My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TA6F18AHM3_A/H
- Part No.:
- TA6F18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
TA6F18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TA6F18AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SlimSMA (DO-221AC) package, with 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), and 600 W peak pulse power (10/1000 μs). It delivers 23.5 V clamping voltage at 25.5 A peak surge current and operates up to +185 °C junction temperature, making it suitable for automotive sensor line protection against load dump and ESD.
For engineers reviewing the TA6F18AHM3_A/H datasheet, TA6F18AHM3_A/H pinout, TA6F18AHM3_A/H application, or TA6F18AHM3_A/H equivalent, this device requires attention to unidirectional polarity marking, thermal derating above 25 °C ambient, MSL Level 1 reflow compatibility, and its role as a low-capacitance, high-reliability clamping element in 12 V automotive signal paths.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its junction design enables stable VBR temperature coefficient of +0.080 %/°C and supports operation from –65 °C to +185 °C, meeting AEC-Q101 stress test requirements for automotive electronics.
The SlimSMA package provides 0.95 mm typical height and matte tin-plated terminals solderable per J-STD-002 and JESD22-B102. Thermal resistance is 120–150 °C/W (junction-to-ambient) on FR4 PCB with minimum recommended pad layout, enabling robust transient energy dissipation without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V at 1.0 mA - defines reliable conduction onset under transient overvoltage |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 23.5 V at 25.5 A - clamping voltage limiting downstream IC stress during 10/1000 μs surge |
| PPPM | 600 W (10/1000 μs) - peak transient energy absorption capacity without failure |
| TJ max | +185 °C - enables placement near high-temperature components in engine control units |
| ESD rating | 30 kV contact/air per IEC 61000-4-2 - protects against human-body-model and system-level ESD events |
| MSL level | Level 1 (260 °C peak reflow) - supports standard SMT assembly without dry-pack or baking |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, unidirectional configuration with cathode indicated by color band. Dimensions: 4.15–4.35 mm length × 2.50–2.70 mm width × 0.95 mm typical height. Matte tin-plated terminals meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode |
| Cathode | High-side transient input terminal | Marked with color band; connects to protected line (e.g., CAN_H, LIN, sensor output) |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature junction capability | TJ = 185 °C enables use in under-hood automotive modules without thermal derating penalties |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per AEC standard |
| Low-profile SlimSMA package | 0.95 mm height allows routing beneath connectors or in space-constrained ADAS sensor housings |
| Optimized junction passivation | Reduces long-term leakage drift and improves stability under high-humidity, high-bias stress conditions |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and material categorization per Vishay Doc. 99912 |
Applications
| Automotive Sensor Protection | CAN Bus Line Clamping |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load-switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and ECU input to clamp fast-rising spikes below IC absolute maximum ratings. Use Value: Limits clamping voltage to 23.5 V while absorbing 600 W surges, preserving signal integrity and preventing latch-up in 12 V automotive systems. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD and battery dump events in body control modules. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to chassis ground, providing symmetric transient suppression without affecting data eye. Use Value: 30 kV IEC 61000-4-2 ESD immunity and 185 °C operation ensure robustness across vehicle lifecycle and environmental extremes. |
| Infotainment Interface Protection | Powertrain Control Unit Inputs |
|
Use Scenario: Shielding USB, LVDS, or I²C lines connecting head unit to display or camera modules from cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF typical) placed at connector entry point to minimize signal distortion. Use Value: SlimSMA footprint enables placement directly at board edge with minimal trace inductance, improving clamping response time. |
Use Scenario: Guarding throttle position, crankshaft, and camshaft sensor inputs in engine management systems against alternator ripple and ignition noise. IC Role / Device Role / Timing Role: Stand-off voltage of 15.3 V ensures no conduction during normal 12 V rail operation while triggering within 100 ns of overvoltage. Use Value: Stable VBR temperature coefficient (+0.080 %/°C) maintains consistent clamping threshold across –40 °C to +150 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Same SlimSMA package, but lower PPPM = 400 W and VC = 29.2 V at 13.7 A; TJ max = 150 °C | Limited to non-critical 12 V circuits where 600 W surge margin is not required | Select SMAJ18A only if thermal budget and surge severity are lower; TA6F18AHM3_A/H offers superior automotive-grade endurance. |
| 1.5SMC18A | DO-214AB package (larger), PPPM = 1500 W, VC = 29.2 V at 51.3 A; TJ max = 175 °C; not AEC-Q101 qualified | Suitable for industrial power supply rails but incompatible with space-constrained automotive PCB layouts | Choose 1.5SMC18A for higher-power primary-side protection; TA6F18AHM3_A/H is preferred for secondary-side, high-density automotive signal lines. |
Compared with SMAJ18A and 1.5SMC18A, TA6F18AHM3_A/H uniquely combines AEC-Q101 qualification, 185 °C junction rating, and 0.95 mm profile in SlimSMA-enabling direct integration into next-generation automotive ECUs where reliability, size, and thermal headroom are co-constrained.
