RL187-151J-RC Equivalent & Substitute Parts

Part Overview

The RL187-151J-RC is a 150 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 200 mA with a maximum DC resistance of 2Ohm. This component is designed for through-hole mounting in radial, vertical cylinder configuration. The part is currently obsolete, making identification of equivalent substitutes essential for ongoing production support and legacy system maintenance.

Key Parameters

Parameter	Value
Inductance	150 µH
Tolerance	±5%
Current Rating	200 mA
DC Resistance (Max)	2Ohm
Core Type	Ferrite, Unshielded
Mounting Type	Through Hole
Package / Case	Radial, Vertical Cylinder
Operating Temperature Range	-55°C ~ 105°C
Self Resonant Frequency	3.8 MHz

Substitute Part Grouping Explanation

Substitution eligibility for the RL187-151J-RC is determined by strict equivalence across the following critical parameters:

Inductance value: 150 µH with ±5% tolerance
Current rating: 200 mA minimum
DC resistance: 2Ohm maximum
Core material and shielding: Ferrite, unshielded
Mounting configuration: Through-hole, radial vertical cylinder
Self-resonant frequency: 3.8 MHz
Inductance test frequency: 796 kHz

The AIUR-04-151J from Abracon LLC meets these core electrical specifications and physical form factor requirements, qualifying it as a direct substitute for the obsolete RL187-151J-RC.

Parameter Comparison

Parameter	RL187-151J-RC (Bourns)	AIUR-04-151J (Abracon)
Inductance	150 µH	150 µH
Tolerance	±5%	±5%
Current Rating (Amps)	200 mA	200 mA
DC Resistance (Max)	2Ohm	2Ohm
Core Type	Ferrite, Unshielded	Ferrite, Unshielded
Shielding	Unshielded	Unshielded
Q @ 796kHz	80	30
Self Resonant Frequency	3.8 MHz	3.8 MHz
Mounting Type	Through Hole	Through Hole
Package / Case	Radial, Vertical Cylinder	Radial, Vertical Cylinder
Size / Dimension (Dia)	0.315" (8.00mm)	0.335" (8.50mm)
Height - Seated (Max)	0.441" (11.20mm)	0.441" (11.20mm)
Operating Temperature Range	-55°C ~ 105°C	-25°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The AIUR-04-151J qualifies as a functional equivalent to the RL187-151J-RC based on matching electrical specifications and physical form factor. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Key considerations for selection:

The AIUR-04-151J is currently in active production status with confirmed inventory availability (962 pcs), whereas the RL187-151J-RC is obsolete. The substitute maintains identical inductance, tolerance, current rating, and DC resistance specifications.

Operating temperature range differs: the RL187-151J-RC operates from -55°C to 105°C, while the AIUR-04-151J operates from -25°C to 85°C. Applications requiring the full -55°C lower temperature limit must evaluate thermal requirements against the substitute's reduced range.

The Q factor at 796 kHz differs (80 vs. 30), reflecting different core material characteristics. Applications sensitive to frequency response or damping characteristics should assess this parameter against circuit requirements.

Physical dimensions show minor variation: the AIUR-04-151J has a slightly larger diameter (0.335" vs. 0.315") while maintaining identical height. PCB layout and mechanical clearance must be verified.

Frequently Asked Questions (FAQ)

Q: Can the AIUR-04-151J directly replace the RL187-151J-RC in existing designs?

A: The AIUR-04-151J meets the core electrical specifications (150 µH, 200 mA, 2Ohm DCR) and physical mounting requirements. However, verify operating temperature range requirements and Q factor performance for your specific application. The slightly larger diameter (0.335" vs. 0.315") requires PCB layout confirmation.

Q: What is the significance of the Q factor difference (80 vs. 30)?

A: Q factor indicates the quality of the inductor at a specific frequency (796 kHz). The RL187-151J-RC has higher Q, meaning lower losses at that frequency. Applications with strict frequency response or efficiency requirements should evaluate whether the lower Q of the AIUR-04-151J affects circuit performance.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the RL187-151J-RC and AIUR-04-151J are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the impact of the operating temperature range difference?

A: The RL187-151J-RC operates from -55°C to 105°C, while the AIUR-04-151J operates from -25°C to 85°C. If your application requires operation below -25°C or above 85°C, the AIUR-04-151J is not suitable. Verify your system's thermal requirements before substitution.

Q: Does the physical size difference affect PCB compatibility?

A: The AIUR-04-151J has a diameter of 0.335" compared to 0.315" for the RL187-151J-RC, while both share the same 0.441" height. Confirm that PCB pad spacing and mechanical clearances accommodate the slightly larger diameter before implementation.

Q: What packaging options are available?

A: The RL187-151J-RC is supplied in standard packaging. The AIUR-04-151J is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

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