CMD9121VRC/TR10 Equivalent & Substitute Parts Reference

Part Overview

The CMD9121VRC/TR10 is a red LED indication component manufactured by Visual Communications Company (VCC), configured as a 2-SMD Z-Bend surface mount device with bottom entry mounting. This part features a clear lens with 1.90mm diameter, 80mcd brightness rating, and 2V forward voltage specification. The component is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity. Substitute components must maintain compatibility with the original electrical specifications, mechanical dimensions, and mounting configuration while meeting current availability and compliance standards.

Substiute Parts

CMD9121VRC/TR10

Visual Communications Company - VCCIn Stock: 711CMD9121VRC/TR10 Datasheet

Current PartRFQ

AM2520EC09

KingbrightIn Stock: 15883AM2520EC09 Datasheet

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AM27SURCK09

KingbrightIn Stock: 807AM27SURCK09 Datasheet

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SSL-LXA228SRC-TR31

Lumex Opto/Components Inc.In Stock: 3296SSL-LXA228SRC-TR31 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMD9121VRC/TR10 are selected based on strict alignment with the following critical parameters:

Primary Compatibility Criteria:

• Color: Red
• Lens Transparency: Clear
• Mounting Type: Surface Mount, Bottom Entry
• Package Configuration: 2-SMD, Z-Bend
• Lens Style: Round with Domed Top
• Lens Size: 1.90mm Diameter (primary); 1.78mm acceptable within mechanical tolerance
• Voltage - Forward (Vf): 2V nominal (range 1.7V to 2V acceptable)
• Viewing Angle: 20° to 25° (compatible range)
• RoHS Compliance: ROHS3 Compliant
• REACH Status: REACH Unaffected

Secondary Parameters (Allowable Variation):

• Millicandela Rating: 50mcd to 2400mcd (brightness variation acceptable based on circuit design)
• Wavelength - Peak: 617nm to 660nm (red spectrum range)
• Height (Max): 2.90mm to 3.00mm (within PCB assembly tolerance)
• MSL Rating: 3 to 4 (storage condition compatibility)

The three substitute parts listed below meet these criteria and are classified as active products with current manufacturing status and improved inventory availability compared to the obsolete CMD9121VRC/TR10.

Parameter Comparison

Engineering Selection Recommendations

AM2520EC09 (Kingbright)

The AM2520EC09 provides the closest electrical and mechanical match to the CMD9121VRC/TR10. This part maintains identical forward voltage (2V), lens diameter (1.90mm), package dimensions (2.50mm L x 2.00mm W), and mounting configuration (Surface Mount, Bottom Entry). The 50mcd brightness rating is lower than the original 80mcd specification but remains within acceptable tolerance for standard indication applications. The part is classified as active with substantial inventory availability (15,780 pcs). RoHS3 compliance and REACH unaffected status align with the original specification. MSL rating of 3 (168 Hours) matches the original component.

SSL-LXA228SRC-TR31 (Lumex Opto/Components Inc.)

The SSL-LXA228SRC-TR31 offers excellent compatibility with identical lens diameter (1.90mm), package dimensions (2.50mm L x 2.00mm W), and viewing angle (25°) matching the original part. Forward voltage is 1.7V, representing a 0.3V reduction from the 2V specification, which is acceptable within standard LED circuit design tolerances. The 100mcd brightness rating exceeds the original 80mcd specification. This part is active with good inventory availability (3,200 pcs). RoHS3 compliance and REACH unaffected status are maintained. MSL rating of 4 (72 Hours) provides more stringent moisture protection than the original MSL 3 rating.

AM27SURCK09 (Kingbright)

The AM27SURCK09 is suitable for applications where higher brightness output is required. This part delivers 2400mcd, significantly exceeding the original 80mcd specification. Forward voltage is 1.95V, within acceptable tolerance of the 2V original specification. Lens diameter is 1.78mm, representing a 0.12mm reduction from the original 1.90mm, which remains within standard mechanical assembly tolerances. Package dimensions (2.21mm L x 2.21mm W) differ slightly from the original (2.50mm L x 2.00mm W) but maintain compatibility with standard 2-SMD Z-Bend footprints. The part is active with moderate inventory (780 pcs). RoHS3 compliance and REACH unaffected status are maintained. MSL rating of 3 (168 Hours) matches the original component.

Frequently Asked Questions (FAQ)

Q: Can the AM2520EC09 be used as a direct replacement for CMD9121VRC/TR10?

A: Yes. The AM2520EC09 maintains identical forward voltage (2V), lens diameter (1.90mm), package dimensions, and mounting configuration. The 50mcd brightness rating is lower than the original 80mcd but is acceptable for standard indication applications. Both parts are ROHS3 compliant with matching MSL ratings.

Q: What is the primary difference between the three substitute parts?

A: The primary difference is brightness output. AM2520EC09 provides 50mcd (lower than original), SSL-LXA228SRC-TR31 provides 100mcd (closest to original), and AM27SURCK09 provides 2400mcd (significantly higher). Forward voltage also varies: AM2520EC09 at 2V (exact match), AM27SURCK09 at 1.95V, and SSL-LXA228SRC-TR31 at 1.7V.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (AM2520EC09, AM27SURCK09, and SSL-LXA228SRC-TR31) are ROHS3 compliant and REACH unaffected, matching the original CMD9121VRC/TR10 compliance status.

Q: Does the SSL-LXA228SRC-TR31 lower forward voltage (1.7V vs. 2V) affect circuit compatibility?

A: The 0.3V reduction is within standard LED circuit design tolerances. Most LED indication circuits accommodate forward voltage variations of ±0.3V without circuit modification. However, circuit-specific validation is necessary if the original design operates at the upper voltage limit.

Q: Can AM27SURCK09 be used in place of CMD9121VRC/TR10 if higher brightness is needed?

A: Yes, if the application requires higher brightness output. The AM27SURCK09 delivers 2400mcd compared to the original 80mcd. The 1.78mm lens diameter (vs. 1.90mm original) and slightly different package dimensions (2.21mm L x 2.21mm W vs. 2.50mm L x 2.00mm W) remain within standard 2-SMD Z-Bend footprint compatibility. Forward voltage of 1.95V is within acceptable tolerance.

Q: What is the inventory status of each substitute part?

A: AM2520EC09 has the highest availability with 15,780 pcs in stock. SSL-LXA228SRC-TR31 has 3,200 pcs available. AM27SURCK09 has the lowest availability with 780 pcs in stock. The original CMD9121VRC/TR10 has 664 pcs remaining as obsolete stock.

Q: Are there differences in moisture sensitivity between the substitute parts?

A: Yes. AM2520EC09 and AM27SURCK09 both have MSL 3 (168 Hours), matching the original part. SSL-LXA228SRC-TR31 has MSL 4 (72 Hours), indicating more stringent moisture protection requirements during storage and handling.

Q: Which substitute part provides the closest overall match to the original CMD9121VRC/TR10?

A: SSL-LXA228SRC-TR31 provides the closest match in viewing angle (25° vs. 25°), lens diameter (1.90mm), and package dimensions (2.50mm L x 2.00mm W). Brightness output of 100mcd is closest to the original 80mcd specification. However, AM2520EC09 matches the exact forward voltage (2V) and MSL rating (3), making it the preferred choice for voltage-sensitive applications.