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Vishay T15B33AHM3/H
- Part No.:
- T15B33AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B33AHM3/H.pdf
- Description:
- 1.5KW,33V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:6,034
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Product details
Overview
T15B33AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive-grade overvoltage protection of sensitive electronics. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 45.7 V max under 33.9 A surge current, and operates reliably up to TJ = 185 °C in SMB (DO-214AA) package - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges.
For engineers reviewing the T15B33AHM3/H datasheet, T15B33AHM3/H pinout, T15B33AHM3/H application, or T15B33AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, 33.0 V nominal breakdown voltage (VBR), 28.2 V stand-off voltage (VWM), <1.0 μA reverse leakage at VWM, and MSL Level 1 moisture sensitivity rating with 260 °C reflow compatibility.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping performance across temperature. Its unidirectional architecture provides low dynamic impedance and fast response time (<1 ns), enabling effective suppression of fast-rising transients on power rails and signal paths.
The device is rated for non-repetitive peak pulse currents up to 33.9 A (10/1000 μs), with clamping voltage tightly controlled at 45.7 V max. Temperature coefficient of VBR is +0.089 %/°C, supporting predictable voltage margining in high-temperature automotive environments up to +185 °C junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V - defines minimum voltage at which device enters avalanche conduction during surge events |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 45.7 V - clamping voltage at 33.9 A peak pulse current; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surges |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating |
| IR @ VWM | <1.0 μA - ensures minimal standby power loss and signal integrity in high-impedance sensor interfaces |
| AEC-Q101 | Qualified - confirms reliability for automotive electronic control units per stress test requirements |
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) | Anode-to-cathode polarity reference | Connected to protected line; avalanche conduction occurs when cathode voltage exceeds anode by ≥VBR |
| Anode | Reference/return path | Typically tied to ground or lower-potential rail; completes clamping path during transient event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR and low leakage over lifetime and temperature |
| High-temperature operation | TJ = 185 °C rating supports placement near heat sources in engine control modules and ADAS ECUs |
| ESD immunity | 30 kV contact/air discharge per IEC 61000-4-2 - protects against assembly-line and field electrostatic events |
| Fast response time | <1 ns turn-on - limits voltage overshoot before clamping engages, critical for protecting fast-switching MOSFET gates |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump and alternator ripple transients on 12 V battery-fed power rails in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 28.2 V. Use Value: Prevents damage to downstream DC-DC converters and microcontrollers during ISO 7637-2 Pulse 5a events. | Use Scenario: Shields analog sensor inputs (e.g., MAP, TPS) from ESD and inductive kickback in engine bay wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and chassis ground to divert sub-100 ns transients. Use Value: Maintains signal fidelity below 1.0 μA leakage at 28.2 V, avoiding offset errors in precision ADC front-ends. |
| ADAS Camera Module Power Input | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Guards 5 V/3.3 V camera module power supply against hot-swap and cable-discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS installed upstream of LDO regulators to absorb 30 kV ESD per IEC 61000-4-2. Use Value: Ensures uninterrupted imaging function with no latch-up or parametric shift after repeated ESD strikes. | Use Scenario: Protects half-bridge gate drivers from voltage spikes generated by motor phase commutation. IC Role / Device Role / Timing Role: Fast-clamping TVS across high-side MOSFET drain-source to limit dv/dt-induced shoot-through risk. Use Value: Limits clamping voltage to 45.7 V, keeping gate driver supply within safe operating area during 1500 W surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-H | Same SMB package, 33 V VBR, but rated for 600 W PPPM (10/1000 μs); lower clamping voltage (53.3 V) at 11.3 A IPPM | Not AEC-Q101 qualified; suitable for industrial, not automotive safety-critical systems | Select when cost sensitivity outweighs automotive qualification and higher surge energy is not required |
| SMCJ33A | Larger SMC (DO-214AB) package; same 33 V VBR, 1500 W PPPM, but 53.3 V VC at 28.3 A IPPM; higher thermal mass | Higher footprint and height; less suitable for space-constrained automotive PCBs | Choose when board layout allows larger package and enhanced thermal dissipation is prioritized over miniaturization |
Compared with SMBJ33A-H and SMCJ33A, the T15B33AHM3/H uniquely combines AEC-Q101 qualification, SMB footprint, 1500 W surge rating, and 45.7 V clamping in a single solution - making it optimal for automotive power and signal line protection where space, reliability, and regulatory compliance are jointly constrained.
Availability
T15B33AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) signal conditioning, and ADAS camera module surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for T15B33AHM3/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, power efficiency, and automotive-grade qualification.
The T15B33AHM3/H belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for harsh-environment automotive electronics needing AEC-Q101 compliance, high-temperature stability, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of the T15B33AHM3/H at its rated peak pulse current?
The T15B33AHM3/H has a maximum clamping voltage (VC) of 45.7 V when subjected to its specified peak pulse current of 33.9 A with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 98360) and reflects worst-case voltage seen by downstream circuitry during surge events. The T15B33AHM3/H maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the T15B33AHM3/H qualified for automotive applications?
Yes, the T15B33AHM3/H is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body electronics, and ADAS modules. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. The T15B33AHM3/H also meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance, supporting lead-free reflow assembly in automotive manufacturing.
What does the "HM3" suffix indicate in T15B33AHM3/H?
The "HM3" suffix in T15B33AHM3/H denotes a halogen-free, RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 solderability and JESD 22-B102 whisker testing requirements. The trailing "/H" indicates packaging in 7″ diameter plastic tape and reel, with 750 units per reel. This configuration ensures compatibility with high-volume SMT assembly while maintaining environmental and reliability compliance required for automotive production.
How does the T15B33AHM3/H compare to standard SMBJ-series TVS diodes?
The T15B33AHM3/H offers identical 33 V nominal breakdown voltage as SMBJ33A but delivers 1500 W peak pulse power (vs. 600 W for SMBJ33A) and is AEC-Q101 qualified - whereas SMBJ33A is not. The T15B33AHM3/H also features tighter VBR tolerance (±5% vs. ±10%) and lower clamping voltage (45.7 V vs. 53.3 V at rated IPPM). These differences make the T15B33AHM3/H appropriate for demanding automotive surge protection where higher energy absorption and qualification are mandatory.
What is the reverse leakage current specification for the T15B33AHM3/H at its stand-off voltage?
The T15B33AHM3/H specifies a maximum reverse leakage current (IR) of 1.0 μA at its stand-off voltage (VWM) of 28.2 V, measured at TA = 25 °C. At elevated temperature (TJ = 150 °C), leakage remains ≤10.0 μA - ensuring minimal impact on high-impedance sensor bias networks and low-power system sleep modes. This low leakage is maintained due to junction passivation and optimized anisotropic rectifier design, as confirmed in the Vishay datasheet (98360, page 2).
T15B33AHM3/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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33.9A
- 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)
T15B33AHM3/H FAQ
1.How can I place an order for T15B33AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B33AHM3/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 T15B33AHM3/H reliable?
The price and inventory of T15B33AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B33AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B33AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B33AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B33AHM3/H?
T15B33AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B33AHM3/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 T15B33AHM3/H?
For technical support, including T15B33AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B33AHM3/H requirements.
6.How does Aetrix verify that T15B33AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B33AHM3/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 T15B33AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B33AHM3/H?
All T15B33AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B33AHM3/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 T15B33AHM3/H part is unused and in its original packaging.
Return procedure for T15B33AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B33AHM3/H Tags
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