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Vishay General Semiconductor - Diodes Division T15B27AHM3/I
- Part No.:
- T15B27AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B27AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
T15B27AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-reliability automotive and industrial electronics protection. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 37.5 V under 41.3 A surge current, and operates up to 185 °C junction temperature in SMB (DO-214AA) package.
For engineers reviewing the T15B27AHM3/I datasheet, T15B27AHM3/I pinout, T15B27AHM3/I application, or T15B27AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, 27 V nominal breakdown voltage, 23.1 V stand-off voltage, <1.0 μA reverse leakage at VWM, and MSL Level 1 reflow compatibility.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across -65 °C to +185 °C operating range. Its unidirectional architecture provides low dynamic impedance and fast response time to suppress transients induced by inductive load switching or ESD events.
The device meets IEC 61000-4-2 with ±30 kV contact/air discharge immunity and is rated for 1500 W peak pulse power per 10/1000 μs waveform. Its TJ = 185 °C capability supports under-hood automotive environments where thermal derating must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 / 27.0 / 28.4 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 23.1 V - maximum continuous reverse working voltage compatible with 24 V automotive systems |
| IPPM | 41.3 A - peak surge current handling capacity under standardized 10/1000 μs waveform |
| VC | 37.5 V - clamping voltage at IPPM, limiting downstream IC stress during transient events |
| PPPM | 1500 W - robust energy absorption capability for lightning and load-dump surges |
| TJ max | +185 °C - enables operation in high-temperature engine bay or powertrain control units |
| ESD immunity | ±30 kV (IEC 61000-4-2) - protects sensor signal lines and microcontroller I/O against static discharge |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VBR exceeded |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR over lifetime and temperature cycling |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body control, and ADAS modules |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without moisture-induced failure |
| Low leakage at VWM | <1.0 μA at 23.1 V - minimizes standby power loss in always-on vehicle networks |
| High-temperature stability | 0.087 %/°C tempco of VBR enables predictable clamping across full operating range |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in junction boxes and fuse panels from load dump and alternator transients. IC Role / Device Role / Timing Role: Standoff TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps to 37.5 V at 41.3 A, preventing overvoltage damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog and CAN signal lines of pressure/temperature sensors in harsh factory environments. IC Role / Device Role / Timing Role: Unidirectional TVS on each signal trace, referenced to local ground plane. Use Value: Sub-1 ns response time and ±30 kV ESD immunity preserve signal integrity and prevent latch-up in precision ADC front-ends. |
| Motor Drive Gate Driver Protection | Onboard Charger Input Stage |
Use Scenario: Safeguarding high-side MOSFET gate drivers in BLDC inverters from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS placed between gate and source, absorbing Miller-induced transients. Use Value: 185 °C junction rating allows placement near heat-generating power stages without derating. | Use Scenario: Front-end surge suppression for AC/DC converters in EV onboard chargers exposed to grid transients. IC Role / Device Role / Timing Role: Primary-side unidirectional TVS on rectified DC bus before PFC stage. Use Value: 1500 W peak power rating handles 10/1000 μs surges per IEC 61000-4-5 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same SMB package, 27 V VBR, but 600 W PPPM (10/1000 μs) | Limited to lower-energy transients; not rated for automotive under-hood thermal profiles | Select when cost sensitivity outweighs peak surge requirement and ambient temperature stays below 125 °C |
| 1.5KE27A | Through-hole DO-201 package, same 27 V VBR, 1500 W rating, but no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive qualification programs | Choose only for legacy through-hole designs or non-automotive industrial use where reflow compatibility is irrelevant |
Compared with SMBJ27A and 1.5KE27A, the T15B27AHM3/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, SMB footprint, and 185 °C operation-enabling single-source compliance for next-generation automotive electronics requiring both high energy absorption and extended thermal margin.
Availability
T15B27AHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, motor drive gate driver protection, and onboard charger input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for T15B27AHM3/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 application-specific performance.
The T15B27AHM3/I belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for automotive-grade transient suppression where thermal stability, AEC-Q101 compliance, and consistent clamping behavior are critical.
FAQ
What is the breakdown voltage tolerance for T15B27AHM3/I?
The T15B27AHM3/I has a specified breakdown voltage range of 25.7 V (min) to 28.4 V (max) at 1.0 mA test current, with 27.0 V nominal. This ±5% tolerance ensures predictable turn-on behavior across production lots and temperature extremes, critical for protecting 24 V automotive systems without nuisance conduction during normal operation.
Is T15B27AHM3/I suitable for 48 V mild-hybrid vehicle applications?
No - the T15B27AHM3/I is rated for 23.1 V stand-off voltage (VWM) and 27 V nominal breakdown, making it appropriate for 24 V systems. For 48 V architectures, higher-voltage variants such as T15B47AHM3/I (VWM = 40.2 V) are required to maintain adequate margin above nominal bus voltage.
Does T15B27AHM3/I require derating at elevated ambient temperatures?
Yes - the T15B27AHM3/I must be derated per Figure 2 in the datasheet. At 125 °C ambient, its 1500 W peak pulse power drops to approximately 750 W. Engineers must apply this derating when designing for under-hood locations or enclosed enclosures where sustained high ambient temperatures occur.
What does the "HM3" suffix indicate in T15B27AHM3/I?
"HM3" denotes halogen-free, RoHS-compliant construction with matte tin-plated leads, JESD 201 Class 2 whisker resistance, and AEC-Q101 qualification. The "I" suffix specifies packaging in 13-inch tape-and-reel format with 3200 units per reel - optimized for high-volume SMT assembly lines.
Can T15B27AHM3/I replace bidirectional TVS diodes in signal-line protection?
No - the T15B27AHM3/I is unidirectional and intended for DC power rail protection. Bidirectional signal-line protection requires symmetrical clamping (e.g., SMBJ27CA). Using T15B27AHM3/I on AC-coupled or differential data lines risks forward conduction and signal distortion during negative excursions.
T15B27AHM3/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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- 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)
T15B27AHM3/I FAQ
1.How can I place an order for T15B27AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B27AHM3/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 T15B27AHM3/I reliable?
The price and inventory of T15B27AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B27AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B27AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B27AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B27AHM3/I?
T15B27AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B27AHM3/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 T15B27AHM3/I?
For technical support, including T15B27AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B27AHM3/I requirements.
6.How does Aetrix verify that T15B27AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B27AHM3/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 T15B27AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B27AHM3/I?
All T15B27AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B27AHM3/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 T15B27AHM3/I part is unused and in its original packaging.
Return procedure for T15B27AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B27AHM3/I Tags
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