CSL0901ET1 Equivalent & Substitute Parts

Part Overview

The CSL0901ET1 is an active, surface-mount green LED indicator manufactured by Rohm Semiconductor. This discrete 0603 (1608 Metric) package component operates at a forward voltage of 2.9V and delivers 360 millicandela at 5mA test current. The component is designed for indication applications requiring a dominant wavelength of 527nm in a compact form factor with a rectangular domed-top lens.

Substitute parts are identified to address inventory availability, regional sourcing requirements, or design specifications that permit forward voltage tolerance variations within the CSL0901 series.

Substiute Parts

CSL0901ET1

Rohm SemiconductorIn Stock: 2833CSL0901ET1 Datasheet

Current PartRFQ

CSL0901ET1C

Rohm SemiconductorIn Stock: 2801CSL0901ET1C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the CSL0901 series is determined by the following allowable parameters:

Invariant Parameters (Must Match Exactly):

• Package / Case: 0603 (1608 Metric)
• Mounting Type: Surface Mount
• Color: Green
• Wavelength - Dominant: 527nm
• Millicandela Rating: 360mcd
• Current - Test: 5mA
• Lens Style: Rectangle with Domed Top
• Physical Dimensions: 1.60mm L x 0.80mm W
• Height (Max): 1.34mm
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Variable Parameters (Permitted Variance):

• Voltage - Forward (Vf) (Typ): 2.9V or 3.0V

The CSL0901ET1C variant operates at 3.0V forward voltage and includes automotive-grade qualification (AEC-Q102), making it suitable for applications where forward voltage tolerance and automotive compliance are specified design requirements.

Parameter Comparison

Engineering Selection Recommendations

CSL0901ET1 is the baseline standard-grade component suitable for general indication applications where forward voltage specification is 2.9V and automotive qualification is not required.

CSL0901ET1C is the automotive-qualified variant with 3.0V forward voltage specification and AEC-Q102 qualification. Selection of this part is appropriate for:

• Designs requiring automotive-grade compliance
• Applications where forward voltage tolerance permits 3.0V operation
• Supply chain scenarios where the standard-grade variant is unavailable

Both parts maintain identical physical dimensions, optical characteristics, and environmental compliance ratings (ROHS3, REACH Unaffected). The forward voltage difference of 0.1V must be evaluated against circuit design parameters, including current-limiting resistor values and power supply specifications.

Frequently Asked Questions (FAQ)

Q: Can CSL0901ET1C replace CSL0901ET1 in any application?

A: Substitution is valid only when the circuit design accommodates the 3.0V forward voltage specification. The 0.1V difference affects voltage drop across current-limiting resistors and overall circuit power consumption. Verify that the power supply and resistor network support 3.0V operation before substitution.

Q: What is the significance of the AEC-Q102 qualification on CSL0901ET1C?

A: AEC-Q102 is an automotive industry qualification standard for optoelectronic components. This qualification applies only to CSL0901ET1C and indicates compliance with automotive reliability and environmental testing requirements. Use CSL0901ET1C in automotive applications; use CSL0901ET1 in non-automotive applications unless automotive qualification is explicitly required.

Q: Are the physical dimensions identical between CSL0901ET1 and CSL0901ET1C?

A: Yes. Both parts share identical package dimensions (0603 / 1608 Metric), footprint (1.60mm L x 0.80mm W), and maximum height (1.34mm). PCB layout and reflow profiles are interchangeable.

Q: Do both parts have the same optical output?

A: Yes. Both parts deliver 360 millicandela at 5mA test current with a dominant wavelength of 527nm. Optical brightness and color are identical.

Q: What is the moisture sensitivity level, and does it affect storage?

A: Both parts carry MSL 3 (168 Hours) rating. This indicates the component can be exposed to ambient conditions (30°C / 85% RH) for up to 168 hours before reflow soldering without baking. Extended storage or exposure beyond this period requires component baking per IPC-A-113 specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both CSL0901ET1 and CSL0901ET1C are ROHS3 Compliant and REACH Unaffected, meeting environmental regulatory requirements for EU and global markets.

Q: What is the difference between the series designations CSL0901x and CSL0901x(C)?

A: The series designation CSL0901x(C) indicates the automotive-qualified variant within the CSL0901 product family. The "(C)" suffix denotes automotive-grade classification and AEC-Q102 qualification. Standard-grade parts use the CSL0901x designation without the suffix.