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Vishay Semiconductor Opto Division TLHY4400
- Part No.:
- TLHY4400
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLHY4400.pdf
- Description:
- LED YELLOW DIFFUSED T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:11,785
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Product details
Overview
TLHY4400 from Vishay Semiconductors is a yellow light-emitting diode (LED) in a 3 mm tinted diffused plastic package (T-1), delivering 10 mcd typical luminous intensity at 10 mA, with dominant wavelength 581–594 nm and ±30° viewing angle. It operates with 2.4 V typical forward voltage at 20 mA and supports DC and pulsed drive for status indication in industrial control panels.
For engineers reviewing the TLHY4400 datasheet, TLHY4400 pinout, TLHY4400 application, or TLHY4400 equivalent, key selection criteria include luminous intensity binning (M group: 1.6–3.2 mcd), wavelength categorization (Group 1–6), thermal resistance (400 K/W), and compatibility with standard 3 mm LED mounting and wave-soldering processes.
Technical Context
The TLHY4400 uses GaAsP-on-GaP epitaxial technology to produce yellow light with stable spectral output across temperature. Its ±30° half-intensity angle enables uniform illumination over wide front-panel areas without secondary optics.
Rated for 30 mA DC forward current and 1 A surge (10 μs), it sustains operation from –40 °C to +100 °C ambient and exhibits 50 pF junction capacitance - suitable for low-speed indicator signaling, not high-frequency modulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 1.6–10 mcd min–typ at 10 mA; defines visible brightness level under standard test conditions for human-perceived on/off contrast |
| Dominant wavelength | 581–594 nm; specifies yellow chromaticity within CIE 1931 color space for consistent color matching across batches |
| Forward voltage | 2.4 V typ at 20 mA; determines series resistor value needed for constant-current biasing in 3.3 V or 5 V systems |
| Viewing angle | ±30° half-intensity; ensures ≥50% luminous intensity within 60° cone, enabling wide-angle visibility without lensing |
| Absolute max forward current | 30 mA DC; sets upper limit for continuous drive to avoid thermal degradation and lumen depreciation |
| Junction-to-ambient thermal resistance | 400 K/W; indicates heat dissipation capability in free-air; limits power derating above 60 °C ambient |
| Reverse voltage | 6 V; defines maximum allowable reverse-bias voltage before leakage or breakdown compromises reliability |
Pinout & Package
TLHY4400 is a two-terminal through-hole LED in standard Ø 3 mm (T-1) tinted diffused plastic package per DIN drawing 6.544-5255.01-4. Cathode is identified by flat side on housing and shorter lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (longer lead) | Positive terminal | Connected to current source or microcontroller GPIO via current-limiting resistor; polarity must be observed to enable conduction |
| Cathode (shorter lead, flat side) | Negative terminal | Connected to ground or sink driver; reverse connection blocks light emission and risks damage if reverse voltage exceeds 6 V |
Key Features
| Feature | Design Value |
|---|---|
| Standard T-1 (Ø 3 mm) package | Enables drop-in replacement in legacy 3 mm LED footprints and compatibility with automated insertion and wave-soldering equipment |
| Luminous intensity binning (M group) | Guarantees 1.6–3.2 mcd range within one packaging unit, eliminating visible brightness mismatch in multi-LED arrays |
| Wavelength grouping (Groups 1–6) | Ensures consistent yellow hue across production lots; Group 1 = 581–584 nm, Group 6 = 591–594 nm |
| Wide ±30° viewing angle | Provides high on-off contrast without collimating optics, reducing bill-of-materials and assembly steps in panel-mount indicators |
| DC and high peak current capability | Supports 30 mA continuous or 1 A transient pulses (≤10 μs), enabling multiplexed driving schemes in shared-segment displays |
Applications
| Status lights | Off / on indicator |
|---|---|
Use Scenario: Front-panel power or fault status indication on industrial PLC modules and power supplies. IC Role / Device Role / Timing Role: Visual status emitter - no timing or logic function; driven statically or via GPIO toggle. Use Value: High on-off contrast from diffused tinted lens ensures readability under ambient lighting up to 10,000 lux. |
Use Scenario: System-ready or user-input confirmation in medical device UIs and test equipment. IC Role / Device Role / Timing Role: Steady-state optical signal generator; no internal intelligence or interface protocol. Use Value: M-group intensity binning prevents adjacent LEDs from appearing mismatched during simultaneous activation. |
| Background illumination | Readout lights |
Use Scenario: Backlighting of membrane switch legends or segmented LCD overlays in automotive dashboards. IC Role / Device Role / Timing Role: Constant-current illuminated element; driven at ≤20 mA for thermal stability. Use Value: 581–594 nm yellow output avoids blue-light hazard concerns while maintaining CIE photopic sensitivity >70%. |
Use Scenario: Localized illumination of analog meter scales or digital display digits in handheld instruments. IC Role / Device Role / Timing Role: Directional light source mounted behind translucent bezel or diffuser plate. Use Value: ±30° viewing angle matches typical 15–25 mm LED-to-scale distance, delivering uniform brightness across 20 mm target area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar yellow LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLHY4401 | 2.5–10.5 mcd typical intensity (N group); otherwise identical wavelength, VF, and package | Suitable where higher baseline brightness is required without changing PCB layout or drive circuit | Select TLHY4401 when >10 mcd typical output is needed; same thermal and electrical interface |
| TLHY4405 | 6.3–11 mcd typical intensity (P group); same λd, VF, and package dimensions | Preferred for high-ambient-light environments (e.g., outdoor kiosks) requiring greater luminance margin | Choose TLHY4405 for applications demanding >6 mcd minimum intensity; verify current-limiting resistor recalibration |
Compared with TLHY4400, TLHY4401 offers ~5% higher typical luminous intensity while retaining identical spectral, thermal, and mechanical specs; TLHY4405 doubles minimum intensity but requires revalidation of forward current compliance in existing drive circuits.
