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Vishay General Semiconductor - Diodes Division T15B20AHM3/I
- Part No.:
- T15B20AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B20AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,200
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Product details
Overview
T15B20AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive-grade circuit protection. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 27.7 V under 56.0 A surge current, and operates with 20.0 V breakdown voltage (min), 21.0 V (max), and 17.1 V stand-off voltage - protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges.
For engineers reviewing the T15B20AHM3/I datasheet, T15B20AHM3/I pinout, T15B20AHM3/I application, or T15B20AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C junction rating, SMB (DO-214AA) package compatibility, and verified clamping performance under 10/1000 μs waveform conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping across temperature extremes. Its unidirectional polarity and 17.1 V stand-off voltage enable reliable operation in DC-biased automotive power rails and sensor interfaces without reverse leakage issues at rated voltage.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports 30 kV ESD immunity (IEC 61000-4-2), and maintains specified electrical characteristics over -65 °C to +185 °C junction temperature range - confirming suitability for under-hood and ADAS module deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.0 V (nominal), 19.0–21.0 V range - ensures consistent breakdown initiation across production lots and temperature |
| VWM | 17.1 V - maximum continuous reverse voltage before significant leakage; compatible with 12 V automotive systems |
| IPPM | 56.0 A (10/1000 μs) - defines surge current handling capacity for transient suppression in power electronics |
| VC | 27.7 V - clamping voltage at IPPM; limits downstream voltage stress on protected ICs and MOSFETs |
| PPPM | 1500 W - peak pulse power rating confirms robustness against high-energy transients like load dump |
| TJ max | +185 °C - enables use in high-temperature engine compartments without derating penalties |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - exceeds automotive EMC requirements for human-body-model discharge events |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts during overvoltage to clamp voltage to VC |
| Anode | Reference return path | Typically tied to ground or low-impedance return; completes clamping loop during transient event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, body electronics, and ADAS sensors |
| Junction passivation | Stable VBR drift ≤0.082 %/°C ensures predictable clamping across temperature cycling |
| MSL Level 1 rating | Enables single-pass 260 °C reflow without popcorn or delamination risk in automated SMT assembly |
| 1500 W peak pulse power | Supports protection of 12 V CAN, LIN, and sensor supply rails against ISO 7637-2 Pulse 1/2/5a transients |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed power rails in infotainment and gateway modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 27.7 V. Use Value: Prevents damage to downstream PMICs and microcontrollers during alternator regulation failure events. | Use Scenario: Protecting analog sensor inputs (e.g., MAP, TPS) from inductive kickback in engine management systems. IC Role / Device Role / Timing Role: Standoff-rated TVS (17.1 V) placed at connector interface to shunt fast transients before reaching ADC front-end. Use Value: Maintains signal integrity and prevents latch-up in 3.3 V or 5 V sensor signal conditioning circuits. |
| ADAS Camera Module Interface | Body Control Module (BCM) Signal Line Protection |
Use Scenario: Guarding FPD-Link III or GMSL serial video interfaces against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) used on differential data pairs to limit voltage without distorting high-speed signals. Use Value: Preserves signal rise/fall times while meeting ISO 10605 330 Ω/150 pF ESD test compliance. | Use Scenario: Shielding LIN bus lines and door actuator drivers from relay-switching noise in vehicle body networks. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground to absorb negative-going transients. Use Value: Ensures uninterrupted communication during repeated solenoid activation cycles in harsh thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 (Vishay) | Same SMB package, 20 V VWM, but lower PPPM = 600 W and non-AEC-Q101 rated | Not qualified for automotive under-hood use; suitable only for industrial or consumer-grade boards | Select when cost sensitivity outweighs automotive qualification requirements and surge energy is below 600 W |
| 1.5SMC20A (ON Semiconductor) | Same 20 V VWM, SMB package, AEC-Q101 qualified, but VC = 32.4 V (higher than T15B20AHM3/I's 27.7 V) | Higher clamping voltage reduces margin for 3.3 V/5 V logic protection; better suited for 24 V systems | Choose when higher system voltage tolerance allows relaxed clamping, or when sourcing flexibility across multiple distributors is prioritized |
Compared with SMBJ20A-E3/52 and 1.5SMC20A, the T15B20AHM3/I provides superior clamping (27.7 V), full AEC-Q101 validation, and 1500 W surge capability - making it optimal for safety-critical 12 V automotive subsystems where voltage margin and reliability are non-negotiable.
Availability
T15B20AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input safeguarding, and ADAS camera interface surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for T15B20AHM3/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 protection devices with emphasis on high-reliability and automotive-grade performance.
The T15B20AHM3/I belongs to Vishay's PAR® TVS family, engineered specifically for high-temperature stability and repeatable clamping in automotive electronics exposed to extreme thermal and electrical stress.
FAQ
What is the maximum operating junction temperature for T15B20AHM3/I?
The T15B20AHM3/I has a maximum operating junction temperature of +185 °C, validated per AEC-Q101 stress testing. This rating allows deployment in under-hood applications such as engine control units and transmission control modules where ambient temperatures exceed 125 °C. The T15B20AHM3/I maintains specified VBR and clamping performance up to this limit without derating.
Is T15B20AHM3/I compliant with automotive reliability standards?
Yes, the T15B20AHM3/I is AEC-Q101 qualified and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow. It also passes IEC 61000-4-2 ±30 kV contact/air ESD testing. These certifications confirm its suitability for automotive powertrain, chassis, and ADAS systems where long-term field reliability is mandatory - unlike generic industrial TVS diodes.
What does the "HM3" suffix indicate in T15B20AHM3/I?
The "HM3" suffix in T15B20AHM3/I denotes halogen-free construction, RoHS compliance, AEC-Q101 qualification, and JESD 201 Class 2 whisker resistance. The "I" indicates packaging in 13-inch tape-and-reel format (3200 units per reel), optimized for high-volume SMT placement. This distinguishes it from "H"-suffixed variants shipped on 7-inch reels.
How does the clamping voltage of T15B20AHM3/I compare to its breakdown voltage?
The T15B20AHM3/I has a nominal breakdown voltage (VBR) of 20.0 V and a maximum clamping voltage (VC) of 27.7 V at 56.0 A (10/1000 μs). This 7.7 V differential represents the voltage overhead required to divert surge current while limiting stress on protected components - a critical design margin for safeguarding 3.3 V or 5 V logic interfaces downstream.
Can T15B20AHM3/I be used in bidirectional configurations?
No, the T15B20AHM3/I is strictly unidirectional, with cathode marked by a band and designed for DC-biased applications. It does not conduct in reverse bias beyond VWM = 17.1 V. For AC or bipolar signal line protection, a dedicated bidirectional TVS such as SMBJ20CA must be selected - the T15B20AHM3/I lacks symmetrical clamping capability and would fail under reverse surge conditions.
T15B20AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 56A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AA (SMB)
T15B20AHM3/I FAQ
1.How can I place an order for T15B20AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B20AHM3/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 T15B20AHM3/I reliable?
The price and inventory of T15B20AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B20AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B20AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B20AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B20AHM3/I?
T15B20AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B20AHM3/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 T15B20AHM3/I?
For technical support, including T15B20AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B20AHM3/I requirements.
6.How does Aetrix verify that T15B20AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B20AHM3/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 T15B20AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B20AHM3/I?
All T15B20AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B20AHM3/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 T15B20AHM3/I part is unused and in its original packaging.
Return procedure for T15B20AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B20AHM3/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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