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Vishay General Semiconductor - Diodes Division T4F43AHM3/H
- Part No.:
- T4F43AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F43AHM3/H.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:21,100
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Product details
Overview
T4F43AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in the eSMP® Series, designed for automotive-grade overvoltage protection. It features a 43.0 V nominal breakdown voltage (VBR), 36.8 V stand-off voltage (VWM), 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard sensor signal lines and MOSFET gates in engine control units.
For engineers reviewing the T4F43AHM3/H datasheet, T4F43AHM3/H pinout, T4F43AHM3/H application, or T4F43AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMF (DO-219AB) package dimensions, thermal resistance values, and real-world automotive protection use cases - all confirmed against Vishay Document #87645 (Rev. 14-Feb-2023).
Technical Context
The T4F43AHM3/H employs passivated anisotropic rectifier technology optimized for high-reliability operation up to 185 °C junction temperature, meeting stringent automotive requirements. Its unidirectional configuration provides low-leakage reverse blocking (≤1.0 µA at VWM) and precise clamping response under fast transients.
It is rated for 400 W peak pulse power per 10/1000 µs waveform, with thermal resistance RthJA ≤160 °C/W on FR4 PCB and RthJM ≤18 °C/W per JEDEC 51-14 TDIM method - enabling robust thermal performance in compact SOD-123W-compatible layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 43.0 V - ensures reliable triggering above system operating voltage while avoiding false trips during normal operation |
| VWM | 36.8 V - maximum continuous reverse voltage the device blocks without significant leakage |
| VC @ IPPM | 59.3 V - clamping voltage at 6.7 A surge current, limiting downstream IC stress during ESD or load dump |
| PPPM | 400 W - peak transient energy absorption capability compatible with ISO 7637-2 Pulse 1/2a/5a test profiles |
| TJ max. | 185 °C - enables placement near high-temperature zones like powertrain ECUs without derating |
| AEC-Q101 | Qualified - certified for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Package | SMF (DO-219AB) - low-profile 2.9 mm × 1.3 mm footprint with matte tin-plated leads, MSL Level 1 compliant |
Pinout & Package
Package: SMF (DO-219AB), surface-mount, unidirectional configuration with cathode indicated by color band. Dimensions: 2.9 mm × 1.3 mm × 1.08 mm (L × W × H), compatible with SOD-123W footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to protected line ground reference | Provides low-impedance path to ground when transient exceeds VBR, shunting surge away from sensitive circuitry |
| Cathode | Current exit point during clamping; connected to protected signal or power rail | Defines polarity-sensitive connection - must be tied to the line requiring overvoltage protection (e.g., CAN_H, LIN, sensor VOUT) |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and leakage performance across 185 °C lifetime operation |
| Clamping ratio (VC/VBR) | 1.38 - tight ratio minimizes overvoltage margin, reducing risk of downstream component overstress |
| Thermal resistance (RthJM) | ≤18 °C/W - enables efficient heat transfer to PCB copper, supporting sustained surge handling in confined spaces |
| Lead finish | Matte tin plating per J-STD-002 - ensures reliable solder wetting and intermetallic formation during reflow and wave soldering |
| Whisker resistance | JESD 201 Class 2 qualified - mitigates tin whisker growth risk in long-life automotive modules |
Applications
| Automotive Sensor Protection | Powertrain Control Module |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors exposed to load-dump and inductive switching transients in engine bay environments. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and microcontroller ADC input, clamping surges before they reach precision analog front-end. Use Value: Maintains signal integrity with ≤1.0 µA leakage at 36.8 V, preventing offset drift while surviving repeated 400 W pulses per ISO 7637-2. | Use Scenario: Safeguarding gate drivers and logic inputs in transmission control units subjected to battery reverse polarity and jump-start surges. IC Role / Device Role / Timing Role: Standoff protection element on 12 V supply rails and isolated communication interfaces (e.g., SENT, PWM feedback lines). Use Value: Withstands 185 °C junction temperature and AEC-Q101 qualification, ensuring reliability over 15-year vehicle service life without derating. |
| Body Electronics ECU | Infotainment System Interface |
Use Scenario: Shielding LIN bus transceivers and door module microcontrollers from ESD events and alternator ripple-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector interface, minimizing stub length to preserve signal rise time. Use Value: 59.3 V clamping voltage limits transients below MCU I/O absolute maximum ratings while maintaining <10 pF junction capacitance (typ.) at zero bias. | Use Scenario: Protecting USB 2.0 data lines and display backlight control signals in head unit assemblies against hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable layout not applicable; unidirectional T4F43AHM3/H used on DC rails only (e.g., 5 V USB VBUS, 3.3 V display logic). Use Value: Halogen-free, RoHS-compliant HM3 suffix meets automotive material compliance standards without sacrificing surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5A (Vishay) | Same VBR (43 V), but SMA package (DO-214AC); higher RthJA (190 °C/W), lower IPPM (6.3 A) | Larger footprint (4.5 mm × 2.7 mm); less suitable for ultra-compact automotive modules | Select when board space allows larger package and legacy SMA footprint compatibility is required |
| 1.5SMC43A (ON Semiconductor) | Same VBR and PPPM, but SMC package (DO-214AB); RthJA = 165 °C/W, VC = 69.4 V | Higher clamping voltage increases risk of downstream overvoltage; not AEC-Q101 qualified | Acceptable for industrial non-automotive use where AEC-Q101 is not mandated and thermal margin permits |
Compared with SMAJ43A-E3/5A and 1.5SMC43A, the T4F43AHM3/H delivers superior thermal performance (RthJM ≤18 °C/W), tighter clamping (59.3 V vs. ≥69.4 V), and full AEC-Q101 qualification - making it the preferred choice for next-generation automotive ECUs where size, reliability, and specification compliance are critical.
