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Vishay General Semiconductor - Diodes Division TA6L18AHM3/H
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- Part No.:
- TA6L18AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
TA6L18AHM3/H.pdf
- Description:
- 600W,18V 5%, SLIMSMAW PAR
- Quantity:
- Payment:
- Shipping:
Inventory:6,858
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Product details
Overview
TA6L18AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SlimSMAW (DO-221AD) package, featuring 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 5.0 A maximum reverse leakage at VWM, and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of sensor signal lines and MOSFET gate drivers.
For engineers reviewing the TA6L18AHM3/H datasheet, TA6L18AHM3/H pinout, TA6L18AHM3/H application, or TA6L18AHM3/H equivalent, this page delivers verified electrical specs, thermal performance under high-reliability conditions, AEC-Q101 qualification status, and direct alternatives for automotive electronics design validation and BOM optimization.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for stable clamping across -65 °C to +185 °C operating range. Its unidirectional configuration enables precise reverse-biased surge suppression without forward conduction interference in DC-coupled signal paths.
The device delivers 23.5 V maximum clamping voltage (VC) at 5.0 A peak pulse current (IPPM) under 10/1000 µs waveform, with 0.080 %/°C temperature coefficient of VBR enabling predictable voltage shift across automotive thermal cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 18.0 V - Ensures reliable triggering above system operating voltage while maintaining margin against false clamping. |
| VWM | 15.3 V - Maximum continuous reverse voltage before leakage exceeds 1.0 µA, compatible with 12 V automotive supply rails. |
| VC @ IPPM | 23.5 V - Clamps transients to safe levels for downstream 24 V-rated ICs and MOSFETs during load dump events. |
| PPPM | 600 W - Sustains high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation under JEDEC-compliant mounting. |
| TJ max | +185 °C - Enables operation in engine bay and transmission control units where ambient temperatures exceed 125 °C. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including temperature cycling and HTRB. |
| Package | SlimSMAW (DO-221AD) - Low-profile 2.70 mm × 4.00 mm footprint with 1.10 mm height, optimized for space-constrained PCB layouts. |
Pinout & Package
SlimSMAW (DO-221AD) package: surface-mount, single-diode configuration with cathode indicated by color band. Anode and cathode terminals are located on opposite ends of the molded body; polarity must be observed during placement to ensure correct unidirectional clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for transient energy absorption path | Connected to protected line (e.g., sensor output); conducts surge current toward ground when cathode is held at higher potential. |
| Cathode | Reference terminal tied to system ground or low-impedance return | Provides clamping reference; must be routed with minimal inductance to maintain effective VC during fast transients. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<1.0 µA at VWM) and long-term reliability under high-humidity and thermal cycling conditions. |
| TJ = 185 °C capability | Supports deployment in under-hood modules without derating, eliminating need for oversized heatsinking or thermal margin buffers. |
| MSL Level 1, 260 °C lead-free reflow | Allows single-pass assembly with standard Pb-free solder profiles without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualified + JESD 201 Class 2 whisker test | Validates mechanical robustness and intermetallic stability for automotive production use over full vehicle lifetime. |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed automotive enclosures and battery management systems. |
Applications
| Automotive Sensor Protection | Powertrain Control Unit (PCU) Input Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors exposed to load-dump and inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and microcontroller ADC input to clamp ESD and ISO 7637-2 pulses. Use Value: Maintains signal integrity below 23.5 V clamping threshold while drawing <1.0 µA leakage at 15.3 V, preventing ADC saturation or damage. |
Use Scenario: Safeguarding digital inputs of motor drivers and solenoid controllers subjected to 12 V/24 V rail disturbances during ignition and alternator regulation. IC Role / Device Role / Timing Role: Standoff protection element on enable/disable logic lines interfacing with high-side switches and gate drivers. Use Value: Withstands 600 W surges without parameter drift, ensuring functional safety compliance for ASIL-B critical subsystems. |
| Body Electronics LIN Bus Protection | EV Battery Management System (BMS) Signal Isolation |
Use Scenario: Shielding LIN transceiver pins from cable discharge events and board-level ESD in door modules and seat controls. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor placed directly at connector interface before LIN PHY. Use Value: Delivers 23.5 V clamping with negligible impact on LIN timing due to absence of added capacitance beyond intrinsic junction value. |
Use Scenario: Protecting isolated CAN and voltage-sense traces connecting cell monitoring ICs to main BMS controller across high-voltage battery packs. IC Role / Device Role / Timing Role: Transient suppressor on secondary-side signal lines referenced to isolated ground planes. Use Value: Operates reliably at 185 °C junction temperature, supporting thermal design of compact BMS stacks with minimal airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-HF | Same VBR (18 V), but lower PPPM (400 W), higher VC (29.2 V), and only AEC-Q200 rated (not Q101). | Limited to non-safety-critical interior modules; insufficient clamping margin for powertrain-level transients. | Select SMAJ18A-HF only for cost-sensitive cabin applications where 600 W surge immunity is not required. |
| TPSMA6L18A-Q | Identical VBR/VC/PPPM, but packaged in SOD-128 (DO-216AA) with larger footprint (3.5 mm × 2.5 mm) and higher RθJA (160 °C/W). | Requires more PCB area and exhibits greater thermal rise under sustained surge duty cycles. | Choose TPSMA6L18A-Q only if existing layout accommodates SOD-128 or requires alternate sourcing from Texas Instruments. |
Compared with SMAJ18A-HF and TPSMA6L18A-Q, TA6L18AHM3/H provides superior thermal robustness (185 °C TJ), tighter clamping (23.5 V), and full AEC-Q101 qualification - making it the preferred choice for high-reliability automotive signal-line protection where layout space and thermal headroom are constrained.
