78F220J Equivalent & Substitute Parts

Part Overview

The Bourns 78F220J is a 22 µH unshielded drum core wirewound inductor rated for 140 mA with a maximum DC resistance of 1.2Ω. This through-hole axial component operates across -55°C to 105°C and features a ferrite core with ±5% inductance tolerance. The 78F220J is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity.

Substiute Parts

78F220J

Bourns Inc.In Stock: 103778F220J Datasheet

Current PartRFQ

78F220J-RC

Bourns Inc.In Stock: 1515578F220J-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 78F220J-RC qualifies as a direct substitute based on the following matching parameters:

• Inductance: 22 µH (identical)
• DC Resistance: 1.2Ω Max (identical)
• Core Material: Ferrite (identical)
• Shielding: Unshielded (identical)
• Mounting Type: Through Hole (identical)
• Package: Axial (identical)
• Operating Temperature: -55°C to 105°C (identical)
• Tolerance: ±5% (identical)
• Physical Dimensions: 0.110" Dia × 0.280" L (identical)

The primary difference is the current rating: the 78F220J-RC supports 285 mA compared to the original 140 mA specification. This represents an increase in current capacity while maintaining all other electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 78F220J-RC is the appropriate substitute for the obsolete 78F220J. Both components share identical inductance, DC resistance, core material, shielding, mounting configuration, and physical dimensions. The 78F220J-RC provides enhanced current capacity (285 mA versus 140 mA), which is compatible with applications originally designed for the 78F220J.

The 78F220J-RC holds active product status and meets ROHS3 compliance requirements, whereas the original 78F220J is obsolete and non-compliant. For new designs and production continuity, the 78F220J-RC is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can the 78F220J-RC replace the 78F220J in existing designs?

A: Yes. The 78F220J-RC maintains identical inductance (22 µH), DC resistance (1.2Ω), core material (ferrite), shielding (unshielded), mounting type (through hole), package style (axial), and physical dimensions. The increased current rating (285 mA) does not compromise compatibility with circuits designed for 140 mA operation.

Q: What is the primary difference between these two parts?

A: The 78F220J-RC supports a higher current rating of 285 mA compared to the 78F220J's 140 mA specification. All other electrical and mechanical parameters remain identical.

Q: Why is the 78F220J obsolete?

A: The 78F220J has been discontinued by Bourns Inc. The 78F220J-RC represents the active product line continuation within the 78F series.

Q: Are there packaging differences between these parts?

A: No. Both components use identical axial through-hole packaging with the same physical dimensions (0.110" Dia × 0.280" L).

Q: Does the 78F220J-RC meet modern compliance standards?

A: Yes. The 78F220J-RC is ROHS3 compliant, whereas the original 78F220J is non-compliant. For applications requiring regulatory compliance, the 78F220J-RC is the appropriate choice.

Q: Are the electrical characteristics identical?

A: Yes, with the exception of current rating. Both parts share identical inductance tolerance (±5%), Q factor (50 @ 2.5MHz), self-resonant frequency (13MHz), and operating temperature range (-55°C to 105°C).