LED YELLOW CLEAR 3MM T/H - 3YT-201-S Equivalent & Substitute Parts

Part Overview

The 3YT-201-S is a yellow LED indication component manufactured by Bivar Inc., designed for through-hole mounting applications. This discrete 2V radial LED features a 3mm T-1 form factor with clear lens transparency and 40mcd brightness rating. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where equivalent performance is required.

Substiute Parts

3YT-201-S

Bivar Inc.In Stock: 11693YT-201-S Datasheet

Current PartRFQ

WP710A10YT

KingbrightIn Stock: 1310WP710A10YT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the 3YT-201-S is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Yellow
• Lens Transparency: Clear
• Lens Size: 3mm, T-1 form factor
• Mounting Type: Through Hole (Radial configuration)
• Voltage - Forward (Vf): 2V nominal range (tolerance: ±0.1V acceptable)
• Current - Test: 20mA standard test condition
• Wavelength - Peak: 590nm yellow spectrum
• Lens Style: Round with Domed Top
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Millicandela Rating: 30mcd to 40mcd range
• Viewing Angle: 20° to 34° range
• Height (Max): 5.10mm to 5.90mm range

The WP710A10YT from Kingbright meets all primary compatibility criteria and falls within acceptable ranges for secondary parameters, qualifying it as a direct substitute for the obsolete 3YT-201-S.

Parameter Comparison

Engineering Selection Recommendations

The WP710A10YT from Kingbright is qualified as a direct substitute for the obsolete 3YT-201-S based on the following engineering criteria:

Compliance and Certification:

• Both components share identical ECCN classification (EAR99) and HTSUS code (8541.41.0000)
• WP710A10YT carries RoHS3 compliance and REACH Unaffected status, meeting current regulatory requirements
• Moisture Sensitivity Level 1 (Unlimited) on both components ensures equivalent environmental handling

Electrical Compatibility:

• Forward voltage differential of 0.1V (2V vs. 2.1V) is within standard circuit design tolerance for LED indication applications
• Test current specification of 20mA is identical, ensuring equivalent brightness performance under standard operating conditions
• Peak wavelength of 590nm matches exactly, maintaining color consistency in indication applications

Mechanical and Optical Compatibility:

• Identical 3mm T-1 form factor and radial through-hole mounting configuration ensure direct PCB compatibility
• Round domed lens style and clear transparency are identical
• Height variation of 0.80mm (5.10mm to 5.90mm) is acceptable for through-hole applications with standard PCB clearances
• Wider viewing angle of 34° on the substitute provides equal or improved visibility compared to the original 20° specification

Product Status:

• WP710A10YT is active in production with 1286 pieces in stock, ensuring long-term availability
• Original 3YT-201-S is obsolete with limited remaining inventory (1102 pieces)

Frequently Asked Questions (FAQ)

Q: Can the WP710A10YT directly replace the 3YT-201-S in existing PCB designs?

A: Yes. Both components share identical lens size (3mm T-1), radial through-hole mounting configuration, and mechanical envelope within acceptable tolerance. No PCB layout modifications are required.

Q: What is the significance of the 0.1V forward voltage difference between the two parts?

A: The forward voltage difference of 0.1V (2V vs. 2.1V) is within standard design tolerance for LED indication circuits. This variation is typical across LED component families and does not affect circuit functionality when proper current-limiting resistors are used.

Q: Why does the WP710A10YT have a lower millicandela rating (30mcd vs. 40mcd)?

A: The 30mcd rating on the WP710A10YT remains within the acceptable brightness range for yellow LED indication applications. The wider viewing angle of 34° (compared to 20°) provides improved visibility across a broader angular range, partially compensating for the lower peak intensity specification.

Q: Are there any compliance or regulatory differences between these components?

A: Both components share identical ECCN and HTSUS classifications. The WP710A10YT carries active RoHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. The obsolete 3YT-201-S does not carry these current certifications.

Q: What is the maximum height difference, and does it affect through-hole mounting?

A: The maximum height difference is 0.80mm (5.10mm vs. 5.90mm). This variation is acceptable for through-hole applications and does not affect standard PCB clearances or component seating.

Q: Is the WP710A10YT available in the same packaging as the 3YT-201-S?

A: The WP710A10YT is supplied in bulk packaging, while the original 3YT-201-S packaging specification is listed as "-". Both components use identical radial package configuration suitable for through-hole assembly.

Q: Can the WP710A10YT be used in new designs, or only as a replacement for obsolete stock?

A: The WP710A10YT is an active product suitable for both new designs and obsolescence replacement. Its active production status and current regulatory compliance make it appropriate for ongoing system development and long-term supply chain planning.