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Vishay Semiconductor Opto Division TLLE4401
- Part No.:
- TLLE4401
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLLE4401.pdf
- Description:
- LED YELLOW DIFFUSED T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:5,775
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Product details
Overview
TLLE4401 from Vishay Semiconductors is a high-intensity yellow AlInGaP LED in a standard 3 mm (T-1) diffused plastic package, rated for 2 mA forward current, with dominant wavelength 581–594 nm, luminous intensity 6.3–32 mcd, and ±30° viewing angle-designed for low-power status indication and legend lighting in industrial control panels.
For engineers reviewing the TLLE4401 datasheet, TLLE4401 pinout, TLLE4401 application, or TLLE4401 equivalent, this page delivers verified optical/electrical specs, package dimensions, absolute maximum ratings, luminous intensity binning, and direct alternatives for uniform appearance-critical indicator designs.
Technical Context
The TLLE4401 uses AlInGaP-on-GaAs epitaxial technology to deliver high luminous intensity at low drive current (2 mA), enabling energy-efficient operation in battery-powered and thermally constrained systems. Its diffused lens provides uniform light distribution with ±30° half-intensity angle and tight luminous intensity grouping (Q/R/S bins) for consistent visual appearance across assemblies.
Rated for -40 °C to +100 °C operating temperature and 100 °C junction temperature, the device supports robust performance in industrial environments. Absolute maximum ratings include 30 mA DC forward current, 5 V reverse voltage, and 80 mW power dissipation at Tamb ≤ 60 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 6.3–32 mcd at 2 mA - enables visibility in ambient light while minimizing power draw |
| Dominant wavelength | 581–594 nm - precise yellow output suitable for color-coded status signaling |
| Forward voltage | 1.6–2.2 V at 2 mA - compatible with 3.3 V and 5 V logic-level drive without excessive series resistance |
| Viewing angle | ±30° - wide, uniform illumination ideal for panel-mounted indicators viewed from multiple angles |
| ESD withstand | 2 kV HBM - sufficient robustness for manual handling and board assembly without special ESD controls |
| Junction capacitance | 15 pF at 0 V - negligible impact on switching speed in DC indicator applications |
| Thermal resistance | 400 K/W - limits self-heating under continuous 2 mA operation, supporting long-term reliability |
Pinout & Package
Package: Ø3 mm (T-1) diffused plastic package with cathode-indicating flat side and anode/cathode leads extending 3.4 ± 0.15 mm from body. Standard lead spacing 2.54 mm nominal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (longer lead) | Positive terminal | Connected to current source; polarity must be observed to avoid reverse breakdown |
| Cathode (shorter lead / flat side) | Negative terminal | Common return path; identification via physical flat on package body |
Key Features
| Feature | Design Value |
|---|---|
| AlInGaP-on-GaAs technology | Delivers stable yellow emission with high quantum efficiency and low thermal droop vs. older GaAsP |
| Luminous intensity binning (Q/R/S) | Ensures consistent brightness across LEDs in same bag-no mixing of groups per packaging unit |
| Wide viewing angle (±30°) | Eliminates need for secondary optics in front-panel indicators; supports off-axis readability |
| Low 2 mA test current specification | Enables direct drive from microcontroller GPIO pins without external current-limiting resistors in many cases |
| ESD rating: 2 kV HBM | Reduces risk of field failure during handling and reflow, lowering assembly yield loss |
Applications
| Status Indicator Panels | Industrial Control Legend Lighting |
|---|---|
Use Scenario: Front-panel LED arrays on PLC I/O modules and HMI enclosures requiring consistent visual feedback under variable ambient light. IC Role / Device Role / Timing Role: Discrete visible-light emitter providing binary on/off state indication. Use Value: Tight luminous intensity binning (Q/R/S) ensures uniform brightness across multi-LED displays, avoiding visual mismatch in operator interfaces. |
Use Scenario: Backlighting engraved legends on metal pushbuttons and selector switches in factory automation equipment. IC Role / Device Role / Timing Role: Low-current yellow light source mounted behind translucent labels. Use Value: 581–594 nm dominant wavelength delivers high-contrast yellow output perceptible in daylight and low-light conditions without glare. |
| Low-Power Maintenance Lights | DC Power Rail Monitoring |
Use Scenario: Battery-operated diagnostic tools and portable service equipment needing long runtime indicator lights. IC Role / Device Role / Timing Role: Energy-efficient status emitter operating continuously at 2 mA. Use Value: 1.6–2.2 V forward voltage allows direct connection to single-cell Li-ion (3.0–3.7 V) or two-cell alkaline (2.4–3.2 V) supplies with minimal resistor drop. |
Use Scenario: On-board "power good" indicators for 3.3 V or 5 V rails in embedded controllers and sensor nodes. IC Role / Device Role / Timing Role: Visual confirmation of regulated supply presence and stability. Use Value: Specified at 2 mA enables predictable current draw and thermal profile-no derating needed for continuous operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLLK4401 | Super red emission (626–639 nm dominant wavelength); identical luminous intensity range, VF, and package | Used where red coding is required for alarm, fault, or power-on states instead of yellow status | Select when color semantics demand red-same footprint and drive requirements simplify BOM consolidation |
| TLLE4401-AS21 | No variant-specific data in source; AS21 denotes anode-before-cathode tape orientation-not electrical difference | Required only for automated pick-and-place with specific reel orientation; electrically identical to TLLE4401 | Choose TLLE4401 for bulk or manual assembly; select TLLE4401-AS21 only if SMT line requires anode-leading tape configuration |
Compared with TLLK4401 and TLLE4401-AS21, the TLLE4401 provides unique yellow chromaticity for standardized status coding, while maintaining full mechanical and electrical compatibility-enabling color-differentiated yet interoperable indicator families within the same design platform.
