LED Orange Clear T-1 T/H 3UOC Equivalent & Substitute Parts

Part Overview

The Bivar Inc. 3UOC is an orange LED indication component featuring a clear lens with 300mcd brightness rating, designed for through-hole mounting applications. This discrete 1.8V radial LED operates at 20mA test current with a 30° viewing angle and 625nm peak wavelength. The product is classified as obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility for existing designs or new implementations requiring similar optical and electrical characteristics.

Substiute Parts

3UOC

Bivar Inc.In Stock: 7093UOC Datasheet

Current PartRFQ

151031YS06000

Würth ElektronikIn Stock: 2948151031YS06000 Datasheet

SimilarRFQ

LTL-4256N

Lite-On Inc.In Stock: 924LTL-4256N Datasheet

SimilarRFQ

LTL1CHKSKNN

Lite-On Inc.In Stock: 1610LTL1CHKSKNN Datasheet

SimilarRFQ

SLR-342DC3F

Rohm SemiconductorIn Stock: 2978SLR-342DC3F Datasheet

SimilarRFQ

SLR-343YC3F

Rohm SemiconductorIn Stock: 1644SLR-343YC3F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3UOC are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Mounting Type: Through Hole (radial configuration)
• Lens Size: 3mm T-1 form factor
• Package / Case: Radial
• Moisture Sensitivity Level: 1 (Unlimited)
• Color: Orange (primary) or functionally equivalent wavelength range
• Lens Transparency: Clear (preferred for optical consistency)

Secondary Compatibility Parameters:

• Voltage - Forward (Vf): Range 1.8V to 2.1V acceptable for most circuit designs
• Current - Test: 10mA to 20mA operational range
• Millicandela Rating: 25mcd to 320mcd brightness range
• Viewing Angle: 30° to 60° acceptable for indication applications
• Wavelength - Peak: 605nm to 625nm for orange spectrum; 585nm to 592nm for yellow spectrum

The substitute parts listed include both orange-spectrum components (SLR-342DC3F) and yellow-spectrum alternatives (151031YS06000, LTL-4256N, LTL1CHKSKNN, SLR-343YC3F). Yellow LEDs are included as functional substitutes where color differentiation is not critical to circuit operation, as they share identical mechanical form factors and electrical operating ranges.

Parameter Comparison

Engineering Selection Recommendations

For Direct Orange-Spectrum Replacement:

The SLR-342DC3F (Rohm Semiconductor) is the only orange-spectrum substitute available. This component maintains color consistency with the 3UOC but operates at 2V forward voltage (0.2V higher) and 10mA test current (half the original). The 25mcd brightness rating is significantly lower than the 300mcd original specification. This component is classified as "Not For New Designs," indicating limited long-term availability. Height is 5.40mm compared to the original 4.50mm, requiring PCB layout verification for clearance-sensitive applications.

For Active Product Status (Recommended for New Designs):

The LTL1CHKSKNN (Lite-On Inc.) and 151031YS06000 (Würth Elektronik) are both active products with current manufacturing status. The LTL1CHKSKNN provides the closest brightness match at 320mcd (compared to 300mcd original) and operates at 2.05V forward voltage with 20mA test current, matching the original current specification. The 151031YS06000 offers 110mcd brightness with diffused lens transparency, providing wider 60° viewing angle compared to the original 30°.

Compliance Considerations:

All substitute components listed are ROHS3 compliant. The LTL-4256N and LTL1CHKSKNN are REACH compliant or unaffected. The 151031YS06000 and SLR-342DC3F are REACH unaffected. All components maintain MSL 1 (Unlimited) moisture sensitivity rating, consistent with the original specification.

Height Constraint Analysis:

The original 3UOC has a maximum height of 4.50mm. All substitute components exceed this dimension, ranging from 5.20mm to 5.85mm. Applications with strict height limitations require mechanical verification before substitution.

Frequently Asked Questions (FAQ)

Q: Can the 3UOC be directly replaced with a yellow LED substitute?

A: Yes, if the application does not require orange color specification. All yellow-spectrum substitutes (151031YS06000, LTL-4256N, LTL1CHKSKNN, SLR-343YC3F) share identical through-hole radial mounting, T-1 form factor, and MSL 1 rating. Functional compatibility depends on circuit design requirements for color-specific indication. Verify that the application schematic does not mandate orange wavelength specification.

Q: What is the brightness difference between the 3UOC and available substitutes?

A: The original 3UOC operates at 300mcd. The LTL1CHKSKNN provides the closest match at 320mcd. The 151031YS06000 offers 110mcd (37% of original). The SLR-342DC3F provides only 25mcd (8% of original). The LTL-4256N and SLR-343YC3F provide 40mcd and 16mcd respectively. Circuit designs relying on specific brightness levels require resistor value recalculation based on the selected substitute's millicandela rating and forward voltage.

Q: Are there height restrictions when substituting the 3UOC?

A: Yes. The original component is 4.50mm maximum height. All substitutes are taller: LTL1CHKSKNN (5.20mm), SLR-342DC3F (5.40mm), SLR-343YC3F (5.60mm), 151031YS06000 (5.55mm), and LTL-4256N (5.85mm). Applications with PCB-to-enclosure clearance constraints below 5.20mm cannot accommodate any listed substitute without mechanical redesign.

Q: Which substitute is recommended for new product designs?

A: The LTL1CHKSKNN (Lite-On Inc.) is recommended for new designs. It maintains active product status, provides the closest brightness match (320mcd vs. 300mcd original), operates at identical 20mA test current, and is ROHS3 compliant. The 151031YS06000 (Würth Elektronik) is an alternative active product option with broader viewing angle (60° vs. 30° original) if wider light distribution is acceptable.

Q: What forward voltage adjustment is required when substituting?

A: The original 3UOC operates at 1.8V forward voltage. Substitutes range from 2.0V to 2.1V. This 0.2V to 0.3V increase requires series resistor recalculation to maintain proper LED current. For a 5V supply circuit, the resistor value increases approximately 10-15% depending on the substitute selected. Verify the circuit's current-limiting resistor design accommodates the higher forward voltage before substitution.

Q: Can the SLR-342DC3F be used as an orange-spectrum replacement?

A: The SLR-342DC3F is the only orange-spectrum substitute available (605nm peak wavelength vs. 625nm original). However, it is classified as "Not For New Designs," indicating limited future availability. The 25mcd brightness is significantly lower than the 300mcd original, requiring circuit verification. This component is suitable only for legacy design maintenance where orange color is mandatory and new product designs are not planned.

Q: What is the difference between clear and diffused lens transparency?

A: The original 3UOC has a clear lens, providing focused light output with sharp intensity distribution. The 151031YS06000 features a diffused lens, scattering light over a wider area with reduced peak intensity. Clear-lens substitutes (SLR-342DC3F, LTL-4256N, LTL1CHKSKNN, SLR-343YC3F) maintain the original optical characteristics. Diffused-lens alternatives provide wider viewing angles but lower brightness concentration, suitable for applications requiring distributed illumination rather than focused indication.

Q: Are all substitutes compatible with existing PCB layouts?

A: All substitutes use identical through-hole radial mounting and T-1 form factor, ensuring mechanical compatibility with existing PCB footprints. However, the increased height of all substitutes (5.20mm to 5.85mm vs. 4.50mm original) may affect clearance in space-constrained designs. Verify PCB-to-enclosure spacing and component-to-component clearance before substitution. No footprint redesign is required, but mechanical clearance verification is mandatory.