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Vishay Semiconductor Opto Division TLLR5401
- Part No.:
- TLLR5401
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLLR5401.pdf
- Description:
- LED RED DIFFUSED T-1 3/4 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
TLLR5401 from Vishay Semiconductors is a low-current red LED in a 5 mm tinted diffused package, with luminous intensity of 1–2 mcd at 2 mA forward current, dominant wavelength 612–625 nm, forward voltage 1.9–2.4 V, and viewing angle ±25°. It serves as an indicator in space-constrained, ultra-low-power DC circuits where visual status feedback is required under minimal drive conditions.
For engineers reviewing the TLLR5401 datasheet, TLLR5401 pinout, TLLR5401 application, or TLLR5401 equivalent, key selection criteria include its 2 mA test condition, GaAsP-on-GaP semiconductor technology, 6 V reverse voltage rating, 7 mA absolute max forward current, and thermal resistance of 500 K/W - all critical for battery-powered and thermally sensitive indicator designs.
Technical Context
The TLLR5401 operates as a visible-light emitter using GaAsP on GaP heterostructure technology, optimized for stable optical output at low drive currents (IF = 2 mA). Its ±25° half-intensity angle and diffused lens ensure uniform, non-glare illumination suitable for front-panel indicators.
Rated for operation from –40 °C to +100 °C ambient, it features a junction-to-ambient thermal resistance of 500 K/W and maximum power dissipation of 20 mW at Tamb ≤ 90 °C - confirming its suitability for passive-cooled, low-burden indicator nodes without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 1–2 mcd at 2 mA - provides clear visibility in low-ambient-light industrial panels without excessive current draw |
| Dominant wavelength | 612–625 nm - standard red spectral output compatible with human eye sensitivity and color-coded status conventions |
| Forward voltage | 1.9–2.4 V at 2 mA - enables direct interface with 3.3 V or 5 V logic rails via simple current-limiting resistor |
| Viewing angle | ±25° - delivers focused yet sufficiently wide emission for angled viewing in compact enclosures |
| Absolute max forward current | 7 mA - defines safe continuous operating limit for long-term reliability in unregulated supply environments |
| Junction-to-ambient Rth | 500 K/W - confirms suitability for PCB-mount use without forced airflow or thermal vias in low-power applications |
| Reverse voltage | 6 V - allows tolerance against transient polarity reversals in field-serviceable or battery-swappable devices |
Pinout & Package
Package: Ø 5 mm radial-leaded, tinted diffused epoxy lens, standard through-hole mounting with 2.54 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Positive terminal | Connected to current source or logic-high node; requires series resistor to limit IF to ≤2 mA for nominal operation |
| Cathode (K) | Negative terminal | Connected to ground or logic-low node; polarity-sensitive - reverse connection blocks conduction and risks damage above 6 V |
Key Features
| Feature | Design Value |
|---|---|
| Low power consumption | Specified at IF = 2 mA - reduces system-level current budget impact in multi-LED status arrays |
| High brightness per mA | 1–2 mcd @ 2 mA - achieves usable luminance with sub-5 mA drive, extending battery life in portable indicators |
| CMOS/MOS compatible | Max VF = 2.4 V and min VR = 6 V - ensures safe interfacing with 3.3 V CMOS outputs without level-shifting |
| Luminous intensity categorization | IVmin/IVmax ≤ 0.5 in one packing unit - supports consistent visual grading across production batches for UI uniformity |
Applications
| Industrial Control Panel Indicator | Portable Diagnostic Device Status Light |
|---|---|
Use Scenario: Front-panel power-on and fault indication on DIN-rail mounted PLC I/O modules operating at 24 V DC with local 3.3 V regulation. IC Role / Device Role / Timing Role: Visual status emitter - no timing or signal processing role; functions solely as optically coupled human interface element. Use Value: Delivers legible red glow at 2 mA, minimizing load on auxiliary 3.3 V rail while maintaining >100,000-hour lifetime under continuous operation. |
Use Scenario: Battery-powered handheld medical analyzer showing measurement ready state via steady red illumination during 10-second assay cycles. IC Role / Device Role / Timing Role: Low-duty-cycle visual indicator - driven intermittently at 2 mA to extend CR2032 coin cell life beyond 12 months. Use Value: Achieves sufficient luminance at 2 mA with 500 K/W RthJA, eliminating need for thermal derating or pulse-width modulation. |
| Automotive Dashboard Warning Light | IoT Sensor Node Link Activity Indicator |
Use Scenario: Non-safety-critical warning icon (e.g., "Check Fluid Level") in 12 V automotive cabin clusters with ambient temperature cycling from –40 °C to +85 °C. IC Role / Device Role / Timing Role: Ambient-temperature-stable optical indicator - no CAN or LIN bus involvement; purely analog optical output. Use Value: Maintains luminous output stability across full –40 °C to +100 °C operating range, validated per Vishay's Tamb sweep data (Fig. 7). |
Use Scenario: Sub-1 mA blink-to-notify LED on LoRaWAN environmental sensor node powered by solar-charged Li-ion battery. IC Role / Device Role / Timing Role: Intermittent activity marker - pulsed at 2 mA peak, 0.1% duty cycle to minimize average current draw. Use Value: Enables visible signaling with <10 μA average current due to high mcd/mA efficiency and diffused lens uniformity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLHR5401 | Same package and optical specs, but uses AlGaAs technology - higher VF (2.0–2.6 V) and narrower λd (620–630 nm) | Better suited for high-contrast red in bright ambient; less efficient below 2.5 V supply | Select TLHR5401 only if tighter wavelength control and higher radiant intensity at ≥3 V drive are required |
| TLDR5401 | Identical mechanical form and pinout, but GaAsP on GaP with higher IV (2–4 mcd @ 2 mA) and same VF range | Delivers brighter indication at same current - may require resistor adjustment to avoid oversaturation in dim environments | Choose TLDR5401 when enhanced visibility is prioritized over strict current budget constraints |
Compared with TLHR5401 and TLDR5401, the TLLR5401 offers the lowest drive-current dependency and most balanced VF/IV trade-off for 2 mA–optimized systems, making it ideal for legacy 3.3 V microcontroller GPIO-driven indicators where resistor tolerance and supply variation must be accommodated.
