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Vishay General Semiconductor - Diodes Division T15B18AHM3/I
- Part No.:
- T15B18AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B18AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
T15B18AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive-grade overvoltage protection of sensitive electronics. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 25.5 V under 60.8 A surge, and operates up to +185 °C junction temperature in SMB (DO-214AA) package - deployed on signal lines of automotive sensor units and MOSFET gate drivers.
For engineers reviewing the T15B18AHM3/I datasheet, T15B18AHM3/I pinout, T15B18AHM3/I application, or T15B18AHM3/I equivalent, key selection criteria include breakdown voltage (17.1–18.9 V), clamping performance at rated IPPM, AEC-Q101 qualification, MSL Level 1 reflow compatibility, and thermal stability across -65 °C to +185 °C.
Technical Context
The T15B18AHM3/I employs passivated anisotropic rectifier technology to achieve fast response time and stable clamping under repetitive transients. Its unidirectional architecture provides low-leakage reverse blocking (≤1.0 µA at 15.3 V, 25 °C) and robust ESD immunity (30 kV contact/air per IEC 61000-4-2).
Designed for high-reliability automotive environments, it supports operation at TJ = 185 °C and meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements. The SMB package enables compact PCB layout while maintaining thermal derating capability per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable conduction onset above system stand-off voltage without premature triggering |
| VWM | 15.3 V - maximum continuous reverse working voltage compatible with 12 V automotive supply rails |
| VC @ IPPM | 25.5 V - clamping voltage during 60.8 A 10/1000 µs surge, limiting downstream device stress |
| PPPM | 1500 W - peak pulse power handling for lightning and load-switching transients per IEC 61000-4-5 |
| TJ max | +185 °C - enables under-hood deployment without thermal derating in engine control modules |
| ESD Rating | ±30 kV (IEC 61000-4-2) - protects CAN/LIN bus nodes and sensor interfaces from static discharge |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002/JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Cathode of internal PN junction | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling and humidity |
| High-temperature operation | Rated for continuous use at +185 °C junction temperature, supporting under-hood automotive placement |
| Fast response time | Sub-nanosecond turn-on enables suppression before IC damage occurs during ESD or switching events |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak, eliminating pre-bake requirements |
| Halogen-free & RoHS | HM3 suffix confirms compliance with environmental standards and automotive material categorization (Doc. 99912) |
Applications
| Automotive Sensor Signal Protection | 12 V Power Rail Clamping |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: TVS diode placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Maintains signal integrity by limiting voltage excursions to ≤25.5 V during 60.8 A surges, preventing ADC saturation or latch-up. | Use Scenario: Safeguarding 12 V supply inputs to infotainment head units and body control modules against ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VCC and GND to absorb positive-going spikes on main power rail. Use Value: Withstands 1500 W peak power without degradation, preserving regulator input stage integrity during cold-crank and load-dump events. |
| MOSFET Gate Driver Protection | CAN Bus Node Protection |
Use Scenario: Shielding high-side/low-side gate drivers in electric power steering (EPS) motor controllers from inductive kickback. IC Role / Device Role / Timing Role: TVS placed across driver output and ground to clamp voltage spikes induced by motor winding commutation. Use Value: Fast response and low clamping voltage (25.5 V) prevent gate oxide breakdown in 40 V-rated MOSFETs during 10/1000 µs transients. | Use Scenario: Adding secondary-level ESD protection to CANH/CANL lines in telematics control units near connector entry points. IC Role / Device Role / Timing Role: Unidirectional TVS on each differential line referenced to chassis ground to absorb ±30 kV contact discharge. Use Value: Meets IEC 61000-4-2 Level 4 without degrading signal rise/fall times due to low junction capacitance (<100 pF at 0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same SMB package, 18 V VBR, but lower PPPM = 600 W and no AEC-Q101 qualification | Not qualified for automotive; suitable for industrial/commercial grade only | Select when AEC-Q101 is not required and surge energy is limited to <600 W |
| TPSMA6L18A | Same 18 V VBR, 1500 W rating, AEC-Q101 qualified, but SMBG (DO-214AB) package with larger footprint | Requires PCB layout change; higher thermal mass may improve sustained pulse handling | Choose when board space allows larger package and enhanced thermal margin is prioritized |
Compared with SMBJ18A and TPSMA6L18A, the T15B18AHM3/I uniquely combines AEC-Q101 qualification, 1500 W capability, and SMB (DO-214AA) footprint - enabling drop-in replacement in space-constrained automotive designs requiring full compliance and high-energy clamping.
Availability
T15B18AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, 12 V power rail clamping, and MOSFET gate driver safeguarding requiring stable component supply and full AEC-Q101 traceability.
Supply support for T15B18AHM3/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-grade performance.
The T15B18AHM3/I belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for harsh-environment automotive electronics where thermal stability, ESD robustness, and long-term parametric consistency are critical.
FAQ
What is the breakdown voltage range of the T15B18AHM3/I?
The T15B18AHM3/I has a guaranteed breakdown voltage range of 17.1 V (min) to 18.9 V (max) at 1.0 mA test current, with a nominal value of 18.0 V. This tight VBR tolerance ensures predictable turn-on behavior in automotive 12 V systems, and the parameter is validated per ANSI/IEEE C62.35 standards with temperature coefficient αT = 0.080 %/°C.
Is the T15B18AHM3/I qualified for automotive applications?
Yes, the T15B18AHM3/I is AEC-Q101 qualified and rated for operation from -65 °C to +185 °C junction temperature. Its HM3 suffix confirms halogen-free, RoHS-compliant construction and JESD201 Class 2 whisker resistance - all verified per Vishay's qualification report for the T15BxxA series, making it suitable for engine control, ADAS, and body electronics.
What is the clamping voltage of the T15B18AHM3/I at its rated peak pulse current?
The T15B18AHM3/I clamps to a maximum of 25.5 V at its rated peak pulse current of 60.8 A (10/1000 µs waveform). This clamping performance is measured under standardized test conditions and ensures downstream components such as microcontrollers or transceivers remain within safe operating voltage limits during surge events.
Does the T15B18AHM3/I meet industry ESD immunity standards?
Yes, the T15B18AHM3/I meets IEC 61000-4-2 with ±30 kV contact discharge and ±30 kV air discharge ratings. This level of ESD immunity is confirmed in Vishay's immunity test report for the T15BxxA family and supports robust protection for automotive sensor interfaces, LIN/CAN transceivers, and other exposed signal paths.
What packaging and reel options are available for the T15B18AHM3/I?
The T15B18AHM3/I is supplied in 13-inch plastic tape and reel format with a base quantity of 3200 units per reel (package code "I"). It uses SMB (DO-214AA) packaging with matte tin-plated leads, MSL Level 1 rating, and complies with J-STD-002 solderability standards - enabling direct placement into high-volume SMT assembly lines without pre-baking.
T15B18AHM3/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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 60.8A
- 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)
T15B18AHM3/I FAQ
1.How can I place an order for T15B18AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B18AHM3/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 T15B18AHM3/I reliable?
The price and inventory of T15B18AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B18AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B18AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B18AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B18AHM3/I?
T15B18AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B18AHM3/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 T15B18AHM3/I?
For technical support, including T15B18AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B18AHM3/I requirements.
6.How does Aetrix verify that T15B18AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B18AHM3/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 T15B18AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B18AHM3/I?
All T15B18AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B18AHM3/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 T15B18AHM3/I part is unused and in its original packaging.
Return procedure for T15B18AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B18AHM3/I Tags
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