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Vishay General Semiconductor - Diodes Division TA6F39AHM3/6B
- Part No.:
- TA6F39AHM3/6B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
TA6F39AHM3/6B.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO221AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TA6F39AHM3/6B from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor designed for clamping inductive switching transients and ESD events on signal lines and power rails. It features a breakdown voltage of 37.1–41.0 V, 600 W peak pulse power (10/1000 μs), 53.9 V maximum clamping voltage at 11.1 A, 185 °C max junction temperature, and AEC-Q101 qualification - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the TA6F39AHM3/6B datasheet, TA6F39AHM3/6B pinout, TA6F39AHM3/6B application, or TA6F39AHM3/6B equivalent, key selection criteria include unidirectional polarity, DO-221AC (SlimSMA) package compatibility, 33.3 V stand-off voltage, 1.0 μA reverse leakage at TJ = 150 °C, and MSL Level 1 reflow capability up to 260 °C.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low-profile mounting. Its junction design supports operation up to 185 °C and delivers consistent clamping performance under repetitive surge stress with minimal capacitance impact on signal integrity.
The device operates exclusively in unidirectional mode with cathode band polarity marking and is rated for 600 W peak pulse power per 10/1000 μs waveform. Thermal resistance is 145 °C/W (junction-to-ambient) on FR-4 with minimum pad layout and 20 °C/W (junction-to-mount), enabling robust thermal management in compact automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 37.1–41.0 V at 1.0 mA - defines precise voltage threshold where clamping initiates during overvoltage events |
| Stand-off Voltage (VWM) | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA at 150 °C |
| Clamping Voltage (VC) | 53.9 V at 11.1 A IPPM - limits transient voltage seen by protected ICs during 10/1000 μs surges |
| Peak Pulse Power (PPPM) | 600 W (10/1000 μs) - sustains high-energy transients without failure in automotive load-dump or inductive kick scenarios |
| Junction Temperature (TJ) | −65 to +185 °C - enables deployment in under-hood automotive environments and high-reliability industrial controls |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - protects against human-body-model electrostatic discharge in end-user interfaces |
| Package | DO-221AC (SlimSMA) - 0.95 mm profile, halogen-free, RoHS-compliant, AEC-Q101 qualified surface-mount package |
Pinout & Package
DO-221AC (SlimSMA) package: 2-terminal surface-mount device with cathode indicated by color band; overall dimensions 4.15 × 2.50 × 0.95 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes conduction path during reverse-biased clamping |
| Cathode | High-side connection point | Marked with color band; connected to protected line (e.g., CAN_H, sensor supply); conducts when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile (0.95 mm height) | Enables placement in space-constrained modules such as automotive ECUs and portable sensor nodes without mechanical interference |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| Junction passivation technology | Reduces long-term parameter drift and leakage growth under thermal stress, ensuring stable clamping over product lifetime |
| MSL Level 1 rating | Supports single-reflow assembly at peak 260 °C without preconditioning, simplifying manufacturing for high-volume OEM lines |
| 600 W surge capability | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (line dump) waveforms in 12 V automotive systems |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning circuitry. Use Value: Prevents ADC saturation and latch-up by limiting voltage to ≤53.9 V during 100 V/50 ms load-dump events while maintaining <1.0 μA leakage at 150 °C ambient. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subject to cable-induced surges and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional TA6F39AHM3/6B placed on VCC-referenced signal line to suppress negative-going transients only. Use Value: Provides 600 W surge handling with 33.3 V stand-off to avoid false triggering during normal 24 V bus operation while meeting IEC 61000-4-5 Level 3 immunity. |
| Consumer USB Port ESD Clamp | Telecom Power Rail Protection |
|
Use Scenario: Adding secondary ESD protection on VBUS line of USB 2.0 ports in set-top boxes and smart displays where primary protection resides upstream. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing fast HBM discharges (±15 kV air) before reaching USB controller's internal ESD structures. Use Value: Delivers 8 kV contact-mode ESD suppression with 53.9 V clamping to prevent damage to 5 V tolerant PHY transceivers without affecting signal rise time due to low junction capacitance. |
Use Scenario: Guarding 48 V DC power inputs of VoIP phones and base stations against lightning-induced surges on PoE or external adapters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail, coordinated with upstream fuse and downstream DC-DC converter overvoltage lockout. Use Value: Clamps 10/1000 μs surges up to 600 W while maintaining 33.3 V operating margin above nominal 48 V input, preventing brownout or shutdown during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Higher VBR (38–42.2 V), same DO-214AC package, 400 W PPPM, no AEC-Q101 qualification | Limited to commercial/industrial use; lacks automotive reliability validation and 185 °C TJ rating | Select SMAJ36A only for cost-sensitive non-automotive designs where 400 W surge capacity suffices and extended temperature operation is unnecessary. |
| 1.5SMC39A | Same VBR range (37.1–41.0 V), higher PPPM (1500 W), larger DO-214AB package (2.5 mm height), no AEC-Q101 | Requires more board area; suitable for high-surge industrial power supplies but incompatible with slim-profile automotive modules | Choose 1.5SMC39A when surge energy exceeds 600 W and board height constraints allow ≥2.5 mm; not recommended for AEC-Q101-mandated applications. |
Compared with SMAJ36A and 1.5SMC39A, TA6F39AHM3/6B uniquely combines AEC-Q101 qualification, 0.95 mm height, and 600 W capability in DO-221AC - making it the only option for space-limited automotive sensor nodes requiring validated high-temperature reliability.
