Dialight 5511209 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5511209 is a 3mm yellow LED circuit board indicator designed for through-hole, right-angle mounting applications. This component operates at 1.8V with a 2mA current rating and delivers 1.6mcd brightness with a 60° viewing angle. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives within the Dialight 551 series provide direct functional equivalence while maintaining current product support and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer	Dialight
Series	551
Color	Yellow
Wavelength - Peak	585nm
Configuration	Single
Current Rating	2mA
Millicandela Rating	1.6mcd
Viewing Angle	60°
Lens Type	Diffused, Tinted
Voltage Rating	1.8V
Mounting Type	Through Hole, Right Angle
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS Code	8541.41.0000

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5511209 is determined by strict equivalence across the following critical parameters:

Color: Yellow (585nm peak wavelength)
Current Rating: 2mA
Voltage Rating: 1.8V
Millicandela Rating: 1.6mcd
Viewing Angle: 60°
Lens Type: Diffused, Tinted
Mounting Type: Through Hole, Right Angle
Configuration: Single
Series: Dialight 551

All substitute parts listed maintain identical electrical and optical specifications. The primary distinction between the main part (5511209) and active substitutes is product status: the 5511209 is obsolete, while all listed alternatives are active products with current manufacturing support and RoHS3 compliance certification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Color	Current (mA)	Voltage (V)	Brightness (mcd)	Viewing Angle	Mounting	RoHS Status	Inventory (Pcs)
5511209	Dialight	Obsolete	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	Not Specified	1031
5511201010F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	973
5511201F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	1005
5511203F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	805
5511207003F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	1029
5511207010F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	976
5511207F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	1529
5511209F	Dialight	Active	Yellow	2	1.8	1.6	60°	Through Hole, Right Angle	RoHS3 Compliant	3335

Engineering Selection Recommendations

All listed substitute parts are electrically and optically equivalent to the Dialight 5511209. Selection among active alternatives should be based on the following factors:

Product Status: All substitute parts carry active product status with ongoing manufacturing support, contrasting with the obsolete 5511209. This ensures long-term availability and supply chain continuity.

Compliance Certification: All substitute parts are RoHS3 compliant, meeting current environmental and regulatory requirements. The original 5511209 does not specify RoHS status.

Inventory Availability: The 5511209F variant offers the highest current inventory level at 3335 pieces, followed by 5511207F at 1529 pieces. Both provide substantial stock for immediate deployment.

Packaging: All substitutes are supplied in bulk packaging, consistent with production and assembly workflows.

For new designs or production transitions, any of the listed active parts provide direct functional replacement. For existing applications currently using 5511209, direct substitution with any listed alternative maintains circuit performance without modification.

Frequently Asked Questions (FAQ)

Q: Can the Dialight 5511209 be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts maintain identical electrical specifications (1.8V, 2mA), optical output (1.6mcd, 60° viewing angle), and mechanical form factor (3mm, through-hole, right-angle mounting). Direct substitution is possible without circuit redesign.

Q: What is the primary reason for substitution?

A: The 5511209 is classified as obsolete. Active alternatives within the Dialight 551 series provide equivalent functionality with current manufacturing support and RoHS3 compliance certification.

Q: Are there differences in lens characteristics between the main part and substitutes?

A: The 5511209 specifies "Round with Domed Top" lens style. Some substitute part records do not include lens style designation in the provided data. Confirm lens geometry with Dialight technical documentation if specific optical housing requirements exist.

Q: Which substitute part should be selected for new production?

A: The 5511209F is recommended for new production due to highest inventory availability (3335 pieces) and active product status. The 5511207F provides an alternative with substantial stock (1529 pieces).

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. The original 5511209 does not specify RoHS status.

Q: Can these parts be used interchangeably in existing circuit boards?

A: Yes, provided the circuit board layout accommodates through-hole, right-angle mounting. All parts share identical electrical and optical parameters, enabling direct substitution without circuit modification.

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