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Vishay General Semiconductor - Diodes Division TA6F20AHM3_A/H
- Part No.:
- TA6F20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
TA6F20AHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,963
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Product details
Overview
TA6F20AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SlimSMA (DO-221AC) package, rated for 20 V breakdown voltage (VBR = 19.0–21.0 V at 1 mA), 17.1 V stand-off voltage (VWM), and 600 W peak pulse power (10/1000 µs). It delivers 27.7 A peak pulse current (IPPM) with 21.7 V clamping voltage (VC) and operates up to +185 °C junction temperature - designed for automotive sensor line protection against inductive switching transients.
For engineers reviewing the TA6F20AHM3_A/H datasheet, TA6F20AHM3_A/H pinout, TA6F20AHM3_A/H application, or TA6F20AHM3_A/H equivalent, this device requires attention to unidirectional polarity marking, MSL Level 1 reflow compatibility (260 °C peak), AEC-Q101 qualification, IEC 61000-4-2 ±30 kV ESD rating, and thermal resistance (RθJA = 120–150 °C/W) under FR4 PCB mounting conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low-profile mounting. Its junction passivation enables reliable operation at TJ = 185 °C and supports automated SMT placement on automotive-grade PCBs with minimum recommended pad layout per JEDEC 51-2A.
The device exhibits a positive temperature coefficient of breakdown voltage (αT = 0.082 %/°C), enabling predictable VBR drift over temperature. Clamping performance is specified at IPPM = 27.7 A (10/1000 µs), with VC = 21.7 V ensuring robust protection of downstream MOSFETs and signal ICs without excessive voltage overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V at IT = 1 mA - defines precise voltage threshold where avalanche conduction begins, critical for accurate overvoltage triggering |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA, sets safe operating margin below VBR |
| IPPM (10/1000 µs) | 27.7 A - peak surge current it can safely clamp without failure, directly determines protection level against ISO 7637-2 Pulse 1/2a/5a |
| VC at IPPM | 21.7 V - clamped voltage during full-rated surge, must stay below protected IC's absolute maximum rating |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 µs waveform, key for transient energy absorption |
| TJ max | +185 °C - enables use in under-hood automotive environments and high-power density layouts without derating |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - provides system-level ESD immunity without additional discrete protection stages |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low profile (0.95 mm typical height), halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by color band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to GND or low-side reference in unidirectional TVS configuration | Must be routed to lowest-impedance ground plane to minimize clamping loop inductance and ensure effective transient suppression |
| Cathode | Current exit terminal during reverse-biased avalanche clamping; connects to protected line (e.g., CAN_H, LIN, sensor supply) | Marked by visible band; polarity error causes open-circuit failure - mandatory verification during layout and assembly |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise overvoltage protection on DC-biased lines (e.g., 12 V sensor supplies) without interfering with normal signal polarity |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces per stress test requirements |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without preconditioning, eliminating moisture sensitivity handling overhead in production |
| Junction passivated anisotropic rectifier | Delivers stable leakage (<1 µA at VWM) and repeatable VBR across temperature and lifetime, critical for long-term reliability |
| 0.95 mm typical height | Reduces board space and improves mechanical robustness in vibration-prone automotive modules versus larger SMA/SMB packages |
Applications
| Automotive Sensor Protection | CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine bay modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VSUPPLY and chassis ground to clamp transients before they reach the sensor ASIC. Use Value: With VC = 21.7 V and TJ = 185 °C rating, TA6F20AHM3_A/H ensures sensor ICs survive repeated 12 V system surges while maintaining operational integrity at elevated ambient temperatures. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in vehicle network gateways against ESD and coupled transients. IC Role / Device Role / Timing Role: One TA6F20AHM3_A/H per line (CAN_H to GND, CAN_L to GND) providing bidirectional-like protection via dual unidirectional placement. Use Value: ±30 kV IEC 61000-4-2 ESD rating and 600 W pulse power enable compliance with ISO 10605 without adding capacitance-sensitive components that degrade 1 Mbps CAN signal integrity. |
| Industrial Motor Drive I/O Protection | Power Supply Input Stage Clamping |
|
Use Scenario: Shielding microcontroller GPIOs connected to limit switches or encoder feedback lines in motor control cabinets. IC Role / Device Role / Timing Role: TVS placed at connector entry point to absorb fast-rising transients induced by relay coil de-energization or nearby VFD switching noise. Use Value: 27.7 A IPPM and 21.7 V VC limit voltage excursion to within MCU I/O absolute maximum ratings (typically 36 V), preventing latch-up or permanent damage. |
Use Scenario: Clamping input rails of DC-DC converters fed from 24 V industrial buses subject to ISO 16750-2 load dump pulses. IC Role / Device Role / Timing Role: Primary transient suppressor upstream of input filter capacitors and converter controller ICs. Use Value: 600 W PPPM and 185 °C TJ allow sustained operation during repetitive 35 V/100 ms load dump events without thermal runaway or parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VBR range (19.0–21.0 V), but SMA package (higher profile: 2.29 mm), RθJA = 160 °C/W, no AEC-Q101 qualification | Limited to non-automotive industrial use; unsuitable for under-hood or space-constrained modules | Select when cost priority outweighs height constraint and automotive qualification is not required |
| TPSMD20A | DO-214AB package, VBR = 21.1–23.3 V, VC = 32.4 V at 24.5 A, PPPM = 600 W, AEC-Q101 qualified | Higher clamping voltage reduces margin for 24 V rail protection; larger footprint increases board area | Choose if higher surge current tolerance is needed and board space permits larger outline |
Compared with SMAJ20A and TPSMD20A, TA6F20AHM3_A/H offers the lowest profile (0.95 mm), tightest VC (21.7 V), and verified AEC-Q101 compliance in SlimSMA - making it optimal for next-generation compact automotive ECUs where thermal management and reliability are co-constrained.
