CLM1S-WKW-CTBVB153 Equivalent & Substitute Parts

Part Overview

The CLM1S-WKW-CTBVB153 is a cool white diffused LED indicator manufactured by CreeLED, Inc., specified for 5500K color temperature with 737.5mcd luminous intensity. This part operates at 3.4V forward voltage with a 20mA test current and features a 2-SMD, J-Lead package in a 3.20mm × 2.70mm form factor with 2.05mm maximum height.

The CLM1S-WKW-CTBVB153 is classified as obsolete. Equivalent substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	CLM1S-WKW-CTBVB153
Manufacturer	CreeLED, Inc.
Color	White, Cool
Wavelength - Dominant	5500K
Voltage - Forward (Vf) (Typ)	3.4V
Current - Test	20mA
Millicandela Rating	737.5mcd
Lens Transparency	Diffused
Lens Color	Yellow
Viewing Angle	120°
Mounting Type	Surface Mount
Package / Case	2-SMD, J-Lead
Size / Dimension	3.20mm L × 2.70mm W
Height (Max)	2.05mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the CLM1S-WKW-CTBVB153 are selected based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Color: White, Cool (5500K nominal or within cool white spectrum)
Voltage - Forward (Vf): 3.2V to 3.4V range
Current - Test: 20mA
Lens Transparency: Diffused
Lens Color: Yellow
Viewing Angle: 120°
Mounting Type: Surface Mount
Physical compatibility: Similar footprint and height envelope

Substitute Parts Identified:

All substitute parts are manufactured by Broadcom Limited and belong to the ASMT-UWB1 base product family. These parts are active products with RoHS3 compliance and improved moisture sensitivity ratings (MSL 3 vs. MSL 5A for the original part).

The following Broadcom parts meet the substitution criteria:

ASMT-UWB1-NX302 (Cool White 4500K–8000K range)
ASMT-UWB1-NX3A2 (Cool White 8000K)
ASMT-UWB1-NX3B2 (Cool White 6500K)
ASMT-UWB1-NX3C2 (Cool White 5700K)
ASMT-UWB1-NX3D2 (Cool White 5000K)
ASMT-UWB1-NX3E2 (Neutral White 4500K)
ASMT-UWB1-NX3F2 (Neutral White 4000K)

Parts ASMT-UWB1-NX312, ASMT-UWB1-NX3G2, and ASMT-UWB1-NX3H2 are warm white variants and are not recommended as direct substitutes due to color temperature deviation from the original 5500K specification.

Parameter Comparison

Parameter	CLM1S-WKW-CTBVB153	ASMT-UWB1-NX302	ASMT-UWB1-NX3A2	ASMT-UWB1-NX3B2	ASMT-UWB1-NX3C2	ASMT-UWB1-NX3D2	ASMT-UWB1-NX3E2	ASMT-UWB1-NX3F2
Manufacturer	CreeLED, Inc.	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Color	White, Cool	White, Cool	White, Cool	White, Cool	White, Cool	White, Cool	White, Neutral	White, Neutral
Wavelength - Dominant	5500K	4500K–8000K	8000K	6500K	5700K	5000K	4500K	4000K
Voltage - Forward (Vf) (Typ)	3.4V	3.2V	3.2V	3.2V	3.2V	3.2V	3.2V	3.2V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	737.5mcd	2300mcd	2300mcd	2300mcd	2300mcd	2300mcd	2300mcd	2300mcd
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Color	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow
Viewing Angle	120°	120°	120°	120°	120°	120°	120°	120°
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD, J-Lead	4-SMD, Flat Lead Exposed Pad	2-PLCC	4-SMD, Flat Lead Exposed Pad	4-SMD, Flat Lead Exposed Pad	2-PLCC	4-SMD, Flat Lead Exposed Pad	4-SMD, Flat Lead Exposed Pad
Size / Dimension	3.20mm L × 2.70mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W	3.20mm L × 2.80mm W
Height (Max)	2.05mm	2.10mm	2.10mm	2.10mm	2.10mm	2.10mm	2.10mm	2.10mm
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	5A (24 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Primary Recommendation: ASMT-UWB1-NX3C2

ASMT-UWB1-NX3C2 provides the closest color temperature match at 5700K, within acceptable tolerance of the original 5500K specification. This part is active, RoHS3 compliant, and features improved moisture sensitivity (MSL 3 vs. MSL 5A). The 0.05mm increase in width and 0.05mm increase in height remain within typical PCB layout tolerances.

Secondary Recommendations (in order of color temperature proximity):

ASMT-UWB1-NX3B2 (6500K) – Active, RoHS3 compliant, suitable for applications where slightly cooler white is acceptable
ASMT-UWB1-NX3D2 (5000K) – Active, RoHS3 compliant, 2-PLCC package matches original footprint more closely
ASMT-UWB1-NX302 (4500K–8000K range) – Active, RoHS3 compliant, broadest color temperature range

Package Compatibility Note:

The original CLM1S-WKW-CTBVB153 uses a 2-SMD, J-Lead package. Most Broadcom substitutes use 4-SMD, Flat Lead Exposed Pad packages, which require PCB layout modifications. ASMT-UWB1-NX3A2 and ASMT-UWB1-NX3D2 use 2-PLCC packages, offering closer mechanical compatibility.

Compliance Advantage:

All recommended Broadcom substitutes are RoHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can ASMT-UWB1-NX302 be used as a direct replacement?

A: ASMT-UWB1-NX302 is electrically compatible with a 4500K–8000K color temperature range that encompasses the original 5500K specification. However, the 4-SMD, Flat Lead Exposed Pad package differs from the original 2-SMD, J-Lead package and requires PCB layout modification.

Q: What is the significance of the millicandela rating difference?

A: The substitute parts deliver 2300mcd compared to the original 737.5mcd. This higher luminous intensity is a performance enhancement and does not prevent substitution. Applications requiring the original lower intensity must incorporate current-limiting resistor adjustments.

Q: Are warm white variants (ASMT-UWB1-NX312, ASMT-UWB1-NX3G2, ASMT-UWB1-NX3H2) suitable substitutes?

A: No. These parts operate at 2700K–4000K color temperatures, which deviate significantly from the original 5500K cool white specification. Use only cool white or neutral white variants (4000K–8000K range).

Q: What is the impact of the 0.2V forward voltage reduction?

A: The substitute parts operate at 3.2V versus the original 3.4V. This 0.2V reduction is within typical LED tolerance ranges and does not prevent substitution. Circuit designs must accommodate this lower forward voltage through resistor recalculation to maintain proper current limiting.

Q: Which substitute offers the best package compatibility?

A: ASMT-UWB1-NX3D2 uses a 2-PLCC package, matching the original footprint more closely than 4-SMD variants. However, dimensional differences (3.20mm × 2.80mm vs. 3.20mm × 2.70mm) require verification against PCB layout constraints.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All Broadcom ASMT-UWB1 variants listed are RoHS3 compliant, meeting current environmental and regulatory requirements for new production.

Q: What is the advantage of MSL 3 over MSL 5A?

A: MSL 3 (168 hours) provides superior moisture resistance compared to MSL 5A (24 hours). This allows extended shelf life and more flexible storage conditions without requiring desiccant packaging or immediate assembly after opening.

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