HLMP1700L Red Diffused T-1 Through-Hole LED Equivalent & Substitute Parts

Part Overview

The HLMP1700L is a red diffused T-1 through-hole LED manufactured by Everlight Electronics Co Ltd, designed for red indication applications in discrete 1.8V radial configurations. This component is currently in active product status with 792 pieces in stock. The HLMP1700L operates at a forward voltage of 1.8V with a 2mA test current, delivering 2 millicandela brightness through a diffused red lens with a 50° viewing angle. The component is housed in a radial package with a maximum height of 6.30mm and complies with ROHS3 standards and MSL Level 1 specifications.

Equivalent and substitute parts become necessary when the original HLMP1700L reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative electrical or optical characteristics. The substitute parts listed maintain compatibility with through-hole mounting applications while offering variations in forward voltage, brightness output, wavelength, and viewing angle specifications.

Substiute Parts

HLMP1700L

Everlight Electronics Co LtdIn Stock: 840HLMP1700L Datasheet

Current PartRFQ

HLMP1700

onsemiIn Stock: 2257HLMP1700 Datasheet

Parametric EquivalentRFQ

SLI-343U8R3F

Rohm SemiconductorIn Stock: 25233SLI-343U8R3F Datasheet

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SLI-343U8RC3F

Rohm SemiconductorIn Stock: 1585SLI-343U8RC3F Datasheet

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SLI-343V8R3F

Rohm SemiconductorIn Stock: 2908SLI-343V8R3F Datasheet

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SLI-343V8RC3F

Rohm SemiconductorIn Stock: 10059SLI-343V8RC3F Datasheet

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WP710A10SRD/J4

KingbrightIn Stock: 12554WP710A10SRD/J4 Datasheet

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WP710A10SRD5V

KingbrightIn Stock: 1158WP710A10SRD5V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the HLMP1700L is determined by the following critical parameters that must be maintained or closely matched:

Critical Parameters (Must Match or Be Compatible):

• Color: Red
• Mounting Type: Through Hole
• Package / Case: Radial
• Lens Style: Round with Domed Top

Flexible Parameters (Allowable Variation):

• Voltage - Forward (Vf): Substitutes range from 1.8V to 2.2V; circuit design must accommodate voltage variation
• Current - Test: Substitutes range from 2mA to 20mA; current-limiting resistor must be adjusted accordingly
• Millicandela Rating: Substitutes range from 2mcd to 500mcd; brightness variation acceptable if application permits
• Viewing Angle: Substitutes range from 40° to 50°; narrower angles acceptable for focused indication
• Wavelength - Peak: Substitutes range from 620nm to 640nm; all within red spectrum for indication purposes
• Height (Max): Substitutes range from 5.40mm to 6.30mm; all compatible with standard PCB clearances
• Lens Transparency: Both diffused and clear lens options available; affects light distribution characteristics

The substitute parts are grouped into two categories: parametric equivalents (identical or near-identical specifications) and similar parts (compatible but with notable electrical or optical differences).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent - Highest Compatibility:

The HLMP1700 manufactured by onsemi provides the closest parametric match to the HLMP1700L, with identical forward voltage (1.8V), test current (2mA), viewing angle (50°), wavelength peak (635nm), and maximum height (6.30mm). This part maintains full electrical and optical compatibility with circuits designed for the HLMP1700L. However, the onsemi HLMP1700 is listed as obsolete product status, limiting long-term availability. This part is suitable for immediate replacement in active production only if supply is confirmed.

Active Status Substitutes - Recommended for New Designs:

The Rohm Semiconductor EXCELED™ series parts (SLI-343U8R3F, SLI-343U8RC3F, SLI-343V8R3F, SLI-343V8RC3F) are all active products with substantial inventory availability (1,545 to 25,153 pieces). These parts operate at 2.2V forward voltage with 20mA test current, requiring circuit modification through adjusted current-limiting resistor values. The brightness output ranges from 220mcd to 330mcd, representing a 110x to 165x increase over the HLMP1700L. The viewing angle narrows to 40°. All Rohm parts comply with ROHS3 standards and REACH regulations. Selection between diffused and clear lens options depends on application light distribution requirements.

