APTD1608ZGC Green LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The APTD1608ZGC is an active green LED indication component manufactured by Kingbright, designed for surface mount applications in the 0603 (1608 Metric) package format. This discrete LED operates at 3.3V forward voltage with a dominant wavelength of 525nm and delivers 1000mcd luminous intensity. The component is ROHS3 compliant and currently in active production status with 2300 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

APTD1608ZGC

KingbrightIn Stock: 2311APTD1608ZGC Datasheet

Current PartRFQ

QBLP601D-IG

QT Brightek (QTB)In Stock: 27266QBLP601D-IG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the APTD1608ZGC is determined by strict alignment with the following critical parameters:

Package Compatibility: The substitute part must use the 0603 (1608 Metric) surface mount package with identical mechanical dimensions (1.60mm L × 0.80mm W) and maximum height specifications to ensure PCB assembly compatibility without design modification.

Optical Characteristics: The substitute must emit green light within the visible spectrum. Dominant wavelength must fall within the green region (typically 500nm to 570nm). The lens must be colorless with clear transparency to maintain optical performance.

Electrical Parameters: Forward voltage (Vf) must be compatible with 3.3V nominal operation. Test current specification of 20mA establishes the baseline for luminous intensity ratings. Substitutes operating at similar voltage and current levels maintain circuit compatibility.

Regulatory Compliance: Both the main part and substitute must maintain ROHS3 compliance and REACH unaffected status to satisfy environmental and regulatory requirements for equivalent component selection.

Configuration: Standard LED configuration with round domed top lens style ensures functional equivalence in indication applications.

The QBLP601D-IG from QT Brightek qualifies as a substitute based on matching package format, green color specification, compatible forward voltage (3.2V), identical test current (20mA), and equivalent regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The APTD1608ZGC remains the specified component when Kingbright sourcing is required or when the 1000mcd luminous intensity is the design requirement.

Substitute Selection: The QBLP601D-IG qualifies as an equivalent substitute when supply constraints affect APTD1608ZGC availability. The substitute maintains identical package geometry, electrical test parameters, and regulatory compliance. The forward voltage differential of 0.1V (3.3V versus 3.2V) is within typical circuit tolerance margins for LED indication applications. The higher luminous intensity rating (2000mcd versus 1000mcd) of the substitute does not create incompatibility; it represents enhanced optical performance within the same package envelope.

Compliance Verification: Both components maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels, confirming regulatory equivalence for production and field deployment.

Inventory Consideration: The QBLP601D-IG maintains significantly higher inventory availability (27223 units) compared to the APTD1608ZGC (2300 units), supporting supply chain continuity when substitution is operationally justified.

Frequently Asked Questions (FAQ)

Q: Can the QBLP601D-IG be used as a direct replacement for the APTD1608ZGC in existing PCB designs?

A: Yes. Both components use identical 0603 (1608 Metric) package dimensions and surface mount configuration. No PCB layout modification is required. The 0.1V forward voltage difference (3.2V versus 3.3V) is within standard circuit tolerance for LED indication circuits.

Q: What is the significance of the 1000mcd versus 2000mcd luminous intensity difference?

A: The QBLP601D-IG delivers twice the luminous intensity at identical test current (20mA). This represents enhanced brightness performance. For applications where the original 1000mcd specification is sufficient, the higher intensity of the substitute does not create functional incompatibility. For applications requiring specific brightness levels, the substitute's higher output must be evaluated against circuit design constraints.

Q: Are there wavelength compatibility concerns between 525nm and 520nm dominant wavelengths?

A: No. Both wavelengths fall within the green spectrum and are visually indistinguishable in indication applications. The 5nm difference represents normal manufacturing variation within the green LED category and does not affect functional performance in standard indication circuits.

Q: Do both components meet the same environmental and regulatory requirements?

A: Yes. Both the APTD1608ZGC and QBLP601D-IG maintain ROHS3 compliance, REACH unaffected status, identical MSL 3 (168 Hours) moisture sensitivity levels, and matching ECCN and HTSUS classifications. Regulatory equivalence is confirmed.

Q: What is the maximum height difference impact between the two components?

A: The APTD1608ZGC has a maximum height of 1.10mm while the QBLP601D-IG measures 1.05mm maximum. This 0.05mm difference is within standard PCB assembly tolerances and does not affect component placement, solder reflow, or mechanical clearance in standard surface mount applications.

Q: Can the substitute be used in high-volume production without design re-qualification?

A: Component substitution decisions for production deployment depend on internal quality assurance and design verification procedures. The electrical, mechanical, and regulatory parameters provided confirm technical equivalence. Production implementation follows organizational change control and qualification protocols.