and ground, activated within nanoseconds of overvoltage onset. Use Value: Limits rail voltage to ≤20.1 V during 19 A surges, preventing latch-up or permanent damage to 12 V-rated silicon. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to cable-induced surges and ESD. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (used in unidirectional configuration) shunting transients on A/B differential lines to ground. Use Value: 807 pF capacitance preserves signal edge integrity at 10 Mbps, while ±30 kV ESD rating meets EN 61000-6-2 immunity requirements. |
| USB 2.0 Host Port Protection | Smart Sensor Node Power Input |
Use Scenario: Shielding USB 2.0 VBUS and D+/D− lines in docking stations from hot-plug ESD and connector arcing. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed on VBUS line with cathode to rail, conducting only above 12.4 V. Use Value: Clamps 15 kV ESD events to <20.1 V in <1 ns, preventing damage to USB PHY and maintaining enumeration reliability. |
Use Scenario: Securing 3.3–12 V power inputs of battery-powered IoT sensors deployed in electrically noisy HVAC ducts or motor enclosures. IC Role / Device Role / Timing Role: Primary overvoltage guard on main supply path, coordinated with upstream fuse and downstream LDO. Use Value: −55 °C to +175 °C operating range ensures functionality in extreme environments; halogen-free molding compound meets RoHS and JEDEC MSL level 1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | Same 12 V VRWM, but 400 W power in SMA package (DO-214AC); 22.5 V VC at 17.3 A; 1000 pF capacitance | Larger footprint (4.5 × 2.7 mm) limits use in space-constrained layouts; higher capacitance reduces suitability for >5 Mbps signals | Select when legacy SMA layout exists or higher thermal mass is needed; avoid for USB 2.0 or high-density boards |
| SMF12A | Identical SMF package and 12 V VRWM, but 200 W PPPM rating; 23.2 V VC at 8.6 A; same 807 pF | Lower surge handling capacity makes it unsuitable for IEC 61000-4-5 Level 3 or automotive load dump | Choose only for cost-sensitive, low-risk applications like consumer remote controls where 400 W margin is unnecessary |
Compared with SMAJ12A-E3/57T and SMF12A, VTVS12ASMF-M3-08 delivers superior surge robustness in the smallest footprint, enabling compact, high-reliability protection for automotive and industrial designs where board space and transient severity are critical constraints.
Availability
VTVS12ASMF-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, USB 2.0 host ports, and smart sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for VTVS12ASMF-M3-08 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The TransZorb® eSMP® Series-including VTVS12ASMF-M3-08-is engineered for high-power transient suppression in space-constrained, thermally demanding applications, with emphasis on AEC-Q101 qualification and IEC/ISO compliance.
FAQ
What is the maximum clamping voltage of the VTVS12ASMF-M3-08 under standard test conditions?
The VTVS12ASMF-M3-08 exhibits a maximum reverse clamping voltage (VC) of 20.1 V when subjected to its rated peak pulse current of 19.01 A using a 10/1000 μs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuits during surge events, ensuring compatibility with 12 V nominal systems and downstream ICs rated for ≤24 V absolute maximum.
Is the VTVS12ASMF-M3-08 suitable for automotive applications requiring AEC-Q101 qualification?
The VTVS12ASMF-M3-08 itself is not AEC-Q101 qualified; however, Vishay offers AEC-Q101-qualified variants in the same family (e.g., VTVS12ASMFM3-08 with suffix 'M' indicating automotive grade). Engineers must verify ordering code suffixes and consult Vishay's official automotive qualification documentation to confirm compliance for specific vehicle subsystems.
How does the 807 pF capacitance of the VTVS12ASMF-M3-08 affect high-speed signal lines?
The 807 pF typical capacitance of the VTVS12ASMF-M3-08 is measured at 0 V bias and 1 MHz; it decreases significantly at operating reverse voltages near VRWM. For USB 2.0 (480 Mbps), this capacitance introduces negligible rise-time degradation when placed on VBUS, but is generally avoided on D+/D− differential pairs-where lower-capacitance TVS arrays would be preferred.
What is the thermal resistance and maximum junction temperature specification for the VTVS12ASMF-M3-08?
The VTVS12ASMF-M3-08 has a thermal resistance (RthJL) of 20 K/W from junction to lead when mounted on an infinite heat sink, and a maximum junction temperature (TJ) rating of +175 °C. This allows reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 105 °C, provided PCB copper area and layout support adequate heat dissipation.
Can the VTVS12ASMF-M3-08 be used in bidirectional protection configurations?
No-the VTVS12ASMF-M3-08 is a unidirectional TVS diode, optimized for clamping positive transients on lines referenced to ground. For bidirectional protection (e.g., AC signal lines or differential buses), engineers must use dedicated bidirectional variants such as VTVS12GSMF-M3-08 (±2 % VBR, same package) or pair two unidirectional devices in series opposition.
VTVS12ASMF-M3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.4V
- Voltage - Breakdown (Min):
- 14V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 19.01A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 807pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS12ASMF-M3-08 FAQ
1.How can I place an order for VTVS12ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS12ASMF-M3-08 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 VTVS12ASMF-M3-08 reliable?
The price and inventory of VTVS12ASMF-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS12ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS12ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS12ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS12ASMF-M3-08?
VTVS12ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS12ASMF-M3-08 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 VTVS12ASMF-M3-08?
For technical support, including VTVS12ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS12ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS12ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS12ASMF-M3-08 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 VTVS12ASMF-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS12ASMF-M3-08?
All VTVS12ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS12ASMF-M3-08, 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 VTVS12ASMF-M3-08 part is unused and in its original packaging.
Return procedure for VTVS12ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS12ASMF-M3-08 Tags
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