Bourns 9210-78 Equivalent & Substitute Parts

Part Overview

The Bourns 9210-78 is a 110 µH unshielded molded inductor rated for 128 mA with a maximum DC resistance of 4.9Ohm, designed for through-hole axial mounting. This component operates across a temperature range of -55°C to 105°C and is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

9210-78

Bourns Inc.In Stock: 9579210-78 Datasheet

Current PartRFQ

1537-78J

API Delevan Inc.In Stock: 11611537-78J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 9210-78 is determined by the following critical parameters:

• Inductance Value: 110 µH (±5% tolerance)
• Current Rating: Minimum 128 mA
• DC Resistance: 4.9Ohm Max
• Operating Temperature: -55°C ~ 105°C
• Mounting Configuration: Through Hole Axial
• Physical Dimensions: 0.156" Dia x 0.375" L (3.96mm x 9.53mm)
• Frequency Characteristics: Q @ 790kHz and Self Resonant Frequency at 8.9MHz

The API Delevan 1537-78J meets all substitution criteria. While it features an iron core instead of ferrite and is packaged in Tape & Reel format, it maintains electrical equivalence across all critical parameters and exceeds the current rating requirement at 144 mA.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 1537-78J (1537 series) is the qualified substitute for the obsolete Bourns 9210-78 (9210 series). Selection is based on the following factors:

• Product Status: The 1537-78J maintains active product status, ensuring ongoing availability and supply chain continuity.
• Electrical Equivalence: All critical electrical parameters—inductance, tolerance, DC resistance, Q factor, and self-resonant frequency—are identical to the original part.
• Current Rating Enhancement: The substitute part provides a 12.5% increase in current rating (144 mA vs. 128 mA), offering improved thermal margin in applications operating near the original current limit.
• Compliance Alignment: Both parts share identical RoHS non-compliance, REACH unaffected, and ECCN/HTSUS classifications.
• Mechanical Compatibility: Identical axial through-hole package dimensions ensure direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-78J be used as a direct replacement for the Bourns 9210-78?

A: Yes. The 1537-78J meets all electrical and mechanical specifications of the 9210-78. Identical inductance, tolerance, DC resistance, frequency characteristics, operating temperature range, and physical dimensions enable direct substitution in through-hole axial applications.

Q: What is the difference between the ferrite core in the original part and the iron core in the substitute?

A: Core material differs between the two parts. Both materials support the specified electrical performance at the stated frequency and current ratings. The iron core in the 1537-78J does not affect compatibility with the original design specifications.

Q: Does the Tape & Reel packaging of the 1537-78J affect its use in through-hole applications?

A: No. Packaging format (Tape & Reel vs. bulk) is a supply and handling consideration only. The component itself is identical and functions identically when mounted in through-hole applications.

Q: Why is the current rating higher on the substitute part?

A: The API Delevan 1537-78J is rated for 144 mA compared to the original 128 mA. This represents a design characteristic of the substitute part and provides additional thermal margin without affecting compatibility or requiring design changes.

Q: Are there any compliance or certification differences between the two parts?

A: No. Both parts share identical RoHS non-compliance status, REACH unaffected classification, and ECCN/HTSUS codes. No additional compliance considerations apply to the substitution.