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Vishay General Semiconductor - Diodes Division T4F22AHM3/H
- Part No.:
- T4F22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
T4F22AHM3/H.pdf
- Description:
- LOW PROFILE OF 400W PAR TVS PROD
- Quantity:
- Payment:
- Shipping:
Inventory:21,100
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Product details
Overview
T4F22AHM3/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 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, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - deployed on sensor signal lines and MOSFET gate drivers in engine control units.
For engineers reviewing the T4F22AHM3/H datasheet, T4F22AHM3/H pinout, T4F22AHM3/H application, or T4F22AHM3/H equivalent, this page delivers verified electrical specs, SMF (DO-219AB) package details, AEC-Q101 qualification status, thermal derating curves, and direct alternatives for automotive ESD/surge protection design-in.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable clamping under high-temperature transients. Its unidirectional configuration enables precise reverse-biased surge suppression without forward conduction during normal operation.
The device complies with AEC-Q101 stress testing for automotive reliability and meets J-STD-020 MSL Level 1 (260 °C peak reflow), supporting wave and reflow soldering on FR4 PCBs with standard 2 oz. copper pads per JEDEC 51-2A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (nom) | 22.0 V - ensures reliable triggering above 18.8 V system operating voltage while avoiding false trips |
| VC @ IPPM | 30.6 V - clamps induced surges to safe levels for downstream 3.3 V/5 V logic and analog ICs |
| IPPM | 13.1 A - sustains 10/1000 µs lightning-induced transients per ISO 7637-2 Pulse 1/2b |
| PPPM | 400 W - provides robust protection against repetitive load-dump and inductive switching events |
| TJ max | +185 °C - supports under-hood placement in engine management and transmission control modules |
| Package | SMF (DO-219AB) - low-profile 2.9 mm × 1.3 mm footprint compatible with automated SMT assembly |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMF (DO-219AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Cathode indicated by color band. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or low-side return path; defines polarity of transient shunting path |
| Cathode | Protected line connection point | Connected to signal/power line requiring protection; conducts surge current to ground when VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous operation up to +185 °C junction temperature, enabling placement near heat sources in automotive ECUs |
| Low-profile SMD package | SMF (DO-219AB) footprint (2.9 mm × 1.3 mm) saves board space vs. SMA/SMB while maintaining 400 W capability |
| Stable clamping performance | 0.084 %/°C temperature coefficient of VBR ensures predictable trip voltage across full automotive temperature range |
| AEC-Q101 qualification | Validated for automotive use via HTGB, HTRB, TCT, and ESD testing - reduces qualification burden for Tier 1 suppliers |
Applications
| Automotive Sensor Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., oxygen, knock, MAP sensors) from ESD and load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp fast-rising transients before they reach sensitive input stages. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining signal integrity below 18.8 V operating threshold. | Use Scenario: Safeguarding 12 V supply rails feeding microcontrollers and power regulators in engine control modules exposed to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary clamping device on main power input, absorbing up to 400 W for 1000 µs to limit rail overshoot to ≤30.6 V. Use Value: Enables use of lower-voltage-rated downstream components (e.g., 36 V LDOs) without oversized input capacitors or secondary protection. |
| MOSFET Gate Driver Protection | Body Control Module (BCM) Signal Lines |
Use Scenario: Shielding high-side/low-side gate drivers in motor control circuits from inductive kickback during PWM switching of solenoids or fuel injectors. IC Role / Device Role / Timing Role: Fast-response TVS connected between gate and source pins to suppress dv/dt-induced spikes before driver IC inputs exceed absolute maximum ratings. Use Value: Eliminates need for external RC snubbers while maintaining <1 ns response time and preserving PWM timing accuracy. | Use Scenario: Hardening LIN, PWM dimming, and wake-up signal lines in door modules and lighting controllers against cable discharge and battery reversal events. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA at VWM) unidirectional suppressor placed inline with signal traces to prevent false wake-ups or communication errors. Use Value: Maintains <5 µA total standby current budget while providing 13.1 A surge current handling for 10/1000 µs pulses. |
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-HF | Same VBR (22 V), but SMA package (DO-214AC); RthJA = 140 °C/W vs. 160 °C/W for T4F22AHM3/H; 1.5 kW peak power rating | Higher power handling but larger footprint (4.5 mm × 2.7 mm); less suitable for dense automotive PCB layouts | Select when higher single-pulse energy absorption is required and board space permits larger package |
| 1.5KE22A | Through-hole DO-201 package; 1500 W peak power; VC = 33.2 V at 45.5 A; no AEC-Q101 qualification | Not qualified for automotive use; requires manual or wave soldering; unsuitable for automated SMT production | Consider only for non-automotive industrial prototypes where cost outweighs reliability and assembly constraints |
Compared with SMAJ22A-HF and 1.5KE22A, the T4F22AHM3/H delivers AEC-Q101 compliance, tighter thermal resistance (RthJM = 18 °C/W), and a compact SMF footprint - making it optimal for production automotive systems requiring zero-defect SMT yield and under-hood thermal resilience.
