ASM3-SWD1-NPRHH LED Horticulture White Cool 7500K Equivalent & Substitute Parts

Part Overview

The ASM3-SWD1-NPRHH is a surface mount LED designed for horticulture lighting applications, emitting cool white light at 7500K color temperature. This component operates at 3V forward voltage with a 350mA test current and delivers 125mW flux at 25°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

ASM3-SWD1-NPRHH

Broadcom LimitedIn Stock: 1048ASM3-SWD1-NPRHH Datasheet

Current PartRFQ

ASM6-SWD1-NQTHH

Broadcom LimitedIn Stock: 5296ASM6-SWD1-NQTHH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASM6-SWD1-NQTHH qualifies as a functional substitute for the ASM3-SWD1-NPRHH based on the following alignment of critical parameters:

Matching Parameters:

• Color: White, Cool (both parts)
• Viewing Angle: 130° (identical)
• Package Footprint: 3.45mm x 3.45mm (identical physical dimensions)
• Mounting Type: Surface Mount (identical)
• Compliance: ROHS3 Compliant, REACH Unaffected (both parts)
• Application: Horticulture lighting series

Allowable Variations:

• CCT: ASM6 operates at 6500K versus ASM3 at 7500K (both within cool white spectrum for horticulture)
• Voltage: ASM6 at 3.3V versus ASM3 at 3V (0.3V difference, within typical circuit tolerance)
• Current - Test: ASM6 at 700mA versus ASM3 at 350mA (ASM6 operates at higher efficiency)
• Flux Output: ASM6 delivers 264lm at 700mA versus ASM3 at 125mW at 350mA (ASM6 provides higher luminous output)
• CRI: ASM6 at 80 versus ASM3 at 70 (improved color rendering)
• Height: ASM6 at 0.081" (2.05mm) versus ASM3 at 0.085" (2.15mm) (minimal clearance difference)

Parameter Comparison

Engineering Selection Recommendations

The ASM6-SWD1-NQTHH is the manufacturer-recommended substitute for the obsolete ASM3-SWD1-NPRHH. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

The ASM6 offers improved performance characteristics: higher luminous efficiency (114 lm/W), superior color rendering index (80 versus 70), and lower thermal resistance (4°C/W versus 15°C/W). The MSL rating improves from 3 to 1, reducing moisture-related handling constraints.

Circuit design modifications are required to accommodate the 0.3V forward voltage increase (3V to 3.3V) and the higher test current (350mA to 700mA). The identical footprint and viewing angle ensure mechanical compatibility without PCB redesign. Height reduction of 0.004" (0.1mm) presents no clearance concerns in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the ASM6-SWD1-NQTHH be used as a direct drop-in replacement for the ASM3-SWD1-NPRHH?

A: Mechanical compatibility is confirmed due to identical footprint dimensions (3.45mm x 3.45mm) and viewing angle (130°). Electrical circuit modifications are necessary to accommodate the 0.3V forward voltage increase and higher operating current. PCB layout changes are not required.

Q: What is the impact of the 1000K color temperature difference (7500K to 6500K)?

A: Both color temperatures fall within the cool white spectrum designated for horticulture lighting applications. The 6500K output of the ASM6 remains within the specified range of 5000K to 10000K for the original part. Application-specific spectral requirements should be evaluated against crop or plant growth specifications.

Q: How does the increased current rating affect circuit design?

A: The ASM6 operates at 700mA test current versus 350mA for the ASM3. Maximum current ratings increase from 700mA to 1A. Current-limiting resistor or driver circuit values must be recalculated to maintain appropriate forward current for the intended application. Thermal management may improve due to the lower thermal resistance of the ASM6 (4°C/W versus 15°C/W).

Q: Are there packaging differences between these parts?

A: The ASM3 uses 1414 (3535 Metric) packaging while the ASM6 uses 3-SMD, No Lead packaging. Both maintain identical footprint dimensions and surface mount compatibility. Tape & Reel (TR) packaging for the ASM6 differs from the Cut Tape (CT) & Digi-Reel® packaging of the ASM3, affecting procurement and handling procedures.

Q: What is the significance of the MSL rating change from 3 to 1?

A: The MSL 3 rating of the ASM3 requires reflow processing within 168 hours of moisture exposure. The MSL 1 rating of the ASM6 eliminates this time constraint, allowing unlimited shelf life without baking. This reduces storage and handling complexity in manufacturing environments.

Q: Does the improved CRI (80 versus 70) affect horticulture lighting performance?

A: Higher CRI values indicate more accurate color rendering of plant materials under the LED light. The ASM6 CRI of 80 provides improved spectral fidelity compared to the ASM3 CRI of 70, potentially enhancing visual assessment of plant health and growth characteristics in horticulture applications.