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Vishay Semiconductor Opto Division TLHY4400-AS12Z
- Part No.:
- TLHY4400-AS12Z
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLHY4400-AS12Z.pdf
- Description:
- LED YELLOW DIFFUSED T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:2,144
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Product details
Overview
TLHY4400-AS12Z from Vishay Semiconductors is a yellow light-emitting diode (LED) in a 3 mm tinted diffused plastic package, delivering 1.6–10 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.
For engineers reviewing the TLHY4400-AS12Z datasheet, TLHY4400-AS12Z pinout, TLHY4400-AS12Z application, or TLHY4400-AS12Z equivalent, key selection criteria include luminous intensity binning, ±30° viewing angle, DC/high-peak-current capability, and compatibility with standard 3 mm LED mounting and wave-soldering processes.
Technical Context
The TLHY4400-AS12Z uses GaAsP-on-GaP semiconductor technology to emit yellow light with tightly controlled dominant wavelength (581–594 nm) and high on-off contrast enabled by its wide ±30° viewing angle. Its tinted diffused lens ensures uniform illumination without hotspots.
Rated for continuous DC operation and pulsed currents up to 1 A (tp ≤ 10 μs), it supports ambient temperatures from –40 °C to +100 °C and features thermal resistance of 400 K/W. Reverse voltage rating is 6 V, and junction capacitance is 50 pF at 0 V and 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 1.6–10 mcd at 10 mA - defines visible brightness level under standard test current for status indication |
| Dominant wavelength | 581–594 nm - specifies yellow chromaticity suitable for color-coded status signaling |
| Forward voltage | 2.4–3.0 V at 20 mA - determines series resistor value and power dissipation in driver circuit |
| Viewing angle | ±30° - enables broad visibility across panel surfaces without directional aiming |
| Absolute max forward current | 30 mA DC - sets upper limit for continuous drive without degradation |
| Reverse voltage | 6 V - defines maximum allowable reverse bias before leakage or breakdown |
| Junction temperature | 100 °C - constrains thermal design margin in enclosed or high-ambient environments |
Pinout & Package
TLHY4400-AS12Z is housed in a standard Ø3 mm (T-1) tinted diffused plastic package with axial leads. The device has two terminals: anode and cathode, oriented per tape code "AS12Z" indicating cathode-first feed direction in ammopack packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal | Connected to current source or higher potential; must be biased >2.4 V above cathode to emit light |
| Cathode | Negative terminal | Connected to ground or current sink; polarity reversal blocks conduction and prevents emission |
Key Features
| Feature | Design Value |
|---|---|
| Standard Ø3 mm (T-1) package | Ensures mechanical compatibility with legacy LED sockets, PCB cutouts, and automated assembly tooling |
| Wide ±30° viewing angle | Provides consistent brightness across 60° cone, eliminating need for precise optical alignment in panel layouts |
| Luminous intensity binning | Groups LEDs by measured output (e.g., L group: 1–2 mcd), enabling uniform appearance in multi-LED arrays |
| Tinted diffused lens | Softens emission profile and suppresses glare, improving readability under varied ambient lighting |
| DC and high-peak-current rated | Supports both steady-state indicators and pulsed signaling (e.g., blink patterns) without derating |
Applications
| Status Indicator | Instrument Panel Light |
|---|---|
Use Scenario: Visual confirmation of system power-up, fault condition, or mode selection on front-panel interfaces. IC Role / Device Role / Timing Role: Discrete optoelectronic indicator providing human-readable state feedback independent of microcontroller GPIO timing. Use Value: High on-off contrast and diffused output ensure legibility under direct sunlight or low-light conditions without auxiliary optics. |
Use Scenario: Backlighting of analog meter scales, digital display legends, or control knob markings in test equipment. IC Role / Device Role / Timing Role: Passive illumination source driven by simple constant-current circuitry; no timing or data interface required. Use Value: Yellow chromaticity (581–594 nm) offers optimal eye sensitivity and differentiation from red/green warning lights in mixed-color panels. |
| Maintenance Access Light | Legend Illumination |
Use Scenario: Localized lighting inside enclosures during servicing-e.g., illuminating terminal blocks or jumper settings. IC Role / Device Role / Timing Role: Low-power, mechanically robust indicator mounted directly on PCB near service points. Use Value: 30 mA absolute max rating and –40 °C to +100 °C operating range support reliable operation in unconditioned industrial cabinets. |
Use Scenario: Edge-lit labeling of pushbuttons, switches, or function keys on operator interfaces. IC Role / Device Role / Timing Role: Surface-mounted or through-hole discrete emitter aligned beneath translucent legend overlays. Use Value: Tinted diffused package minimizes internal reflections and provides even edge glow without secondary light guides. |
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-AS12Z | Higher typical luminous intensity (10.5 mcd vs. 10 mcd at 10 mA) | Better suited for applications requiring greater brightness at same drive current | Select when higher visibility is needed without increasing current or changing thermal layout |
| TLHY4405-AS12 | Higher luminous intensity (6.3–11 mcd) and same package; no "Z" ammopack suffix | Designed for cost-sensitive volume production where tape orientation flexibility is not required | Choose for automated placement where cathode-first feed is acceptable and binning tolerance allows broader intensity range |
Compared with TLHY4400-AS12Z, TLHY4401-AS12Z delivers ~5% higher typical output for enhanced visibility, while TLHY4405-AS12 trades tighter intensity binning for higher base output and simplified packaging-both retain identical optical, thermal, and electrical behavior within their respective groups.
