LED LUXEON NEU WHITE 4000K LXH7-PW40 Equivalent & Substitute Parts

Part Overview

The LXH7-PW40 is a surface-mount LED from Lumileds' LUXEON Rebel ES series, designed for neutral white lighting applications at 4000K color temperature. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The part delivers 205 lm at 25°C under 700mA test conditions with a forward voltage of 2.9V and 120° viewing angle in a compact 1812 (4532 Metric) package.

Key Parameters

Parameter	Value
Manufacturer Part Number	LXH7-PW40
Manufacturer	Lumileds
Series	LUXEON Rebel ES
Product Status	Obsolete
Color	White, Neutral
CCT (K)	4000K
Flux @ 25°C, 700mA	205 lm (Typ)
Forward Voltage (Vf)	2.9V (Typ)
Current - Test	700mA
Current - Max	1A
Lumens/Watt @ Test Current	101 lm/W
CRI (Color Rendering Index)	70
Viewing Angle	120°
Mounting Type	Surface Mount
Package / Case	1812 (4532 Metric)
Size / Dimension	0.177" L x 0.120" W (4.49mm x 3.05mm)
Height - Seated (Max)	0.083" (2.10mm)
Thermal Resistance	6°C/W
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the obsolete LXH7-PW40 is determined by the following critical parameters:

Color temperature match: 4000K neutral white
Package compatibility: 1812 (4532 Metric) surface-mount form factor
Mechanical dimensions: 0.177" L x 0.120" W with maximum seated height of 0.083"
Electrical operating range: Forward voltage and maximum current ratings
Viewing angle: 120° beam pattern
Compliance certifications: RoHS3, REACH Unaffected status

The LX18-P140-3 from Lumileds' LUXEON Rebel PLUS series satisfies all substitution criteria. Both parts share identical package geometry, color temperature specification, viewing angle, and compliance requirements. The substitute represents an active product with enhanced performance characteristics while maintaining mechanical and thermal compatibility.

Parameter Comparison

Parameter	LXH7-PW40 (Main)	LX18-P140-3 (Substitute)
Manufacturer	Lumileds	Lumileds
Product Status	Obsolete	Active
Color	White, Neutral	White, Neutral
CCT (K)	4000K	4000K 3-Step MacAdam Ellipse
Forward Voltage (Vf) Typ	2.9V	2.76V
Current - Max	1A	1A
CRI (Color Rendering Index)	70	80
Viewing Angle	120°	120°
Mounting Type	Surface Mount	Surface Mount
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)
Size / Dimension	0.177" L x 0.120" W (4.49mm x 3.05mm)	0.177" L x 0.120" W (4.49mm x 3.05mm)
Height - Seated (Max)	0.083" (2.10mm)	0.083" (2.10mm)
Thermal Resistance	6°C/W	9°C/W
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The LX18-P140-3 is the manufacturer-recommended substitute for the obsolete LXH7-PW40. Both components maintain identical mechanical compatibility and package specifications, enabling direct PCB layout reuse without redesign.

The substitute part is classified as active product status, ensuring long-term availability and supply chain continuity. Both parts carry equivalent compliance certifications: ROHS3 Compliant and REACH Unaffected status, meeting regulatory requirements for industrial and commercial applications.

The LX18-P140-3 operates at a lower typical forward voltage (2.76V versus 2.9V) and delivers improved color rendering performance (CRI 80 versus CRI 70). These characteristics represent functional enhancements within the same electrical operating envelope (1A maximum current rating).

Frequently Asked Questions (FAQ)

Q: Can the LX18-P140-3 be used as a direct replacement for LXH7-PW40 without PCB modifications?

A: Yes. Both parts share identical package geometry (1812/4532 Metric), mechanical dimensions (0.177" L x 0.120" W, 0.083" max height), and mounting type (surface mount). No PCB layout changes are required.

Q: What are the key differences between these parts?

A: The LX18-P140-3 is an active product from the LUXEON Rebel PLUS series, while the LXH7-PW40 is obsolete from the LUXEON Rebel ES series. The substitute operates at lower forward voltage (2.76V vs 2.9V), provides higher color rendering index (CRI 80 vs 70), and has higher thermal resistance (9°C/W vs 6°C/W).

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the LXH7-PW40 and LX18-P140-3 are ROHS3 Compliant and REACH Unaffected, meeting regulatory requirements for electronic component applications.

Q: What is the significance of the 3-Step MacAdam Ellipse specification on the substitute?

A: The 3-Step MacAdam Ellipse on the LX18-P140-3 indicates tighter color temperature tolerance and consistency across the 4000K neutral white specification compared to the main part.

Q: Is the thermal resistance difference (6°C/W vs 9°C/W) a concern for substitution?

A: The higher thermal resistance of the substitute (9°C/W) indicates slightly reduced thermal performance. Thermal design review is necessary if the original design operated at maximum current ratings or in high-ambient-temperature environments.

Q: What is the maximum current rating for both parts?

A: Both the LXH7-PW40 and LX18-P140-3 have a maximum current rating of 1A, ensuring compatibility within the same electrical operating envelope.

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