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Vishay Semiconductor Opto Division TLHK42S1T2
- Part No.:
- TLHK42S1T2
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLHK42S1T2.pdf
- Description:
- LED RED CLEAR T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:4,932
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Product details
Overview
TLHK42S1T2 from Vishay Semiconductors is a high-intensity red AlInGaP-on-GaAs LED in a standard Ø3 mm (T-1) non-diffused tinted package, delivering 180–450 mcd luminous intensity at 20 mA, with dominant wavelength 630 nm, forward voltage 1.9–2.6 V, and ±22° viewing angle-designed for status indication and legend lighting where directional brightness and color consistency are critical.
For engineers reviewing the TLHK42S1T2 datasheet, TLHK42S1T2 pinout, TLHK42S1T2 application, or TLHK42S1T2 equivalent, key selection considerations include luminous intensity binning (S/T groups), narrow viewing angle for localized illumination, DC/high-peak-current operation capability, thermal resistance (400 K/W), and compatibility with standard through-hole PCB mounting in industrial indicator assemblies.
Technical Context
This device uses AlInGaP epitaxial structure grown on GaAs substrate to achieve high radiant efficiency in the red spectrum (630 nm dominant, 643 nm peak). Its non-diffused lens and ±22° half-intensity angle enable focused beam control without secondary optics.
Rated for 30 mA DC forward current and 100 °C junction temperature, the TLHK42S1T2 supports stable operation across –40 to +100 °C ambient range. Junction capacitance is 15 pF at 0 V, supporting fast switching in pulsed indicator applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 180–450 mcd at 20 mA - defines visible brightness level for human-readable status indication under standard drive conditions |
| Dominant wavelength | 630 nm - specifies precise red chromaticity compliant with IEC 62471 eye-safety and color-coding standards |
| Viewing angle | ±22° half-intensity - enables targeted illumination with minimal light spill, reducing need for mechanical baffles |
| Forward voltage | 1.9–2.6 V at 20 mA - determines minimum supply headroom and series resistor sizing for constant-current drive |
| Junction-to-ambient Rth | 400 K/W - sets maximum allowable power dissipation (80 mW) before thermal derating at elevated ambient temperatures |
| Reverse voltage | 5 V - defines maximum allowable reverse bias during multiplexed or AC-coupled driving schemes |
| Surge current | 100 mA for ≤10 μs - supports brief overcurrent pulses in strobe or test-mode signaling |
Pinout & Package
Standard 2-pin through-hole Ø3 mm (T-1) package with cathode flat and anode lead. Package dimensions: body Ø3.2 ±0.15 mm, length 5.8 ±0.3 mm, lead spacing 2.54 mm nominal. Leads are tin-plated copper alloy, compatible with wave and hand soldering (260 °C, 5 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (longer lead) | Positive current input | Must be connected to current-limiting resistor or constant-current source; polarity reversal prevents conduction |
| Cathode (shorter lead, flat side) | Current return / ground reference | Identified by flat edge on lens housing; serves as common return path in multi-LED arrays |
Key Features
| Feature | Design Value |
|---|---|
| AlInGaP-on-GaAs die technology | Delivers higher quantum efficiency and lower forward voltage than traditional GaAsP red LEDs, improving power efficiency in battery-powered indicators |
| Luminous intensity binning (S/T groups) | Ensures consistent brightness across production lots-critical for uniform panel appearance in OEM equipment interfaces |
| Non-diffused clear lens | Maintains high optical coupling efficiency and directional output, enabling use in tight-space front-panel designs without secondary collimation |
| DC and high-peak-current operation | Supports both steady-state status lights (30 mA DC) and pulsed readout functions (100 mA surge), extending design flexibility |
| Color categorization per bag | Each packaging unit contains only one wavelength group-eliminates manual sorting and ensures repeatable color matching in assembly |
Applications
| Status Indication | Legend Illumination |
|---|---|
Use Scenario: Front-panel power-on, fault, or mode-status light on industrial control panels and medical devices. IC Role / Device Role / Timing Role: Visual status emitter requiring high contrast, long life, and stable chromaticity under continuous DC drive. Use Value: ±22° viewing angle concentrates light toward operator line-of-sight; 180–450 mcd range ensures visibility in ambient light up to 10,000 lux. | Use Scenario: Backlighting engraved or printed legends on membrane switches and control overlays. IC Role / Device Role / Timing Role: Directional point-source illuminator aligned with legend apertures to minimize bleed and maximize contrast. Use Value: Non-diffused lens and narrow beam preserve spatial resolution-enabling sharp, well-defined legend edges without halo effects. |
| Readout Lighting | Maintenance Indicator |
Use Scenario: Localized illumination of analog meter scales or digital display segments in test equipment. IC Role / Device Role / Timing Role: Low-power, high-brightness auxiliary light source synchronized with measurement cycles. Use Value: 15 pF junction capacitance allows clean turn-on/turn-off transitions at >10 kHz pulse rates-supporting flicker-free strobed readout. | Use Scenario: Service-mode indicator on network infrastructure hardware (e.g., switch port activity, fan status). IC Role / Device Role / Timing Role: Long-life visual cue operating continuously at elevated ambient temperatures (up to +100 °C). Use Value: 100 °C max junction temperature and 400 K/W thermal resistance ensure reliability in enclosed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar red LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLHR42S1T2 | Same package and optical specs, but rated for 50 mA DC forward current (vs. 30 mA); higher VF range (2.0–2.7 V) | Better suited for high-brightness, high-reliability applications where thermal margin is available | Select TLHR42S1T2 when system-level thermal design supports >30 mA continuous drive and higher luminous output is required |
| TLHK42S2T2 | Identical construction and binning, but specified for 25 mA test current (not 20 mA); luminous intensity range shifted to 224–355 mcd | Targeted at mid-brightness applications where tighter intensity tolerance is prioritized over maximum output | Choose TLHK42S2T2 when consistent mid-range brightness across batches is preferred over top-end intensity |
Compared with TLHR42S1T2 and TLHK42S2T2, the TLHK42S1T2 offers the optimal balance of luminous intensity (180–450 mcd), thermal robustness (100 °C Tj), and low forward voltage (1.9–2.6 V) for general-purpose industrial status lighting where drive current is limited to 30 mA.