Availability
TLHY4400-AS12Z is available at Aetrix Electronics and suitable for industrial HMI panels, test equipment status displays, and maintenance-access lighting requiring stable component supply and long-term obsolescence management.
Supply support for TLHY4400-AS12Z 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 optoelectronics, power devices, and sensing solutions for industrial and automotive markets.
The TLHY4400-AS12Z belongs to Vishay's TLH.44.. series of standard 3 mm LEDs, engineered for general-purpose indicating and lighting where consistent color, wide viewing angle, and mechanical interchangeability are prioritized over ultra-high efficiency or narrow spectral bandwidth.
FAQ
What is the viewing angle specification for TLHY4400-AS12Z?
The TLHY4400-AS12Z has an angle of half intensity of ±30°, meaning luminous intensity drops to 50% of its peak value at 30° off-axis in both directions. This results in a total viewing cone of 60°, supporting broad visibility without directional aiming in panel-mount applications.
Does TLHY4400-AS12Z require current-limiting circuitry?
Yes, TLHY4400-AS12Z requires external current limiting-typically a series resistor-to maintain forward current at or below 30 mA DC. At 20 mA, its forward voltage is 2.4–3.0 V; calculating resistor value using supply voltage minus VF ensures stable operation and avoids thermal overstress.
What does the "AS12Z" suffix indicate in TLHY4400-AS12Z?
The "AS12Z" suffix denotes ammopack packaging with cathode-first tape feed direction ("12") and Z-style carton labeling. The "Z" confirms compliance with Vishay's updated ammopack nomenclature, where orientation is set by carton positioning (+ for anode-first, – for cathode-first), and "AS" specifies standard tape configuration.
Can TLHY4400-AS12Z be used in outdoor applications?
TLHY4400-AS12Z operates from –40 °C to +100 °C and withstands soldering at 260 °C for 5 seconds, but its plastic package is not rated for UV exposure or moisture ingress. For outdoor use, it must be fully enclosed in a gasketed, UV-stabilized housing with IP-rated sealing to prevent lens yellowing or delamination.
How is luminous intensity binned for TLHY4400-AS12Z?
TLHY4400-AS12Z is categorized in luminous intensity groups per Vishay's standard classification (e.g., Group L: 1–2 mcd). Each packing unit contains LEDs from only one intensity group (IVmin/IVmax ≤ 0.5), ensuring visual uniformity in multi-LED assemblies without manual sorting.
TLHY4400-AS12Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- TLH.44
- Package/Case:
- Radial
- Packaging:
- Cut Tape (CT)
- 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 (3mm)
- Size / Dimension:
- -
TLHY4400-AS12Z FAQ
1.How can I place an order for TLHY4400-AS12Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TLHY4400-AS12Z 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-AS12Z reliable?
The price and inventory of TLHY4400-AS12Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLHY4400-AS12Z is usually 5 days.
3.What payment methods are accepted for TLHY4400-AS12Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLHY4400-AS12Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLHY4400-AS12Z?
TLHY4400-AS12Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLHY4400-AS12Z 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-AS12Z?
For technical support, including TLHY4400-AS12Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLHY4400-AS12Z requirements.
6.How does Aetrix verify that TLHY4400-AS12Z is sourced from the original manufacturer or authorized distributors?
All TLHY4400-AS12Z 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-AS12Z meets industry standards.
7.What is the process for return or replacement of TLHY4400-AS12Z?
All TLHY4400-AS12Z units undergo pre-shipment inspection (PSI). If there is an issue with TLHY4400-AS12Z, 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-AS12Z part is unused and in its original packaging.
Return procedure for TLHY4400-AS12Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLHY4400-AS12Z Tags
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