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Vishay General Semiconductor - Diodes Division T4F47AHM3/H
- Part No.:
- T4F47AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F47AHM3/H.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:21,090
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Product details
Overview
T4F47AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in the eSMP® Series, designed for automotive-grade circuit protection. It features a 47.0 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 64.8 V maximum clamping voltage at 6.2 A surge current, and operates up to +185 °C junction temperature in the SMF (DO-219AB) package.
For engineers reviewing the T4F47AHM3/H datasheet, T4F47AHM3/H pinout, T4F47AHM3/H application, or T4F47AHM3/H equivalent, this device is selected for high-reliability automotive sensor line protection, MOSFET gate clamp circuits, and 12 V/24 V power rail transient suppression where AEC-Q101 qualification and MSL Level 1 reflow compatibility are mandatory.
Technical Context
The T4F47AHM3/H employs passivated anisotropic rectifier technology with optimized junction passivation for stable performance under thermal stress. Its unidirectional architecture provides low-leakage reverse blocking (1.0 µA at 40.2 V) and precise clamping response during fast transients.
Rated for TJ = –65 °C to +185 °C, it delivers 400 W peak pulse power per 10/1000 µs waveform and supports wave/reflow soldering per J-STD-020 (MSL Level 1, 260 °C peak). The device is qualified to AEC-Q101 and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 47.0 V - Ensures reliable triggering above 40.2 V stand-off voltage while maintaining margin against normal operating transients. |
| VC @ IPPM | 64.8 V - Clamps induced surges to safe levels for downstream 48 V-rated ICs and MOSFETs during 6.2 A 10/1000 µs events. |
| PPPM | 400 W - Sustains high-energy lightning and load-dump transients common in automotive 12 V/24 V systems. |
| ID @ VWM | 1.0 µA - Minimizes standby power loss and avoids false triggering in low-current sensor signal paths. |
| TJ max. | +185 °C - Enables operation in engine bay and powertrain locations without derating in high-ambient environments. |
| Package | SMF (DO-219AB) - Low-profile 2.9 mm × 1.3 mm footprint compatible with automated SMT assembly and high-density PCB layouts. |
| AEC-Q101 | Qualified - Meets automotive reliability standards for temperature cycling, humidity, and mechanical shock testing. |
Pinout & Package
Package: SMF (DO-219AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference plane to complete clamping loop during overvoltage events. |
| Cathode | Protected line connection | Connected to the signal or power line requiring protection; reverse-biased during normal operation, conducts during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature capability | TJ = +185 °C enables use in under-hood automotive modules without thermal derating penalties. |
| AEC-Q101 qualification | Validated for automotive electronics including ADAS sensors, body control units, and power distribution systems. |
| Low-profile SMF package | Height ≤ 1.08 mm allows integration into space-constrained modules such as camera ECUs and radar front-ends. |
| MSL Level 1 rating | Supports single-pass reflow at 260 °C without moisture-induced damage, eliminating bake requirements pre-assembly. |
| Passivated anisotropic rectifier | Delivers stable VBR tolerance (±5 %) and low leakage across temperature and lifetime stress conditions. |
Applications
| Automotive Sensor Protection | Power Rail Clamp |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching spikes in vehicle chassis modules. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground to shunt transients before they reach sensitive input stages. Use Value: Prevents latch-up and permanent damage in 5 V/3.3 V interface ICs while maintaining <1.0 µA leakage at 40.2 V operating voltage. |
Use Scenario: Suppressing load-dump transients on 12 V/24 V battery-fed power rails in infotainment head units and lighting control modules. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input supply to absorb 400 W pulses without affecting system regulation. Use Value: Limits voltage excursion to ≤64.8 V during ISO 7637-2 Pulse 5a events, protecting DC/DC converters and microcontrollers. |
| MOSFET Gate Protection | Industrial Control I/O |
|
Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in motor drivers and solenoid controllers. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp between gate and source to prevent gate oxide breakdown. Use Value: Achieves 64.8 V clamping at 6.2 A with <100 ns response time, ensuring gate voltage stays within ±20 V absolute maximum rating. |