Availability
TLHK42S1T2 is available at Aetrix Electronics and suitable for status lights, legend illumination, readout lighting, and maintenance indicators requiring stable component supply, consistent color binning, and long-term manufacturability in through-hole LED applications.
Supply support for TLHK42S1T2 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 leader in discrete semiconductors and passive components, specializing in high-reliability, application-optimized devices for industrial, automotive, and computing markets.
The TLHK42S1T2 belongs to Vishay's standard-series high-intensity LED product line, engineered specifically for precision visual indication in harsh environments where brightness consistency, thermal stability, and long operational life are mandatory.
FAQ
What is the luminous intensity range of the TLHK42S1T2 and how is it binned?
The TLHK42S1T2 has a luminous intensity range of 180–450 mcd at 20 mA, categorized into S (180–280 mcd) and T (280–450 mcd) groups. Each shipping bag contains only one intensity group-no mixing-to ensure uniform appearance in panel assemblies. The TLHK42S1T2 is shipped pre-binned per IEC/EN 62471 requirements.
Does the TLHK42S1T2 support pulsed operation, and what are its surge limits?
Yes, the TLHK42S1T2 supports pulsed operation with a surge forward current rating of 100 mA for pulse widths ≤10 μs. This enables strobing, multiplexing, and test-mode signaling without degradation. The TLHK42S1T2 maintains stable optical output under these conditions due to its low junction capacitance (15 pF) and robust AlInGaP-on-GaAs die structure.
What is the thermal resistance and maximum junction temperature of the TLHK42S1T2?
TLHK42S1T2 has a junction-to-ambient thermal resistance of 400 K/W and a maximum junction temperature of 100 °C. These values define its safe operating area: at 30 mA DC and 2.6 V VF, power dissipation is 78 mW, requiring ambient temperatures ≤60 °C for full-rated operation. Derating is required above that ambient, per the datasheet curves.
How does the ±22° viewing angle of the TLHK42S1T2 affect its optical performance?
The ±22° half-intensity viewing angle provides a narrow, directional beam ideal for front-panel indicators where light must be confined to the operator's line of sight. This minimizes glare, reduces crosstalk between adjacent LEDs, and eliminates need for external masks or collimators-directly improving contrast and readability in TLHK42S1T2-based status displays.
Is the TLHK42S1T2 RoHS-compliant and halogen-free?
Yes, the TLHK42S1T2 complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document 99912). All materials-including leadframe, molding compound, and die attach-are verified for restricted substance content. Compliance documentation is available upon request for the TLHK42S1T2.
TLHK42S1T2 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:
- Clear
- Millicandela Rating:
- 315mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 1.9V
- Current - Test:
- 20mA
- Viewing Angle:
- 44°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 630nm
- Wavelength - Peak:
- 643nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1
- Size / Dimension:
- -
TLHK42S1T2 FAQ
1.How can I place an order for TLHK42S1T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLHK42S1T2 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 TLHK42S1T2 reliable?
The price and inventory of TLHK42S1T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLHK42S1T2 is usually 5 days.
3.What payment methods are accepted for TLHK42S1T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLHK42S1T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLHK42S1T2?
TLHK42S1T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLHK42S1T2 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 TLHK42S1T2?
For technical support, including TLHK42S1T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLHK42S1T2 requirements.
6.How does Aetrix verify that TLHK42S1T2 is sourced from the original manufacturer or authorized distributors?
All TLHK42S1T2 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 TLHK42S1T2 meets industry standards.
7.What is the process for return or replacement of TLHK42S1T2?
All TLHK42S1T2 units undergo pre-shipment inspection (PSI). If there is an issue with TLHK42S1T2, 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 TLHK42S1T2 part is unused and in its original packaging.
Return procedure for TLHK42S1T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLHK42S1T2 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
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