Availability
T4F22AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, engine control unit (ECU) power input hardening, and MOSFET gate driver surge suppression requiring stable component supply across multi-year vehicle production cycles.
Supply support for T4F22AHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The T4F22AHM3/H belongs to the eSMP® Series PAR® TVS family, engineered specifically for automotive-grade transient suppression in space-constrained, thermally demanding environments such as powertrain and chassis control modules.
FAQ
What is the maximum clamping voltage of the T4F22AHM3/H at its rated peak pulse current?
The T4F22AHM3/H has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current (IPPM) of 13.1 A under a 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet 87645 and ensures protected circuits remain within safe operating limits during surge events. The T4F22AHM3/H maintains this clamping performance across its full -65 °C to +185 °C operating junction temperature range.
Is the T4F22AHM3/H qualified for automotive applications?
Yes, the T4F22AHM3/H is AEC-Q101 qualified, having passed all required stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and ESD. It is explicitly rated for automotive use in the Vishay datasheet 87645 and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and whisker-tested construction. The T4F22AHM3/H is intended for deployment in engine control units, body control modules, and ADAS sensor interfaces.
What is the thermal resistance from junction to ambient (RthJA) for the T4F22AHM3/H?
The T4F22AHM3/H has a maximum junction-to-ambient thermal resistance (RthJA) of 160 °C/W when mounted on a standard FR4 PCB with 2 oz. copper per JEDEC 51-2A. Its typical RthJA is 135 °C/W. This value assumes recommended footprint dimensions per the DO-219AB outline drawing. The T4F22AHM3/H also achieves a low junction-to-mount thermal resistance (RthJM) of 18 °C/W, critical for sustained power dissipation in high-temperature automotive locations.
Does the T4F22AHM3/H have a bidirectional configuration option?
No, the T4F22AHM3/H is unidirectional only, as confirmed in the Vishay datasheet 87645 under FEATURES and PRIMARY CHARACTERISTICS. It is designed for applications where the protected line operates at a fixed DC potential relative to ground and requires clamping only during reverse-polarity transients. For bidirectional protection, Vishay offers separate part numbers in the same family (e.g., T4F22A**D**) - the T4F22AHM3/H itself does not support symmetrical clamping.
What is the leakage current specification for the T4F22AHM3/H at its stand-off voltage?
The T4F22AHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 18.8 V, measured at 25 °C. At elevated temperature (TJ = 150 °C), leakage remains ≤5.0 µA under the same VWM condition. This low leakage ensures minimal impact on battery drain in always-on automotive circuits and preserves signal integrity on high-impedance sensor lines. The T4F22AHM3/H maintains this performance across its full operational temperature range.
T4F22AHM3/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):
- 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/H FAQ
1.How can I place an order for T4F22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T4F22AHM3/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 T4F22AHM3/H reliable?
The price and inventory of T4F22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4F22AHM3/H is usually 5 days.
3.What payment methods are accepted for T4F22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4F22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4F22AHM3/H?
T4F22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4F22AHM3/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 T4F22AHM3/H?
For technical support, including T4F22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4F22AHM3/H requirements.
6.How does Aetrix verify that T4F22AHM3/H is sourced from the original manufacturer or authorized distributors?
All T4F22AHM3/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 T4F22AHM3/H meets industry standards.
7.What is the process for return or replacement of T4F22AHM3/H?
All T4F22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T4F22AHM3/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 T4F22AHM3/H part is unused and in its original packaging.
Return procedure for T4F22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T4F22AHM3/H Tags
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