Availability
T4F43AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, powertrain control modules, and body electronics ECUs requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for T4F43AHM3/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 diodes, rectifiers, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The T4F43AHM3/H belongs to the eSMP® PAR® TVS family, engineered specifically for automotive electronics requiring AEC-Q101 qualification, high-temperature operation, and compact surface-mount packaging.
FAQ
What is the exact breakdown voltage range for T4F43AHM3/H?
The T4F43AHM3/H has a specified breakdown voltage (VBR) range of 40.9 V (min) to 45.2 V (max) at 1.0 mA test current, with a nominal value of 43.0 V. This range is measured per ANSI/IEEE C62.35 and validated per Vishay Document #87645, ensuring consistent triggering behavior across production lots and temperature extremes up to 185 °C.
Is T4F43AHM3/H qualified for automotive applications?
Yes, the T4F43AHM3/H is AEC-Q101 qualified and explicitly rated for automotive use. It meets stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its 185 °C maximum junction temperature and halogen-free HM3 suffix further align with automotive OEM material and reliability mandates.
What package type does T4F43AHM3/H use, and is it compatible with automated assembly?
The T4F43AHM3/H uses the SMF (DO-219AB) package - a low-profile, surface-mount case with 2.9 mm × 1.3 mm footprint. It is fully compatible with standard reflow and wave soldering processes, meets J-STD-002 solderability requirements, and carries MSL Level 1 rating (peak reflow temperature 260 °C), enabling seamless integration into high-volume automotive PCB assembly lines.
How does the clamping voltage of T4F43AHM3/H compare to its breakdown voltage?
The T4F43AHM3/H exhibits a clamping voltage (VC) of 59.3 V at 6.7 A peak pulse current, yielding a clamping ratio (VC/VBR) of approximately 1.38. This tight ratio ensures minimal overvoltage exposure to downstream ICs during transients, directly supporting robust design margins for automotive microcontrollers and analog sensors rated to 60 V absolute maximum.
Does T4F43AHM3/H have any special material or environmental certifications?
Yes, the T4F43AHM3/H carries the HM3 suffix, indicating halogen-free construction, RoHS compliance, and qualification to JESD 201 Class 2 for tin whisker resistance. Its molding compound meets UL 94 V-0 flammability rating, and all materials comply with Vishay's standardized categorization per Doc. #99912 - fulfilling Tier 1 automotive supplier substance restrictions.
T4F43AHM3/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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
T4F43AHM3/H FAQ
1.How can I place an order for T4F43AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F43AHM3/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 T4F43AHM3/H reliable?
The price and inventory of T4F43AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F43AHM3/H is usually 5 days.
3.What payment methods are accepted for T4F43AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F43AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F43AHM3/H?
T4F43AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F43AHM3/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 T4F43AHM3/H?
For technical support, including T4F43AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F43AHM3/H requirements.
6.How does Aetrix verify that T4F43AHM3/H is sourced from the original manufacturer or authorized distributors?
All T4F43AHM3/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 T4F43AHM3/H meets industry standards.
7.What is the process for return or replacement of T4F43AHM3/H?
All T4F43AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T4F43AHM3/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 T4F43AHM3/H part is unused and in its original packaging.
Return procedure for T4F43AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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