LED LH351Z COOL WHITE 5000K 3535 Equivalent & Substitute Parts (SPHWHTL3D20CE3RTH3)

Part Overview

The Samsung Semiconductor LH351Z series LED (SPHWHTL3D20CE3RTH3) is a surface-mount white LED in 3535 metric package (1414) designed for general lighting applications. This component operates at 5000K color temperature (cool white) with a forward voltage of 2.9V and test current of 350mA, delivering 120 lumens at 85°C. The product is currently obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain compatibility across electrical characteristics, mechanical dimensions, thermal properties, and mounting specifications to ensure direct replacement capability in existing designs.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Package / Case	1414 (3535 Metric)	-	Critical - Physical footprint compatibility
Mounting Type	Surface Mount	-	Critical - PCB assembly method
Color / CCT	White, Cool / 5000K	K	Critical - Light output characteristics
Voltage - Forward (Vf) Typical	2.9V	V	Critical - Circuit design compatibility
Current - Test	350mA	mA	Critical - Operating point specification
Flux @ 85°C, Current - Test	120lm (110-130lm)	lm	Important - Light output performance
Viewing Angle	115°	°	Important - Beam distribution
Thermal Resistance of Package	7°C/W	°C/W	Important - Heat dissipation capability
Size / Dimension	3.50mm x 3.50mm	mm	Critical - PCB layout fit
Height - Seated (Max)	2.06mm	mm	Important - Clearance and assembly
CRI (Color Rendering Index)	70	-	Important - Color quality specification
RoHS Status	RoHS Compliant	-	Critical - Regulatory compliance

Substitute Part Grouping Explanation

Substitute parts are identified based on strict alignment with the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 1414 (3535 Metric) surface mount only
Mounting Type: Surface Mount
Viewing Angle: 115° (exact match required)
Current - Test: 350mA (exact match required)
Voltage - Forward (Vf): 2.85V nominal (within 0.05V tolerance of 2.9V specification)

Secondary Compatibility Criteria:

Color: White (all variants acceptable: Warm, Neutral, Cool)
CCT Range: 2200K to 6500K (application-dependent selection)
Flux Output: Minimum 77 lm/W efficiency maintained
Thermal Resistance: 5°C/W (improved thermal performance acceptable)
Size / Dimension: 3.45mm x 3.45mm (within 0.05mm tolerance)
Height - Seated: 2.54mm maximum (acceptable within assembly clearance)

Regulatory Compliance:

RoHS Compliant status required
REACH Unaffected status preferred for CreeLED XLamp® XT-E series

All identified substitutes are CreeLED XLamp® XT-E series components in active production status, ensuring long-term availability and supply chain stability compared to the obsolete Samsung LH351Z.

Parameter Comparison

Parameter	SPHWHTL3D20CE3RTH3 (Main)	XTEAWT-00-0000-000000EE4	XTEAWT-00-0000-000000HE2	XTEAWT-00-0000-000000HF4	XTEAWT-00-0000-00000BGE1	XTEAWT-00-0000-00000BGE2	XTEAWT-00-0000-00000BHE1	XTEAWT-00-0000-00000BHF4	XTEAWT-00-0000-00000H8EA	XTEAWT-00-0000-00000HDE8	XTEAWT-00-0000-00000HDF8
Manufacturer	Samsung Semiconductor	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED	CreeLED
Series	LH351Z	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E	XLamp® XT-E
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Color / CCT	White, Cool / 5000K	White, Neutral / 4500K	White, Cool / 5700K	White, Neutral / 4750K	White, Cool / 6500K	White, Cool / 5700K	White, Cool / 6500K	White, Neutral / 4750K	White, Warm / 2200K	White, Warm / 2700K	White, Warm / 2850K
Voltage - Forward (Vf) Typ	2.9V	2.85V	2.85V	2.85V	2.85V	2.85V	2.85V	2.85V	2.85V	2.85V	2.85V
Current - Test	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA
Current - Max	1A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A
Flux @ 85°C, Current - Test	120lm (110-130lm)	118lm (114-122lm)	144lm (139-148lm)	144lm (139-148lm)	135lm (130-139lm)	135lm (130-139lm)	144lm (139-148lm)	144lm (139-148lm)	77lm (74-81lm)	111lm (107-114lm)	111lm (107-114lm)
Lumens/Watt @ Current - Test	118 lm/W	118 lm/W	144 lm/W	144 lm/W	135 lm/W	135 lm/W	144 lm/W	144 lm/W	77 lm/W	111 lm/W	111 lm/W
CRI (Color Rendering Index)	70	-	-	-	70	70	70	70	80	80	80
Viewing Angle	115°	115°	115°	115°	115°	115°	115°	115°	115°	115°	115°
Package / Case	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)	1414 (3535 Metric)
Size / Dimension	3.50mm x 3.50mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm	3.45mm x 3.45mm
Height - Seated (Max)	2.06mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm
Thermal Resistance of Package	7°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W	5°C/W
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
REACH Status	-	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitute for Cool White 5000K Applications:

XTEAWT-00-0000-000000HE2 (CreeLED XLamp® XT-E, Cool White 5700K) is the closest functional equivalent. This part maintains identical electrical specifications (2.85V Vf, 350mA test current) and mechanical compatibility (3535 package, 115° viewing angle, surface mount). The 5700K color temperature represents a 700K shift from the original 5000K specification but falls within acceptable cool white range for general lighting applications. This substitute delivers 144 lm/W efficiency compared to the original 118 lm/W, providing improved light output performance. Active production status ensures long-term availability.

