SML312WBCW1 Equivalent & Substitute Parts

Part Overview

The SML312WBCW1 is a white LED indication component in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The component operates at 3.3V forward voltage with 200mcd brightness rating and is designed for discrete LED indication applications requiring clear lens optics.

Substiute Parts

SML312WBCW1

Rohm SemiconductorIn Stock: 756SML312WBCW1 Datasheet

Current PartRFQ

SMLD12WBN1W

Rohm SemiconductorIn Stock: 848SMLD12WBN1W Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML312WBCW1 is determined by the following critical parameters:

• Package compatibility: 0603 (1608 Metric) surface mount form factor
• Color specification: White LED
• Mounting type: Surface mount
• Lens geometry: Rectangle with flat top configuration
• Electrical operating range: Forward voltage and test current compatibility
• Compliance certifications: RoHS3 and REACH status

The SMLD12WBN1W qualifies as a substitute based on matching package, color, mounting type, and lens style. Variations in forward voltage (2.9V vs 3.3V), brightness rating (120mcd vs 200mcd), and physical height are within acceptable substitution parameters for LED indication applications where the primary functional requirement is visual indication rather than precise luminous intensity matching.

Parameter Comparison

Engineering Selection Recommendations

The SMLD12WBN1W is an active product with current manufacturing status, providing supply chain continuity for applications previously using the obsolete SML312WBCW1. Both components maintain identical RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Circuit design considerations must account for the forward voltage differential: the substitute operates at 2.9V compared to the original 3.3V specification. This 0.4V reduction requires current-limiting resistor recalculation to maintain the 5mA test current specification. The brightness reduction from 200mcd to 120mcd represents a 40% decrease in luminous intensity; applications requiring specific brightness levels must evaluate this parameter against functional requirements.

The reduced maximum height (0.65mm vs 0.90mm) of the substitute provides improved PCB clearance characteristics and may offer advantages in space-constrained designs. Both components share identical footprint dimensions and lens geometry, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMLD12WBN1W be used as a direct drop-in replacement for SML312WBCW1?

A: Physical footprint and mounting compatibility are identical, enabling direct PCB placement. However, circuit design modifications are required due to the 0.4V forward voltage difference. Current-limiting resistor values must be recalculated to maintain proper LED operation at the substitute's 2.9V specification.

Q: What is the impact of the brightness difference between these parts?

A: The substitute provides 120mcd compared to the original 200mcd rating. For applications where LED indication visibility is the primary function, this reduction may be acceptable. Applications requiring specific luminous intensity levels must evaluate whether 120mcd meets functional requirements.

Q: Are there compliance or certification differences between these parts?

A: Both components maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels are identical at MSL 3 (168 Hours). No compliance-related barriers exist for substitution.

Q: How does the height difference affect PCB design?

A: The substitute's reduced maximum height of 0.65mm versus 0.90mm provides additional clearance above the PCB surface. This may benefit designs with space constraints or components positioned in close proximity to the LED.

Q: What is the product status significance?

A: The original SML312WBCW1 is classified as obsolete, indicating discontinued manufacturing. The SMLD12WBN1W maintains active product status with current availability, ensuring long-term supply chain support for new designs and production continuity.