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Vishay General Semiconductor - Diodes Division TA6L51AHM3/H
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- Part No.:
- TA6L51AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
TA6L51AHM3/H.pdf
- Description:
- 600W,51V 5%, SLIMSMAW PAR
- Quantity:
- Payment:
- Shipping:
Inventory:8,545
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Product details
Overview
TA6L51AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SlimSMAW (DO-221AD) package, designed for high-reliability automotive and industrial electronics protection. It features 51 V breakdown voltage (VBR), 43.6 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and AEC-Q101 qualification with JESD201 Class 2 whisker test compliance.
For engineers reviewing the TA6L51AHM3/H datasheet, TA6L51AHM3/H pinout, TA6L51AHM3/H application, or TA6L51AHM3/H equivalent, this page delivers verified electrical parameters, mechanical package details, real-world clamping performance, and validated alternative options for automotive sensor line and MOSFET gate protection under inductive switching transients.
Technical Context
The TA6L51AHM3/H employs passivated anisotropic rectifier technology optimized for high-temperature stability and low-leakage operation. Its unidirectional configuration provides precise reverse-biased clamping with 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), enabling robust protection of 48 V automotive signal paths without forward conduction interference.
Designed for SlimSMAW (DO-221AD) footprint compatibility, it supports surface-mount assembly with MSL Level 1 rating and 260 °C lead-free reflow tolerance. The device's 0.093 %/°C temperature coefficient of VBR ensures predictable voltage drift across its -65 °C to +185 °C operating range, critical for engine bay and ADAS module deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 48.5 / 51.0 / 53.6 V - Ensures reliable triggering above system nominal 48 V rail while avoiding false trips during normal operation |
| VWM | 43.6 V - Maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 48 V automotive supply tolerances |
| VC @ IPPM | 70.1 V - Clamped voltage during 8.6 A surge, limiting stress on downstream 75 V-rated ICs or MOSFETs |
| PPPM | 600 W (10/1000 µs) - Handles standard ISO 7637-2 Pulse 1/2a/5a transients without degradation |
| TJ max | +185 °C - Enables placement near high-heat sources (e.g., power inverters, ECUs) without derating |
| AEC-Q101 | Qualified - Meets automotive-grade reliability requirements including temperature cycling, HTRB, and ESD |
| Package | SlimSMAW (DO-221AD) - Low-profile 2.7 × 4.0 × 1.1 mm outline with cathode band marking and matte tin leads |
Pinout & Package
SlimSMAW (DO-221AD) is a surface-mount, single-diode package with two terminals: anode and cathode. Cathode is marked by a color band on the top surface. The package meets UL 94 V-0 flammability rating and uses halogen-free molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides low-impedance path to ground during transient events when cathode is held at higher potential |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., sensor signal, MOSFET gate) | Clamps voltage to ≤70.1 V relative to anode during overvoltage, diverting surge current away from sensitive nodes |
Key Features
| Feature | Design Value |
|---|---|
| 185 °C junction capability | Enables direct mounting on high-temperature PCB zones (e.g., near power stages) without thermal derating penalties |
| AEC-Q101 + JESD201 Class 2 | Validated for automotive under-hood use with resistance to tin whisker growth and extended lifetime under thermal cycling |
| 600 W peak pulse power | Withstands repetitive ISO 16750-2 load dump surges up to 1000 µs duration without parametric shift |
| Low leakage at 150 °C | ≤5 μA at VWM and TJ = 150 °C - prevents signal distortion or false triggering in high-temp sensor interfaces |
| MSL Level 1, 260 °C | Eliminates pre-bake requirement for SMT assembly, reducing manufacturing cost and process complexity |
Applications
| Automotive Sensor Protection | MOSFET Gate Clamp |
|---|---|
Use Scenario: Protecting LIN/CAN sensor signal lines (e.g., pressure, temperature) from inductive switching noise in 48 V mild-hybrid systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching analog front-end or transceiver IC. Use Value: Limits voltage excursion to ≤70.1 V during ISO 7637-2 Pulse 5a (500 V/2 Ω), preserving signal integrity and preventing latch-up in 75 V-tolerant receivers. | Use Scenario: Safeguarding N-channel MOSFET gates in 48 V DC-DC converter half-bridges against Miller-induced voltage spikes. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp dv/dt-induced overshoot during high-side switch turn-off. Use Value: Clamps gate-source voltage to ≤70.1 V within nanoseconds, preventing oxide breakdown in 60 V-rated MOSFETs without adding RC snubber losses. |
| Engine Control Unit (ECU) Power Rail | Industrial Motor Drive I/O |
Use Scenario: Secondary protection on 48 V input rail of engine control units exposed to alternator load dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse and upstream of DC-DC converter input filter. Use Value: Absorbs up to 600 W for 1 ms per ISO 16750-2, limiting rail voltage to <75 V and protecting 80 V-input regulators and controllers. | Use Scenario: Protecting encoder feedback lines in servo drives operating in factory environments with frequent motor switching. IC Role / Device Role / Timing Role: TVS installed at connector interface to shunt EMI-coupled transients before entering differential line receiver. Use Value: Maintains <1 nA leakage at 43.6 V standoff, ensuring no offset error in 24-bit ADC-based position sensing over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Same VBR (48.5–53.6 V), but lower PPPM = 400 W; TO-277 (SMA) package, larger footprint (4.5 × 2.7 mm) | Limited to lower-energy transients; not qualified to AEC-Q101 or JESD201 Class 2 | Select SMAJ51A only for non-automotive, cost-sensitive industrial designs where 400 W surge margin suffices and board space allows SMA footprint. |
| SMCJ51A | Higher PPPM = 1500 W, same VBR, but DO-214AB (SMC) package (7.1 × 6.2 mm); no AEC-Q101 or whisker test data published | Overqualified for most 48 V systems; requires 3× PCB area vs. SlimSMAW | Choose SMCJ51A only when legacy layout constraints mandate SMC footprint or when >1 kW surge immunity is required (e.g., heavy-duty truck battery disconnect). |
Compared with SMAJ51A and SMCJ51A, TA6L51AHM3/H delivers optimal balance of AEC-Q101 reliability, 600 W surge handling, and ultra-compact SlimSMAW packaging-making it the preferred choice for space-constrained, high-temperature automotive modules where both qualification and size matter.
