RL110-102K Equivalent & Substitute Parts

Part Overview

The RL110-102K is a 1 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 530 mA with a maximum DC resistance of 1.7 Ohm. This through-hole component features a radial, vertical cylinder configuration with 4 leads and operates across a temperature range of -30°C to 100°C. The part is currently obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	1 mH
Inductance Tolerance	±10%
Current Rating	530 mA
DC Resistance (Max)	1.7 Ohm
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Through Hole
Package Type	Radial, Vertical Cylinder, 4 Leads (Open)
Self Resonant Frequency	1.7 MHz
Inductance Test Frequency	1 kHz
Physical Diameter	0.394" (10.00 mm)
Physical Height	0.394" (10.00 mm)

Substitute Part Grouping Explanation

The RCH110NP-102K from Sumida America Components Inc. qualifies as a direct substitute for the RL110-102K based on the following critical parameters:

Electrical Equivalence:

Identical inductance value: 1 mH
Identical inductance tolerance: ±10%
Identical current rating: 530 mA
Identical DC resistance maximum: 1.7 Ohm
Identical core material: Ferrite
Identical shielding configuration: Unshielded
Identical self resonant frequency: 1.7 MHz
Identical inductance test frequency: 1 kHz

Mechanical Compatibility:

Identical mounting type: Through Hole
Identical package configuration: Radial, Vertical Cylinder, 4 Leads (Open)
Identical physical diameter: 0.394" (10.00 mm)
Height variation within acceptable tolerance: 0.413" (10.50 mm) vs. 0.394" (10.00 mm)

Parameter Comparison

Parameter	RL110-102K (Bourns)	RCH110NP-102K (Sumida)
Inductance	1 mH	1 mH
Inductance Tolerance	±10%	±10%
Current Rating (Amps)	530 mA	530 mA
DC Resistance (Max)	1.7 Ohm	1.7 Ohm
Core Material	Ferrite	Ferrite
Shielding	Unshielded	Unshielded
Self Resonant Frequency	1.7 MHz	1.7 MHz
Mounting Type	Through Hole	Through Hole
Package / Case	Radial, Vertical Cylinder, 4 Leads (Open)	Radial, Vertical Cylinder, 4 Leads (Open)
Physical Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)
Height - Seated (Max)	0.394" (10.00 mm)	0.413" (10.50 mm)
Operating Temperature Range	-30°C ~ 100°C	-40°C ~ 100°C
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The RCH110NP-102K is the qualified substitute for the obsolete RL110-102K. Selection should be based on the following factors:

Product Status: The RL110-102K is obsolete, while the RCH110NP-102K is active and maintains current production status with 8929 units in stock, ensuring long-term availability.

Regulatory Compliance: The RCH110NP-102K is ROHS3 compliant, whereas the RL110-102K is RoHS non-compliant. For applications subject to RoHS regulations, the substitute part meets current environmental standards.

Operating Temperature: The RCH110NP-102K extends the lower operating temperature limit to -40°C compared to the RL110-102K at -30°C, providing broader thermal operating range.

Physical Dimensions: The height difference of 0.019" (0.50 mm) between parts must be evaluated for PCB layout and mechanical clearance constraints in the target application.

Electrical Performance: All critical electrical parameters are identical, ensuring functional equivalence in circuit operation.

Frequently Asked Questions (FAQ)

Q: Can the RCH110NP-102K be used as a direct replacement for the RL110-102K?

A: Yes. The RCH110NP-102K meets all electrical specifications of the RL110-102K, including inductance value, current rating, DC resistance, and core material. The parts are mechanically compatible for through-hole mounting with identical lead configurations.

Q: What is the significance of the height difference between these parts?

A: The RCH110NP-102K has a maximum seated height of 0.413" (10.50 mm) compared to 0.394" (10.00 mm) for the RL110-102K. This 0.019" (0.50 mm) difference must be verified against PCB layout constraints, component spacing requirements, and enclosure clearances in the target application.

Q: Does the extended operating temperature range of the RCH110NP-102K affect compatibility?

A: No. The RCH110NP-102K's extended lower temperature limit of -40°C (versus -30°C for the RL110-102K) is a performance enhancement that does not compromise compatibility. Applications operating within the original -30°C to 100°C range will function identically.

Q: What is the impact of RoHS compliance differences?

A: The RL110-102K is RoHS non-compliant, while the RCH110NP-102K is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part satisfies environmental compliance mandates. For legacy systems without RoHS requirements, both parts are functionally equivalent.

Q: Are there packaging differences between these parts?

A: The RL110-102K is supplied in standard packaging, while the RCH110NP-102K is supplied in bulk packaging. This affects procurement and handling procedures but does not impact electrical or mechanical performance.

Q: How do the inductance tolerance specifications compare?

A: Both parts specify ±10% inductance tolerance at 1 kHz test frequency, ensuring identical circuit performance characteristics and design margin calculations.

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