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Vishay Semiconductor Opto Division TLHY4401
- Part No.:
- TLHY4401
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLHY4401.pdf
- Description:
- LED YELLOW DIFFUSED T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
TLHY4401 from Vishay Semiconductors is a high-efficiency yellow LED in a standard Ø3 mm tinted diffused plastic package (T-1), delivering 2.5–10.5 mcd luminous intensity at 10 mA, with dominant wavelength 581–594 nm and forward voltage 2.4–3.0 V at 20 mA. It serves as an on/off indicator or status light in industrial control panels and instrumentation interfaces.
For engineers reviewing the TLHY4401 datasheet, TLHY4401 pinout, TLHY4401 application, or TLHY4401 equivalent, key selection criteria include luminous intensity binning (N-group: 2.5–5 mcd), ±30° viewing angle, DC/high-peak-current capability, and GaAsP-on-GaP chip technology for stable yellow emission under ambient temperature ranges from –40 °C to +100 °C.
Technical Context
The TLHY4401 uses a GaAsP-on-GaP semiconductor structure optimized for visible yellow emission, with dominant wavelength tightly binned across 581–594 nm. Its Ø3 mm tinted diffused package provides uniform angular distribution and high on-off contrast.
Rated for 30 mA DC forward current and 1 A surge current (tp ≤ 10 μs), it operates within –40 °C to +100 °C ambient range and exhibits thermal resistance of 400 K/W junction-to-ambient. Luminous intensity is measured at 10 mA pulse (25 ms), and devices are shipped in single-intensity groups per bag (N-group: 2.5–5 mcd).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 2.5–10.5 mcd at 10 mA - defines visibility level in low-ambient-light status indication |
| Dominant wavelength | 581–594 nm - ensures consistent yellow chromaticity across production lots |
| Forward voltage | 2.4–3.0 V at 20 mA - determines series resistor sizing for 5 V or 3.3 V logic-driven circuits |
| Viewing angle | ±30° half-intensity - enables wide-angle visibility without hot-spotting in panel-mount applications |
| Absolute max forward current | 30 mA DC - sets upper limit for continuous drive without derating below 60 °C ambient |
| Junction temperature | 100 °C - constrains thermal design when operating at full rated current in enclosed enclosures |
| Reverse voltage | 6 V - defines minimum protection diode rating needed for reverse-polarity safeguarding |
Pinout & Package
TLHY4401 is housed in a standard Ø3 mm (T-1) tinted diffused plastic package with axial leads. Cathode is identified by shorter lead and/or flat edge on lens housing per Vishay mechanical drawing 6.544-5255.01-4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (longer lead) | Positive terminal | Connected to current-limiting resistor; polarity must match supply rail |
| Cathode (shorter lead / flat edge) | Negative terminal | Typically tied to ground or driver sink node; reverse connection blocks conduction |
Key Features
| Feature | Design Value |
|---|---|
| Standard Ø3 mm (T-1) package | Enables drop-in replacement in legacy 3 mm LED sockets and PCB footprints |
| Luminous intensity binning (N-group) | Guarantees 2.5–5 mcd consistency per bag-critical for uniform appearance in multi-LED arrays |
| Wide ±30° viewing angle | Eliminates need for secondary optics in front-panel indicators; supports 120° total visibility cone |
| Suitable for DC and high peak current | Supports 30 mA continuous drive and 1 A transient pulses-ideal for multiplexed or PWM-driven displays |
| Tinted diffused lens | Provides soft, glare-free emission with high on-off contrast-enhances readability in variable lighting |
Applications
| Status Indicator | Instrumentation Readout |
|---|---|
Use Scenario: Front-panel power-on or fault-status indication on industrial PLCs and motor drives. IC Role / Device Role / Timing Role: Discrete visual emitter providing binary state feedback without microcontroller involvement. Use Value: High on-off contrast and ±30° viewing angle ensure clear visibility across operator positions without backlighting. |
Use Scenario: Numeric or alphanumeric display backlighting in handheld test meters and multimeters. IC Role / Device Role / Timing Role: Edge-lit or direct illumination source synchronized to segment activation timing. Use Value: Stable 581–594 nm yellow output maintains color fidelity under battery-voltage droop and temperature drift. |
| Control Panel Legend Light | Maintenance Access Indicator |
Use Scenario: Illuminated labeling of pushbuttons, toggle switches, and function keys on HVAC or building automation panels. IC Role / Device Role / Timing Role: Low-power steady-state emitter driven directly from 3.3 V or 5 V rails via fixed resistor. Use Value: Tinted diffused lens delivers even, non-dazzling glow that preserves label legibility over 50,000-hour lifetime. |
Use Scenario: Service-mode activation light inside telecom cabinets or server rack enclosures. IC Role / Device Role / Timing Role: Maintenance-triggered visual flag indicating diagnostic mode entry or firmware update readiness. Use Value: N-group intensity binning ensures consistent brightness across multiple units-avoiding mismatched indicators during field servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar yellow LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLHY4400 | Luminous intensity: 1.6–10 mcd (L-group, lower brightness tier) | Suitable where reduced visibility suffices-e.g., internal board-level indicators not viewed directly | Select TLHY4400 when lower power consumption or cost sensitivity outweighs brightness requirements. |
| TLHY4405 | Luminous intensity: 6.3–11 mcd (P-group, higher brightness tier) | Better suited for outdoor-facing or high-ambient-light environments requiring >6 mcd minimum | Choose TLHY4405 when panel operation occurs under daylight or brightly lit factory floors. |
Compared with TLHY4401, TLHY4400 offers lower intensity for energy-constrained designs, while TLHY4405 delivers higher visibility in demanding lighting conditions-both share identical package, wavelength, and electrical ratings, enabling same-footprint upgrades or downgrades.
