CSL0901WT1C Yellow LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The CSL0901WT1C is an automotive-grade yellow LED indicator in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This discrete LED operates at 2.1V forward voltage with a dominant wavelength of 587nm and delivers 280 millicandela at 20mA test current. The component is actively produced, AEC-Q102 qualified, and ROHS3 compliant, making it suitable for automotive applications requiring reliable yellow indication functionality. Equivalent substitute parts are identified based on matching electrical characteristics, mechanical dimensions, and automotive qualification standards.

Substiute Parts

CSL0901WT1C

Rohm SemiconductorIn Stock: 2397CSL0901WT1C Datasheet

Current PartRFQ

CSL0901YT1C

Rohm SemiconductorIn Stock: 1407CSL0901YT1C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CSL0901WT1C are identified based on strict equivalence of the following critical parameters:

Electrical Equivalence Criteria:

• Forward voltage (Vf): 2.1V typical
• Test current: 20mA
• Color: Yellow
• Wavelength range: 587nm to 590nm dominant wavelength

Mechanical Equivalence Criteria:

• Package type: 0603 (1608 Metric)
• Physical dimensions: 1.60mm L x 0.80mm W
• Maximum height: 1.34mm
• Lens style: Rectangle with Domed Top
• Mounting type: Surface Mount

Compliance Equivalence Criteria:

• Automotive grade classification
• AEC-Q102 qualification
• ROHS3 compliance
• MSL 3 rating

The CSL0901YT1C qualifies as a parametric equivalent substitute based on matching all electrical, mechanical, and compliance parameters within the specified tolerances. The primary difference is packaging format (Tape & Reel versus Cut Tape) and a minor increase in luminous intensity (320mcd versus 280mcd), with wavelength variation within the yellow LED specification range (590nm versus 587nm).

Parameter Comparison

Engineering Selection Recommendations

The CSL0901YT1C serves as a direct parametric equivalent to the CSL0901WT1C for applications requiring yellow LED indication in automotive environments. Both components share identical electrical specifications (2.1V forward voltage, 20mA test current), mechanical form factor (0603 package, 1.60mm x 0.80mm x 1.34mm maximum height), and automotive compliance credentials (AEC-Q102 qualification, ROHS3 compliance, MSL 3 rating).

Selection between these parts is determined by packaging requirements and supply chain considerations. The CSL0901WT1C is supplied in Cut Tape format with Digi-Reel packaging, while the CSL0901YT1C is supplied in standard Tape & Reel format. The CSL0901YT1C provides increased luminous intensity (320mcd versus 280mcd) and operates at a slightly longer dominant wavelength (590nm versus 587nm), both within acceptable yellow LED specification ranges.

Both parts maintain active product status and are manufactured by Rohm Semiconductor under identical automotive qualification standards. Component selection should be based on packaging format compatibility with assembly equipment and procurement volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the CSL0901YT1C replace the CSL0901WT1C in existing designs?

A: Yes. The CSL0901YT1C is electrically and mechanically equivalent to the CSL0901WT1C. Both components operate at 2.1V forward voltage, 20mA test current, and are housed in identical 0603 (1608 Metric) packages with matching physical dimensions and lens geometry. Both hold AEC-Q102 automotive qualification and ROHS3 compliance.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging supplies components on individual tape segments suitable for manual handling or small-volume assembly. Tape & Reel (TR) packaging supplies components on continuous reels optimized for automated pick-and-place assembly equipment. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Are there wavelength differences between these parts?

A: The CSL0901WT1C operates at 587nm dominant wavelength, while the CSL0901YT1C operates at 590nm dominant wavelength. Both wavelengths fall within the yellow LED specification range and produce visually equivalent yellow indication. The 3nm difference is not perceptible in typical indicator applications.

Q: Does the higher millicandela rating of the CSL0901YT1C affect circuit design?

A: No. Both parts operate at identical forward voltage (2.1V) and test current (20mA). The CSL0901YT1C delivers 320mcd compared to 280mcd for the CSL0901WT1C at the same operating conditions. This increased luminous intensity does not require circuit modifications and represents improved brightness performance.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the CSL0901WT1C and CSL0901YT1C are classified as automotive-grade components and hold AEC-Q102 qualification, confirming suitability for automotive indicator applications. Both maintain ROHS3 compliance and MSL 3 moisture sensitivity rating.

Q: What inventory considerations apply to these substitute parts?

A: The CSL0901WT1C maintains 2381 pieces in stock, while the CSL0901YT1C maintains 1335 pieces in stock. Availability may influence component selection for high-volume production requirements.