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Vishay T15B18AHM3/H
- Part No.:
- T15B18AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B18AHM3/H.pdf
- Description:
- 1.5KW,18V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:7,268
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Product details
Overview
T15B18AHM3/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 delivers 1500 W peak pulse power (10/1000 μs), clamps at 25.5 V under 60.8 A surge current, and operates with 17.1–18.9 V breakdown voltage at 1 mA test current. Its SMB (DO-214AA) package supports AEC-Q101 qualification and 185 °C junction temperature capability.
For engineers reviewing the T15B18AHM3/H datasheet, T15B18AHM3/H pinout, T15B18AHM3/H application, or T15B18AHM3/H equivalent, key selection criteria include clamping voltage (VC = 25.5 V), stand-off voltage (VWM = 15.3 V), unidirectional polarity, MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant HM3 packaging for automotive-grade reflow compatibility.
Technical Context
The T15B18AHM3/H employs passivated anisotropic rectifier technology to achieve fast response time and stable clamping under repetitive transients. Its junction passivation enables operation up to TJ = 185 °C, meeting stringent automotive thermal reliability requirements without derating below 150 °C.
It is rated for 30 kV ESD immunity per IEC 61000-4-2 (contact and air discharge) and exhibits a typical VBR temperature coefficient of +0.080 %/°C - enabling predictable voltage drift across wide temperature ranges in engine control or ADAS sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V at 1 mA - defines precise overvoltage triggering threshold for circuit-level protection coordination |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA, ensuring no false triggering during normal operation |
| VC @ IPPM | 25.5 V at 60.8 A - clamping voltage limits downstream IC stress during 10/1000 μs surges, critical for 12 V automotive bus protection |
| PPPM | 1500 W - peak pulse power handling capacity determines survivability against ISO 7637-2 Load Dump and inductive switching events |
| TJ max | +185 °C - enables placement near high-temperature zones (e.g., powertrain ECUs) without thermal derating penalties |
| Polarity | Unidirectional - protects only against positive transients on cathode-biased lines, matching standard 12 V supply rail configurations |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - provides robust electrostatic discharge immunity for exposed sensor or CAN interface lines |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to clamp voltage to VC |
| Anode | Reference/ground return | Connected to system ground or low-impedance return path; completes clamping loop during transient event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress - eliminates need for additional qualification testing in Tier-1 designs |
| Junction passivation | Stable VBR and leakage performance over lifetime and temperature - prevents parameter drift in harsh under-hood environments |
| 1500 W 10/1000 μs rating | Withstands high-energy load dump pulses per ISO 7637-2 Pulse 5a - protects downstream DC-DC converters and microcontrollers |
| MSL Level 1 rating | Enables single-pass lead-free reflow at 260 °C without popcorn cracking - simplifies SMT manufacturing for high-volume automotive PCBs |
| Halogen-free HM3 suffix | Complies with automotive material restrictions (e.g., VW 80101) and supports green manufacturing initiatives |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control modules against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and primary DC-DC converter input stage. Use Value: Clamps surge voltage to ≤25.5 V, preventing damage to 36 V-rated buck controllers and maintaining system uptime during cold-cranking events. | Use Scenario: Shields analog output lines of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry protection on sensor harness connectors, mounted adjacent to connector footprint. Use Value: Limits transient energy to <100 nJ via 30 kV ESD immunity and sub-1 ns response, preserving signal integrity and ADC accuracy. |
| Body Control Module (BCM) LIN Bus Protection | ADAS Camera Power Rail Protection |
Use Scenario: Guards LIN transceiver power pins against battery reversal-induced transients and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN VCC and GND, upstream of regulator. Use Value: Maintains VWM = 15.3 V margin above nominal 12 V LIN supply while surviving 1500 W pulses - ensures communication continuity during fault conditions. | Use Scenario: Secures 5 V or 3.3 V camera module power inputs against hot-swap and in-rush induced spikes in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Secondary-stage TVS after main EMI filter, directly at camera SoC power pins. Use Value: Leverages TJ = 185 °C rating to operate reliably inside sealed camera housings where ambient reaches 105 °C - avoids thermal shutdown during extended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same SMB package, 18 V VBR, but lower PPPM = 600 W and VC = 29.2 V at 20.6 A | Limited to lower-energy transients (e.g., IEC 61000-4-4); not qualified to AEC-Q101 | Select when cost sensitivity outweighs automotive qualification and high-energy surge requirements |
| SMCJ18A | Larger SMC (DO-214AB) package, same 18 V VBR, higher PPPM = 1500 W, but VC = 29.2 V at 51.3 A | Requires PCB layout change; better for board-level surge absorption but less space-efficient | Choose when higher surge current handling is needed and board area permits larger footprint |
Compared with SMBJ18A and SMCJ18A, the T15B18AHM3/H uniquely combines AEC-Q101 qualification, 1500 W capability in SMB size, and tighter clamping (25.5 V vs. ≥29.2 V), making it optimal for space-constrained, high-reliability 12 V automotive power domains where both thermal robustness and low clamping voltage are mandatory.
