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Vishay T15B51AHM3/H
- Part No.:
- T15B51AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B51AHM3/H.pdf
- Description:
- 1.5KW,51V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
T15B51AHM3/H 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 70.1 V under 22.1 A surge current, and operates up to +185 °C junction temperature in SMB (DO-214AA) package.
For engineers reviewing the T15B51AHM3/H datasheet, T15B51AHM3/H pinout, T15B51AHM3/H application, or T15B51AHM3/H equivalent, key selection criteria include its 43.6 V stand-off voltage, AEC-Q101 qualification, MSL Level 1 rating, 30 kV ESD immunity per IEC 61000-4-2, and halogen-free HM3 construction.
Technical Context
The T15B51AHM3/H employs passivated anisotropic rectifier technology optimized for stable clamping under repetitive transients. Its breakdown voltage is specified at 48.5–53.6 V (min–max) with 1 mA test current, and it exhibits a typical temperature coefficient of +0.093 %/°C for VBR.
Designed for unidirectional operation, it features a cathode-band polarity marker and meets JESD 201 Class 2 whisker resistance. The device sustains 22.1 A peak pulse current (10/1000 μs) while limiting reverse voltage to ≤70.1 V, enabling robust protection of 48 V automotive signal lines and MOSFET gates against lightning-induced surges and inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR (min–max) | 48.5–53.6 V at 1 mA - ensures reliable triggering above system nominal voltage |
| VC @ IPPM | 70.1 V at 22.1 A - clamping level that protects downstream 75 V-rated ICs |
| PPPM | 1500 W (10/1000 μs) - handles automotive load-dump and ISO 7637-2 pulse 5a energy |
| TJ max | +185 °C - supports under-hood placement without derating in engine control units |
| ESD immunity | ±30 kV contact/air (IEC 61000-4-2) - eliminates need for additional ESD diodes on sensor interfaces |
| Package | SMB (DO-214AA) - industry-standard footprint compatible with automated SMT assembly |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe ISO 7637-2 Pulse 5a transients in 48 V architectures |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and ADAS modules requiring zero field failure |
| MSL Level 1 (260 °C peak) | Allows direct placement on PCBs without moisture-sensitive handling or baking prior to reflow |
| 185 °C junction rating | Permits operation adjacent to power converters and motor drivers without thermal derating |
| 30 kV ESD immunity | Meets stringent EMC requirements for CAN FD, LIN, and sensor signal lines in vehicle networks |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 48 V DC Power Distribution |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver pins from load dump and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps 70.1 V at 22.1 A, ensuring downstream 5 V/3.3 V logic remains within absolute maximum ratings during 1500 W surges. | Use Scenario: Safeguarding programmable logic controller (PLC) analog input channels connected to 48 V field sensors. IC Role / Device Role / Timing Role: Standoff protection element on 4–20 mA loop inputs, rated for continuous 43.6 V operation. Use Value: Maintains <1 μA leakage at 43.6 V, preventing measurement drift while responding in <1 ns to fast-rising transients. |
| Automotive Radar Sensor Module | Server PSU Front-End Protection |
Use Scenario: Shielding RF front-end LNA bias lines and digital interface traces (e.g., SPI, I²C) from ESD and coupling noise. IC Role / Device Role / Timing Role: Localized TVS on high-speed signal paths near radar SoC, leveraging low capacitance and fast response. Use Value: 30 kV IEC 61000-4-2 immunity prevents latch-up or parametric shift in millimeter-wave sensor ICs. | Use Scenario: Secondary-side overvoltage suppression on 48 V intermediate bus rails feeding server ASICs and memory modules. IC Role / Device Role / Timing Role: Bulk transient suppressor mounted at board edge, coordinated with upstream MOVs and fuses. Use Value: 1500 W rating absorbs residual energy after primary-stage clamping, reducing stress on point-of-load regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-E3/52 (Vishay) | Same SMB package, 51 V VBR, but lower PPPM = 600 W and no AEC-Q101 qualification | Rated for commercial/industrial use only; not validated for automotive temperature cycling or humidity testing | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary |
| 1.5SMC51A (ON Semiconductor) | Same 51 V VBR range, 1500 W rating, but SMB package with different mechanical tolerances and no JESD 201 Class 2 whisker test | Lacks AEC-Q101 and MSL Level 1 certification; requires moisture bake before reflow | Acceptable for non-automotive industrial designs where full automotive compliance is not mandated |
Compared with SMBJ51A-E3/52 and 1.5SMC51A, the T15B51AHM3/H uniquely combines AEC-Q101 qualification, 185 °C operation, MSL Level 1, and 30 kV ESD in a single SMB device-making it the only choice for under-hood automotive signal line protection where reliability and process compatibility are non-negotiable.
