APED3528QBC/D-F01 Equivalent & Substitute Parts

Part Overview

The APED3528QBC/D-F01 is a blue LED indication component manufactured by Kingbright, designed for surface mount applications in discrete 3.3V circuits. This 3528 metric package LED operates at 465nm dominant wavelength with 400mcd brightness rating and features a clear, domed lens. The component is Active status and ROHS3 compliant, making it suitable for current production environments. Substitute parts are identified when inventory constraints, lead time requirements, or specific application parameters necessitate alternative sourcing while maintaining functional equivalence.

Key Parameters

Parameter	Value	Significance for Substitution
Color	Blue	Determines optical output; substitutes must match
Voltage - Forward (Vf) (Typ)	3.3V	Critical for circuit compatibility; substitutes must match
Current - Test	20mA	Operating current specification; substitutes must match
Mounting Type	Surface Mount	PCB assembly compatibility; substitutes must match
Wavelength - Dominant	465nm	Optical characteristic; minor variations acceptable within blue spectrum
Millicandela Rating	400mcd	Brightness specification; substitutes may vary within application tolerance
Package / Case	1411 (3528 Metric)	Physical footprint; substitutes with compatible 3528 packages acceptable
RoHS Status	ROHS3 Compliant	Regulatory requirement; substitutes must maintain compliance
Moisture Sensitivity Level (MSL)	3 (168 Hours)	Storage and handling requirement; substitutes must match or exceed

Substitute Part Grouping Explanation

Substitute parts for the APED3528QBC/D-F01 are identified based on strict parameter alignment within the following criteria:

Primary Matching Parameters:

Color: Blue
Forward Voltage (Vf): 3.3V nominal
Test Current: 20mA
Mounting Type: Surface Mount
RoHS3 Compliance: Required
MSL Rating: 3 or better

Secondary Compatibility Parameters:

Wavelength range: 460nm to 475nm (blue spectrum tolerance)
Package classification: 3528 metric footprint or equivalent 2-PLCC
Brightness: 300mcd minimum (functional indication requirement)

The SMLZN4BGTT86A from Rohm Semiconductor qualifies as a substitute based on matching primary parameters while operating within acceptable secondary parameter ranges for blue LED indication applications.

Parameter Comparison

Parameter	APED3528QBC/D-F01 (Kingbright)	SMLZN4BGTT86A (Rohm Semiconductor)	Compatibility Status
Color	Blue	Blue	Match
Voltage - Forward (Vf) (Typ)	3.3V	3.3V	Match
Current - Test	20mA	20mA	Match
Mounting Type	Surface Mount	Surface Mount	Match
Wavelength - Dominant	465nm	470nm	Compatible (within blue spectrum)
Millicandela Rating	400mcd	300mcd	Substitute lower; acceptable for indication
Lens Style	Round with Domed Top	Round with Flat Top	Different; verify viewing angle requirements
Lens Size	2.60mm Dia	2.40mm Dia	Minor variation; functionally compatible
Package / Case	1411 (3528 Metric)	2-PLCC (3528 Supplier Package)	Compatible 3528 footprint
Height (Max)	3.20mm	2.05mm	Substitute lower profile
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
MSL Rating	3 (168 Hours)	3 (168 Hours)	Match

Engineering Selection Recommendations

Primary Part Selection (APED3528QBC/D-F01): Select the primary part when design specifications explicitly require 400mcd brightness, 465nm wavelength precision, or domed lens optical characteristics. This part maintains Active product status with established supply chain availability (672 pcs in stock).

Substitute Part Selection (SMLZN4BGTT86A): The SMLZN4BGTT86A substitutes when:

Circuit design tolerates 300mcd brightness (75% of primary specification)
Application accepts 470nm wavelength (within blue indication spectrum)
PCB layout accommodates 2.05mm maximum height (lower profile than primary)
Flat-top lens optical characteristics meet application requirements

Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and handling compatibility. The substitute part offers higher inventory availability (15,400 pcs) and lower profile form factor, beneficial for space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can SMLZN4BGTT86A directly replace APED3528QBC/D-F01 in existing PCB designs?

A: Yes, for circuit-level compatibility. Both parts share identical 3.3V forward voltage and 20mA test current specifications. PCB footprint compatibility requires verification: the primary part uses 1411 (3528 Metric) package while the substitute uses 2-PLCC (3528 Supplier Package). Both are 3528 metric footprint classifications suitable for standard 3528 pads. Height difference (3.20mm vs 2.05mm) may affect solder reflow profiles and clearance to adjacent components.

Q: What is the brightness difference between these parts?

A: The primary part (APED3528QBC/D-F01) provides 400mcd while the substitute (SMLZN4BGTT86A) provides 300mcd. For indication applications (status LEDs, signal lights), 300mcd remains adequate. Applications requiring maximum brightness or long-distance visibility should retain the primary part.

Q: Are there wavelength compatibility concerns?

A: Both parts operate in the blue spectrum (465nm primary vs 470nm substitute). This 5nm difference is imperceptible to human vision and acceptable for indication applications. Precision color-matching applications should retain the primary part.

Q: How do lens style differences affect performance?

A: The primary part features a domed top lens while the substitute has a flat top. Domed lenses provide wider viewing angles and better light diffusion. Flat-top lenses concentrate light more directly. Verify application viewing angle requirements (primary part: 40°; substitute: not specified) before substitution.

Q: Are both parts suitable for high-moisture environments?

A: Both parts carry MSL 3 rating (168 hours), indicating identical moisture sensitivity. Storage and handling procedures must follow MSL 3 requirements regardless of part selection.

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