LAL04KB821K Equivalent & Substitute Parts

Part Overview

The LAL04KB821K is a 820 µH unshielded axial inductor manufactured by Taiyo Yuden, rated for 105 mA continuous current with a maximum DC resistance of 10.5Ohm. This component operates across a temperature range of -25°C to 105°C and features a self-resonant frequency of 1.85 MHz. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

LAL04KB821K

Taiyo YudenIn Stock: 1048LAL04KB821K Datasheet

Current PartRFQ

8230-90-RC

Bourns Inc.In Stock: 23888230-90-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LAL04KB821K is based on matching the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 820 µH with ±10% tolerance
• Mounting configuration: Through hole axial package
• Shielding classification: Unshielded
• Operating temperature compatibility: Minimum -25°C to maximum 105°C overlap

Secondary Compatibility Factors:

• Current rating must support the application requirement
• DC resistance must be acceptable for the circuit design
• Self-resonant frequency must not interfere with intended operating frequency

The Bourns 8230-90-RC satisfies the primary matching criteria with identical inductance value and tolerance, through-hole axial mounting, and unshielded construction. However, the substitute part exhibits reduced current rating (40 mA versus 105 mA) and significantly higher DC resistance (65Ohm versus 10.5Ohm), which restricts its application scope to lower-current circuits.

Parameter Comparison

Engineering Selection Recommendations

For the LAL04KB821K (Taiyo Yuden): The original part is classified as obsolete, indicating discontinued manufacturing and limited future availability. Existing inventory of 994 pieces provides short-term supply for current production requirements.

For the 8230-90-RC (Bourns Inc.): This substitute part carries active product status with robust inventory availability (2292 pieces). The component is ROHS3 compliant and maintains REACH unaffected classification, aligning with current regulatory requirements. The extended operating temperature range (-55°C to 105°C) provides additional thermal margin compared to the original part.

Critical Substitution Constraints: The 8230-90-RC exhibits a current rating of 40 mA, which is 62% lower than the LAL04KB821K's 105 mA rating. The DC resistance is 65Ohm compared to 10.5Ohm in the original part, representing a 520% increase. These electrical differences restrict the substitute to applications with lower current demands and circuits where elevated DC resistance is acceptable. The higher self-resonant frequency (3.8 MHz versus 1.85 MHz) may provide improved high-frequency performance characteristics.

Selection of the 8230-90-RC is appropriate only when circuit current requirements do not exceed 40 mA and when the increased DC resistance does not compromise circuit performance or power dissipation specifications.

Frequently Asked Questions (FAQ)

Q: Can the 8230-90-RC directly replace the LAL04KB821K in all applications?

A: No. While both components share identical inductance values and axial through-hole packaging, the 8230-90-RC has a maximum current rating of 40 mA compared to the LAL04KB821K's 105 mA. Direct substitution is only valid for circuits operating at or below 40 mA. Additionally, the 65Ohm DC resistance of the substitute is significantly higher than the original 10.5Ohm specification, which may affect circuit performance in applications sensitive to inductor losses.

Q: What are the key electrical differences between these parts?

A: The primary differences are current rating (105 mA original versus 40 mA substitute), DC resistance (10.5Ohm original versus 65Ohm substitute), and self-resonant frequency (1.85 MHz original versus 3.8 MHz substitute). The substitute part also features an extended operating temperature range (-55°C to 105°C versus -25°C to 105°C).

Q: Are both parts available in the same physical package?

A: Both components use through-hole axial packaging. However, the physical dimensions differ: the LAL04KB821K measures 0.157" diameter by 0.386" length (4.00mm x 9.80mm), while the 8230-90-RC measures 0.120" diameter by 0.300" length (3.05mm x 7.62mm). The substitute part is physically smaller and may require PCB layout verification for mechanical fit.

Q: What is the product status difference, and why does it matter?

A: The LAL04KB821K is classified as obsolete, meaning Taiyo Yuden has discontinued production. The 8230-90-RC is active, indicating ongoing manufacturing and availability from Bourns Inc. For new designs or long-term production, the active substitute part provides supply chain continuity.

Q: Are there compliance or regulatory differences?

A: The 8230-90-RC is ROHS3 compliant, while the LAL04KB821K does not specify RoHS compliance. Both parts are REACH unaffected and carry EAR99 ECCN classification. For applications requiring RoHS compliance, the 8230-90-RC is the appropriate choice.

Q: How do the quality factors (Q) compare?

A: The LAL04KB821K exhibits a Q of 55 at 796 kHz, while the 8230-90-RC has a Q of 30 at 790 kHz. The original part demonstrates superior quality factor, indicating lower losses at the test frequency. This difference may be significant in high-frequency or precision applications.