Availability
TA6L18AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, powertrain control unit (PCU) input safeguarding, and EV battery management system (BMS) signal isolation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TA6L18AHM3/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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The TA6L18AHM3/H belongs to Vishay's PAR® series of transient voltage suppressors, engineered specifically for AEC-Q101-compliant automotive electronics demanding high-temperature stability, low-profile packaging, and repeatable clamping performance under harsh environmental stress.
FAQ
What is the clamping voltage of TA6L18AHM3/H at its rated peak pulse current?
The TA6L18AHM3/H has a maximum clamping voltage (VC) of 23.5 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 87415 and ensures protected circuits remain within safe operating limits during surge events. The TA6L18AHM3/H maintains this clamping performance across its full -65 °C to +185 °C junction temperature range.
Is TA6L18AHM3/H qualified for automotive applications?
Yes, TA6L18AHM3/H is AEC-Q101 qualified and meets JESD 201 Class 2 whisker test requirements. Its HM3 suffix denotes halogen-free, RoHS-compliant construction with enhanced metallurgical stability for automotive production use. The TA6L18AHM3/H is intended for under-hood and chassis-mounted modules where reliability under thermal cycling, humidity, and mechanical vibration is mandatory.
What package type does TA6L18AHM3/H use, and what are its key mechanical features?
TA6L18AHM3/H uses the SlimSMAW (DO-221AD) package: a low-profile surface-mount outline measuring 2.70 mm × 4.00 mm with 1.10 mm maximum height. It features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, UL 94 V-0 molding compound, and MSL Level 1 rating for 260 °C lead-free reflow. The TA6L18AHM3/H cathode is marked by a visible color band on the body.
How does the temperature coefficient affect TA6L18AHM3/H's breakdown voltage?
The TA6L18AHM3/H has a typical temperature coefficient (αT) of 0.080 %/°C for VBR. This means its breakdown voltage increases by approximately 14.4 mV per °C rise above 25 °C. For example, at 150 °C junction temperature, VBR rises to ~19.4 V. This linear shift is accounted for in automotive design margins using the formula VBR at TJ = VBR at 25 °C × (1 + αT × (TJ − 25)). The TA6L18AHM3/H datasheet provides full derating curves for accurate system-level modeling.
What is the maximum reverse leakage current for TA6L18AHM3/H at its stand-off voltage?
At 25 °C, TA6L18AHM3/H exhibits a maximum reverse leakage current (IR) of 1.0 µA at its 15.3 V stand-off voltage (VWM). At elevated temperature (TJ = 150 °C), leakage increases to 5.0 µA - still well within acceptable limits for precision analog sensor interfaces. This low leakage ensures minimal loading on high-impedance signal paths and preserves accuracy in automotive sensor conditioning circuits. The TA6L18AHM3/H maintains this performance across its full operational temperature range.
TA6L18AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- -
- 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):
- 23.5A
- Power - Peak Pulse:
- 600W
- 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:
- SlimSMAW (DO-221AD)
TA6L18AHM3/H FAQ
1.How can I place an order for TA6L18AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TA6L18AHM3/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 TA6L18AHM3/H reliable?
The price and inventory of TA6L18AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TA6L18AHM3/H is usually 5 days.
3.What payment methods are accepted for TA6L18AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TA6L18AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TA6L18AHM3/H?
TA6L18AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TA6L18AHM3/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 TA6L18AHM3/H?
For technical support, including TA6L18AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TA6L18AHM3/H requirements.
6.How does Aetrix verify that TA6L18AHM3/H is sourced from the original manufacturer or authorized distributors?
All TA6L18AHM3/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 TA6L18AHM3/H meets industry standards.
7.What is the process for return or replacement of TA6L18AHM3/H?
All TA6L18AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with TA6L18AHM3/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 TA6L18AHM3/H part is unused and in its original packaging.
Return procedure for TA6L18AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TA6L18AHM3/H Tags
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