The Kingbright WP710A10SRD/J4 is an active product with 12,515 pieces in inventory, operating at 2.1V forward voltage with 20mA test current and 500mcd brightness output. This part requires circuit modification and delivers the highest brightness among active substitutes. The wavelength peak is 660nm, slightly longer than the HLMP1700L's 635nm, remaining within acceptable red spectrum for indication applications.

Avoid for New Designs:

The WP710A10SRD5V (Kingbright) operates at 5V forward voltage, fundamentally incompatible with circuits designed for 1.8V operation. This part is also listed as obsolete product status. The onsemi HLMP1700, while parametrically equivalent, carries obsolete status and should not be selected for new designs requiring long-term supply assurance.

Compliance Verification:

All recommended active substitutes maintain ROHS3 compliance and MSL Level 1 specifications, ensuring regulatory compatibility and unlimited storage conditions. Verify that the selected substitute meets specific application wavelength requirements within the 620nm to 640nm range.

Frequently Asked Questions (FAQ)

Q: Can the HLMP1700L be directly replaced with the onsemi HLMP1700 without circuit modification?

A: Yes. The onsemi HLMP1700 is a parametric equivalent with identical forward voltage (1.8V), test current (2mA), viewing angle (50°), and wavelength peak (635nm). Direct substitution is electrically and mechanically compatible. However, the onsemi part is obsolete, limiting availability for long-term production.

Q: What circuit modifications are required when substituting with Rohm EXCELED™ series parts?

A: Rohm parts operate at 2.2V forward voltage compared to the HLMP1700L's 1.8V, and require 20mA test current versus 2mA. The current-limiting resistor value must be recalculated using Ohm's law: R = (Supply Voltage − Forward Voltage) / Desired Current. For example, in a 5V circuit: R = (5V − 2.2V) / 20mA = 140Ω. The brightness increase (220mcd to 330mcd) may require optical design review if the application is light-sensitive.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts maintain through-hole radial package configuration with compatible lens sizes (3.0mm to 3.10mm diameter). Maximum heights range from 5.40mm to 6.30mm, all within standard PCB clearance tolerances. Physical footprint compatibility is confirmed across all listed substitutes.

Q: What is the difference between diffused and clear lens options in the Rohm EXCELED™ series?

A: The SLI-343U8RC3F (clear lens) delivers 330mcd brightness with sharper light concentration, while the SLI-343U8R3F (diffused lens) delivers 220mcd with broader light distribution. Clear lens provides higher intensity in the primary viewing direction; diffused lens provides more uniform illumination across the 40° viewing angle. Application requirements determine the appropriate selection.

Q: Can the Kingbright WP710A10SRD5V be used as a substitute?

A: No. The WP710A10SRD5V operates at 5V forward voltage, fundamentally incompatible with circuits designed for 1.8V operation. This part is also obsolete product status. It is not recommended for any new or replacement applications.

Q: How do wavelength differences affect application performance?

A: The HLMP1700L operates at 635nm peak wavelength. Substitutes range from 620nm to 640nm dominant wavelength. All values remain within the red spectrum suitable for indication applications. Wavelength differences are imperceptible to human vision in indication applications but may affect performance in color-sensitive or spectral-specific applications. Verify wavelength compatibility with application requirements before final selection.

Q: What inventory considerations should guide substitute selection?

A: The Rohm SLI-343U8R3F offers the highest inventory (25,153 pieces), followed by the Kingbright WP710A10SRD/J4 (12,515 pieces) and Rohm SLI-343V8RC3F (10,045 pieces). The onsemi HLMP1700 (2,200 pieces) and Kingbright WP710A10SRD5V (1,068 pieces) have limited availability. For production applications requiring long-term supply assurance, select parts with higher inventory levels and active product status.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts comply with ROHS3 standards. The onsemi HLMP1700 does not specify REACH status in the provided data. All Rohm and Kingbright active parts confirm REACH Unaffected status, ensuring compliance with European chemical regulations.