SM0603RC LED Red Clear 0603 SMD Equivalent & Substitute Parts

Part Overview

The SM0603RC is a red LED indication component manufactured by Bivar Inc. in 0603 (1608 Metric) surface mount package format. This discrete LED operates at 2V forward voltage with a 645nm dominant wavelength and 1mcd luminous intensity. The component is actively produced and maintains ROHS3 compliance with MSL 4 rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the same package category, mounting type, and primary application class. Alternative sources become necessary due to supply availability, lead time requirements, or inventory constraints.

Substiute Parts

SM0603RC

Bivar Inc.In Stock: 857SM0603RC Datasheet

Current PartRFQ

BR1111C-TR

Stanley Electric CoIn Stock: 19550BR1111C-TR Datasheet

SimilarRFQ

XZMDK53W-3

SunLEDIn Stock: 2672XZMDK53W-3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM0603RC is determined by the following criteria:

Primary Compatibility Parameters:

• Package / Case: 0603 (1608 Metric)
• Mounting Type: Surface Mount
• Color: Red
• Current - Test: 20mA
• RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

• Voltage - Forward (Vf): Range 1.7V to 2.0V
• Wavelength - Dominant: Range 630nm to 647nm
• Viewing Angle: Minimum 120°
• Size / Dimension: 1.60mm L x 0.80mm W (fixed)
• Height (Max): 0.45mm to 0.80mm

The identified substitute parts BR1111C-TR and XZMDK53W-3 maintain mechanical compatibility through identical package dimensions and surface mount configuration. Both parts operate within acceptable forward voltage and wavelength parameters for red LED indication applications. Lens transparency differs (diffused vs. clear), which affects light distribution characteristics but does not prevent functional substitution in standard indication circuits.

Parameter Comparison

Engineering Selection Recommendations

SM0603RC (Primary Component) The SM0603RC remains the preferred selection for new designs. Active product status ensures continued availability and manufacturing consistency. ROHS3 compliance and MSL 4 rating support standard assembly processes.

BR1111C-TR (Stanley Electric Co) This substitute carries Obsolete product status, indicating discontinued manufacturing. While ROHS3 compliant with matching MSL 4 rating, the obsolete designation limits long-term supply reliability. The 1.7V forward voltage is 0.3V lower than the main part, requiring circuit verification for voltage-sensitive applications. Diffused lens transparency alters light distribution compared to the clear lens of SM0603RC. Higher millicandela rating (11.7mcd vs. 1mcd) indicates increased luminous intensity. Packaging format differs (Cut Tape vs. Tape & Reel), affecting assembly line compatibility.

XZMDK53W-3 (SunLED) This substitute maintains Active product status with improved MSL 3 rating (168 Hours vs. 72 Hours), providing superior moisture protection during storage. Forward voltage of 1.95V remains within acceptable tolerance of the main part. Clear lens transparency matches the SM0603RC optical characteristic. Significantly higher millicandela rating (79mcd) indicates substantially increased brightness. Height reduction to 0.45mm (vs. 0.80mm) may affect PCB layout clearance in space-constrained designs. Wavelength shift to 630nm (dominant) represents a 15nm reduction from the main part, producing a slightly more orange-red appearance. Tape & Reel packaging maintains assembly line compatibility.

Frequently Asked Questions (FAQ)

Q: Can BR1111C-TR be used as a direct replacement for SM0603RC?

A: Mechanical compatibility exists through identical 0603 package dimensions and surface mount configuration. However, the 1.7V forward voltage differs from the 2.0V specification of SM0603RC. Circuit design must accommodate this voltage difference. The diffused lens produces different light distribution than the clear lens. Obsolete product status presents supply risk for future requirements.

Q: What is the primary difference between BR1111C-TR and XZMDK53W-3?

A: BR1111C-TR features a diffused lens with 11.7mcd brightness and carries Obsolete status. XZMDK53W-3 features a clear lens with 79mcd brightness and maintains Active status. XZMDK53W-3 provides superior moisture sensitivity level (MSL 3 vs. MSL 4). Forward voltage differs: BR1111C-TR at 1.7V, XZMDK53W-3 at 1.95V.

Q: Does lens transparency affect substitution compatibility?

A: Lens transparency determines light distribution pattern. Clear lenses produce focused light output; diffused lenses scatter light over a wider area. Application requirements determine whether this difference is acceptable. Indication circuits typically tolerate both configurations, but optical design specifications must be verified.

Q: How does the millicandela rating difference impact circuit design?

A: Millicandela rating indicates luminous intensity at the test current (20mA). SM0603RC provides 1mcd, BR1111C-TR provides 11.7mcd, and XZMDK53W-3 provides 79mcd. Higher ratings produce brighter indication. Series resistor values in the LED circuit may require adjustment to maintain consistent brightness perception across different parts.

Q: Is packaging format (Tape & Reel vs. Cut Tape) significant for substitution?

A: Packaging format affects assembly line compatibility and handling. Tape & Reel (TR) format supports automated pick-and-place equipment. Cut Tape (CT) format requires manual handling or different feeder systems. SM0603RC and XZMDK53W-3 use Tape & Reel; BR1111C-TR uses Cut Tape. Assembly process compatibility must be verified before substitution.

Q: What does the Obsolete product status mean for BR1111C-TR?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available from distributors, but supply is finite and non-renewable. Long-term design reliability cannot be assured. New designs should avoid obsolete components.

Q: Can XZMDK53W-3 be used in applications requiring the exact 2.0V forward voltage of SM0603RC?

A: XZMDK53W-3 operates at 1.95V typical forward voltage, a 0.05V difference from SM0603RC. For most indication applications, this tolerance is acceptable. Precision voltage-dependent circuits should be evaluated individually. The difference represents 2.5% variation from the main part specification.

Q: Does the height difference between SM0603RC (0.80mm) and XZMDK53W-3 (0.45mm) affect PCB design?

A: The 0.35mm height reduction of XZMDK53W-3 may provide clearance benefits in space-constrained designs. However, this difference should not affect standard PCB layouts. Component placement and solder joint formation remain compatible with 0603 package specifications.

Q: What compliance certifications are maintained across all three parts?

A: All three parts maintain ROHS3 compliance. SM0603RC and BR1111C-TR carry MSL 4 rating (72 Hours). XZMDK53W-3 carries MSL 3 rating (168 Hours), providing superior moisture protection. REACH status is unaffected for BR1111C-TR and XZMDK53W-3. All parts carry EAR99 ECCN classification.