Bourns 1140-180K Equivalent & Substitute Parts

Part Overview

The Bourns 1140-180K is an 18 µH unshielded drum core wirewound inductor rated for 27 A continuous current with 8 mOhm maximum DC resistance. This through-hole component is designed for radial, vertical cylinder mounting in applications requiring fixed inductance values with ferrite core construction.

The 1140-180K has reached obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for legacy systems and new designs requiring compatible specifications.

Substiute Parts

1140-180K

Bourns Inc.In Stock: 9511140-180K Datasheet

Current PartRFQ

1140-180K-RC

Bourns Inc.In Stock: 11011140-180K-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1140-180K must maintain electrical and mechanical compatibility within the following criteria:

Electrical Parameters (Critical for Substitution):

• Inductance value: 18 µH ±10%
• DC Resistance: 8 mOhm Max
• Core material: Ferrite
• Shielding configuration: Unshielded

Mechanical Parameters (Critical for Substitution):

• Mounting type: Through Hole
• Package / Case: Radial, Vertical Cylinder
• Physical dimensions: 1.500" Dia (38.10 mm), Height 1.030" (26.16 mm) Max
• Operating temperature range: -55°C ~ 105°C

Current Rating Consideration: The 1140-180K is rated for 27 A continuous current. Substitute parts may have different current ratings provided they meet or exceed the application's actual current requirements. Current rating differences do not disqualify substitution if the part meets all other electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The 1140-180K-RC is the direct substitute for the obsolete 1140-180K. Both parts share identical electrical specifications (18 µH inductance, 8 mOhm DCR) and mechanical form factors (radial, vertical cylinder, through-hole mounting, identical dimensions).

The primary difference is product status: the 1140-180K-RC is an active product with ROHS3 compliance, whereas the original 1140-180K is obsolete and RoHS non-compliant.

Current rating differs between the two parts: the 1140-180K is rated for 27 A, while the 1140-180K-RC is rated for 17.2 A. Selection between these parts depends on the application's actual current requirements. If the circuit requires continuous current exceeding 17.2 A, the 1140-180K-RC cannot be substituted. If the application operates at or below 17.2 A continuous current, the 1140-180K-RC provides a compliant, active alternative.

Frequently Asked Questions (FAQ)

Q: Can the 1140-180K-RC replace the 1140-180K in all applications?

A: The 1140-180K-RC is mechanically and electrically compatible with the 1140-180K for inductance value, DC resistance, core material, shielding, and mounting type. However, the current rating differs: 1140-180K-RC is rated for 17.2 A versus 27 A for the original. Substitution is valid only if your application's continuous current requirement does not exceed 17.2 A.

Q: What is the significance of the RoHS compliance difference?

A: The 1140-180K-RC is ROHS3 compliant, while the 1140-180K is RoHS non-compliant. For new designs or applications subject to RoHS regulations, the 1140-180K-RC is the appropriate choice. For legacy systems where RoHS compliance is not a requirement, either part meets the electrical specifications.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the 1140-180K and 1140-180K-RC have identical dimensions: 1.500" diameter (38.10 mm) and 1.030" maximum seated height (26.16 mm). They are pin-compatible and occupy the same PCB footprint.

Q: What does "Active" product status mean for the 1140-180K-RC?

A: Active product status indicates the 1140-180K-RC is currently manufactured and available from the supplier. The obsolete status of the 1140-180K means it is no longer in production. For new designs or replenishment of existing inventory, the 1140-180K-RC ensures long-term supply availability.

Q: Are there any frequency or temperature performance differences?

A: Both parts are tested at 1 kHz and operate across the same temperature range (-55°C ~ 105°C). No performance differences are specified in the provided parameters.