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Vishay Semiconductor Opto Division TLHR4900
- Part No.:
- TLHR4900
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
TLHR4900.pdf
- Description:
- LED RED CLEAR T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:1,111
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Product details
Overview
TLHR4900 from Vishay Semiconductors is a high-efficiency red LED in a standard Ø3 mm clear plastic (T-1) package, delivering 6.3–25 mcd luminous intensity at 10 mA, with dominant wavelength 612–625 nm and ±16° viewing angle-designed for status indication and legend lighting where directional brightness and color uniformity are critical.
For engineers reviewing the TLHR4900 datasheet, TLHR4900 pinout, TLHR4900 application, or TLHR4900 equivalent, this page provides verified optical/electrical specs, package dimensions, binning categories, absolute maximum ratings, and real-world use context for industrial indicator and panel-mount lighting design.
Technical Context
The TLHR4900 is a GaAsP-on-GaP heterostructure LED optimized for high brightness within a narrow viewing cone. Its ±16° half-intensity angle and tight luminous intensity binning (Q–V groups) enable consistent visual appearance across multiple units in panel arrays.
It operates at DC or pulsed forward currents up to 30 mA continuous (Tamb ≤ 60 °C), with 2–3 V forward voltage at 20 mA and 6 V reverse voltage rating. Junction capacitance is 50 pF at 0 V, supporting moderate-speed switching in indicator circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 6.3–25 mcd at 10 mA - defines visible output level for status visibility under ambient light |
| Dominant wavelength | 612–625 nm - ensures consistent red hue across production batches |
| Viewing angle | ±16° half-intensity - delivers focused beam for directional indicators without diffusion lenses |
| Forward voltage | 2–3 V at 20 mA - compatible with standard 3.3 V/5 V logic-level current-limiting resistor drive |
| Absolute max forward current | 30 mA continuous - sets upper limit for thermal design and resistor sizing |
| Junction-to-ambient thermal resistance | 400 K/W - informs derating curves above 60 °C ambient |
| Reverse voltage rating | 6 V - defines minimum protection needed against polarity reversal or transient spikes |
Pinout & Package
TLHR4900 uses a standard 2-pin axial leaded Ø3 mm (T-1) clear plastic package with cathode-indicating flat edge and shorter lead. Package outline conforms to drawing 6.544-5255.02-4: body diameter 2.9 ± 0.1 mm, length 6.1 ± 0.3 mm, lead spacing 2.54 mm nominal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (longer lead) | Positive terminal | Connects to current source or MCU GPIO via series resistor; polarity must be observed to avoid damage |
| Cathode (shorter lead, flat side) | Negative terminal | Reference node for current return; marking aligns with PCB silkscreen cathode indicator |
Key Features
| Feature | Design Value |
|---|---|
| Luminous intensity binning (Q–V groups) | Enables assembly of visually matched LEDs on same panel without manual sorting |
| ±16° viewing angle | Reduces need for external collimating optics in front-panel indicators |
| GaAsP-on-GaP chip technology | Delivers stable red emission with low forward voltage drift over temperature |
| DC and pulsed operation support | Allows use in both steady-state status lights and PWM-dimmed readout applications |
| Clear epoxy lens | Maximizes light extraction efficiency and preserves spectral purity vs. diffused variants |
Applications
| Status Indicator | Legend Illumination |
|---|---|
Use Scenario: Front-panel power-on or fault-status indication on industrial control cabinets. IC Role / Device Role / Timing Role: Visual output device emitting calibrated red light to signal system state. Use Value: High-directional intensity (±16°) ensures visibility from operator position without glare or bleed into adjacent indicators. |
Use Scenario: Backlighting engraved labels on membrane keypads or metal nameplates. IC Role / Device Role / Timing Role: Localized light source aligned beneath translucent legend areas. Use Value: Tight viewing angle confines illumination precisely to marked characters, preventing halo or washout. |
| Readout Display | Maintenance Light |
Use Scenario: Digit or symbol backlighting in compact digital panel meters. IC Role / Device Role / Timing Role: Discrete point-source emitter paired with light-guide or diffuser film. Use Value: Luminous intensity binning (Q–V) guarantees uniform brightness across multi-digit displays. |
Use Scenario: Handheld diagnostic tool with localized task lighting for equipment inspection. IC Role / Device Role / Timing Role: Low-power, eye-safe auxiliary illumination source. Use Value: 30 mA absolute max rating supports battery-efficient operation with minimal thermal load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar red LED indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay TLHR4901 | Same package and chip technology; luminous intensity binned to R group (10–20 mcd) instead of Q (6.3–12.5 mcd) | Suitable where higher minimum brightness is required without changing layout or drive circuit | Select TLHR4901 when tighter lower-bound intensity is needed for low-ambient-light environments |
| ROHM SML-310PTT86 | Ø3 mm package, red, 15–35 mcd at 20 mA, 620–635 nm dominant wavelength, ±15° viewing angle | Higher typical intensity but wider wavelength tolerance; not binned for luminous intensity uniformity | Choose SML-310PTT86 only if binning consistency is not required and higher peak output is prioritized |
Compared with TLHR4900, TLHR4901 offers higher guaranteed minimum intensity in the same footprint and drive conditions, while SML-310PTT86 trades binning precision for higher nominal output-making TLHR4900 optimal for applications demanding visual uniformity across multiple units.
