3HTL-S

Part Overview

The 3HTL-S is a red LED indicator with a 3mm T-1 through-hole package manufactured by Bivar Inc. This discrete LED component operates at 1.8V forward voltage and is designed for red indication applications. The product status is obsolete, making identification of suitable substitute components essential for design continuity and procurement planning. Substitute parts must maintain electrical compatibility while accommodating potential differences in optical and mechanical characteristics.

Substiute Parts

3HTL-S

Bivar Inc.In Stock: 8683HTL-S Datasheet

Current PartRFQ

HLMP1700

onsemiIn Stock: 2257HLMP1700 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the 3HTL-S is based on strict electrical and mechanical parameter alignment. The following parameters define substitution eligibility:

• Electrical Compatibility: Forward voltage (Vf) of 1.8V and test current of 2mA must be maintained to ensure compatibility with existing circuit designs.
• Package Compatibility: T-1 3mm through-hole radial package is required for mechanical fit and board compatibility.
• Color and Wavelength: Red color emission at 635nm peak wavelength establishes the optical specification range.
• Mounting Type: Through-hole radial configuration is essential for existing PCB designs.

The HLMP1700 from onsemi meets these core electrical and mechanical requirements, supporting design continuity for the obsolete 3HTL-S.

Parameter Comparison

Engineering Selection Recommendations

The HLMP1700 (onsemi) serves as a functional equivalent to the 3HTL-S for through-hole red LED indication circuits. Both components share identical forward voltage (1.8V) and test current (2mA) ratings, ensuring direct electrical compatibility. Package compatibility is maintained with both components utilizing T-1 3mm radial through-hole configuration.

Optical differences exist between the two parts. The 3HTL-S provides 6.5mcd brightness at a 30° viewing angle, while the HLMP1700 delivers 2mcd brightness at a 50° viewing angle. These differences reflect lens transparency variations: the 3HTL-S uses a standard green lens while the HLMP1700 uses a diffused red lens. Component selection should account for application-specific brightness and viewing angle requirements.

Both components maintain equivalent compliance status with ECCN EAR99 and HTSUS 8541.41.0000 classifications. Moisture sensitivity is identical at MSL Level 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can the HLMP1700 directly replace the 3HTL-S in existing designs?

A: Electrical and mechanical substitution is supported, as both components share 1.8V forward voltage, 2mA test current, and T-1 3mm through-hole radial package specifications. Optical performance differs due to lens type variation, requiring evaluation of brightness and viewing angle requirements for the specific application.

Q: What are the primary differences between the 3HTL-S and HLMP1700?

A: The main differences are millicandela rating (6.5mcd vs 2mcd) and viewing angle (30° vs 50°). The 3HTL-S features a green lens (standard transparency), while the HLMP1700 features a red diffused lens. Peak wavelength (635nm) remains constant at both components.

Q: Are there compatibility concerns with PCB layout and mounting?

A: No. Both components use identical T-1 3mm radial through-hole package configuration, ensuring direct mechanical compatibility with existing PCB designs without layout modification.

Q: Does the HLMP1700 meet the same regulatory and compliance requirements?

A: Yes. Both components carry identical ECCN EAR99 and HTSUS 8541.41.0000 classifications, and both are classified as MSL Level 1 (Unlimited) for moisture sensitivity.

Q: What factors should guide selection between these parts?

A: Selection should be based on application brightness requirements and viewing angle specifications. The 3HTL-S provides higher brightness (6.5mcd) with a narrower viewing angle (30°), while the HLMP1700 provides lower brightness (2mcd) with a wider viewing angle (50°). Choose based on the specific indicator visibility requirements of the application.