Availability
TLLE4401 is available at Aetrix Electronics and suitable for industrial control panels, HMI status indicators, and low-power DC circuit monitoring requiring stable component supply, consistent luminous intensity binning, and reliable yellow-color coding.
Supply support for TLLE4401 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 Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power management, and sensing solutions for industrial and automotive markets.
The TLLE4401 belongs to Vishay's low-current AlInGaP LED product series, engineered specifically for uniform-appearance indicator applications where brightness matching, color accuracy, and low-power operation are critical design requirements.
FAQ
What is the dominant wavelength range of the TLLE4401?
The TLLE4401 has a dominant wavelength range of 581–594 nm, placing it firmly in the yellow portion of the visible spectrum. This range is measured at 2 mA forward current and supports standardized color-coding for status indication. The TLLE4401 is binned into six wavelength groups (1–6) to ensure consistency within each production lot, and all units shipped in one bag fall within a single group.
Can the TLLE4401 be driven directly from a microcontroller GPIO pin?
Yes-the TLLE4401 is specified at 2 mA forward current with a typical forward voltage of 1.8 V, making it suitable for direct drive from most 3.3 V or 5 V microcontroller GPIOs using a simple current-limiting resistor. For example, with a 3.3 V supply and 1.8 V VF, a 750 Ω resistor sets ~2 mA. The TLLE4401's low drive requirement reduces power consumption and heat generation in space-constrained designs.
What does the "Q/R/S" luminous intensity classification mean for TLLE4401?
The Q/R/S classification defines luminous intensity bins: Q = 6.3–12.5 mcd, R = 10–20 mcd, S = 16–32 mcd. Each TLLE4401 packing unit contains LEDs from only one bin-no mixing across bags. This ensures visual uniformity in multi-LED arrays. The TLLE4401 datasheet guarantees that IVmin/IVmax ≤ 0.5 within a single bag, critical for consistent panel appearance in industrial HMIs.
Is the TLLE4401 suitable for outdoor or high-temperature environments?
The TLLE4401 is rated for an operating temperature range of -40 °C to +100 °C and a maximum junction temperature of 100 °C. Its AlInGaP die construction provides better thermal stability than older GaAsP LEDs. While not IP-rated for moisture ingress, the epoxy package offers adequate protection for indoor industrial enclosures and sheltered outdoor control cabinets with proper thermal management.
How does the TLLE4401 differ from the TLLK4401 beyond color?
Beyond dominant wavelength (yellow 581–594 nm vs. super red 626–639 nm), the TLLE4401 and TLLK4401 share identical forward voltage (1.6–2.2 V), luminous intensity range (6.3–32 mcd), viewing angle (±30°), package, and absolute maximum ratings. They are mechanically and electrically interchangeable-only chromaticity differs, enabling color-coded system states without redesigning PCB layouts or drive circuits.
TLLE4401 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- Radial
- Packaging:
- Bulk
- Product Status:
- Active
- Color:
- Yellow
- Configuration:
- Standard
- Lens Color:
- -
- Lens Transparency:
- Diffused
- Millicandela Rating:
- 17mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 1.8V
- Current - Test:
- 2mA
- Viewing Angle:
- 60°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 589nm
- Wavelength - Peak:
- 591nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1
- Size / Dimension:
- -
TLLE4401 FAQ
1.How can I place an order for TLLE4401 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLLE4401 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 TLLE4401 reliable?
The price and inventory of TLLE4401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLLE4401 is usually 5 days.
3.What payment methods are accepted for TLLE4401?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLLE4401 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLLE4401?
TLLE4401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLLE4401 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 TLLE4401?
For technical support, including TLLE4401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLLE4401 requirements.
6.How does Aetrix verify that TLLE4401 is sourced from the original manufacturer or authorized distributors?
All TLLE4401 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 TLLE4401 meets industry standards.
7.What is the process for return or replacement of TLLE4401?
All TLLE4401 units undergo pre-shipment inspection (PSI). If there is an issue with TLLE4401, 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 TLLE4401 part is unused and in its original packaging.
Return procedure for TLLE4401:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLLE4401 Tags
-
LTST-C281KRKT
Lite-On Inc.
-
150060GS75000
Würth Elektronik
-
150060VS75000
Würth Elektronik
-
150060AS75000
Würth Elektronik
-
150060YS75000
Würth Elektronik
-
150060SS75000
Würth Elektronik
-
150060BS75000
Würth Elektronik
-
151031VS06000
Würth Elektronik
-
151033RS03000
Würth Elektronik
-
150080BS75000
Würth Elektronik
-
150080GS75000
Würth Elektronik
-
150141GS73100
Würth Elektronik
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