Availability
TLHR4900 is available at Aetrix Electronics and suitable for status indicators, legend illumination, and readout displays requiring stable component supply, consistent color matching, and long-term industrial-grade reliability.
Supply support for TLHR4900 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, specializing in high-reliability optoelectronics, power management, and sensing solutions.
The TLHR4900 belongs to Vishay's TLH.4900 series of high-brightness indicator LEDs, engineered specifically for applications demanding precise luminous intensity and wavelength consistency in compact through-hole packaging.
FAQ
What is the forward voltage range of TLHR4900 at its rated operating current?
The TLHR4900 has a forward voltage range of 2.0–3.0 V at 20 mA DC forward current. This range reflects process variation across production lots and allows proper selection of current-limiting resistors for 3.3 V or 5 V supply rails. The TLHR4900 maintains stable VF characteristics over its –40 °C to +100 °C operating temperature range.
Does TLHR4900 require current-limiting protection, and what is its maximum safe continuous current?
Yes, TLHR4900 requires a series current-limiting resistor or constant-current driver. Its absolute maximum DC forward current is 30 mA at ambient temperatures ≤60 °C. Exceeding this value risks accelerated degradation or thermal runaway. Derating is required above 60 °C per the datasheet's IF vs. Tamb curve.
How is luminous intensity binned for TLHR4900, and why does it matter in production?
TLHR4900 is categorized into luminous intensity groups Q–V (e.g., Q = 6.3–12.5 mcd). Each reel or bulk shipment contains only one intensity group-no mixing. This ensures visual uniformity across all TLHR4900 units used in a single assembly, eliminating post-production sorting and reducing field-visible mismatches in multi-LED panels.
What is the viewing angle specification of TLHR4900, and how does it affect optical design?
The TLHR4900 has an angle of half intensity of ±16°, meaning luminous intensity drops to 50% at 16° off-axis. This narrow beam enables precise targeting of light onto indicators or legends without spill, reducing the need for secondary optics and simplifying mechanical alignment in front-panel designs.
Is TLHR4900 suitable for pulsed operation, and what are its surge current limits?
Yes, TLHR4900 supports pulsed operation with a surge forward current rating of 1 A for pulse widths ≤10 μs. This allows brief high-intensity flashes for attention-grabbing alerts. Pulse duty cycle and repetition rate must stay within the IF vs. tp/T derating curves shown in Figure 2 of the datasheet to avoid junction overheating.
TLHR4900 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- TLH.4900
- Package/Case:
- Radial
- Packaging:
- Bulk
- Product Status:
- Active
- Color:
- Red
- Configuration:
- Standard
- Lens Color:
- -
- Lens Transparency:
- Clear
- Millicandela Rating:
- 25mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 2V
- Current - Test:
- 10mA
- Viewing Angle:
- 32°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- 619nm
- Wavelength - Peak:
- 635nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1
- Size / Dimension:
- -
TLHR4900 FAQ
1.How can I place an order for TLHR4900 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLHR4900 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 TLHR4900 reliable?
The price and inventory of TLHR4900 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLHR4900 is usually 5 days.
3.What payment methods are accepted for TLHR4900?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLHR4900 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLHR4900?
TLHR4900 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLHR4900 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 TLHR4900?
For technical support, including TLHR4900 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLHR4900 requirements.
6.How does Aetrix verify that TLHR4900 is sourced from the original manufacturer or authorized distributors?
All TLHR4900 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 TLHR4900 meets industry standards.
7.What is the process for return or replacement of TLHR4900?
All TLHR4900 units undergo pre-shipment inspection (PSI). If there is an issue with TLHR4900, 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 TLHR4900 part is unused and in its original packaging.
Return procedure for TLHR4900:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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