Availability
T15B18AHM3/H is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera power rails, and industrial PLC I/O protection requiring stable component supply across long production lifecycles.
Supply support for T15B18AHM3/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 MOSFETs for high-reliability applications.
The T15B18AHM3/H belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for automotive-grade transient suppression with emphasis on thermal stability, AEC-Q101 compliance, and high-energy surge resilience in compact SMB packages.
FAQ
What is the maximum clamping voltage of the T15B18AHM3/H under peak surge conditions?
The T15B18AHM3/H has a maximum clamping voltage (VC) of 25.5 V when subjected to its rated peak pulse current of 60.8 A using a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures downstream components see limited overvoltage stress during high-energy transients such as load dump. The T15B18AHM3/H maintains this clamping performance across its full operating temperature range.
Is the T15B18AHM3/H qualified for automotive applications?
Yes, the T15B18AHM3/H is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood and other high-reliability automotive environments. Its HM3 suffix confirms halogen-free, RoHS-compliant construction and compliance with JESD 201 Class 2 whisker resistance - all verified per Vishay's qualification report for the T15BxxA series.
What does the "HM3" suffix indicate in T15B18AHM3/H?
The "HM3" suffix in T15B18AHM3/H denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified variant with matte tin-plated leads and JESD 201 Class 2 whisker resistance. It also signifies MSL Level 1 rating for lead-free reflow compatibility up to 260 °C peak temperature - critical for automotive SMT assembly processes.
How does the T15B18AHM3/H compare to standard SMBJ-series TVS diodes?
The T15B18AHM3/H offers identical 18 V nominal breakdown voltage but delivers 1500 W peak pulse power (vs. 600 W for SMBJ18A) and lower clamping voltage (25.5 V vs. 29.2 V). Unlike SMBJ18A, the T15B18AHM3/H is AEC-Q101 qualified and rated for TJ = 185 °C - making it a direct upgrade for automotive applications demanding higher surge resilience and thermal margin.
What is the reverse leakage current specification for T15B18AHM3/H at maximum operating temperature?
At VWM = 15.3 V and TJ = 150 °C, the T15B18AHM3/H exhibits a maximum reverse leakage current (ID) of 10 μA - consistent with its electrical characteristics table. This low leakage ensures minimal power loss and no interference with sensitive analog or low-power circuits, even under sustained high-temperature operation.
T15B18AHM3/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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 60.8A
- 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)
T15B18AHM3/H FAQ
1.How can I place an order for T15B18AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B18AHM3/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 T15B18AHM3/H reliable?
The price and inventory of T15B18AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B18AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B18AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B18AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B18AHM3/H?
T15B18AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B18AHM3/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 T15B18AHM3/H?
For technical support, including T15B18AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B18AHM3/H requirements.
6.How does Aetrix verify that T15B18AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B18AHM3/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 T15B18AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B18AHM3/H?
All T15B18AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B18AHM3/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 T15B18AHM3/H part is unused and in its original packaging.
Return procedure for T15B18AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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