Availability
TA6F39AHM3/6B is available at Aetrix Electronics and suitable for automotive sensor interface, industrial I/O protection, consumer USB port ESD clamp, and telecom power rail protection requiring stable component supply across production lifecycles.
Supply support for TA6F39AHM3/6B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-temperature performance.
The TA6F series belongs to Vishay's PAR® family of transient voltage suppressors engineered specifically for automotive and industrial applications demanding AEC-Q101 compliance, ultra-low profile packaging, and stable clamping under thermal stress.
FAQ
What is the exact breakdown voltage range for TA6F39AHM3/6B?
The TA6F39AHM3/6B has a guaranteed breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1.0 mA test current, as specified in the Vishay datasheet Document Number 89939. This range ensures reliable clamping initiation across process and temperature variations while maintaining compatibility with 33.3 V stand-off voltage requirements in 36 V nominal systems.
Is TA6F39AHM3/6B suitable for automotive applications?
Yes, TA6F39AHM3/6B is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood and transmission-control module applications. Its DO-221AC package meets MSL Level 1, and its 600 W surge rating aligns with ISO 7637-2 Pulse 1 and Pulse 3b test profiles required in automotive OEM specifications.
What does the "HM3/6B" suffix indicate in TA6F39AHM3/6B?
The "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and matte tin plating; "6B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 14,000 units. This differs from "6A" (7-inch reel, 3,500 units) and confirms full compliance with automotive supply chain traceability and environmental requirements.
How does TA6F39AHM3/6B compare to bidirectional TVS diodes?
TA6F39AHM3/6B is unidirectional only, meaning it clamps only reverse-polarity transients relative to its cathode-anode orientation. Unlike bidirectional devices, it provides tighter stand-off voltage control (33.3 V vs. typical 30 V symmetric) and lower leakage at high temperature - ideal for DC-biased signal lines like sensor outputs or 48 V power rails where polarity is fixed.
What is the maximum clamping voltage of TA6F39AHM3/6B under surge conditions?
The maximum clamping voltage (VC) of TA6F39AHM3/6B is 53.9 V at 11.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured and guaranteed per Vishay's datasheet, ensuring protected downstream ICs experience no more than 53.9 V during standardized surge events - critical for safeguarding 5 V or 3.3 V logic interfaces.
TA6F39AHM3/6B 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- 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)
TA6F39AHM3/6B FAQ
1.How can I place an order for TA6F39AHM3/6B through Aetrix?
Please submit a Request for Quotation (RFQ) for TA6F39AHM3/6B 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 TA6F39AHM3/6B reliable?
The price and inventory of TA6F39AHM3/6B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TA6F39AHM3/6B is usually 5 days.
3.What payment methods are accepted for TA6F39AHM3/6B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TA6F39AHM3/6B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TA6F39AHM3/6B?
TA6F39AHM3/6B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TA6F39AHM3/6B 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 TA6F39AHM3/6B?
For technical support, including TA6F39AHM3/6B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TA6F39AHM3/6B requirements.
6.How does Aetrix verify that TA6F39AHM3/6B is sourced from the original manufacturer or authorized distributors?
All TA6F39AHM3/6B 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 TA6F39AHM3/6B meets industry standards.
7.What is the process for return or replacement of TA6F39AHM3/6B?
All TA6F39AHM3/6B units undergo pre-shipment inspection (PSI). If there is an issue with TA6F39AHM3/6B, 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 TA6F39AHM3/6B part is unused and in its original packaging.
Return procedure for TA6F39AHM3/6B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TA6F39AHM3/6B Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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