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Vishay General Semiconductor - Diodes Division T4F15AHM3/I
- Part No.:
- T4F15AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F15AHM3/I.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
T4F15AHM3/I 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 15.0 V nominal breakdown voltage (VBR), 12.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 μs), 21.2 V maximum clamping voltage at 18.9 A surge current, and operates up to +185 °C junction temperature - deployed on signal lines of automotive sensor units and MOSFET gate drivers.
For engineers reviewing the T4F15AHM3/I datasheet, T4F15AHM3/I pinout, T4F15AHM3/I application, or T4F15AHM3/I 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 without generic assumptions.
Technical Context
The T4F15AHM3/I employs passivated anisotropic rectifier technology with junction passivation optimized for high-reliability operation under thermal stress. Its unidirectional configuration enables precise reverse-biased clamping during positive transients on DC supply or signal rails.
Rated for TJ = –65 °C to +185 °C and qualified per AEC-Q101, it supports automotive under-hood environments where sustained high ambient temperatures and repetitive ESD/lightning-induced surges occur. The device meets MSL Level 1 and is wave/reflow solderable with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 15.0 V - defines minimum voltage at which clamping initiates under 1.0 mA test current; ensures reliable turn-on before downstream IC damage |
| VWM | 12.8 V - maximum continuous reverse operating voltage; allows safe operation across 12 V automotive systems with margin |
| VC @ IPPM | 21.2 V - clamping voltage at 18.9 A peak pulse current; limits transient energy delivered to protected circuitry |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; sustains ISO 7637-2 Pulse 1/2/5a surges |
| TJ max. | +185 °C - enables placement near heat sources (e.g., engine control modules) without derating loss |
| RthJA | 135–160 °C/W - thermal resistance to ambient on FR4 PCB; informs heatsinking requirements for repeated surge duty |
| αT | 0.076 %/°C - temperature coefficient of VBR; predicts ±1.1% VBR shift over –40 °C to +125 °C ambient |
Pinout & Package
Package: SMF (DO-219AB) - low-profile surface-mount case with 2.9 mm × 1.3 mm body, 0.85 mm height, and cathode band marking. Compliant with JEDEC DO-219AB outline and UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference; establishes polarity for unidirectional clamping |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor output); absorbs transient energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Junction passivation | Reduces leakage drift and improves long-term stability under high-temperature bias conditions (TJ = 150 °C) |
| MSL Level 1 rating | Enables unlimited floor life and reflow compatibility up to 260 °C peak without baking preconditioning |
| Halogen-free & RoHS-compliant | Meets automotive environmental compliance mandates (JESD201 Class 2 whisker resistance, no halogen content) |
Applications
| Automotive Sensor Protection | Power Rail Clamping |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors in engine control units exposed to load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ground to clamp negative-going spikes while preserving DC signal integrity. Use Value: Limits clamping voltage to 21.2 V at 18.9 A, preventing latch-up or oxide breakdown in 3.3 V/5 V sensor interface ICs. | Use Scenario: Safeguarding 12 V supply rails feeding microcontrollers and communication transceivers in ADAS domain controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing ISO 7637-2 Pulse 5a (load dump) energy before reaching downstream regulators. Use Value: 400 W peak pulse power rating handles 35 V/100 ms transients without degradation, maintaining rail stability. |
| MOSFET Gate Protection | CAN/LIN Bus Line Protection |
Use Scenario: Shielding N-channel MOSFET gates in high-side switch drivers from ESD events and Miller-induced voltage overshoot. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between gate and source to suppress fast-rising transients without slowing switching edges. Use Value: 12.8 V VWM ensures no leakage during normal 10–15 V gate drive, while 21.2 V VC prevents gate oxide rupture. | Use Scenario: Guarding differential CAN_H/CAN_L or single-wire LIN bus lines against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Bidirectional protection not applicable; T4F15AHM3/I used on single-ended bias or termination nodes requiring unidirectional clamping. Use Value: 185 °C TJ max. supports placement near connectors in hot chassis locations without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5A (Vishay) | Same VBR (15.0 V), but SMA (DO-214AC) package; RthJA = 50 °C/W vs. 135–160 °C/W; lower power density | Used in non-automotive industrial controls; lacks AEC-Q101 qualification and 185 °C rating | Select when board space permits larger footprint and automotive qualification is not required |
| 1.5SMC15A (ON Semiconductor) | Identical VBR/VC specs, but SMC (DO-214AB) package; 1.5 kW PPPM rating; higher thermal mass but larger size | Preferred for high-energy surge zones (e.g., battery input); not optimized for tight automotive sensor layouts | Choose for legacy designs using SMC footprints or where >400 W pulse handling is needed |
Compared with SMAJ15A-E3/5A and 1.5SMC15A, the T4F15AHM3/I delivers superior thermal performance in constrained spaces, AEC-Q101 validation for automotive deployment, and a compact SMF (DO-219AB) footprint ideal for modern sensor modules and ECU edge nodes.
