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Vishay General Semiconductor - Diodes Division T4F30AHM3/H
- Part No.:
- T4F30AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F30AHM3/H.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:21,050
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Product details
Overview
T4F30AHM3/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 30.0 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 41.4 V maximum clamping voltage at 9.7 A IPPM, and operates up to +185 °C junction temperature - ideal for protecting automotive sensor signal lines and MOSFET gates against inductive switching transients.
For engineers reviewing the T4F30AHM3/H datasheet, T4F30AHM3/H pinout, T4F30AHM3/H application, or T4F30AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, SMF (DO-219AB) package compatibility, unidirectional polarity with cathode band marking, and thermal resistance RthJA of 135–160 °C/W on FR4 PCB.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its unidirectional architecture provides precise clamping during positive-going transients while maintaining <1.0 μA reverse leakage at 25.6 V stand-off voltage (VWM) and <5.0 μA at 150 °C.
The device meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements (260 °C peak), enabling robust wave and reflow soldering. Its 0.015 g unit weight and 3000-piece 7" tape-and-reel packaging support automated SMT assembly for automotive electronics production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 30.0 V - ensures reliable triggering above system operating voltage without false clamping |
| VWM | 25.6 V - maximum continuous reverse working voltage compatible with 24 V automotive systems |
| VC @ IPPM | 41.4 V - clamps surge energy within safe limits for downstream ICs and MOSFETs |
| PPPM | 400 W - handles high-energy transients per ISO 7637-2 Pulse 1/2a/5a test profiles |
| TJ max. | +185 °C - supports under-hood placement and extended-life reliability in automotive environments |
| Package | SMF (DO-219AB) - low-profile, halogen-free, RoHS-compliant, AEC-Q101 qualified case outline |
| Polarity | Unidirectional - protects against positive transients only; cathode marked by color band |
Pinout & Package
Package: SMF (DO-219AB) - surface-mount, low-profile plastic case with matte tin-plated leads, UL 94 V-0 molding compound, and JEDEC-compliant footprint (3.9 mm × 2.7 mm × 1.3 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events |
| Cathode | Clamping node input | Connected to protected line (e.g., sensor output); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock testing |
| Junction temperature rating | Rated for continuous operation up to +185 °C - exceeds standard automotive under-hood requirements |
| Low-profile SMF package | Enables high-density PCB layouts and compatibility with automated optical inspection (AOI) systems |
| Halogen-free & RoHS-compliant | Meets global environmental compliance standards without compromising electrical performance or reliability |
| MSL Level 1 rating | Allows unlimited floor life and full reflow compatibility at 260 °C peak without preconditioning |
Applications
| Automotive Sensor Protection | 24 V Power Rail Clamping |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input. Use Value: Limits transient voltage to ≤41.4 V, preventing damage to 3.3 V or 5 V ADC inputs while maintaining <1.0 μA leakage at 25.6 V operating voltage. | Use Scenario: Safeguarding 24 V supply rails feeding infotainment head units and body control modules during alternator load dump events. IC Role / Device Role / Timing Role: Primary clamping device across rail-to-ground, absorbing up to 400 W of surge energy. Use Value: Withstands 9.7 A peak surge current and clamps to 41.4 V, ensuring downstream DC-DC converters remain within safe input voltage range. |
| Motor Driver Gate Protection | Industrial CAN Bus Line Protection |
Use Scenario: Shielding high-side and low-side MOSFET gate drivers in electric power steering (EPS) motor controllers from Miller-induced spikes. IC Role / Device Role / Timing Role: Localized TVS placed between gate and source terminals of discrete power FETs. Use Value: Fast response (<1 ns) and low clamping voltage preserve gate oxide integrity and prevent unintended turn-on during fast dv/dt events. | Use Scenario: Protecting CAN_H and CAN_L differential pairs in vehicle telematics modules from ESD and ISO 10605 contact discharge. IC Role / Device Role / Timing Role: Unidirectional TVS on each bus line referenced to ground, leveraging low capacitance and AEC-Q101 reliability. Use Value: Maintains signal integrity with minimal parasitic capacitance while meeting automotive ESD immunity requirements up to ±25 kV air discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same VBR (30 V), but lower PPPM = 400 W (same), higher VC = 48.4 V, SMA package (larger footprint, higher RthJA) | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select when automotive qualification is not required and board space allows larger SMA footprint |
| TPSMD30A | Same VBR/VC, identical SMF package, but rated for 600 W PPPM; higher IPPM = 14.5 A | Higher surge margin for severe load-dump conditions; same AEC-Q101 and MSL Level 1 ratings | Choose when system-level surge testing exceeds ISO 7637-2 Pulse 5a requirements |
Compared with SMAJ30A and TPSMD30A, the T4F30AHM3/H delivers optimal balance of automotive qualification, compact SMF footprint, and precise 41.4 V clamping - making it preferred for space-constrained, high-reliability 24 V signal and power line protection where thermal management and long-term under-hood stability are critical.