Availability
TLHY4400 is available at Aetrix Electronics and suitable for industrial HMI status lights, medical device indicators, and test equipment readout illumination requiring stable component supply, batch-to-batch color consistency, and long-term obsolescence management.
Supply support for TLHY4400 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 designs discrete semiconductors and passive components with emphasis on reliability, precision, and industrial-grade performance.
The TLHY4400 belongs to Vishay's TLH.44.. series of standard-indicator LEDs, engineered for general-purpose visual signaling in harsh environments where mechanical robustness and optical uniformity are critical.
FAQ
What is the luminous intensity specification for TLHY4400?
The TLHY4400 has a minimum luminous intensity of 1.6 mcd and typical value of 10 mcd at 10 mA forward current, categorized in the M group (1.6–3.2 mcd). This binning ensures consistent brightness within a single packaging unit, critical for uniform appearance in multi-LED panels. The measurement uses a 25 ms pulse per Vishay specification 83006.
What is the forward voltage range of TLHY4400 at 20 mA?
The TLHY4400 exhibits a forward voltage range of 2.4 V (typical) to 3.0 V (maximum) at 20 mA DC forward current. This allows direct compatibility with common 3.3 V and 5 V logic-supply rails when paired with an appropriate current-limiting resistor. The 2.4 V typical value simplifies resistor calculation for stable biasing.
Does TLHY4400 support pulsed operation, and what are the limits?
Yes, TLHY4400 supports pulsed operation with a surge forward current rating of 1 A for pulse widths ≤10 μs. This enables time-multiplexed driving in multi-LED arrays without thermal overload. Duty cycle and ambient temperature must remain within absolute maximum ratings - specifically, junction temperature must not exceed 100 °C.
How is wavelength binned for TLHY4400, and why does it matter?
TLHY4400 is binned into wavelength groups 1–6 (e.g., Group 1: 581–584 nm; Group 6: 591–594 nm), ensuring tight dominant wavelength control across production lots. This matters for applications requiring precise yellow hue matching - such as regulatory-compliant status colors or multi-color coding schemes - where even 3 nm variation affects human-perceived color fidelity.
What is the package type and mechanical outline for TLHY4400?
TLHY4400 uses a standard Ø 3 mm (T-1) tinted diffused plastic package conforming to DIN drawing 6.544-5255.01-4. Dimensions include 3.4 ± 0.15 mm body height, 4.4 ± 0.3 mm shoulder diameter, and 5.8 ± 0.3 mm total length. Cathode identification is via flat side and shorter lead - critical for correct PCB orientation and automated assembly.
TLHY4400 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:
- 10mcd
- 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:
- -
TLHY4400 FAQ
1.How can I place an order for TLHY4400 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLHY4400 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 TLHY4400 reliable?
The price and inventory of TLHY4400 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLHY4400 is usually 5 days.
3.What payment methods are accepted for TLHY4400?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLHY4400 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLHY4400?
TLHY4400 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLHY4400 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 TLHY4400?
For technical support, including TLHY4400 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLHY4400 requirements.
6.How does Aetrix verify that TLHY4400 is sourced from the original manufacturer or authorized distributors?
All TLHY4400 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 TLHY4400 meets industry standards.
7.What is the process for return or replacement of TLHY4400?
All TLHY4400 units undergo pre-shipment inspection (PSI). If there is an issue with TLHY4400, 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 TLHY4400 part is unused and in its original packaging.
Return procedure for TLHY4400:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLHY4400 Tags
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150060GS75000
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150060VS75000
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150060YS75000
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150060SS75000
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150060BS75000
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151031VS06000
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150080BS75000
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