Availability
T4F15AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, 12 V power rail clamping, and MOSFET gate safeguarding requiring stable component supply across production lifecycles.
Supply support for T4F15AHM3/I 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, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The eSMP® Series - including T4F15AHM3/I - was engineered specifically for high-temperature, high-reliability automotive applications where small size, AEC-Q101 compliance, and robust transient immunity are mandatory.
FAQ
What is the exact breakdown voltage tolerance for T4F15AHM3/I?
The T4F15AHM3/I has a specified breakdown voltage range of 14.3 V (min) to 15.8 V (max) at 1.0 mA test current, with 15.0 V as the nominal value. This ±0.7 V tolerance ensures consistent clamping behavior across production lots and supports design margining for automotive voltage variation.
Is T4F15AHM3/I compatible with lead-free reflow soldering processes?
Yes, T4F15AHM3/I is fully compatible with lead-free reflow soldering, rated for a maximum peak temperature of 260 °C per J-STD-020 MSL Level 1. Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 2 whisker testing.
Does T4F15AHM3/I support bidirectional transient suppression?
No, T4F15AHM3/I is a unidirectional TVS diode and only provides clamping for positive transients on the cathode side relative to anode. For bidirectional protection, two devices in series-opposing configuration or a dedicated bidirectional part such as T4F15AHE3 would be required.
What is the maximum reverse leakage current of T4F15AHM3/I at 125 °C?
At VWM = 12.8 V and TJ = 125 °C, the maximum reverse leakage current for T4F15AHM3/I is 5.0 μA. This low leakage preserves signal integrity and minimizes power loss in always-on automotive circuits.
How does the thermal resistance of T4F15AHM3/I impact its surge repetition capability?
The T4F15AHM3/I's RthJA of 135–160 °C/W directly limits its ability to dissipate heat between successive surges. At 25 °C ambient, it can sustain ~1 pulse/second at full 400 W without exceeding 185 °C junction temperature; higher repetition rates require derating per Figure 2 in the datasheet.
T4F15AHM3/I 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 18.9A
- 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)
T4F15AHM3/I FAQ
1.How can I place an order for T4F15AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F15AHM3/I 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 T4F15AHM3/I reliable?
The price and inventory of T4F15AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F15AHM3/I is usually 5 days.
3.What payment methods are accepted for T4F15AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F15AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F15AHM3/I?
T4F15AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F15AHM3/I 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 T4F15AHM3/I?
For technical support, including T4F15AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F15AHM3/I requirements.
6.How does Aetrix verify that T4F15AHM3/I is sourced from the original manufacturer or authorized distributors?
All T4F15AHM3/I 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 T4F15AHM3/I meets industry standards.
7.What is the process for return or replacement of T4F15AHM3/I?
All T4F15AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T4F15AHM3/I, 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 T4F15AHM3/I part is unused and in its original packaging.
Return procedure for T4F15AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T4F15AHM3/I Tags
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