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Vishay General Semiconductor - Diodes Division T4F22AHM3/I
- Part No.:
- T4F22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F22AHM3/I.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
T4F22AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMF (DO-219AB) package, rated for 22.0 V nominal breakdown voltage (VBR), 18.8 V stand-off voltage (VWM), 30.6 V maximum clamping voltage (VC) at 13.1 A peak pulse current, and 400 W peak pulse power with 10/1000 μs waveform - designed for automotive sensor signal line protection under high-reliability, high-temperature conditions.
For engineers reviewing the T4F22AHM3/I datasheet, T4F22AHM3/I pinout, T4F22AHM3/I application, or T4F22AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C capability, unidirectional polarity, low-profile SOD-123W-compatible SMF package, and verified clamping performance in automotive transients.
Technical Context
This device operates as a unidirectional TVS diode optimized for fast transient suppression on sensitive signal lines. Its passivated anisotropic rectifier technology ensures stable VBR drift (αT = 0.084 %/°C) and low leakage (<1 μA at VWM) up to 150 °C junction temperature.
It delivers 400 W peak pulse power per 10/1000 μs waveform with thermal resistance RthJA ≤ 160 °C/W on FR4 PCB, enabling robust surge handling in compact automotive ECUs and sensor modules where space and thermal margin are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 22.0 V - precise breakdown threshold ensuring reliable triggering before downstream IC damage |
| VWM | 18.8 V - maximum continuous reverse operating voltage compatible with 12 V automotive supply rails |
| VC @ IPPM | 30.6 V - clamping voltage at 13.1 A limits stress on protected circuitry during ISO 7637-2 pulses |
| PPPM | 400 W - peak pulse power rating validated for 10/1000 μs transients per IEC 61000-4-5 |
| TJ max. | 185 °C - enables operation in under-hood environments without derating loss |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling and HTRB |
| Package | SMF (DO-219AB) - low-profile, halogen-free, RoHS-compliant surface-mount case with cathode band marking |
Pinout & Package
Package: SMF (DO-219AB), 2-terminal surface-mount device with matte tin-plated leads, cathode denoted by color band. Compatible with SOD-123W footprint per JEDEC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or low-impedance reference; forms low-inductance discharge path with cathode |
| Cathode | Transient voltage input node | Connected to protected signal line; absorbs positive-going surges relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stable VBR drift (0.084 %/°C) and <1 μA leakage at 150 °C enable long-term reliability in hot environments |
| TJ = 185 °C capability | Eliminates thermal derating in engine control units and ADAS sensor housings exposed to ambient >125 °C |
| AEC-Q101 qualification | Validated for automotive use including HTGB, HTRB, and temperature cycling per stress test plan |
| 400 W peak pulse power | Withstands repeated ISO 7637-2 Pulse 1, 2a, and 5a transients without degradation |
| MSL Level 1 | Reflow-solderable at 260 °C peak without moisture-induced failure; no bake required pre-assembly |
Applications
| Automotive Sensor Signal Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting LIN/CAN sensor signal lines (e.g., crankshaft position, oxygen sensor) from load dump and inductive switching transients in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between signal line and chassis ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits clamped voltage to 30.6 V, preventing damage to 3.3 V or 5 V interface ICs while maintaining signal integrity below VWM = 18.8 V. | Use Scenario: Safeguarding ECU 12 V input rail against ISO 7637-2 Pulse 5a (load dump) events up to 60 V/100 ms. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted directly at connector entry point, shunting surge energy to ground. Use Value: Withstands 400 W peak pulse power and maintains <1 μA leakage at 18.8 V, avoiding parasitic drain in always-on vehicle networks. |
| ADAS Camera Module Interface | Body Control Module (BCM) LIN Bus |
Use Scenario: Shielding FPD-Link III or GMSL serial video interfaces in rear-view cameras from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with differential data pairs, referenced to local ground plane. Use Value: Clamps sub-100 ns ESD transients to <30.6 V without distorting high-speed video signals due to optimized junction design. | Use Scenario: Securing LIN bus physical layer in door modules and seat controllers against battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional T4F22AHM3/I used with series resistor to handle positive-only surges on LIN master/slave lines. Use Value: Leverages 185 °C rating to survive under-dash thermal environments while meeting LIN spec VWM margin requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Same VBR (22 V), but SMA package (DO-214AC); RthJA = 195 °C/W vs. 160 °C/W; lower PPPM derating above 75 °C | Less suitable for under-hood use above 125 °C ambient due to higher thermal resistance | Select T4F22AHM3/I when TJ > 150 °C operation or MSL Level 1 reflow is required |
| 1.5SMC22A | Higher PPPM (1500 W), but larger SMC (DO-214AB) package; VC = 33.2 V at 45.5 A; not AEC-Q101 qualified | Used in industrial power supplies, not automotive; lacks automotive qualification and high-temp stability | Select T4F22AHM3/I for AEC-Q101 compliance, compact layout, and guaranteed 185 °C operation |
Compared with SMAJ22A-E3/57T and 1.5SMC22A, the T4F22AHM3/I offers superior thermal performance in confined spaces, guaranteed automotive qualification, and tighter VBR tolerance - making it the preferred choice for next-generation automotive electronics where size, temperature, and reliability are co-constrained.