Availability
TA6F18AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus clamping, and infotainment interface safeguarding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TA6F18AHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, automotive-qualified solutions.
The TA6F series belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for automotive signal-line protection under AEC-Q101 stress conditions and high-temperature under-hood environments.
FAQ
What is the clamping voltage of TA6F18AHM3_A/H at its rated peak pulse current?
The TA6F18AHM3_A/H has a maximum clamping voltage (VC) of 23.5 V when subjected to its rated peak pulse current of 25.5 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Doc. 89939, Rev. 16-Jan-2025) and ensures protected circuitry remains below critical voltage thresholds during transient events. The TA6F18AHM3_A/H achieves this performance while maintaining low leakage and stable temperature coefficient.
Is TA6F18AHM3_A/H qualified for automotive applications?
Yes, TA6F18AHM3_A/H is AEC-Q101 qualified and designed for automotive use. It meets stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its 185 °C maximum junction temperature, MSL Level 1 reflow rating, and halogen-free HM3 construction align with automotive electronics manufacturing and operational demands. The TA6F18AHM3_A/H is explicitly listed in Vishay's automotive-grade TVS portfolio.
What does the "HM3_A/H" suffix indicate in TA6F18AHM3_A/H?
The "HM3" denotes the SlimSMA (DO-221AC) package with halogen-free, RoHS-compliant molding compound and matte tin-plated terminals. "A/H" specifies the packaging format: 7-inch diameter plastic tape and reel, with 3500 units per reel. This ordering code follows Vishay's standardized nomenclature in Document 89939 and ensures correct identification for automated SMT placement and logistics handling of the TA6F18AHM3_A/H.
How does TA6F18AHM3_A/H compare to bidirectional TVS diodes in automotive designs?
TA6F18AHM3_A/H is unidirectional and optimized for DC-biased signal lines like sensor outputs or CAN_H/CAN_L, where reverse conduction must be blocked during normal operation. Unlike bidirectional variants, it avoids leakage path issues in single-polarity systems and provides tighter VWM/VBR ratios (15.3 V / 18.0 V). For applications requiring symmetric AC protection (e.g., Ethernet PHYs), a bidirectional part would be selected-but TA6F18AHM3_A/H delivers superior performance in standard 12 V automotive signal paths.
What is the thermal resistance of TA6F18AHM3_A/H on a standard FR4 PCB?
The TA6F18AHM3_A/H exhibits a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on an FR4 PCB using the minimum recommended pad layout per JEDEC 51-2A. Maximum RθJA is 150 °C/W under same conditions. This enables accurate thermal modeling for power dissipation derating-especially critical in high-density automotive modules where ambient temperatures exceed 85 °C. The TA6F18AHM3_A/H's 185 °C TJ rating further extends usable thermal margin.
TA6F18AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- 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):
- 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:
- DO-221AC (SlimSMA)
TA6F18AHM3_A/H FAQ
1.How can I place an order for TA6F18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TA6F18AHM3_A/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 TA6F18AHM3_A/H reliable?
The price and inventory of TA6F18AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TA6F18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TA6F18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TA6F18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TA6F18AHM3_A/H?
TA6F18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TA6F18AHM3_A/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 TA6F18AHM3_A/H?
For technical support, including TA6F18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TA6F18AHM3_A/H requirements.
6.How does Aetrix verify that TA6F18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TA6F18AHM3_A/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 TA6F18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TA6F18AHM3_A/H?
All TA6F18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TA6F18AHM3_A/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 TA6F18AHM3_A/H part is unused and in its original packaging.
Return procedure for TA6F18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TA6F18AHM3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
