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Vishay T15B39AHM3/H
- Part No.:
- T15B39AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B39AHM3/H.pdf
- Description:
- 1.5KW,39V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:2,871
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Product details
Overview
T15B39AHM3/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 features a 39 V nominal breakdown voltage (VBR), 33.3 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and SMB (DO-214AA) package - deployed to clamp inductive switching transients on MOSFET gates and sensor signal lines.
For engineers reviewing the T15B39AHM3/H datasheet, T15B39AHM3/H pinout, T15B39AHM3/H application, or T15B39AHM3/H equivalent, key selection criteria include clamping voltage (53.9 V at IPPM), AEC-Q101 qualification, MSL Level 1 moisture sensitivity, TJ = 185 °C capability, and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under thermal stress. Its unidirectional configuration provides low-leakage reverse blocking up to 33.3 V and rapid response to transients exceeding 30 kV ESD (IEC 61000-4-2 contact/air discharge).
The device operates across -65 °C to +185 °C junction temperature range and delivers 28.8 A peak pulse current (IPPM) with 53.9 V clamping voltage under 10/1000 µs waveform - enabling robust protection of 12 V–48 V automotive subsystems without forward conduction during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nom) | 39.0 V - precise breakdown threshold ensures reliable triggering before downstream IC damage |
| VWM | 33.3 V - maximum continuous reverse operating voltage compatible with 33 V rail systems |
| VC @ IPPM | 53.9 V - clamping voltage limits transient energy delivered to protected circuitry |
| PPPM | 1500 W - handles high-energy surges from inductive load switching (10/1000 µs) |
| IPPM | 28.8 A - peak surge current capacity validated per Fig.3 waveform |
| TJ max | +185 °C - supports under-hood automotive placement without derating |
| ESD Rating | ±30 kV - meets IEC 61000-4-2 contact and air discharge requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified; cathode denoted by color band; matte tin-plated leads, solderable per J-STD-002/JESD 22-B102.
| 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/ground return | Typically tied to system ground plane; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable VBR performance and long-term reliability under thermal cycling (-65 °C to +185 °C) |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning or baking |
| 1500 W pulse power | Protects against ISO 7637-2 Pulse 1/2a/3a transients and load-dump surges in 12 V/24 V systems |
| 0.091 %/°C VBR tempco | Ensures predictable clamping margin across full operating temperature range |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and load-switching spikes in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach IC input pins. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining <2.0 µA leakage at 33.3 V. | Use Scenario: Shielding high-side N-channel MOSFET gate drivers in BLDC motor inverters from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: TVS connected between gate and source to limit dv/dt-induced overshoot and prevent gate oxide breakdown. Use Value: Clamps gate-source voltage to ≤53.9 V during 10/1000 µs surges, preserving MOSFET integrity without affecting PWM timing. |
| Automotive Lighting Module Protection | Power Supply Input Transient Suppression |
Use Scenario: Safeguarding LED driver ICs and current-sense resistors in adaptive front-lighting systems exposed to battery dump events. IC Role / Device Role / Timing Role: TVS placed across input rails (battery to ground) to absorb ISO 16750-2 load-dump energy. Use Value: Withstands 1500 W pulses and maintains 33.3 V standoff, ensuring uninterrupted operation during 12 V system transients. | Use Scenario: Front-end protection of DC-DC converters in telecom power supplies subjected to lightning-induced surges on 48 V input lines. IC Role / Device Role / Timing Role: Primary unidirectional clamp on input bus, coordinated with upstream fuse and downstream filter capacitors. Use Value: Limits input rail excursion to 53.9 V during 28.8 A surges, preventing converter shutdown or overvoltage fault triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A-H | 36 V VBR (min 34.2 V), 30.8 V VWM, 50.4 V VC @ 29.1 A - lower clamping but tighter VBR tolerance | Better suited for 3.3 V–5 V logic-level protection where lower VC is critical; less margin for 12 V rail overshoot | Select when clamping voltage must be <51 V and system VWM is ≤30.8 V |
| 1.5SMC39A | 39 V VBR (min 37.1 V), same VWM/VC, but SMC (DO-214AB) package - 2.5 mm wider, higher thermal mass | Preferred for higher-power industrial designs needing improved thermal dissipation; not drop-in due to larger footprint | Choose when board layout allows SMC footprint and thermal derating above 150 °C is required |
Compared with SMBJ36A-H and 1.5SMC39A, T15B39AHM3/H offers AEC-Q101 qualification and MSL Level 1 out-of-box readiness - making it optimal for automotive production where qualification traceability and reflow compatibility are mandatory, despite identical VBR and VC to 1.5SMC39A.
