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Vishay T15B27AHM3/H
- Part No.:
- T15B27AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B27AHM3/H.pdf
- Description:
- 1.5KW,27V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:9,967
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Product details
Overview
T15B27AHM3/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 37.5 V under 41.3 A surge current, and operates up to 185 °C junction temperature in SMB (DO-214AA) package - deployed on signal lines of automotive sensor units and MOSFET gate drivers.
For engineers reviewing the T15B27AHM3/H datasheet, T15B27AHM3/H pinout, T15B27AHM3/H application, or T15B27AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, 27.0 V nominal breakdown voltage, 23.1 V stand-off voltage, 1.0 μA max reverse leakage at VWM, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across wide temperature ranges. Its unidirectional configuration enables robust protection against positive-going transients induced by inductive load switching or ESD events.
The device meets IEC 61000-4-2 with ±30 kV contact/air discharge immunity and supports high-reliability automotive environments via TJ = –65 °C to +185 °C operation and halogen-free, RoHS-compliant HM3 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nom) | 27.0 V - precise breakdown threshold ensures reliable triggering before downstream IC damage |
| VWM | 23.1 V - maximum continuous operating voltage compatible with 24 V automotive systems |
| IPPM | 41.3 A - peak surge current handling capability with 10/1000 μs waveform |
| VC | 37.5 V - clamping voltage limits stress on protected circuitry during surge events |
| PPPM | 1500 W - high-energy absorption capacity for lightning and load-dump transients |
| TJ max | +185 °C - extended thermal range supports under-hood automotive placement |
| ESD Rating | ±30 kV - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by color band. Matte tin-plated leads, MSL Level 1, LF peak 260 °C, JESD 201 Class 2 whisker tested.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side reference node for unidirectional clamping | Connected to protected line; conducts when transient exceeds VBR |
| Anode | Return path to ground or low-impedance reference | Must be routed with minimal inductance to maintain fast response and low clamping overshoot |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling |
| Junction passivation | Enhanced long-term reliability under high-humidity and high-temperature bias conditions |
| 10/1000 μs waveform support | Optimized for industry-standard surge immunity testing and real-world load-switching transients |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking, reducing manufacturing complexity |
| Halogen-free & RoHS | Complies with automotive environmental regulations and end-of-life material restrictions |
Applications
| Automotive Sensor Signal Protection | 24 V Power Rail Clamping |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input. Use Value: Prevents latch-up or damage from inductive kickback during solenoid actuation near sensor harnesses. | Use Scenario: Safeguarding 24 V supply rails feeding motor drivers or body control modules. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing load-dump energy before it reaches downstream regulators. Use Value: Limits rail voltage to ≤37.5 V during ISO 7637-2 Pulse 5a events, preserving DC/DC converter integrity. |
| MOSFET Gate Driver Protection | Infotainment Interface Line Guarding |
Use Scenario: Shielding high-side/low-side gate drive signals in electric power steering (EPS) inverters. IC Role / Device Role / Timing Role: TVS placed across gate-source terminals of SiC or silicon MOSFETs. Use Value: Suppresses Miller-induced voltage spikes that could cause false turn-on or gate oxide breakdown. | Use Scenario: Hardening LIN or CAN FD physical layer interfaces in head unit or cluster displays. IC Role / Device Role / Timing Role: Bidirectional-capable layout not applicable; this unidirectional part used on VCC-side or ground-referenced lines. Use Value: Absorbs ESD from connector mating/unmating while maintaining signal integrity below 100 MHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same SMB package, 27 V VBR, but rated at 600 W PPPM (10/1000 μs) | Limited to lower-energy transients; insufficient for full ISO 7637-2 Pulse 5a compliance | Select when cost sensitivity outweighs peak surge margin and ambient temperature stays <125 °C |
| TPSMA6L27A | Same 27 V VBR, 1500 W rating, but only rated to TJ = 150 °C and not AEC-Q101 qualified | Not approved for automotive under-hood use; requires additional qualification effort | Acceptable for industrial control or commercial transport where AEC-Q101 is not mandated |
Compared with SMBJ27A and TPSMA6L27A, the T15B27AHM3/H provides higher thermal resilience (185 °C vs. ≤150 °C), automotive qualification, and verified 30 kV ESD immunity - making it the sole choice for production-critical automotive signal and power line protection.
Availability
T15B27AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, 24 V power rail clamping, and MOSFET gate driver safeguarding requiring stable component supply across multi-year vehicle production cycles.
Supply support for T15B27AHM3/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 high-reliability and automotive-grade solutions.
The T15B27AHM3/H belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for harsh-environment transient suppression in automotive electronics, meeting stringent AEC-Q101 and IEC 61000-4-2 requirements.
FAQ
What is the breakdown voltage tolerance for T15B27AHM3/H?
The T15B27AHM3/H has a specified breakdown voltage range of 25.7 V (min) to 28.4 V (max) at 1.0 mA test current, with 27.0 V nominal. This ±5% tolerance ensures consistent clamping behavior across production lots and supports design margining for automotive voltage fluctuations.
Is T15B27AHM3/H suitable for bidirectional transient protection?
No, the T15B27AHM3/H is a unidirectional TVS diode and only protects against positive-going transients relative to its cathode. For bidirectional protection, a separate device such as the SMBJ27CA or dual-diode array would be required - the T15B27AHM3/H must be oriented correctly in-circuit with cathode toward the protected line.
Does T15B27AHM3/H require derating at elevated ambient temperatures?
Yes, the T15B27AHM3/H must be derated above TA = 25 °C per Figure 2 in the datasheet. At 125 °C ambient, its 1500 W peak pulse power is reduced to approximately 750 W; full 1500 W capability is only guaranteed at or below 25 °C ambient with proper PCB thermal design.
What is the moisture sensitivity level (MSL) of T15B27AHM3/H?
The T15B27AHM3/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can withstand standard lead-free reflow profiles (peak 260 °C) without baking. This eliminates handling constraints and simplifies SMT integration into high-volume automotive assembly lines.
How does the temperature coefficient of VBR affect T15B27AHM3/H performance?
The T15B27AHM3/H has a typical VBR temperature coefficient of +0.087 %/°C. As junction temperature rises, its breakdown voltage increases linearly - e.g., at 150 °C, VBR rises ~10.9 V above its 25 °C value - ensuring predictable, non-degrading clamping behavior across its full –65 °C to +185 °C operating range.
T15B27AHM3/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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- 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)
T15B27AHM3/H FAQ
1.How can I place an order for T15B27AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B27AHM3/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 T15B27AHM3/H reliable?
The price and inventory of T15B27AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B27AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B27AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B27AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B27AHM3/H?
T15B27AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B27AHM3/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 T15B27AHM3/H?
For technical support, including T15B27AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B27AHM3/H requirements.
6.How does Aetrix verify that T15B27AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B27AHM3/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 T15B27AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B27AHM3/H?
All T15B27AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B27AHM3/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 T15B27AHM3/H part is unused and in its original packaging.
Return procedure for T15B27AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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