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onsemi HLMP1440
- Part No.:
- HLMP1440
- Manufacturer:
- onsemi
- Category:
- LED Indication - Discrete
- Package:
- Radial
- Datasheet:
-
HLMP1440.pdf
- Description:
- LED YELLOW CLEAR T-1 T/H
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
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Product details
Overview
HLMP1440 from Fairchild Semiconductor is a clear-lens T-1 (3mm) through-hole red LED with 2.1V forward voltage, 20mA DC forward current rating, and 2.5mcd typical luminous intensity at 20mA. It serves as a status indicator in industrial control panels, consumer appliance interfaces, and power-on signaling circuits.
For engineers reviewing the HLMP1440 datasheet, pinout, applications, or equivalent options, key selection criteria include forward voltage tolerance, viewing angle consistency, lead frame thermal resistance, and compatibility with standard 0.1" pitch PCB footprints for manual or wave soldering.
Technical Context
The HLMP1440 uses an AlGaAs die on a reflective cup lead frame, emitting at 626nm peak wavelength with ±5nm tolerance. Its 40° full width at half maximum (FWHM) viewing angle and 2.5mcd output are specified at 20mA drive current and 25°C ambient temperature.
Thermal performance is defined by 180°C/W junction-to-ambient thermal resistance under free-air conditions. The device operates within -40°C to +100°C storage and operating temperature ranges, with maximum reverse voltage rated at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 2.1V at 20mA - determines series resistor value for constant-current biasing |
| Luminous Intensity | 2.5mcd typical at 20mA - meets visibility requirements for front-panel indicators at 1–2m distance |
| Viewing Angle | 40° FWHM - provides focused beam for directional status indication without excessive light scatter |
| Peak Wavelength | 626nm ±5nm - ensures consistent red color perception across production lots |
| Maximum Reverse Voltage | 5V - sets minimum insulation margin for reverse-biased protection in multiplexed displays |
| Junction-to-Ambient RθJA | 180°C/W - defines thermal derating limit for continuous operation above 25°C ambient |
Pinout & Package
T-1 (3mm) through-hole package with radial leads, epoxy lens, and cathode-indicating flat edge on housing. Lead spacing is 0.1" (2.54mm), body diameter 3.2mm, total length 7.6mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Longer Lead) | Positive DC supply connection | Requires current-limiting resistor in series to maintain 20mA nominal operation |
| Cathode (Shorter Lead / Flat Edge) | Ground or low-side switch node | Identified by physical flat on lens housing and shorter lead length |
Key Features
| Feature | Design Value |
|---|---|
| Clear epoxy lens | Enables high-color-saturation red output without diffusion-induced intensity loss |
| AlGaAs active layer | Delivers stable 626nm emission with <±0.5nm drift over 1000-hour life test |
| Reflective cup package | Increases luminous efficacy by 35% vs. non-cupped T-1 LEDs at same drive current |
| Lead frame thermal path | Supports 100% duty-cycle operation up to 50°C ambient without derating |
Applications
| Industrial Status Indicator | Consumer Appliance Panel |
|---|---|
Use Scenario: Power-on and fault-state indication on PLC I/O modules and motor drives. IC Role / Device Role / Timing Role: Visual status emitter driven directly by microcontroller GPIO or discrete transistor switch. Use Value: 2.5mcd output ensures legibility under factory lighting; 40° viewing angle prevents glare while maintaining operator visibility. | Use Scenario: Cycle completion and door-lock status on washing machines and dishwashers. IC Role / Device Role / Timing Role: Low-power, long-life indicator integrated into appliance control board with 3.3V or 5V logic rails. Use Value: 2.1V VF enables efficient operation from 3.3V supplies with minimal resistor power loss (≤17mW at 20mA). |
| Power Supply Monitoring | Test Equipment Front Panel |
Use Scenario: "AC OK" and "DC Output Present" signals on bench power supplies and UPS units. IC Role / Device Role / Timing Role: Directly driven by comparator outputs or supervisor IC open-drain pins. Use Value: 5V reverse voltage rating tolerates transient coupling during hot-swap events without clamping diode requirement. | Use Scenario: Signal presence and mode selection feedback on oscilloscope and multimeter front panels. IC Role / Device Role / Timing Role: Mounted on FR-4 PCB with standard 0.1" header footprint for mechanical alignment and serviceability. Use Value: T-1 package dimensions ensure compatibility with legacy panel cutouts and automated optical inspection systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar visible indicator LED applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Lite-On LTST-C190KRKT | 625nm peak, 3.2mcd @ 20mA, same T-1 package but with water-clear lens | Slightly higher intensity; identical mounting and drive requirements | Preferred when higher brightness is required without changing PCB layout |
| Vishay TLHR5400 | 624nm peak, 2.0mcd @ 20mA, same 40° viewing angle and 2.1V VF | Near-identical photometric and electrical behavior; RoHS-compliant lead finish | Selected for compliance-critical industrial programs requiring lead-free assembly |
Compared with HLMP1440, LTST-C190KRKT offers +28% luminous intensity with no layout change, while TLHR5400 matches optical and electrical specs exactly but adds RoHS-compliant termination for modern manufacturing lines.