Availability
T15B39AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drives, LED lighting controllers, and telecom power supply inputs requiring stable component supply with full AEC-Q101 compliance and extended temperature operation.
Supply support for T15B39AHM3/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 reliability, thermal performance, and automotive-grade qualification.
The T15BxxA family was engineered specifically for high-temperature, high-reliability transient suppression in automotive power distribution and sensor interface circuits - delivering 185 °C junction capability and ±30 kV ESD immunity in compact SMB packaging.
FAQ
What is the maximum clamping voltage of the T15B39AHM3/H under a 10/1000 µs surge?
The T15B39AHM3/H has a maximum clamping voltage (VC) of 53.9 V when subjected to its rated peak pulse current of 28.8 A using the standard 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet (Doc #98360) and defines the upper voltage limit imposed on protected circuitry during transient events. The T15B39AHM3/H maintains this clamping performance across its full operating temperature range.
Is the T15B39AHM3/H qualified for automotive applications?
Yes, the T15B39AHM3/H is AEC-Q101 qualified and explicitly rated for automotive use. It meets stringent requirements for temperature cycling, humidity resistance, mechanical shock, and ESD immunity (±30 kV per IEC 61000-4-2). Its 185 °C maximum junction temperature and MSL Level 1 rating further support deployment in engine control units, body electronics, and ADAS modules where reliability is mission-critical. The T15B39AHM3/H carries the HM3 suffix confirming halogen-free, RoHS-compliant, and AEC-Q101-qualified status.
What does the "HM3/H" suffix indicate in T15B39AHM3/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards, plus JESD 201 Class 2 whisker resistance. The trailing "/H" specifies packaging in 7″ diameter plastic tape and reel, with a base quantity of 750 units. This format ensures compatibility with high-speed SMT assembly lines and satisfies automotive traceability requirements. The T15B39AHM3/H is not offered in bulk or tube formats.
How does the T15B39AHM3/H compare to bidirectional TVS diodes in surge protection?
The T15B39AHM3/H is unidirectional and optimized for DC-biased lines such as power rails and signal paths referenced to ground - offering lower leakage (<1.0 µA at VWM) and tighter VBR tolerance than equivalent bidirectional devices. Unlike bidirectional TVS diodes, it does not conduct during normal AC signal swings, making it unsuitable for data-line protection like USB or RS-485. For 12 V automotive power inputs, the T15B39AHM3/H provides superior clamping efficiency and thermal stability compared to bidirectional alternatives with the same VBR.
What is the thermal resistance junction-to-ambient (RθJA) for the T15B39AHM3/H in standard PCB layout?
Vishay does not publish a specific RθJA value for the T15B39AHM3/H in the datasheet (Doc #98360); thermal performance depends heavily on PCB copper area, thickness, and layer count. However, the SMB package's typical RθJA ranges from 100 °C/W (minimal pad) to 50 °C/W (2 cm² 2-oz copper pour on both sides). Derating curves in Figure 2 show power capability decreases linearly above 25 °C ambient - e.g., at 125 °C ambient, T15B39AHM3/H retains ~65 % of its 1500 W rating. Always validate thermal design with actual board layout.
T15B39AHM3/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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 28.8A
- 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)
T15B39AHM3/H FAQ
1.How can I place an order for T15B39AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B39AHM3/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 T15B39AHM3/H reliable?
The price and inventory of T15B39AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B39AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B39AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B39AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B39AHM3/H?
T15B39AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B39AHM3/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 T15B39AHM3/H?
For technical support, including T15B39AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B39AHM3/H requirements.
6.How does Aetrix verify that T15B39AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B39AHM3/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 T15B39AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B39AHM3/H?
All T15B39AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B39AHM3/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 T15B39AHM3/H part is unused and in its original packaging.
Return procedure for T15B39AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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