Availability
T15B51AHM3/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial 48 V power distribution systems, and radar sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for T15B51AHM3/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade performance.
The T15B51AHM3/H belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for harsh-environment transient suppression in automotive powertrain, chassis, and ADAS systems.
FAQ
What is the maximum clamping voltage of the T15B51AHM3/H under peak surge conditions?
The T15B51AHM3/H has a maximum clamping voltage (VC) of 70.1 V when subjected to its rated peak pulse current of 22.1 A using a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 98360) and defines the upper voltage limit imposed on protected circuits during worst-case transients. Engineers must verify that this clamping level remains below the absolute maximum ratings of downstream components such as microcontrollers or transceivers. The T15B51AHM3/H maintains this performance across its full operating temperature range.
Is the T15B51AHM3/H qualified for automotive applications?
Yes, the T15B51AHM3/H is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and radar sensors. It also meets MSL Level 1 per J-STD-020 (peak reflow temperature 260 °C), passes JESD 201 Class 2 whisker testing, and operates reliably from –65 °C to +185 °C. These qualifications are explicitly stated in the Vishay datasheet for the T15B51AHM3/H and verified through third-party test reports referenced in Document Number 98360.
What does the "HM3" suffix indicate in T15B51AHM3/H?
The "HM3" suffix in T15B51AHM3/H denotes a halogen-free, RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards. The "H" in the full suffix "HM3/H" specifies packaging in 7″ diameter plastic tape and reel (750 units per reel). This variant is fully AEC-Q101 qualified and rated for MSL Level 1, distinguishing it from non-HM3 versions that may lack automotive compliance or lead finish specifications.
How does the T15B51AHM3/H compare to standard SMBJ series TVS diodes?
The T15B51AHM3/H provides 1500 W peak pulse power-2.5× higher than the 600 W rating of the SMBJ51A-while maintaining identical SMB (DO-214AA) footprint and 51 V breakdown range. Unlike standard SMBJ devices, the T15B51AHM3/H is AEC-Q101 qualified, rated for 185 °C operation, and certified to MSL Level 1. These enhancements make the T15B51AHM3/H suitable for under-hood automotive deployment where the SMBJ51A would require derating or supplemental thermal design. Both share cathode-band polarity and unidirectional behavior.
What is the reverse leakage current specification for the T15B51AHM3/H at maximum operating temperature?
At its maximum junction temperature of +185 °C and rated stand-off voltage (VWM = 43.6 V), the T15B51AHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 μA. This value is confirmed in the Vishay Electrical Characteristics table (Document Number 98360, page 2) and reflects stable performance under extreme thermal stress-critical for protecting precision analog inputs in automotive and industrial environments. At room temperature (25 °C), leakage is ≤1.0 μA at VWM, ensuring minimal impact on sensor bias networks or high-impedance signal paths.
T15B51AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- 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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 22.1A
- 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)
T15B51AHM3/H FAQ
1.How can I place an order for T15B51AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B51AHM3/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 T15B51AHM3/H reliable?
The price and inventory of T15B51AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B51AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B51AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B51AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B51AHM3/H?
T15B51AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B51AHM3/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 T15B51AHM3/H?
For technical support, including T15B51AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B51AHM3/H requirements.
6.How does Aetrix verify that T15B51AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B51AHM3/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 T15B51AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B51AHM3/H?
All T15B51AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B51AHM3/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 T15B51AHM3/H part is unused and in its original packaging.
Return procedure for T15B51AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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