Availability
TA6L51AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, 48 V power rail clamping, and MOSFET gate safeguarding requiring stable component supply across production lifecycles.
Supply support for TA6L51AHM3/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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The TA6L51AHM3/H belongs to Vishay's PAR® series of high-temperature TVS diodes, engineered specifically for under-hood automotive electronics needing sustained operation up to +185 °C and immunity to harsh environmental stressors.
FAQ
What is the clamping voltage of the TA6L51AHM3/H at its rated peak pulse current?
The TA6L51AHM3/H has a maximum clamping voltage (VC) of 70.1 V at its rated peak pulse current (IPPM) of 8.6 A, measured under the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 17-Sep-2021 and defines the upper voltage limit imposed on protected circuits during surge events. The TA6L51AHM3/H maintains this clamping performance across its full operating temperature range.
Is the TA6L51AHM3/H suitable for 48 V automotive systems?
Yes, the TA6L51AHM3/H is explicitly designed for 48 V automotive applications. Its 43.6 V stand-off voltage (VWM) accommodates typical 48 V rail tolerances, while its 51 V breakdown voltage and 70.1 V clamping voltage align with ISO 16750-2 and ISO 7637-2 surge standards. The TA6L51AHM3/H is AEC-Q101 qualified and rated for 185 °C junction temperature, making it suitable for under-hood deployment.
Does the TA6L51AHM3/H have a unidirectional or bidirectional configuration?
The TA6L51AHM3/H is a unidirectional transient voltage suppressor. As confirmed in the Vishay datasheet, it operates only in reverse-bias mode to clamp positive transients on the cathode side relative to the anode. It does not provide symmetrical clamping for AC or bipolar transients. This configuration is ideal for DC-coupled signal and power line protection where polarity is fixed, such as in 48 V sensor or gate drive circuits.
What package type does the TA6L51AHM3/H use, and what are its key mechanical features?
The TA6L51AHM3/H uses the SlimSMAW (DO-221AD) package: a low-profile surface-mount case measuring 2.7 × 4.0 × 1.1 mm. Key features include UL 94 V-0 flammability rating, halogen-free and RoHS-compliant molding compound, matte tin-plated leads solderable per J-STD-002, and a visible cathode band for polarity identification. The TA6L51AHM3/H's SlimSMAW footprint enables high-density PCB layouts in space-constrained automotive modules.
How does the temperature coefficient of VBR affect the TA6L51AHM3/H in high-temperature environments?
The TA6L51AHM3/H has a typical temperature coefficient of VBR (αT) of 0.093 %/°C, meaning its breakdown voltage increases predictably with junction temperature. At 150 °C, VBR rises ~11.7% above its 25 °C value (to ~56.9 V), ensuring continued protection margin without premature conduction. This behavior is fully characterized in the Vishay datasheet and enables accurate transient threshold modeling in thermal simulations for the TA6L51AHM3/H.
TA6L51AHM3/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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
TA6L51AHM3/H FAQ
1.How can I place an order for TA6L51AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TA6L51AHM3/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 TA6L51AHM3/H reliable?
The price and inventory of TA6L51AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TA6L51AHM3/H is usually 5 days.
3.What payment methods are accepted for TA6L51AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TA6L51AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TA6L51AHM3/H?
TA6L51AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TA6L51AHM3/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 TA6L51AHM3/H?
For technical support, including TA6L51AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TA6L51AHM3/H requirements.
6.How does Aetrix verify that TA6L51AHM3/H is sourced from the original manufacturer or authorized distributors?
All TA6L51AHM3/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 TA6L51AHM3/H meets industry standards.
7.What is the process for return or replacement of TA6L51AHM3/H?
All TA6L51AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with TA6L51AHM3/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 TA6L51AHM3/H part is unused and in its original packaging.
Return procedure for TA6L51AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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