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Vishay Semiconductor Opto Division TLLG4400-AS12
- Part No.:
- TLLG4400-AS12
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLLG4400-AS12.pdf
- Description:
- LED GREEN DIFFUSED T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:7,114
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Product details
Overview
TLLG4400-AS12 from Vishay Semiconductors is a low-current green LED in a 3 mm tinted diffused package, delivering 0.63–1.2 mcd luminous intensity at 2 mA forward current, with dominant wavelength 562–575 nm and ±25° viewing angle - used for status indication in battery-powered instrumentation and portable control panels.
For engineers reviewing the TLLG4400-AS12 datasheet, TLLG4400-AS12 pinout, TLLG4400-AS12 application, or TLLG4400-AS12 equivalent, this device requires attention to cathode-first tape orientation (AS12), low-power DC biasing (IF = 2 mA), luminous intensity binning (K group), and thermal derating above 84 °C ambient.
Technical Context
This green LED uses GaP-on-GaP epitaxial technology and operates at nominal 2 mA forward current, with forward voltage ranging 1.9–2.4 V. Its optical output is characterized by dominant wavelength 562–575 nm and peak wavelength ~565 nm, measured under 25 ms pulse conditions.
The device features ±25° half-intensity viewing angle, junction-to-ambient thermal resistance of 800 K/W, and absolute maximum ratings including 7 mA DC forward current, 6 V reverse voltage, and 100 °C junction temperature - all specified at Tamb = 25 °C unless noted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 0.63–1.2 mcd at IF = 2 mA - defines visible brightness level for human-readable status indication under low-power bias |
| Dominant wavelength | 562–575 nm - specifies green spectral output compatible with standard color-coding for "OK" or "active" states |
| Forward voltage | 1.9–2.4 V at IF = 2 mA - determines minimum supply headroom and series resistor value for stable biasing |
| Viewing angle | ±25° half-intensity - sets angular visibility window for front-panel mounting with controlled light spread |
| Absolute max forward current | 7 mA DC - limits continuous drive capability; operation beyond 2 mA requires thermal management verification |
| Junction-to-ambient Rth | 800 K/W - indicates high thermal impedance; PCB copper area and ambient airflow must be considered for >2 mA use |
| Operating temperature | −40 to +100 °C - supports industrial-grade deployment but requires luminance derating above 84 °C ambient |
Pinout & Package
Package: Ø3 mm tinted diffused epoxy lens with radial leads; AS12 tape orientation denotes cathode lead exits tape first. Leads are unmarked; polarity identified by shorter lead (anode) and longer lead (cathode) per standard LED convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (shorter lead) | Current entry point | Connected to positive supply via current-limiting resistor; forward bias enables photon emission |
| Cathode (longer lead) | Current exit point | Connected to ground or low-side switch; AS12 tape feed direction confirms cathode-first placement |
Key Features
| Feature | Design Value |
|---|---|
| Low power consumption | Specified at IF = 2 mA - enables multi-LED arrays on coin-cell or energy-harvested supplies without excessive loading |
| High brightness per mA | 0.63–1.2 mcd @ 2 mA - delivers perceptible illumination with minimal current draw, reducing system power budget impact |
| CMOS/MOS compatible | VF ≤ 2.4 V - ensures direct interface with 3.3 V and 5 V logic outputs without level-shifting circuitry |
| Luminous intensity binning | K group (0.63–1.25 mcd) - guarantees consistent visual output across units within same reel, simplifying UI calibration |
| Diffused 3 mm package | Wide ±25° viewing angle - eliminates need for external optics in panel-mount applications requiring broad visibility |
Applications
| Industrial Control Panel Indicators | Portable Medical Device Status Lights |
|---|---|
Use Scenario: Front-panel LED on programmable logic controller (PLC) I/O modules indicating input activation or fault state. IC Role / Device Role / Timing Role: Visual status emitter - no timing or signal processing; driven statically or PWM-modulated at <1 kHz. Use Value: Low 2 mA drive enables direct microcontroller GPIO sourcing while maintaining >100,000-hour lifetime at rated conditions. |
Use Scenario: Power-on and battery-charge indicators on handheld glucose meters and pulse oximeters. IC Role / Device Role / Timing Role: Human-interface light source - operates in steady-state or low-duty-cycle blink mode; no data transmission. Use Value: Green spectral output (562–575 nm) provides high photopic sensitivity for low-luminance perception in dim environments. |
| Low-Power IoT Sensor Node LEDs | Automotive Cabin Control Buttons |
Use Scenario: Wake-up or connectivity status indicator on battery-operated environmental sensors deployed for >5 years. IC Role / Device Role / Timing Role: Standby-state visual marker - biased intermittently via MCU-controlled GPIO to minimize average current. Use Value: 0.63–1.2 mcd output at 2 mA ensures readability while drawing <5 µA average current in 0.1% duty-cycle blink mode. |
Use Scenario: Backlight for tactile pushbuttons in automotive HVAC or infotainment control clusters. IC Role / Device Role / Timing Role: Ambient-light-adapted illumination source - paired with photodiode feedback for automatic brightness scaling. Use Value: Diffused 3 mm package and ±25° viewing angle provide uniform button-face illumination without hotspots or glare. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar green LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLLG4401-AS12 | Luminous intensity 1–2 mcd (L group) vs. 0.63–1.2 mcd (K group); otherwise identical electrical/optical specs | Higher brightness suitable for brighter ambient environments; may require resistor adjustment for same perceived intensity | Select TLLG4401-AS12 when higher luminance is needed without changing drive circuit topology |
| TLLE4400-AS12 | Same package and viewing angle, but yellow-green (570–580 nm dominant) with VF = 2.2–2.7 V and IV = 0.63–1.2 mcd | Warmer hue preferred for "caution" or "warning" coding; higher VF demands revised current-limiting resistor | Choose TLLE4400-AS12 where color differentiation from red/green signals is required in multi-LED interfaces |
Compared with TLLG4400-AS12, TLLG4401-AS12 offers higher luminous intensity in the same footprint and drive conditions, while TLLE4400-AS12 shifts chromaticity toward yellow-green for distinct visual coding - both retain AS12 tape orientation and 3 mm package compatibility.