Use Scenario: Safeguarding digital I/O lines of PLC modules and industrial HMIs exposed to field wiring transients and EFT bursts. IC Role / Device Role / Timing Role: Point-of-entry TVS on isolated digital inputs to divert surge energy before optocoupler or level-shifter stages. Use Value: Maintains 1.0 µA leakage at 40.2 V and withstands repeated 4 kV ESD (IEC 61000-4-2) without 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 |
|---|---|---|---|
| SMAJ47A-E3/57T | Same VBR (47 V), but lower PPPM = 400 W only at 10/1000 µs; RthJA = 170 °C/W vs. 135–160 °C/W for T4F47AHM3/H. | Not AEC-Q101 qualified; rated for commercial/industrial use only. | Select when automotive qualification is not required and thermal margin is sufficient for ambient <85 °C. |
| 1.5SMC47A | Higher VC = 77.0 V at same IPPM; larger SMC (DO-214AB) package (7.1 mm × 6.2 mm) vs. SMF (2.9 mm × 1.3 mm). | Designed for higher-power industrial surge protection; incompatible with space-constrained automotive PCBs. | Choose only if board layout permits larger footprint and clamping voltage margin allows 77.0 V peak. |
Compared with SMAJ47A-E3/57T and 1.5SMC47A, the T4F47AHM3/H offers superior thermal resistance, AEC-Q101 compliance, and compact SMF packaging-making it the preferred choice for automotive electronics where reliability, size, and qualification are non-negotiable.
Availability
T4F47AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, power rail clamp, and MOSFET gate protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for T4F47AHM3/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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The T4F47AHM3/H belongs to Vishay's eSMP® PAR® TVS family, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments with extended temperature range and robust solderability.
FAQ
What is the breakdown voltage tolerance for T4F47AHM3/H?
The T4F47AHM3/H has a breakdown voltage (VBR) range of 44.7 V (min) to 49.4 V (max) at 1.0 mA test current, yielding a nominal value of 47.0 V with ±5 % tolerance. This tight specification ensures consistent clamping behavior across production lots and temperature ranges, critical for predictable protection in automotive safety-critical circuits.
Is T4F47AHM3/H suitable for bidirectional transient suppression?
No, the T4F47AHM3/H is unidirectional only, as confirmed in the Vishay datasheet. It must be used with cathode connected to the protected line and anode to ground. For bidirectional applications requiring symmetrical clamping, a different device such as the SMBJ47CA would be required-not the T4F47AHM3/H.
What is the maximum clamping voltage of T4F47AHM3/H at its rated surge current?
The T4F47AHM3/H exhibits a maximum clamping voltage (VC) of 64.8 V at 6.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 3 in the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does T4F47AHM3/H require special handling for moisture sensitivity?
No-T4F47AHM3/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can undergo standard reflow soldering at 260 °C peak temperature without prior baking. This eliminates moisture-related defects and simplifies manufacturing for high-volume automotive PCB assembly.
How does the thermal resistance of T4F47AHM3/H compare to standard SMA packages?
The T4F47AHM3/H in SMF (DO-219AB) package achieves RthJA = 135–160 °C/W, significantly lower than typical SMA (DO-214AC) devices (~200 °C/W). This improved thermal performance allows higher sustained power dissipation and better reliability in high-ambient-temperature automotive applications compared to legacy packages.
T4F47AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 400W
- 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-219AB (SMF)
T4F47AHM3/H FAQ
1.How can I place an order for T4F47AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F47AHM3/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 T4F47AHM3/H reliable?
The price and inventory of T4F47AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F47AHM3/H is usually 5 days.
3.What payment methods are accepted for T4F47AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F47AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F47AHM3/H?
T4F47AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F47AHM3/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 T4F47AHM3/H?
For technical support, including T4F47AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F47AHM3/H requirements.
6.How does Aetrix verify that T4F47AHM3/H is sourced from the original manufacturer or authorized distributors?
All T4F47AHM3/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 T4F47AHM3/H meets industry standards.
7.What is the process for return or replacement of T4F47AHM3/H?
All T4F47AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T4F47AHM3/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 T4F47AHM3/H part is unused and in its original packaging.
Return procedure for T4F47AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T4F47AHM3/H Tags
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