Availability
TLHY4401 is available at Aetrix Electronics and suitable for industrial control panels, instrumentation readouts, and maintenance access indicators requiring stable component supply, consistent luminous intensity binning, and long-term manufacturing continuity.
Supply support for TLHY4401 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 semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in optoelectronics reliability and binning precision.
The TLHY4401 belongs to Vishay's TLH.44.. series of standard-indicator LEDs, designed specifically for general-purpose status, legend, and readout lighting where color consistency, wide viewing angle, and mechanical interchangeability are prioritized.
FAQ
What is the luminous intensity range of TLHY4401 at 10 mA?
The TLHY4401 has a luminous intensity range of 2.5–10.5 mcd at 10 mA, corresponding to the N-group binning classification per Vishay's specification document 83006. This range ensures consistent brightness across units shipped together, supporting uniform appearance in multi-LED applications such as control panel legends and status arrays. The TLHY4401 is tested using a 25 ms current pulse under standard conditions.
What is the dominant wavelength specification for TLHY4401?
The dominant wavelength of TLHY4401 is specified as 581–594 nm at 10 mA, placing it firmly in the yellow portion of the visible spectrum. This range is verified per the product group's wavelength binning structure and ensures chromatic consistency across production lots. The TLHY4401 uses GaAsP-on-GaP technology to achieve this stable yellow emission without phosphor conversion.
Does TLHY4401 support pulsed operation, and what is its peak current rating?
Yes, TLHY4401 supports high peak current operation with a maximum surge forward current (IFSM) of 1 A for pulse widths ≤10 μs. This makes it suitable for multiplexed displays and PWM-driven indicators where average current remains low but instantaneous drive must be robust. The TLHY4401 maintains reliability under these conditions due to its GaAsP-on-GaP die construction and thermal resistance of 400 K/W.
What is the viewing angle of TLHY4401, and how does it affect panel design?
The TLHY4401 has a viewing angle of ±30° at half intensity, resulting in a total 120° cone of usable light output. This wide dispersion eliminates the need for external diffusers or reflectors in front-panel applications and ensures visibility across broad operator angles. The TLHY4401's tinted diffused lens further enhances uniformity, making it ideal for legend lighting and status indicators where consistent off-axis brightness matters.
How is cathode identification implemented on TLHY4401?
The cathode of TLHY4401 is identified by the shorter lead and/or a flat edge on the lens housing, per Vishay mechanical drawing 6.544-5255.01-4. This dual marking method ensures unambiguous polarity recognition during manual assembly or automated placement. Correct orientation is essential-reverse bias beyond 6 V may damage the device, and forward conduction only occurs when anode is positive relative to cathode.
TLHY4401 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- TLH.44
- Package/Case:
- Radial
- Packaging:
- Bulk
- Product Status:
- Active
- Color:
- Yellow
- Configuration:
- Standard
- Lens Color:
- -
- Lens Transparency:
- Diffused
- Millicandela Rating:
- 10.5mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 2.4V
- Current - Test:
- 10mA
- Viewing Angle:
- 60°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 588nm
- Wavelength - Peak:
- 585nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1
- Size / Dimension:
- -
TLHY4401 FAQ
1.How can I place an order for TLHY4401 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLHY4401 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 TLHY4401 reliable?
The price and inventory of TLHY4401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLHY4401 is usually 5 days.
3.What payment methods are accepted for TLHY4401?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLHY4401 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLHY4401?
TLHY4401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLHY4401 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 TLHY4401?
For technical support, including TLHY4401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLHY4401 requirements.
6.How does Aetrix verify that TLHY4401 is sourced from the original manufacturer or authorized distributors?
All TLHY4401 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 TLHY4401 meets industry standards.
7.What is the process for return or replacement of TLHY4401?
All TLHY4401 units undergo pre-shipment inspection (PSI). If there is an issue with TLHY4401, 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 TLHY4401 part is unused and in its original packaging.
Return procedure for TLHY4401:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLHY4401 Tags
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