Availability
T4F30AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, 24 V power rail protection, and motor driver gate circuits requiring stable component supply across multi-year production programs.
Supply support for T4F30AHM3/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 T4F30AHM3/H belongs to Vishay's eSMP® PAR® TVS family, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal robustness, low leakage, and repeatable clamping performance over temperature and lifetime.
FAQ
What is the breakdown voltage tolerance for T4F30AHM3/H?
The T4F30AHM3/H has a specified breakdown voltage (VBR) range of 28.5 V (min) to 31.5 V (max) at 1.0 mA test current, with a nominal value of 30.0 V. This ±5% tolerance ensures consistent clamping behavior across production lots while accommodating process variation without compromising protection margins in 24 V automotive systems.
Is T4F30AHM3/H suitable for bidirectional transient protection?
No, T4F30AHM3/H is strictly unidirectional and designed only for positive-going transients on the cathode side. It does not provide protection against negative voltage excursions. For bidirectional applications such as data line protection (e.g., USB, CAN), a dedicated bidirectional TVS like SMBJ33CA must be used instead of T4F30AHM3/H.
What is the maximum reverse leakage current of T4F30AHM3/H at elevated temperature?
At VWM = 25.6 V and TJ = 150 °C, the T4F30AHM3/H exhibits a maximum reverse leakage current (ID) of 5.0 μA. This low leakage ensures minimal power loss and signal distortion in always-on automotive subsystems, even under sustained high-temperature operation.
Does T4F30AHM3/H require special PCB layout considerations?
Yes - to maintain effective clamping, the T4F30AHM3/H should be placed as close as possible to the protected node with short, low-inductance traces. The recommended footprint matches JEDEC DO-219AB dimensions (3.9 mm × 2.7 mm), and thermal relief pads should follow Vishay's suggested copper area (0.2" × 0.2") to achieve the rated RthJA of 135 °C/W.
How is the T4F30AHM3/H marked for polarity identification?
The T4F30AHM3/H uses a visible color band on the cathode end of the SMF (DO-219AB) package to denote polarity. This marking aligns with industry-standard diode orientation conventions and enables rapid visual verification during manual inspection and automated optical recognition (AOI) in SMT assembly lines.
T4F30AHM3/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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- 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)
T4F30AHM3/H FAQ
1.How can I place an order for T4F30AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F30AHM3/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 T4F30AHM3/H reliable?
The price and inventory of T4F30AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F30AHM3/H is usually 5 days.
3.What payment methods are accepted for T4F30AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F30AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F30AHM3/H?
T4F30AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F30AHM3/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 T4F30AHM3/H?
For technical support, including T4F30AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F30AHM3/H requirements.
6.How does Aetrix verify that T4F30AHM3/H is sourced from the original manufacturer or authorized distributors?
All T4F30AHM3/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 T4F30AHM3/H meets industry standards.
7.What is the process for return or replacement of T4F30AHM3/H?
All T4F30AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T4F30AHM3/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 T4F30AHM3/H part is unused and in its original packaging.
Return procedure for T4F30AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T4F30AHM3/H Tags
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