Availability
TLLR5401 is available at Aetrix Electronics and suitable for industrial control panel indicators, portable diagnostic device status lights, automotive dashboard warning lights, and IoT sensor node link activity indicators requiring stable component supply and long-lifecycle availability.
Supply support for TLLR5401 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, founded in 1962 and headquartered in Malvern, PA, with engineering centers worldwide.
The TLLR5401 belongs to Vishay's low-current LED product line, engineered specifically for energy-efficient visual indication in battery-powered, space-constrained, and thermally unmanaged electronic systems.
FAQ
What is the recommended forward current for continuous operation of the TLLR5401?
The TLLR5401 is specified at 2 mA for luminous intensity testing and rated for continuous DC forward current up to 7 mA. For reliable long-term operation with minimal thermal stress, Vishay recommends operating at or below 2 mA - the condition under which all optical parameters (luminous intensity, wavelength, viewing angle) are guaranteed. Exceeding 2 mA increases power dissipation and may shift chromaticity, though not exceeding 7 mA avoids permanent degradation.
Does the TLLR5401 have a built-in current-limiting resistor?
No, the TLLR5401 is a bare LED die in a 5 mm package with no integrated current-limiting resistor. External series resistance must be calculated based on supply voltage and desired forward current - for example, a 3.3 V supply driving the TLLR5401 at 2 mA requires approximately 700 Ω (using VF = 1.9 V typical). This design flexibility allows precise current tuning across varying voltage rails and thermal conditions.
Can the TLLR5401 be used in outdoor applications exposed to UV or moisture?
The TLLR5401 features a tinted diffused epoxy lens rated for indoor use and is not IP-rated or UV-stabilized. While its operating temperature range (–40 °C to +100 °C) supports harsh ambient conditions, prolonged UV exposure may yellow the lens and reduce light output over time. For outdoor applications, Vishay recommends conformal coating or secondary enclosure protection - the TLLR5401 itself is not qualified for unshielded outdoor deployment.
What is the meaning of "IVmin/IVmax ≤ 0.5" in the TLLR5401 packaging specification?
This specification means that within a single packing unit (e.g., tape reel or bulk bag), the ratio of minimum-to-maximum luminous intensity among devices is ≤0.5 - i.e., the brightest unit emits no more than twice the light of the dimmest unit. This tight binning ensures consistent visual appearance across multiple TLLR5401 units installed in the same user interface, critical for professional-grade equipment where uniform LED brightness is expected.
Is the TLLR5401 RoHS-compliant and halogen-free?
Yes, the TLLR5401 complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document #99912). The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and bromine/chlorine content is below 900 ppm - verified through certified material declarations and supplier audits.
TLLR5401 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- Radial
- Packaging:
- Bulk
- Product Status:
- Active
- Color:
- Red
- Configuration:
- Standard
- Lens Color:
- -
- Lens Transparency:
- Diffused
- Millicandela Rating:
- 2mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 5.80mm Dia
- Voltage - Forward (Vf) (Typ):
- 1.9V
- Current - Test:
- 2mA
- Viewing Angle:
- 50°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 619nm
- Wavelength - Peak:
- 635nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1 3/4
- Size / Dimension:
- -
TLLR5401 FAQ
1.How can I place an order for TLLR5401 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLLR5401 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 TLLR5401 reliable?
The price and inventory of TLLR5401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLLR5401 is usually 5 days.
3.What payment methods are accepted for TLLR5401?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLLR5401 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLLR5401?
TLLR5401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLLR5401 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 TLLR5401?
For technical support, including TLLR5401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLLR5401 requirements.
6.How does Aetrix verify that TLLR5401 is sourced from the original manufacturer or authorized distributors?
All TLLR5401 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 TLLR5401 meets industry standards.
7.What is the process for return or replacement of TLLR5401?
All TLLR5401 units undergo pre-shipment inspection (PSI). If there is an issue with TLLR5401, 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 TLLR5401 part is unused and in its original packaging.
Return procedure for TLLR5401:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLLR5401 Tags
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LTST-C281KRKT
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150060GS75000
Würth Elektronik
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150060VS75000
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150060AS75000
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150060YS75000
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150060SS75000
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150060BS75000
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151031VS06000
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151033RS03000
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150080BS75000
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150080GS75000
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150141GS73100
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