Availability
T4F22AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, ECU power input safeguarding, and ADAS camera interface hardening requiring stable component supply across production lifecycles.
Supply support for T4F22AHM3/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, MOSFETs, and TVS devices with emphasis on reliability, thermal performance, and automotive qualification.
The T4F22AHM3/I belongs to Vishay's PAR® family of high-temperature TVS diodes, engineered specifically for automotive signal and power line protection where AEC-Q101 compliance and 185 °C junction capability are mandatory.
FAQ
What is the breakdown voltage tolerance for T4F22AHM3/I?
The T4F22AHM3/I has a breakdown voltage (VBR) range of 20.9 V (min) to 23.1 V (max) at 1.0 mA test current, with 22.0 V nominal. This ±5% tolerance ensures consistent clamping behavior across production lots and supports robust design margins for 12 V automotive systems where VWM = 18.8 V provides adequate headroom.
Is T4F22AHM3/I suitable for bidirectional transient protection?
No, the T4F22AHM3/I is unidirectional only. It protects against positive-going transients relative to the anode (ground). For bidirectional protection - such as AC lines or data buses subject to both polarities - a separate bidirectional TVS like SMBJ22CA would be required. The T4F22AHM3/I datasheet explicitly states "Unidirectional only" in its features section.
Does T4F22AHM3/I meet lead-free and RoHS requirements?
Yes, the T4F22AHM3/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and qualified to JESD201 Class 2 whisker resistance. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102 solderability standards, and the molding compound meets UL 94 V-0 flammability rating.
What is the maximum clamping voltage of T4F22AHM3/I at rated peak pulse current?
The T4F22AHM3/I has a maximum clamping voltage (VC) of 30.6 V at 13.1 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. 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.
Can T4F22AHM3/I be used in reflow soldering processes?
Yes, the T4F22AHM3/I is fully compatible with standard reflow soldering, rated for maximum peak temperature of 260 °C per J-STD-020. It meets MSL Level 1, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly - simplifying manufacturing logistics for high-volume automotive production.
T4F22AHM3/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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
T4F22AHM3/I FAQ
1.How can I place an order for T4F22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F22AHM3/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 T4F22AHM3/I reliable?
The price and inventory of T4F22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F22AHM3/I is usually 5 days.
3.What payment methods are accepted for T4F22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F22AHM3/I?
T4F22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F22AHM3/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 T4F22AHM3/I?
For technical support, including T4F22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F22AHM3/I requirements.
6.How does Aetrix verify that T4F22AHM3/I is sourced from the original manufacturer or authorized distributors?
All T4F22AHM3/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 T4F22AHM3/I meets industry standards.
7.What is the process for return or replacement of T4F22AHM3/I?
All T4F22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T4F22AHM3/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 T4F22AHM3/I part is unused and in its original packaging.
Return procedure for T4F22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T4F22AHM3/I Tags
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