MPY5379K LED Green Diffused Through-Hole Equivalent & Substitute Parts

Part Overview

The MPY5379K is a green LED indication component manufactured by Stanley Electric Co., featuring a 572nm dominant wavelength and 2.1V forward voltage rating. This through-hole mounted device is classified as obsolete, necessitating identification of functionally equivalent substitute components for ongoing production requirements and design updates. The part delivers 40 millicandela intensity with a diffused rectangular lens configuration optimized for indicator applications.

Substiute Parts

MPY5379K

Stanley Electric CoIn Stock: 805MPY5379K Datasheet

Current PartRFQ

SLR-56MC3F

Rohm SemiconductorIn Stock: 12414SLR-56MC3F Datasheet

SimilarRFQ

SSL-LX25583YD

Lumex Opto/Components Inc.In Stock: 686SSL-LX25583YD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the MPY5379K are evaluated based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Color: Green
• Wavelength - Dominant: 572nm
• Voltage - Forward (Vf): 2.1V
• Mounting Type: Through Hole
• Package / Case: Radial

Secondary Compatibility Factors:

• Millicandela Rating: 40mcd (allowable tolerance range)
• Current - Test: 20mA (operational current specification)
• Lens Transparency: Diffused (optical diffusion characteristic)
• Lens Style: Rectangle with Domed Top (form factor)
• Height (Max): 8.70mm (physical clearance constraint)

Substitutes are identified where the dominant wavelength, forward voltage, and mounting configuration align with the original specification. Variations in lens geometry, transparency type, and intensity rating are noted as design trade-offs requiring circuit-level validation.

Parameter Comparison

Engineering Selection Recommendations

SLR-56MC3F (Rohm Semiconductor) - Primary Green LED Substitute:

The SLR-56MC3F provides the closest electrical equivalence to the MPY5379K, matching the 572nm dominant wavelength and 2.1V forward voltage specification. Both components deliver 40 millicandela intensity and feature radial through-hole mounting. The SLR-56MC3F is classified as "Not For New Designs," indicating limited future availability but current stock presence (12,324 units). The primary design consideration is the transition from a diffused rectangular lens to a clear round T-1 3/4 lens, which increases the viewing angle from 25° to 40°. This optical characteristic change requires validation in the target application's light distribution requirements. The test current specification differs at 10mA versus the original 20mA, necessitating circuit-level current limiting adjustment.

SSL-LX25583YD (Lumex Opto/Components Inc.) - Alternative Consideration:

The SSL-LX25583YD is an active product offering superior long-term availability and RoHS3 compliance certification. However, this component is specified as yellow (not green) with a peak wavelength of 585nm, representing a significant optical departure from the 572nm green specification. The intensity rating of 10 millicandela is 75% lower than the original 40mcd specification. The SSL-LX25583YD features a diffused rectangular lens matching the original transparency type, with a wider viewing angle of 110°. This substitute is applicable only where color change from green to yellow is functionally acceptable and where reduced brightness meets application requirements.

Compliance and Regulatory Status:

Both substitute components maintain REACH Unaffected status and EAR99 export classification, matching the original part's regulatory profile. MSL rating of 1 (Unlimited) is consistent across all three components, indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the SLR-56MC3F directly replace the MPY5379K without circuit modifications?

A: Electrical substitution is feasible due to matching 2.1V forward voltage and 40mcd intensity ratings. However, the test current specification differs (10mA versus 20mA), requiring verification of the current-limiting resistor value in the host circuit. The optical characteristics change from a diffused rectangular lens to a clear round lens, altering light distribution patterns. Physical fit must be confirmed as the SLR-56MC3F height is 8.90mm versus the original 8.70mm.

Q: What are the key differences between the diffused and clear lens options?

A: The MPY5379K features a diffused lens that scatters light across a wider area with reduced peak intensity in the direct viewing direction. The SLR-56MC3F clear lens concentrates light more directly, resulting in higher brightness in the primary viewing axis but a narrower effective viewing angle. Diffused lenses are typically preferred for indicator applications where uniform brightness across a wide viewing angle is required.

Q: Is the SSL-LX25583YD suitable as a green LED substitute?

A: The SSL-LX25583YD is specified as yellow with a 585nm peak wavelength, not green. This component is not suitable for applications requiring green indication. Selection of this part is limited to applications where yellow indication is functionally equivalent or where color change is acceptable.

Q: What is the significance of the "Not For New Designs" status on the SLR-56MC3F?

A: This designation indicates that Rohm Semiconductor is not recommending this component for new product development, typically due to planned discontinuation or replacement by newer alternatives. Current inventory availability is confirmed at 12,324 units, but future procurement may become constrained. For long-term production requirements, the SSL-LX25583YD (Active status) offers superior availability assurance, subject to color and intensity compatibility validation.

Q: How do viewing angle differences affect circuit design?

A: The MPY5379K specifies 25° and 19° viewing angles, indicating a narrow, focused light emission pattern. The SLR-56MC3F provides 40° viewing angle, and the SSL-LX25583YD provides 110°. Wider viewing angles distribute the same luminous intensity across a larger area, reducing peak brightness in any single direction. Circuit design must account for these differences when calculating required forward current to achieve target brightness levels at specific viewing angles.

Q: Are there any height clearance constraints when substituting these components?

A: The original MPY5379K specifies a maximum height of 8.70mm. The SLR-56MC3F is 8.90mm (0.20mm taller), and the SSL-LX25583YD is 8.00mm (0.70mm shorter). PCB layout and enclosure design must accommodate these dimensional variations to prevent mechanical interference or aesthetic misalignment.

Q: What compliance certifications are maintained across all substitute options?

A: All three components maintain REACH Unaffected status, EAR99 export classification, and MSL 1 (Unlimited) moisture sensitivity rating. The SLR-56MC3F and SSL-LX25583YD both carry RoHS3 compliance certification, exceeding the original part's regulatory profile.