Alternative Cool White Selection:

XTEAWT-00-0000-00000BGE1 (CreeLED XLamp® XT-E, Cool White 6500K) offers daylight-equivalent color temperature with 135 lm/W efficiency and CRI 70 matching the original specification. This part is suitable for applications requiring higher color temperature and enhanced color rendering.

Neutral White Alternative:

XTEAWT-00-0000-000000HF4 (CreeLED XLamp® XT-E, Neutral White 4750K) provides intermediate color temperature between warm and cool white, delivering 144 lm/W efficiency with CRI specification available upon request.

Warm White Options:

XTEAWT-00-0000-00000HDE8 (CreeLED XLamp® XT-E, Warm White 2700K) and XTEAWT-00-0000-00000HDF8 (Warm White 2850K) are available for applications requiring warm color temperature, both with CRI 80 for enhanced color quality.

Compliance and Supply Chain Considerations:

All recommended substitutes are CreeLED XLamp® XT-E series components with active production status, RoHS compliance, and REACH Unaffected certification. These parts feature improved thermal resistance (5°C/W versus 7°C/W) and higher maximum current ratings (1.5A versus 1A), providing enhanced reliability margins. Packaging format options include Tape & Reel (TR) and Cut Tape (CT) with Digi-Reel® availability, supporting both high-volume and low-volume procurement requirements.

Frequently Asked Questions (FAQ)

Q1: Can XTEAWT-00-0000-000000HE2 be used as a direct replacement for SPHWHTL3D20CE3RTH3 without circuit modifications?

A: Yes. Both components operate at 2.85V forward voltage (within 0.05V tolerance of the original 2.9V specification) and 350mA test current. The 3535 metric package, 115° viewing angle, and surface mount configuration are identical. PCB layout and reflow soldering parameters remain unchanged. The 5700K color temperature differs from the original 5000K, but both fall within cool white classification suitable for general lighting applications.

Q2: What is the impact of the 0.48mm height difference (2.54mm substitute versus 2.06mm original)?

A: The substitute components are 0.48mm taller. This difference must be evaluated against PCB assembly clearance requirements, including conformal coating thickness, underfill materials, and component-to-component spacing. For most standard PCB designs with 1.6mm board thickness and typical component heights, this increase is accommodated within standard assembly tolerances. Verify clearance in applications with height-constrained enclosures or dense component placement.

Q3: How does the improved thermal resistance (5°C/W versus 7°C/W) affect circuit design?

A: Lower thermal resistance indicates superior heat dissipation capability. The CreeLED XLamp® XT-E substitutes dissipate heat more efficiently than the original Samsung LH351Z, reducing junction temperature rise under identical operating conditions. This improvement enhances reliability and extends component lifespan. No circuit modifications are required; existing thermal management designs will perform equivalently or better with substitute parts.

Q4: Are there packaging format differences between substitute options?

A: Yes. XTEAWT-00-0000-00000BGE2 is available in Cut Tape (CT) & Digi-Reel® format with 1,000,000 piece inventory, suitable for high-volume production. Other substitutes are supplied in Tape & Reel (TR) format. Select packaging format based on procurement volume and assembly line requirements. Both formats are compatible with standard pick-and-place equipment.

Q5: What is the significance of CRI (Color Rendering Index) differences?

A: The original Samsung LH351Z specifies CRI 70. CreeLED substitutes XTEAWT-00-0000-00000BGE1, XTEAWT-00-0000-00000BGE2, XTEAWT-00-0000-00000BHE1, and XTEAWT-00-0000-00000BHF4 maintain CRI 70 specification. Warm white variants (XTEAWT-00-0000-00000H8EA, XTEAWT-00-0000-00000HDE8, XTEAWT-00-0000-00000HDF8) offer enhanced CRI 80, providing superior color accuracy for applications requiring high-fidelity color rendering. Select CRI specification based on application requirements.

Q6: How does the 3.45mm dimension (substitute) compare to the 3.50mm original specification?

A: The 0.05mm reduction in footprint dimension is within standard PCB manufacturing tolerances (±0.1mm typical). This minor difference does not affect PCB layout or component placement. Solder pad dimensions designed for 3535 metric packages accommodate both specifications without modification.

Q7: What is the maximum current rating difference, and does it affect circuit design?

A: The original Samsung LH351Z specifies 1A maximum current; CreeLED XLamp® XT-E substitutes support 1.5A maximum current. This 50% increase in maximum rating provides additional design margin and reliability headroom. Existing circuits designed for 350mA test current operation remain fully compatible. The higher maximum rating does not require circuit modifications and enhances component reliability under transient current conditions.

Q8: Are all substitute parts RoHS and REACH compliant?

A: Yes. All identified CreeLED XLamp® XT-E substitutes are RoHS Compliant and REACH Unaffected. These certifications ensure regulatory compliance for EU and international markets. The original Samsung LH351Z is also RoHS Compliant, maintaining equivalent environmental compliance status.

Q9: Which substitute offers the closest color temperature match to the original 5000K specification?

A: XTEAWT-00-0000-000000HE2 (5700K) provides the closest cool white match, with only 700K deviation from the original 5000K. For applications requiring exact 5000K specification, XTEAWT-00-0000-000000EE4 (4500K) and XTEAWT-00-0000-000000HF4 (4750K) offer neutral white alternatives within ±500K tolerance. Application-specific color temperature requirements should guide final selection.

Q10: What is the inventory status and lead time for substitute parts?

A: XTEAWT-00-0000-00000BGE2 has 1,000,000 pieces in stock, ensuring immediate availability for high-volume orders. Other substitutes maintain inventory levels between 694 and 1,171 pieces. All parts are in active production status with CreeLED, providing long-term supply chain stability compared to the obsolete Samsung LH351Z. Contact authorized distributors for current lead time and pricing information.

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