Availability
TA6F20AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus interface hardening, and industrial motor drive I/O conditioning requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for TA6F20AHM3_A/H 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The TA6F series belongs to Vishay's PAR® family of surface-mount TVS diodes engineered specifically for AEC-Q101-compliant automotive transient suppression - emphasizing high-temperature stability, low-profile packaging, and repeatable clamping performance under harsh environmental stress.
FAQ
What is the exact breakdown voltage range for TA6F20AHM3_A/H?
The TA6F20AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 19.0 V to 21.0 V at test current IT = 1.0 mA, measured per the Vishay datasheet (Doc. #89939, Rev. 16-Jan-2025). This range ensures consistent avalanche initiation across production lots and supports design margining for 20 V nominal systems. The TA6F20AHM3_A/H datasheet specifies this value under standard test conditions and confirms its stability up to TJ = 185 °C.
Is TA6F20AHM3_A/H compatible with lead-free reflow processes?
Yes, TA6F20AHM3_A/H meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, fully compliant with standard lead-free soldering profiles. Its SlimSMA (DO-221AC) package uses matte tin-plated terminals qualified per J-STD-002 and JESD22-B102, and passes JESD201 Class 2 whisker testing - making TA6F20AHM3_A/H suitable for high-volume automated assembly without moisture preconditioning.
Does TA6F20AHM3_A/H provide bidirectional protection?
No, TA6F20AHM3_A/H is a unidirectional TVS diode, meaning it clamps only in reverse bias (cathode positive relative to anode). For bidirectional protection, two TA6F20AHM3_A/H devices must be used in series opposition or a dedicated bidirectional part like TA6F20CA selected. The unidirectional nature of TA6F20AHM3_A/H is confirmed in the "Polarity" section of the datasheet and reflected in its cathode-band marking.
What is the clamping voltage of TA6F20AHM3_A/H at its rated surge current?
The TA6F20AHM3_A/H clamps to a maximum of 21.7 V at its rated peak pulse current IPPM = 27.7 A (10/1000 µs waveform), as specified in the Electrical Characteristics table of the Vishay datasheet. This VC value is critical for ensuring protected ICs remain within their absolute maximum voltage ratings during transient events - and TA6F20AHM3_A/H achieves this with minimal voltage overshoot due to its low dynamic impedance.
How does TA6F20AHM3_A/H differ from other 20 V TVS diodes in SlimSMA package?
TA6F20AHM3_A/H is distinguished by its AEC-Q101 qualification, 185 °C maximum junction temperature, and 0.082 %/°C temperature coefficient of VBR, all verified per Vishay Doc. #89939. Unlike generic 20 V SlimSMA TVS parts, TA6F20AHM3_A/H undergoes automotive-specific stress testing and features junction passivation for stable leakage (<1 µA at VWM) across temperature - making TA6F20AHM3_A/H uniquely suited for mission-critical automotive applications.
TA6F20AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
TA6F20AHM3_A/H FAQ
1.How can I place an order for TA6F20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TA6F20AHM3_A/H 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 TA6F20AHM3_A/H reliable?
The price and inventory of TA6F20AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TA6F20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TA6F20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TA6F20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TA6F20AHM3_A/H?
TA6F20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TA6F20AHM3_A/H 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 TA6F20AHM3_A/H?
For technical support, including TA6F20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TA6F20AHM3_A/H requirements.
6.How does Aetrix verify that TA6F20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TA6F20AHM3_A/H 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 TA6F20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TA6F20AHM3_A/H?
All TA6F20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TA6F20AHM3_A/H, 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 TA6F20AHM3_A/H part is unused and in its original packaging.
Return procedure for TA6F20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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