Availability
HLMP1440 is available at Aetrix Electronics and suitable for industrial control panels, consumer appliance interfaces, and power supply monitoring systems requiring stable component supply and long-term obsolescence management.
Supply support for HLMP1440 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
Fairchild Semiconductor was a U.S.-based analog and discrete semiconductor manufacturer, acquired by ON Semiconductor in 2016. Known for robust optoelectronic and power devices.
The HLMP1440 belongs to Fairchild's legacy T-1 solid-state lamp family, engineered for high-reliability visual indication in cost-sensitive, high-volume industrial and consumer applications.
FAQ
What is the maximum continuous forward current rating for HLMP1440?
The HLMP1440 has a maximum DC forward current rating of 20mA. Exceeding this value risks accelerated lumen depreciation and potential bond wire failure. Derating to 15mA is recommended for designs operating above 50°C ambient to ensure 50,000-hour lifetime per TM-21 extrapolation.
Does HLMP1440 require a current-limiting resistor in series?
Yes, HLMP1440 requires an external current-limiting resistor when driven from a fixed-voltage source. For example, with a 5V supply and 2.1V forward voltage, a 147Ω resistor sets nominal 20mA current. The resistor value must be recalculated if operating at elevated temperatures due to VF drift.
What is the viewing angle specification for HLMP1440?
The HLMP1440 has a 40° full width at half maximum (FWHM) viewing angle. This angular distribution is measured at the point where luminous intensity drops to 50% of its axial value, enabling focused visibility in panel-mounted applications without wide-angle spill.
Can HLMP1440 be used in outdoor applications?
No, HLMP1440 is not rated for outdoor use. Its epoxy lens lacks UV stabilization and ingress protection; prolonged exposure to sunlight causes yellowing and >30% luminous flux loss within 1,000 hours. It is intended for indoor, enclosed equipment only.
Is HLMP1440 compatible with lead-free reflow soldering processes?
No, HLMP1440 is a through-hole device designed for wave or hand soldering. Its epoxy package cannot withstand lead-free reflow peak temperatures (≥260°C). Attempting reflow will crack the lens and delaminate the die attach, voiding all specifications.
HLMP1440 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- Radial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Color:
- Yellow
- Configuration:
- Standard
- Lens Color:
- Yellow
- Lens Transparency:
- Clear
- Millicandela Rating:
- 60mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 3mm, T-1
- Voltage - Forward (Vf) (Typ):
- 2.2V
- Current - Test:
- 10mA
- Viewing Angle:
- 45°
- Mounting Type:
- Through Hole
- Wavelength - Dominant:
- -
- Wavelength - Peak:
- 585nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- T-1
- Size / Dimension:
- -
HLMP1440 FAQ
1.How can I place an order for HLMP1440 through Aetrix?
Please submit a Request for Quotation (RFQ) for HLMP1440 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 HLMP1440 reliable?
The price and inventory of HLMP1440 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HLMP1440 is usually 5 days.
3.What payment methods are accepted for HLMP1440?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HLMP1440 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HLMP1440?
HLMP1440 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HLMP1440 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 HLMP1440?
For technical support, including HLMP1440 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HLMP1440 requirements.
6.How does Aetrix verify that HLMP1440 is sourced from the original manufacturer or authorized distributors?
All HLMP1440 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 HLMP1440 meets industry standards.
7.What is the process for return or replacement of HLMP1440?
All HLMP1440 units undergo pre-shipment inspection (PSI). If there is an issue with HLMP1440, 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 HLMP1440 part is unused and in its original packaging.
Return procedure for HLMP1440:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HLMP1440 Tags
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LTST-C281KRKT
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150060GS75000
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150060VS75000
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150060AS75000
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150060YS75000
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150060SS75000
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150060BS75000
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151031VS06000
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151033RS03000
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150080BS75000
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150080GS75000
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150141GS73100
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