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Vishay General Semiconductor - Diodes Division T15B43AHM3/I
- Part No.:
- T15B43AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B43AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
T15B43AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive-grade circuit protection. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 59.3 V under 26.1 A surge, and operates up to 185 °C junction temperature-ideal for safeguarding MOSFETs and sensor signal lines against inductive switching transients and lightning-induced surges.
For engineers reviewing the T15B43AHM3/I datasheet, T15B43AHM3/I pinout, T15B43AHM3/I application, or T15B43AHM3/I equivalent, this page provides verified electrical parameters, SMB (DO-214AA) package details, AEC-Q101 qualification status, clamping performance at rated IPPM, and direct alternatives with documented voltage and power differences.
Technical Context
The T15B43AHM3/I employs passivated anisotropic rectifier technology to achieve stable breakdown behavior across temperature. Its 40.9–45.2 V breakdown range (VBR) at 1 mA IT and 36.8 V stand-off voltage (VWM) define its DC blocking threshold before clamping activation.
It meets IEC 61000-4-2 ±30 kV ESD immunity (contact/air), complies with MSL Level 1 (260 °C reflow), and supports high-reliability automotive environments via AEC-Q101 qualification and TJ = –65 °C to +185 °C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 40.9 / 43.0 / 45.2 V - defines reliable turn-on threshold under 1 mA test current |
| VWM | 36.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA |
| VC @ IPPM | 59.3 V - clamping voltage at 26.1 A peak pulse current (10/1000 μs) |
| PPPM | 1500 W - peak transient energy absorption capability per standard waveform |
| TJ max. | +185 °C - enables use in under-hood automotive electronics without derating |
| Polarity | Unidirectional - protects against positive transients only; cathode marked by band |
| 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. Molding compound UL 94 V-0 rated; matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage event |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stabilizes VBR over temperature and lifetime; reduces parameter drift in harsh environments |
| 185 °C junction rating | Eliminates thermal derating in high-ambient automotive locations (e.g., engine control units) |
| 1500 W peak pulse power | Handles high-energy transients from load dump or relay coil collapse without failure |
| AEC-Q101 qualification | Validates reliability for automotive electronics per stress-test requirements (HTOL, TC, UHAST) |
| MSL Level 1 | Allows unlimited floor life and single-reflow at 260 °C peak without moisture sensitivity concerns |
Applications
| Automotive Powertrain Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V CAN bus transceivers and microcontroller I/O pins in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: TVS diode placed at connector entry point to clamp fast-rising transients before they reach sensitive IC inputs. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic interfaces while maintaining signal integrity below 36.8 V normal operation. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs from motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt device on 4–20 mA loop or 0–10 V analog output rail. Use Value: Limits voltage excursion to ≤59.3 V during 26.1 A surges, preserving ADC input stage integrity and avoiding system reset. |
| Automotive Body Electronics | DC-DC Converter Input Stage |
Use Scenario: Safeguarding LED driver ICs and LIN bus transceivers in door module assemblies subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Board-level ESD suppressor on low-voltage supply rails and communication lines. Use Value: Withstands ±30 kV IEC 61000-4-2 contact discharge and maintains <1 μA leakage at 36.8 V for low-power standby modes. | Use Scenario: Protecting buck converter controller ICs from input voltage spikes caused by hot-plug events or upstream switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V or 24 V input rail feeding isolated DC-DC stages. Use Value: Absorbs 1500 W transient energy without degradation, enabling robust start-stop and regenerative braking system compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | VBR = 45.6–50.4 V; VC = 69.4 V @ 21.7 A; same SMB package | Higher clamping voltage reduces margin for 43 V nominal systems | Select when higher VWM tolerance is acceptable and lower cost is prioritized |
| 1.5SMC43A | VBR = 45.6–50.4 V; VC = 69.4 V @ 21.7 A; larger SMC (DO-214AB) package | Requires PCB footprint change; higher thermal mass but less board density | Choose for legacy designs using SMC or where thermal dissipation >1500 W is needed |
Compared with SMBJ43A and 1.5SMC43A, the T15B43AHM3/I offers tighter VBR tolerance (40.9–45.2 V vs. 45.6–50.4 V), lower clamping voltage (59.3 V vs. 69.4 V), and AEC-Q101 qualification-making it preferable for new automotive designs requiring precise voltage coordination and high-reliability validation.
Availability
T15B43AHM3/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor interface protection, and DC-DC converter input stage applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for T15B43AHM3/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, high-temperature operation, and automotive qualification.
The T15B43AHM3/I belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for high-energy transient suppression in demanding automotive and industrial environments where thermal stability and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage range of the T15B43AHM3/I?
The T15B43AHM3/I has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping onset across production lots and supports precise overvoltage coordination in 43 V nominal systems. The typical VBR is 43.0 V, and the temperature coefficient is +0.092 %/°C.
Is the T15B43AHM3/I qualified for automotive applications?
Yes, the T15B43AHM3/I is AEC-Q101 qualified and rated for junction temperatures up to +185 °C. It meets MSL Level 1 per J-STD-020, passes JESD 201 Class 2 whisker testing, and is halogen-free and RoHS-compliant. These qualifications confirm its suitability for under-hood and body-control automotive modules per industry reliability standards.
What is the clamping voltage of the T15B43AHM3/I at its rated peak pulse current?
The T15B43AHM3/I clamps to a maximum of 59.3 V at its rated peak pulse current (IPPM) of 26.1 A, tested with a 10/1000 μs waveform. This clamping voltage is measured across the device terminals during surge conduction and defines the maximum voltage seen by downstream circuitry-critical for protecting 48 V tolerant ICs and ensuring safe operation within system voltage margins.
Which package does the T15B43AHM3/I use, and what are its key mechanical features?
The T15B43AHM3/I uses the SMB (DO-214AA) package: 0.205–0.220 inch length, 0.130–0.155 inch width, 0.084–0.096 inch height. It features matte tin-plated leads compliant with J-STD-002, UL 94 V-0 molding compound, and a visible cathode band. The HM3 suffix confirms halogen-free, RoHS, and AEC-Q101 compliance.
How does the T15B43AHM3/I compare to standard SMBJ series TVS diodes?
The T15B43AHM3/I offers a lower clamping voltage (59.3 V vs. 69.4 V for SMBJ43A), tighter VBR tolerance (±5% vs. ±10%), and explicit AEC-Q101 qualification-unlike many SMBJ variants. Its 185 °C TJ rating also exceeds the typical 150 °C limit of generic SMBJ devices, making the T15B43AHM3/I better suited for high-temperature automotive deployment where thermal margin is critical.
T15B43AHM3/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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26.1A
- 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)
T15B43AHM3/I FAQ
1.How can I place an order for T15B43AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B43AHM3/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 T15B43AHM3/I reliable?
The price and inventory of T15B43AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B43AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B43AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B43AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B43AHM3/I?
T15B43AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B43AHM3/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 T15B43AHM3/I?
For technical support, including T15B43AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B43AHM3/I requirements.
6.How does Aetrix verify that T15B43AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B43AHM3/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 T15B43AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B43AHM3/I?
All T15B43AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B43AHM3/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 T15B43AHM3/I part is unused and in its original packaging.
Return procedure for T15B43AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B43AHM3/I Tags
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