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Vishay General Semiconductor - Diodes Division T15B30AHM3/I
- Part No.:
- T15B30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B30AHM3/I.pdf
- Description:
- 1500 W UNI-DIRECTIONAL TVS IN SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,200
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Product details
Overview
T15B30AHM3/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 41.4 V under 37.4 A surge current, and operates up to TJ = 185 °C in SMB (DO-214AA) package - used to safeguard MOSFETs and sensor signal lines against inductive switching transients and lightning-induced surges.
For engineers reviewing the T15B30AHM3/I datasheet, T15B30AHM3/I pinout, T15B30AHM3/I application, or T15B30AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, 30 V nominal breakdown voltage (VBR = 28.5–31.5 V), 25.6 V stand-off voltage (VWM), <1.0 μA reverse leakage at VWM, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for stable clamping performance across temperature. Its unidirectional architecture provides low dynamic impedance during transient events, enabling fast response time and precise overvoltage clamping without forward conduction during normal operation.
The device is rated for non-repetitive 10/1000 μs surge waveforms and supports derated peak pulse power above TA = 25 °C per Fig.2. Thermal design must account for TJ max = 185 °C and the positive temperature coefficient of VBR (αT = 0.088 %/°C), which ensures predictable voltage drift under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 28.5 / 30.0 / 31.5 V - defines minimum voltage at which device enters avalanche breakdown; critical for ensuring clamping occurs only above system operating voltage |
| VWM | 25.6 V - maximum continuous reverse working voltage; must exceed highest expected steady-state line voltage to prevent leakage or degradation |
| PPPM (10/1000 μs) | 1500 W - peak transient energy handling capacity; determines survivability against standardized lightning and load-dump surges |
| VC @ IPPM | 41.4 V - clamping voltage at 37.4 A peak current; sets upper bound on protected circuit voltage during worst-case surge |
| TJ max | +185 °C - maximum junction temperature; enables use in under-hood automotive environments and high-power industrial enclosures |
| IR @ VWM | <1.0 μA - reverse leakage at stand-off voltage; ensures minimal power loss and signal integrity in always-on sensor interfaces |
| MSL Level | Level 1 (per J-STD-020) - allows unlimited floor life and reflow up to 260 °C peak; eliminates baking requirements for SMT assembly |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by molded band; matte tin-plated leads solderable per J-STD-002 and 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 voltage exceeds VBR |
| Anode | Reference node / ground return | Typically tied to system ground plane; completes current path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Junction passivation | Reduces surface leakage and improves long-term stability under high humidity and thermal cycling |
| 185 °C junction rating | Enables placement near heat sources (e.g., power converters, motor drivers) without derating or thermal shutdown |
| 30 kV ESD immunity (IEC 61000-4-2) | Protects downstream ICs from human-body-model electrostatic discharge without external shielding or filtering |
| Unidirectional configuration | Prevents forward conduction during normal DC bias while providing robust reverse-transient suppression |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN/CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector interface to clamp fast-rising spikes before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and ADC inputs by limiting transient excursions to ≤41.4 V. | Use Scenario: Safeguarding digital I/O lines and encoder feedback signals in variable-frequency drives subjected to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Standoff-clamping TVS mounted at PCB edge connectors to absorb 1500 W surges without affecting signal rise/fall times. Use Value: Maintains signal integrity across 100 kHz encoder pulses while surviving repeated 37.4 A surge events per IEC 61000-4-5. |
| Power Supply Input Protection | Automotive Lighting Control |
Use Scenario: Front-end protection for 24 V DC-DC converters in commercial vehicle infotainment systems experiencing ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Primary clamping element placed after fuse and before input capacitor to limit surge voltage seen by upstream regulator ICs. Use Value: Enables compliance with automotive EMC standards using single-stage protection due to low clamping ratio (VC/VWM = 1.62). | Use Scenario: Overvoltage protection for LED driver ICs controlling headlamp or DRL modules subject to battery reversal and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional TVS connected between supply rail and ground to shunt reverse polarity energy and load dump spikes. Use Value: Survives 185 °C junction temperature during prolonged overvoltage events, preventing thermal runaway in sealed lamp housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | Same SMB package, 30 V VBR, but lower PPPM = 600 W and no AEC-Q101 qualification | Limited to non-automotive industrial use; not suitable for under-hood deployment | Select only if cost sensitivity outweighs automotive reliability requirements and surge energy stays below 600 W |
| SMCJ30A | Higher PPPM = 1500 W, same VBR range, but larger SMC (DO-214AB) package (7.11 × 6.22 mm vs. 4.57 × 3.94 mm) | Requires PCB layout change; better thermal mass but incompatible with space-constrained automotive modules | Choose when board area permits and higher thermal dissipation margin is needed beyond 185 °C junction limit |
Compared with SMBJ30A and SMCJ30A, the T15B30AHM3/I uniquely combines AEC-Q101 qualification, SMB footprint, and full 1500 W capability - making it the only option meeting automotive-grade surge protection in compact layouts without sacrificing power rating or temperature resilience.
