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Vishay General Semiconductor - Diodes Division T15B51AHM3/I
- Part No.:
- T15B51AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B51AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,180
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Product details
Overview
T15B51AHM3/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 70.1 V under 22.1 A surge, and operates up to 185 °C junction temperature in SMB (DO-214AA) package. Used to safeguard MOSFETs, sensor signal lines, and ICs against lightning-induced transients and inductive switching spikes.
For engineers reviewing the T15B51AHM3/I datasheet, T15B51AHM3/I pinout, T15B51AHM3/I application, or T15B51AHM3/I equivalent, key selection criteria include its 43.6 V stand-off voltage, 48.5–53.6 V breakdown range, AEC-Q101 qualification, MSL Level 1 rating, and 30 kV IEC 61000-4-2 ESD immunity - all critical for robust automotive-grade transient suppression.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable clamping performance across temperature. Its unidirectional configuration enables precise reverse-biased overvoltage protection on DC power rails and signal paths where polarity is fixed.
Rated for TJ = −65 °C to +185 °C and qualified per AEC-Q101, it supports automotive under-hood and ADAS subsystems requiring long-term reliability under thermal stress. The 10/1000 μs waveform rating reflects real-world surge events such as load dump and ISO 7637-2 pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for safe DC bias in protected circuit. |
| VBR (min/typ/max) | 48.5 / 51.0 / 53.6 V - Breakdown occurs within this range at 1 mA test current; defines onset of clamping action. |
| VC @ IPPM | 70.1 V - Clamped voltage during 22.1 A 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; validates suitability for severe transient environments like automotive load dump. |
| TJ max | +185 °C - Enables operation in high-temperature zones (e.g., engine control units) without derating or failure. |
| ESD immunity | 30 kV contact/air (IEC 61000-4-2) - Ensures resilience against human-body-model and system-level electrostatic discharge events. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts transient energy to ground when voltage exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per JESD47 requirements. |
| 185 °C junction rating | Supports placement near heat sources (e.g., power converters) without thermal derating or lifetime degradation. |
| 1500 W 10/1000 μs pulse power | Handles high-energy transients common in 12 V/24 V vehicle electrical systems and industrial motor drives. |
| 30 kV ESD immunity | Eliminates need for additional ESD protection stages in sensor interfaces and communication ports. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) input rails from load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and ground to clamp surges above 43.6 V. Use Value: Limits peak voltage to 70.1 V during 22.1 A surge, preventing damage to upstream DC/DC controllers and monitoring ICs. | Use Scenario: Shielding analog output lines of pressure sensors in hydraulic control valves from ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and ground to absorb fast transients without distorting mV-level signals. Use Value: Maintains signal integrity with <1 μA leakage at 43.6 V and 30 kV ESD immunity per IEC 61000-4-2. |
| ADAS Camera Module Power Input | Motor Drive Gate Driver Supply Protection |
Use Scenario: Securing 12 V input to CMOS image sensor modules exposed to ignition noise and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera module's main power rail, positioned upstream of LDO regulators. Use Value: Withstands repeated 1500 W surges and operates reliably at 185 °C ambient, ensuring uptime in engine bay mounting. | Use Scenario: Guarding isolated gate driver supply (e.g., 15 V rail) in BLDC motor inverters against shoot-through-induced transients. IC Role / Device Role / Timing Role: Fast-response TVS suppressing sub-microsecond spikes generated by high-di/dt switching. Use Value: Clamps within nanoseconds to ≤70.1 V, preventing false triggering or latch-up in high-side gate drivers. |
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 rated for 600 W PPPM and not AEC-Q101 qualified. | Limited to commercial/industrial use; lacks automotive qualification and high-temperature margin. | Select when cost sensitivity outweighs AEC-Q101 and 185 °C requirements. |
| 1.5SMC51A (ON Semiconductor) | Same 51 V VBR, 1500 W rating, SMB package, but only rated to 175 °C TJ and not AEC-Q101 qualified. | Acceptable for non-automotive industrial controls but unsuitable for under-hood deployment. | Choose for legacy designs where 10 °C lower max junction temperature is acceptable. |
Compared with SMBJ51A-E3/52 and 1.5SMC51A, the T15B51AHM3/I provides verified AEC-Q101 compliance, +185 °C operation, and identical 51 V breakdown - making it the only option qualified for next-generation automotive power electronics requiring extended thermal and reliability margins.
Availability
T15B51AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and ADAS camera module design requiring stable component supply and long-term lifecycle support.
Supply support for T15B51AHM3/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 reliability, efficiency, and application-specific optimization.
The T15B51AHM3/I belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for automotive-grade transient suppression - combining high-temperature stability, AEC-Q101 validation, and industry-leading surge robustness in compact SMB packages.
FAQ
What is the maximum clamping voltage of the T15B51AHM3/I during a 10/1000 μs surge?
The T15B51AHM3/I clamps to a maximum of 70.1 V when subjected to its rated peak pulse current of 22.1 A under 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 circuitry during worst-case transient events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is the T15B51AHM3/I qualified for automotive applications?
Yes, the T15B51AHM3/I is fully AEC-Q101 qualified, meeting stress test requirements for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Its 185 °C maximum junction temperature and halogen-free, RoHS-compliant HM3 packaging further align with automotive manufacturing and environmental standards. This makes the T15B51AHM3/I suitable for under-hood, body control, and ADAS applications where reliability is mission-critical.
What does the "HM3" suffix indicate in T15B51AHM3/I?
"HM3" denotes Vishay's high-reliability, halogen-free, RoHS-compliant construction with matte tin-plated leads and JESD201 Class 2 whisker resistance. The "I" suffix specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units. This distinguishes it from the "H" variant (7-inch reel, 750 units) and confirms compliance with automotive and industrial assembly requirements.
How does the T15B51AHM3/I compare to standard SMBJ series TVS diodes?
The T15B51AHM3/I offers identical 51 V breakdown voltage and SMB (DO-214AA) footprint as SMBJ51A variants but adds AEC-Q101 qualification, +185 °C junction rating, and 1500 W pulse power - versus 600 W for most SMBJ parts. Its optimized passivated anisotropic rectifier structure also improves long-term stability under thermal cycling, making the T15B51AHM3/I a direct upgrade path for automotive designs needing higher robustness without PCB layout changes.
What is the reverse leakage current of the T15B51AHM3/I at its stand-off voltage?
At its maximum stand-off voltage of 43.6 V and ambient temperature of 25 °C, the T15B51AHM3/I exhibits a maximum reverse leakage current (IR) of 1.0 μA. At elevated junction temperature (TJ = 150 °C), leakage remains ≤1.0 μA - confirming minimal power loss and no signal interference in always-on circuits. This low leakage supports precision analog and low-power sensor applications where quiescent current budget is constrained.
T15B51AHM3/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):
- 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/I FAQ
1.How can I place an order for T15B51AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B51AHM3/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 T15B51AHM3/I reliable?
The price and inventory of T15B51AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B51AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B51AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B51AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B51AHM3/I?
T15B51AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B51AHM3/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 T15B51AHM3/I?
For technical support, including T15B51AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B51AHM3/I requirements.
6.How does Aetrix verify that T15B51AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B51AHM3/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 T15B51AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B51AHM3/I?
All T15B51AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B51AHM3/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 T15B51AHM3/I part is unused and in its original packaging.
Return procedure for T15B51AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B51AHM3/I Tags
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