HLMP-1550 Equivalent & Substitute Parts

Part Overview

The HLMP-1550 is a green diffused T-1 through-hole LED manufactured by Broadcom Limited, designed for indication applications with a dominant wavelength of 569nm. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The original part operates at 2.1V forward voltage with a 3.1mcd brightness rating and 55° viewing angle in a 3mm T-1 package format.

Substiute Parts

HLMP-1550

Broadcom LimitedIn Stock: 873HLMP-1550 Datasheet

Current PartRFQ

5219250F

DialightIn Stock: 33015219250F Datasheet

MFR RecommendedRFQ

5219326F

DialightIn Stock: 18605219326F Datasheet

MFR RecommendedRFQ

5219327F

DialightIn Stock: 43325219327F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HLMP-1550 is determined by the following parameters: color (green), lens transparency (diffused), mounting type (through hole), package configuration (radial), wavelength compatibility (peak wavelength 565nm), and electrical operating characteristics (forward voltage and test current ranges). The substitute parts listed are Dialight 521 series green diffused LEDs that maintain compatibility across these core parameters while offering active product status and RoHS3 compliance.

The three substitute parts represent different physical package sizes and electrical ratings within the 521 series, allowing selection based on specific application requirements for brightness, voltage, and form factor.

Parameter Comparison

Engineering Selection Recommendations

All three Dialight 521 series substitutes maintain active product status and provide ROHS3 compliance, addressing the regulatory limitations of the obsolete HLMP-1550. Selection among the substitutes depends on application-specific requirements:

5219250F (T-1 3/4, 4.83mm) offers the highest brightness at 5.2mcd with a 60° viewing angle, suitable for applications requiring increased luminous intensity. This part operates at 2.3V forward voltage, closest to the original HLMP-1550 specification.

5219326F (3mm) maintains the original 3mm lens diameter and provides the lowest power consumption at 2mA test current with 1.9V forward voltage. This option is appropriate for space-constrained designs or low-power applications.

5219327F (5mm, 4.83mm) operates at the lowest forward voltage of 1.8V with 2mA test current and provides a 50° viewing angle. This part accommodates designs with larger physical envelope requirements.

All substitutes share identical peak wavelength (565nm), radial package configuration, and REACH compliance status with the original part.

Frequently Asked Questions (FAQ)

Q: Can the HLMP-1550 be directly replaced with any of these Dialight parts?

A: Direct replacement depends on circuit design parameters. All three substitutes share the same color, lens transparency, mounting type, and peak wavelength. However, differences in forward voltage (1.8V to 2.3V versus 2.1V), test current (2mA to 10mA versus 20mA), and brightness ratings require circuit verification. The 5219326F most closely matches the original 3mm lens size.

Q: What are the physical compatibility considerations?

A: The HLMP-1550 uses a 3mm T-1 package with 5.33mm maximum height. The 5219326F maintains the 3mm lens diameter with 5.86mm height, providing the closest form factor match. The 5219250F and 5219327F use larger 4.83mm diameter lenses with heights exceeding 9.5mm, requiring PCB layout verification for clearance.

Q: How do the electrical characteristics differ?

A: Forward voltage ranges from 1.8V (5219327F) to 2.3V (5219250F), compared to 2.1V for the HLMP-1550. Test current specifications vary from 2mA (5219326F, 5219327F) to 10mA (5219250F) versus 20mA for the original. Circuit current-limiting resistor values must be recalculated based on the selected substitute's forward voltage and test current.

Q: Are all substitutes RoHS compliant?

A: Yes. All three Dialight 521 series substitutes are ROHS3 compliant, whereas the original HLMP-1550 is RoHS non-compliant. This addresses regulatory requirements for new designs and production.

Q: Which substitute provides the closest brightness match?

A: The 5219250F offers 5.2mcd, exceeding the original 3.1mcd rating. The 5219327F (1.8mcd) and 5219326F (1.6mcd) provide lower brightness levels. Application requirements for luminous intensity must determine the appropriate selection.