LAL04KB1R2M Equivalent & Substitute Parts

Part Overview

The LAL04KB1R2M is a 1.2 µH unshielded axial inductor manufactured by Taiyo Yuden, rated for 880 mA continuous current with a maximum DC resistance of 210 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The through-hole axial package and specific electrical characteristics define the substitution criteria for this inductor category.

Key Parameters

Parameter	Value
Inductance	1.2 µH
Inductance Tolerance	±20%
Current Rating	880 mA
DC Resistance (DCR)	210 mOhm Max
Shielding	Unshielded
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature Range	-25°C ~ 105°C
Self Resonant Frequency	144 MHz
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LAL04KB1R2M is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 1.2 µH (core functional requirement)
Mounting type: Through hole axial configuration
Shielding classification: Unshielded
Current rating: Minimum 825 mA (substitute must support primary application current demands)
DC resistance: Maximum 210 mOhm (electrical performance constraint)
Operating temperature range: Minimum -25°C ~ 105°C coverage
Package form factor: Axial through-hole compatibility

The substitute part 8230-22-RC from Bourns Inc. meets these criteria with matching inductance, through-hole axial mounting, unshielded construction, and compatible current and resistance specifications within acceptable engineering tolerances.

Parameter Comparison

Parameter	LAL04KB1R2M (Taiyo Yuden)	8230-22-RC (Bourns Inc.)	Compatibility
Inductance	1.2 µH	1.2 µH	Matched
Inductance Tolerance	±20%	±10%	Substitute tighter
Current Rating (Amps)	880 mA	825 mA	Substitute lower by 55 mA
DC Resistance (DCR)	210 mOhm Max	180 mOhm Max	Substitute lower
Shielding	Unshielded	Unshielded	Matched
Mounting Type	Through Hole	Through Hole	Matched
Package / Case	Axial	Axial	Matched
Operating Temperature Range	-25°C ~ 105°C	-55°C ~ 105°C	Substitute wider
Self Resonant Frequency	144 MHz	150 MHz	Substitute higher
Q @ Frequency	50 @ 7.96 MHz	25 @ 7.9 MHz	Original higher
Product Status	Obsolete	Active	Substitute active

Engineering Selection Recommendations

Primary Substitute: 8230-22-RC (Bourns Inc.)

The 8230-22-RC is the qualified substitute for the obsolete LAL04KB1R2M based on the following factors:

Electrical Equivalence: Identical 1.2 µH inductance value with tighter tolerance (±10% vs ±20%), lower DC resistance (180 mOhm vs 210 mOhm), and superior self-resonant frequency (150 MHz vs 144 MHz).
Current Rating Consideration: The substitute is rated for 825 mA versus the original 880 mA. Applications operating at or below 825 mA continuous current are fully compatible. Applications requiring the full 880 mA rating must be evaluated against the 55 mA reduction.
Thermal Performance: The substitute provides extended operating temperature range (-55°C ~ 105°C vs -25°C ~ 105°C), offering improved low-temperature performance.
Compliance Status: The 8230-22-RC is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain continuity.
Physical Form Factor: Both components maintain identical through-hole axial mounting and unshielded construction, enabling direct mechanical substitution in PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the 8230-22-RC directly replace the LAL04KB1R2M in all applications?

A: Direct substitution is valid for applications operating at 825 mA or below. Applications requiring the full 880 mA rating of the original part must evaluate whether the 55 mA reduction in current capacity affects circuit performance. All other electrical and mechanical parameters support direct substitution.

Q: What is the significance of the tighter tolerance on the substitute part?

A: The 8230-22-RC features ±10% inductance tolerance compared to the original ±20%. This tighter tolerance provides improved consistency and may enhance circuit performance in applications sensitive to inductance variation. This represents an improvement over the original specification.

Q: Are there physical size differences between these components?

A: Yes. The LAL04KB1R2M measures 0.157" Dia x 0.386" L (4.00mm x 9.80mm), while the 8230-22-RC measures 0.120" Dia x 0.300" L (3.05mm x 7.62mm). The substitute is physically smaller. PCB layout verification is required to confirm fit within existing footprints, though the smaller size typically presents no compatibility issues.

Q: What is the impact of the lower Q factor on the substitute part?

A: The original part exhibits Q of 50 @ 7.96 MHz, while the substitute shows Q of 25 @ 7.9 MHz. The lower Q factor indicates higher losses in the substitute. Applications sensitive to inductor losses or operating near the test frequency should evaluate this parameter against circuit requirements.

Q: Is the extended temperature range of the substitute beneficial?

A: The 8230-22-RC operates from -55°C ~ 105°C versus the original -25°C ~ 105°C. This extended low-temperature capability provides additional margin for applications in cold environments or with stringent thermal specifications. For standard operating ranges, this represents an enhancement.

Q: What compliance certifications apply to the substitute part?

A: The 8230-22-RC is ROHS3 compliant and REACH unaffected. Both components carry EAR99 ECCN classification. The substitute's active product status ensures regulatory compliance and ongoing manufacturer support.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message