LAL04KB6R8K Equivalent & Substitute Parts

Part Overview

The LAL04KB6R8K is a 6.8 µH unshielded through-hole inductor manufactured by Taiyo Yuden, rated for 550 mA maximum current with a DC resistance of 480mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 105°C and is suitable for applications requiring fixed inductance values in axial package configurations.

Substiute Parts

LAL04KB6R8K

Taiyo YudenIn Stock: 769LAL04KB6R8K Datasheet

Current PartRFQ

1641R-682K

API Delevan Inc.In Stock: 16681641R-682K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LAL04KB6R8K is evaluated based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

• Inductance value: 6.8 µH (±10% tolerance acceptable)
• Inductance tolerance: ±10%
• Mounting type: Through Hole
• Package configuration: Axial

Secondary Compatibility Factors:

• Current rating must equal or exceed 550 mA
• DC resistance must not exceed 480mOhm
• Operating temperature range must encompass -25°C to 105°C
• Self-resonant frequency and Q factor provide performance context but do not restrict substitution eligibility

The substitute part 1641R-682K by API Delevan Inc. matches the primary inductance and package criteria. However, the current rating of 285 mA falls below the 550 mA requirement of the original part, and the DC resistance of 1.02Ohm exceeds the 480mOhm maximum specification. These differences indicate that while the inductance value is equivalent, the electrical performance characteristics differ significantly.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The 1641R-682K cannot serve as a direct functional substitute for the LAL04KB6R8K in applications requiring the full 550 mA current rating. The substitute part is rated for only 285 mA, representing a 48% reduction in current capacity. Additionally, the DC resistance of 1.02Ohm is approximately 2.1 times higher than the 480mOhm specification of the original part, which will result in increased power dissipation and heat generation in the circuit.

Compliance Status:

The 1641R-682K holds Active product status and is RoHS3 compliant, whereas the LAL04KB6R8K is classified as Obsolete. Both parts are REACH Unaffected and carry EAR99 ECCN classification. The substitute part's active status provides better long-term availability and supply chain support.

Application Context:

Selection between these parts depends on circuit requirements. If the application operates at currents below 285 mA and can tolerate the higher DC resistance, the 1641R-682K may be considered. If the full 550 mA current capacity and lower DC resistance are mandatory, alternative sources or design modifications are necessary.

Frequently Asked Questions (FAQ)

Q: Can the 1641R-682K replace the LAL04KB6R8K in all applications?

A: No. The 1641R-682K has a maximum current rating of 285 mA compared to the LAL04KB6R8K's 550 mA rating. Applications requiring the full 550 mA capacity cannot use this substitute without circuit redesign or parallel configurations.

Q: What is the impact of the higher DC resistance in the 1641R-682K?

A: The 1641R-682K exhibits 1.02Ohm DC resistance versus 480mOhm in the LAL04KB6R8K. This 2.1× increase will result in higher resistive losses, increased heat dissipation, and potential voltage drop across the inductor at rated current levels.

Q: Are the physical dimensions compatible?

A: Both parts use axial through-hole packages with similar dimensions. The LAL04KB6R8K measures 0.157" Dia × 0.386" L (4.00mm × 9.80mm), while the 1641R-682K measures 0.162" Dia × 0.410" L (4.11mm × 10.41mm). These minor differences are typically accommodated in standard PCB layouts.

Q: Does shielding affect substitution?

A: The LAL04KB6R8K is unshielded while the 1641R-682K is shielded. Shielding reduces electromagnetic interference emission and susceptibility. In noise-sensitive applications, the shielded substitute may provide performance benefits. In applications where shielding is not required, the difference is not a limiting factor.

Q: What is the operating temperature compatibility?

A: The LAL04KB6R8K operates from -25°C to 105°C, while the 1641R-682K operates from -55°C to 105°C. The substitute part has an extended lower temperature range, making it suitable for applications requiring operation below -25°C.

Q: Why is the LAL04KB6R8K classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Taiyo Yuden. The 1641R-682K, with Active status, represents a currently available alternative, though with different electrical specifications.

Q: Can both parts be used interchangeably in PCB designs?

A: Physical interchangeability is possible due to compatible axial through-hole packages. However, electrical interchangeability is limited by the current rating and DC resistance differences. Circuit validation is required before substitution.