SMLK18WBJCW LED Equivalent & Substitute Parts

Part Overview

The SMLK18WBJCW is a cool white LED (8000K) manufactured by Rohm Semiconductor in the SML series. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates at 3.9V forward voltage with a typical test current of 90mA and delivers 21 lumens at 25°C, providing 60 lm/W efficiency. Surface mount packaging in 2-SMD, Flat Lead configuration (1808/4520) enables integration into compact lighting applications.

Substiute Parts

SMLK18WBJCW

Rohm SemiconductorIn Stock: 816SMLK18WBJCW Datasheet

Current PartRFQ

SMLK18WBNCW1

Rohm SemiconductorIn Stock: 3066SMLK18WBNCW1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMLK18WBJCW is determined by the following critical parameters:

• Forward voltage (Vf): 3.9V typical
• Test current: 90mA
• Package configuration: 4520 (1808) footprint
• Mounting type: Surface Mount
• Base product number: SMLK18
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The substitute part SMLK18WBNCW1 shares the same base product number (SMLK18), identical forward voltage (3.9V), matching test current (90mA), and compatible package dimensions (4.00mm L x 2.00mm W, 0.70mm height). Both parts maintain ROHS3 and REACH compliance with identical MSL ratings. The primary distinction is packaging format: the main part uses 2-SMD Flat Lead configuration while the substitute uses 4-SMD No Lead configuration, both compatible with 4520 footprint requirements.

Parameter Comparison

Engineering Selection Recommendations

The SMLK18WBNCW1 is the designated substitute for the obsolete SMLK18WBJCW. Both parts maintain identical electrical specifications (3.9V Vf, 90mA test current) and physical dimensions (4.00mm x 2.00mm x 0.70mm), ensuring PCB footprint compatibility. The substitute part carries Active product status, providing long-term availability and supply chain stability. Both components satisfy ROHS3 and REACH compliance requirements with matching MSL ratings, supporting equivalent environmental and regulatory qualification pathways. The transition from 2-SMD Flat Lead to 4-SMD No Lead packaging represents a standard industry evolution within the 4520 footprint family, maintaining mechanical and electrical interchangeability for surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SMLK18WBNCW1 directly replace SMLK18WBJCW on existing PCBs?

A: Yes. Both parts share identical footprint dimensions (4.00mm L x 2.00mm W, 0.70mm height) and are compatible with 4520 pad layouts. The packaging configuration change from 2-SMD Flat Lead to 4-SMD No Lead does not affect PCB placement or reflow soldering processes.

Q: What is the primary reason for substitution?

A: The SMLK18WBJCW is classified as obsolete. The SMLK18WBNCW1 maintains active production status, ensuring continued component availability and supply chain reliability.

Q: Are the electrical characteristics identical?

A: Yes. Both parts operate at 3.9V forward voltage with 90mA test current, delivering equivalent performance in lighting applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SMLK18WBJCW and SMLK18WBNCW1 are ROHS3 Compliant and REACH Unaffected with identical MSL ratings of 3 (168 Hours).

Q: What is the difference between the two packaging configurations?

A: SMLK18WBJCW uses 2-SMD Flat Lead configuration while SMLK18WBNCW1 uses 4-SMD No Lead configuration. Both are compatible with the 4520 (1808) footprint standard.

Q: Is there a difference in color temperature?

A: The main part specifies White, Cool (8000K). The substitute part specifies White without explicit CCT designation in the provided data. Electrical and physical compatibility is maintained for standard white LED applications.