SM0603HC Red LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The SM0603HC is a red LED indicator manufactured by Bivar Inc. in the 0603 (1608 Metric) surface mount package. This discrete LED operates at 1.8V forward voltage with a 643nm dominant wavelength and 15mcd brightness rating. The component features a clear colorless lens with a rectangular flat-top design and 130° viewing angle. The SM0603HC maintains Active product status with ROHS3 compliance and is available in Tape & Reel packaging.

Equivalent and substitute parts are identified based on matching mechanical package dimensions, surface mount compatibility, and electrical operating parameters within acceptable tolerance ranges for red LED indication applications.

Substiute Parts

SM0603HC

Bivar Inc.In Stock: 768SM0603HC Datasheet

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BR1111C-TR

Stanley Electric CoIn Stock: 19550BR1111C-TR Datasheet

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HSMS-C190

Broadcom LimitedIn Stock: 84371HSMS-C190 Datasheet

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XZMDK53W-3

SunLEDIn Stock: 2672XZMDK53W-3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM0603HC are identified based on the following criteria:

Mechanical Compatibility: All substitute parts must use the 0603 (1608 Metric) package with surface mount configuration. Physical dimensions of 1.60mm length and 0.80mm width are mandatory. Height variation is acceptable within component design limits.

Electrical Parameters: Forward voltage (Vf) must operate within the range of 1.7V to 2.1V at 20mA test current. Wavelength dominant specification must fall within the red spectrum (626nm to 647nm). Millicandela rating variation is acceptable based on lens transparency differences.

Optical Characteristics: Lens style must be rectangle with flat-top configuration. Lens transparency may vary between clear and diffused types. Viewing angle variation is acceptable within the range of 120° to 170°.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and EAR99 ECCN classification. Moisture sensitivity level (MSL) rating of 2A to 4 is acceptable.

Product Status: Active status is preferred; Obsolete status parts are identified but noted for inventory consideration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - XZMDK53W-3 (SunLED): This part maintains Active product status with ROHS3 compliance. The 1.95V forward voltage and 630nm dominant wavelength fall within acceptable red LED specification ranges. The clear lens transparency matches the SM0603HC optical characteristic. The 79mcd brightness rating provides enhanced luminous intensity compared to the original 15mcd specification. Height reduction to 0.45mm offers improved PCB clearance in space-constrained applications. Tape & Reel packaging matches the original component format.

Secondary Substitute - HSMS-C190 (Broadcom Limited): This part maintains Active product status with ROHS3 compliance and superior moisture sensitivity rating (2A vs. 4). The 2.1V forward voltage and 626nm dominant wavelength are within acceptable operating ranges. The diffused lens provides wider light distribution with 170° viewing angle. The 10mcd brightness rating is lower than the original specification. Cut Tape and Digi-Reel packaging options provide flexibility. REACH Unaffected status provides additional regulatory compliance documentation.

Tertiary Substitute - BR1111C-TR (Stanley Electric Co): This part carries Obsolete product status and requires inventory verification before selection. The 1.7V forward voltage and 647nm dominant wavelength are within acceptable ranges. The diffused lens provides 136° to 141° viewing angle. The 11.7mcd brightness rating approximates the original specification. Cut Tape packaging differs from the original Tape & Reel format. ROHS3 compliance and EAR99 classification are maintained.

Selection Criteria Summary: Active product status is preferred for new designs. Forward voltage tolerance of ±0.3V from the original 1.8V specification is acceptable. Wavelength variation within the red spectrum (626nm to 647nm) is acceptable for indication applications. Brightness variation is acceptable based on application requirements and lens transparency type. Package compatibility with surface mount assembly processes is mandatory.

Frequently Asked Questions (FAQ)

Q: Can the BR1111C-TR be used as a direct replacement for the SM0603HC?

A: The BR1111C-TR shares the same 0603 (1608 Metric) package and surface mount configuration. However, the part carries Obsolete product status, which may limit future availability. The 1.7V forward voltage and diffused lens characteristics differ from the SM0603HC. Substitution is mechanically and electrically feasible but requires verification of long-term supply chain availability.

Q: What is the difference between clear and diffused lens types in these LED substitutes?

A: The SM0603HC and XZMDK53W-3 feature clear colorless lenses that provide focused light output with directional intensity. The BR1111C-TR and HSMS-C190 feature diffused white lenses that scatter light over a wider area, resulting in lower peak brightness but broader viewing angles. Clear lenses are suitable for applications requiring concentrated light output; diffused lenses are suitable for applications requiring uniform light distribution.

Q: Is the XZMDK53W-3 height reduction from 0.80mm to 0.45mm compatible with existing PCB designs?

A: The reduced height of 0.45mm is mechanically compatible with standard 0603 package footprints. The component will sit lower on the PCB, which may improve clearance in space-constrained designs. Assembly equipment and reflow profiles remain unchanged. Verify that the lower component height does not interfere with adjacent components or mechanical constraints in the specific application.

Q: What does the MSL (Moisture Sensitivity Level) rating indicate for these LED components?

A: MSL rating indicates the maximum time a component can be exposed to ambient conditions (typically 30°C / 85% relative humidity) before requiring baking. The SM0603HC and BR1111C-TR have MSL 4 (72 hours), the XZMDK53W-3 has MSL 3 (168 hours), and the HSMS-C190 has MSL 2A (4 weeks). Higher MSL ratings provide longer shelf life and greater tolerance to storage conditions. The HSMS-C190 offers the most favorable moisture handling characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed (BR1111C-TR, HSMS-C190, and XZMDK53W-3) maintain ROHS3 compliance. The SM0603HC also carries ROHS3 certification. All parts are classified as EAR99 for export control purposes. The HSMS-C190 and XZMDK53W-3 additionally carry REACH Unaffected status, providing enhanced regulatory documentation.

Q: What is the significance of the wavelength dominant versus wavelength peak specifications?

A: Wavelength dominant indicates the primary color perception of the LED output. Wavelength peak indicates the actual peak spectral output. For the SM0603HC, the 643nm dominant wavelength provides the perceived red color, while the 660nm peak wavelength represents the actual spectral maximum. All substitute parts maintain red color perception within the 626nm to 647nm dominant wavelength range, ensuring consistent visual appearance across applications.

Q: Can the HSMS-C190 be used in applications requiring the original 1.8V forward voltage specification?

A: The HSMS-C190 operates at 2.1V forward voltage, which is 0.3V higher than the SM0603HC. This voltage difference requires circuit design verification. If the application uses a current-limiting resistor, the resistor value must be recalculated to maintain 20mA test current at the higher forward voltage. Direct pin-for-pin substitution without circuit modification may result in reduced LED brightness or circuit malfunction.

Q: What packaging format differences exist between these substitute parts?

A: The SM0603HC and XZMDK53W-3 are supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. The BR1111C-TR is supplied in Cut Tape (CT) format, requiring manual component feeding or tape-to-reel conversion. The HSMS-C190 offers both Cut Tape (CT) and Digi-Reel® packaging options. Tape & Reel format is preferred for high-volume production; Cut Tape format is suitable for prototyping and low-volume applications.