Availability
TLLG4400-AS12 is available at Aetrix Electronics and suitable for industrial control panels, portable medical devices, low-power IoT sensor nodes, and automotive cabin controls requiring stable component supply and consistent luminous output across production batches.
Supply support for TLLG4400-AS12 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 Semiconductors is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors for industrial and automotive markets.
The TLLG4400-AS12 belongs to Vishay's low-current 3 mm LED family, designed specifically for ultra-low-power status indication in space-constrained, battery-sensitive, and long-life applications.
FAQ
What is the correct forward current rating for reliable operation of the TLLG4400-AS12?
The TLLG4400-AS12 is specified and categorized at IF = 2 mA, which delivers its rated luminous intensity (0.63–1.2 mcd) and ensures optimal lifetime and thermal stability. While its absolute maximum DC forward current is 7 mA, sustained operation above 2 mA requires validation of junction temperature rise and luminance derating per the datasheet curves - the TLLG4400-AS12 is optimized for low-current efficiency, not high-output drive.
How does the AS12 suffix affect PCB assembly and tape handling for TLLG4400-AS12?
The AS12 suffix on TLLG4400-AS12 indicates cathode-first tape orientation: the cathode lead exits the carrier tape before the anode. This affects pick-and-place programming and reel loading direction - incorrect orientation causes reversed polarity placement. The TLLG4400-AS12 must be mounted with the longer lead (cathode) aligned to the designated cathode pad per board layout, and the tape feed path must match AS12 mechanical indexing.
Is TLLG4400-AS12 suitable for PWM dimming, and what frequency range is supported?
Yes, the TLLG4400-AS12 supports PWM dimming, with typical relative luminous intensity linearity verified up to 100 Hz at 25 ms pulse width (per Fig. 5 and Fig. 11). For flicker-free operation, frequencies ≥200 Hz are recommended. Because the TLLG4400-AS12 has no internal driver, PWM must be applied directly to the anode or cathode path using a logic-level switch - ensure duty cycle and peak current stay within 7 mA absolute maximum.
What is the meaning of "K group" luminous intensity classification for TLLG4400-AS12?
The "K group" designation for TLLG4400-AS12 means its luminous intensity is binned between 0.63 mcd (minimum) and 1.25 mcd (maximum) at IF = 2 mA. Vishay ships only one intensity group per reel - so every TLLG4400-AS12 unit on a given reel falls within that K-range. This ensures visual consistency across assemblies without post-production sorting, critical for uniform UI appearance in production.
Does TLLG4400-AS12 meet RoHS and REACH compliance requirements?
Yes, the TLLG4400-AS12 complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed in Vishay's material declarations referenced in document 99912. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and its GaP-on-GaP die construction avoids restricted halogenated flame retardants - full compliance documentation is available upon request for TLLG4400-AS12.
TLLG4400-AS12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- Radial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Color:
- Green
- Configuration:
- Standard
- Lens Color:
- -
- Lens Transparency:
- Diffused
- Millicandela Rating:
- 1.2mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 1.9V
- Current - Test:
- 2mA
- Viewing Angle:
- 50°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 569nm
- Wavelength - Peak:
- 565nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1 (3mm)
- Size / Dimension:
- -
TLLG4400-AS12 FAQ
1.How can I place an order for TLLG4400-AS12 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLLG4400-AS12 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 TLLG4400-AS12 reliable?
The price and inventory of TLLG4400-AS12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLLG4400-AS12 is usually 5 days.
3.What payment methods are accepted for TLLG4400-AS12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLLG4400-AS12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLLG4400-AS12?
TLLG4400-AS12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLLG4400-AS12 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 TLLG4400-AS12?
For technical support, including TLLG4400-AS12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLLG4400-AS12 requirements.
6.How does Aetrix verify that TLLG4400-AS12 is sourced from the original manufacturer or authorized distributors?
All TLLG4400-AS12 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 TLLG4400-AS12 meets industry standards.
7.What is the process for return or replacement of TLLG4400-AS12?
All TLLG4400-AS12 units undergo pre-shipment inspection (PSI). If there is an issue with TLLG4400-AS12, 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 TLLG4400-AS12 part is unused and in its original packaging.
Return procedure for TLLG4400-AS12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLLG4400-AS12 Tags
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LTST-C281KRKT
Lite-On Inc.
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150060GS75000
Würth Elektronik
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150060VS75000
Würth Elektronik
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150060AS75000
Würth Elektronik
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150060YS75000
Würth Elektronik
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150060SS75000
Würth Elektronik
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150060BS75000
Würth Elektronik
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151031VS06000
Würth Elektronik
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151033RS03000
Würth Elektronik
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150080BS75000
Würth Elektronik
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150080GS75000
Würth Elektronik
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150141GS73100
Würth Elektronik
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