LTM1405GC LED Circuit Board Indicator Equivalent & Substitute Parts

Part Overview

The LTM1405GC is a single green LED circuit board indicator manufactured by Bivar Inc., classified as a T-1 3/4 (5mm) through-hole component. This part features a clear lens with domed top, rated for 2.1V at 30mA operation, and delivers 40 millicandela brightness at a 35° viewing angle with a peak wavelength of 568nm.

The LTM1405GC is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or repair requirements for systems utilizing this LED indicator.

Substiute Parts

LTM1405GC

Bivar Inc.In Stock: 855LTM1405GC Datasheet

Current PartRFQ

LTM1405GD

Bivar Inc.In Stock: 1001LTM1405GD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTM1405GC is determined by the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: Bivar Inc.
• Series: LTM
• Color: Green
• Wavelength - Peak: 568nm
• Configuration: Single
• Voltage Rating: 2.1V
• Current Rating: 30mA
• Lens Size: 5mm, T-1 3/4
• Lens Style: Round with Domed Top
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Millicandela Rating: Variation permitted within operational tolerance
• Viewing Angle: Variation permitted within operational tolerance
• Lens Type: Clear or Diffused acceptable based on application requirements
• Product Status: Active status preferred for substitute parts

The LTM1405GD qualifies as a substitute part based on matching all mandatory parameters while permitting acceptable variations in brightness and viewing angle characteristics.

Parameter Comparison

Engineering Selection Recommendations

LTM1405GD as Primary Substitute:

The LTM1405GD is the designated substitute for the obsolete LTM1405GC. Both components share identical electrical specifications (2.1V, 30mA) and physical form factor (5mm T-1 3/4 through-hole). The LTM1405GD maintains active product status with Bivar Inc., ensuring ongoing availability and supply chain continuity.

Compliance Considerations:

The LTM1405GD carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution. This compliance status supports integration into modern production environments and systems subject to regulatory oversight.

Optical Characteristic Differences:

The LTM1405GD exhibits a 25mcd brightness rating compared to the LTM1405GC's 40mcd, representing a 37.5% reduction in peak luminous intensity. The viewing angle increases from 35° to 40°, providing a wider light distribution pattern. The lens type transitions from clear to diffused, affecting light transmission and beam characteristics. These optical variations must be evaluated against specific application requirements for indicator visibility and light distribution.

Frequently Asked Questions (FAQ)

Q: Can the LTM1405GD directly replace the LTM1405GC in existing circuit board designs?

A: The LTM1405GD is mechanically and electrically compatible with the LTM1405GC. Both components feature identical through-hole mounting configurations, voltage ratings (2.1V), and current ratings (30mA). No circuit modifications are required for physical substitution. However, optical performance differences must be evaluated for the specific application.

Q: What are the key differences between the LTM1405GC and LTM1405GD?

A: The primary differences are: (1) Lens Type—LTM1405GC features a clear lens while LTM1405GD uses a diffused lens; (2) Brightness—LTM1405GC delivers 40mcd versus 25mcd for LTM1405GD; (3) Viewing Angle—LTM1405GC provides 35° while LTM1405GD offers 40°; (4) Product Status—LTM1405GC is obsolete while LTM1405GD is active.

Q: Why does the LTM1405GD have lower brightness than the LTM1405GC?

A: The diffused lens type in the LTM1405GD distributes light over a wider area compared to the clear lens in the LTM1405GC. This design characteristic results in lower peak luminous intensity (25mcd) but provides broader light distribution across a 40° viewing angle.

Q: Is the LTM1405GD suitable for applications requiring high brightness indicators?

A: The LTM1405GD's 25mcd brightness rating is lower than the LTM1405GC's 40mcd. Applications with strict brightness requirements should evaluate whether the reduced intensity meets visibility specifications. The wider 40° viewing angle may compensate for reduced peak brightness in certain applications.

Q: What is the significance of ROHS3 compliance on the LTM1405GD?

A: ROHS3 compliance indicates the LTM1405GD meets current environmental and regulatory standards for hazardous substance restrictions in electronic components. This certification supports compliance with modern manufacturing and distribution requirements and regulatory frameworks applicable to electronic equipment.

Q: Are there any packaging differences between these parts?

A: The LTM1405GC packaging is specified as "-" (not detailed), while the LTM1405GD is supplied in Tray packaging. Both components utilize through-hole mounting technology compatible with standard PCB assembly processes.

Q: Can the LTM1405GD be used in designs originally specified for the LTM1405GC?

A: The LTM1405GD is electrically and mechanically compatible with the LTM1405GC. Design compatibility depends on whether the application can accommodate the optical differences: lower brightness (25mcd vs. 40mcd), wider viewing angle (40° vs. 35°), and diffused lens characteristics versus clear lens.