Availability
T15B30AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O, and power supply input protection requiring stable component supply across extended production lifecycles.
Supply support for T15B30AHM3/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, efficiency, and application-specific optimization.
The T15B30AHM3/I belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for harsh-environment automotive and industrial transient suppression where AEC-Q101 compliance, high-temperature operation, and consistent clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance for T15B30AHM3/I?
The T15B30AHM3/I has a specified breakdown voltage (VBR) range of 28.5 V (min) to 31.5 V (max) at IT = 1.0 mA, with a nominal value of 30.0 V. This ±5% tolerance ensures reliable triggering above system operating voltage while maintaining sufficient margin against false triggering during normal transients. The VBR measurement follows ANSI/IEEE C62.35 standards and is validated at 300 μs square-wave pulse conditions.
Is T15B30AHM3/I suitable for bidirectional transient protection?
No, the T15B30AHM3/I is a unidirectional TVS diode and is not rated for bidirectional surge suppression. Its electrical characteristics - including VBR, VWM, and clamping behavior - are defined only for reverse-biased operation. For AC or dual-polarity signal lines, a dedicated bidirectional device such as the T15B30AHM3/I's counterpart in the same family (e.g., T15B30AHM3/IT) would be required, though that variant is not part of the T15BxxA series.
Does T15B30AHM3/I require derating at elevated ambient temperatures?
Yes, the T15B30AHM3/I requires derating of peak pulse power above TA = 25 °C, per Figure 2 in the datasheet. At 85 °C ambient, the allowable PPPM drops to approximately 75% of 1500 W (~1125 W); at 125 °C, it falls to ~50%. Derating is based on junction temperature limits (TJ ≤ 185 °C) and must be calculated using thermal resistance and power dissipation models for the specific PCB layout and airflow conditions.
What does the "HM3" suffix indicate in T15B30AHM3/I?
How does the temperature coefficient affect T15B30AHM3/I's clamping performance?
The T15B30AHM3/I exhibits a positive temperature coefficient of VBR (αT = 0.088 %/°C), meaning its breakdown voltage increases linearly with junction temperature. At TJ = 150 °C, VBR rises ~11% above its 25 °C value - resulting in higher clamping thresholds under thermal stress. This behavior must be factored into worst-case surge analysis to ensure protected circuits remain within safe voltage margins across full operating temperature ranges.
T15B30AHM3/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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 37.4A
- 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)
T15B30AHM3/I FAQ
1.How can I place an order for T15B30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B30AHM3/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 T15B30AHM3/I reliable?
The price and inventory of T15B30AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B30AHM3/I is usually 5 days.
3.What payment methods are accepted for T15B30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B30AHM3/I?
T15B30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B30AHM3/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 T15B30AHM3/I?
For technical support, including T15B30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B30AHM3/I requirements.
6.How does Aetrix verify that T15B30AHM3/I is sourced from the original manufacturer or authorized distributors?
All T15B30AHM3/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 T15B30AHM3/I meets industry standards.
7.What is the process for return or replacement of T15B30AHM3/I?
All T15B30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T15B30AHM3/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 T15B30AHM3/I part is unused and in its original packaging.
Return procedure for T15B30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T15B30AHM3/I Tags
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Diodes Incorporated
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