Bourns 9310-02 Fixed Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 9310-02 is a 220 nH unshielded drum core wirewound inductor rated for 1.9 A with a maximum DC resistance of 55 mOhm. This through-hole axial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring low inductance values with controlled impedance characteristics. The 9310-02 is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Inductance	220 nH
Inductance Tolerance	±20%
Current Rating	1.9 A
DC Resistance (Max)	55 mOhm
Q @ 25 MHz	50
Self Resonant Frequency	450 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package / Case	Axial
Physical Dimensions	0.156" Dia × 0.375" L (3.96 mm × 9.53 mm)
Shielding	Unshielded

Substitute Part Grouping Explanation

Substitution for the Bourns 9310-02 is determined by strict equivalence across the following electrical and mechanical parameters:

Inductance Value: 220 nH (exact match required)
Inductance Tolerance: ±20% (matching tolerance specification)
DC Resistance: 55 mOhm maximum (electrical performance equivalence)
Current Rating: Minimum 1.9 A (equal or higher acceptable)
Q Factor @ 25 MHz: 50 (frequency response characteristic)
Self Resonant Frequency: 450 MHz (high-frequency behavior)
Operating Temperature Range: Minimum -55°C to 105°C coverage
Mounting Type: Through Hole (assembly compatibility)
Package / Case: Axial (form factor compatibility)
Physical Dimensions: 0.156" Dia × 0.375" L (board layout compatibility)
Shielding: Unshielded (electromagnetic environment matching)

The API Delevan 1537-02M and 1537R-02M meet all electrical and mechanical substitution criteria, with the primary distinction being core material composition (phenolic vs. ferrite) and product status classification.

Parameter Comparison

Parameter	Bourns 9310-02	API Delevan 1537-02M	API Delevan 1537R-02M
Inductance	220 nH	220 nH	220 nH
Inductance Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.9 A	2.02 A	2.02 A
DC Resistance (Max)	55 mOhm	55 mOhm	55 mOhm
Q @ 25 MHz	50	50	50
Self Resonant Frequency	450 MHz	450 MHz	450 MHz
Operating Temperature Range	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial
Physical Dimensions	0.156" Dia × 0.375" L	0.156" Dia × 0.375" L	0.156" Dia × 0.375" L
Shielding	Unshielded	Unshielded	Unshielded
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

API Delevan 1537R-02M is the primary substitute for the Bourns 9310-02. This part maintains electrical equivalence across all critical parameters while offering active product status and ROHS3 compliance. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin beyond the original specification. Packaging in Tape & Reel format supports automated assembly processes.

API Delevan 1537-02M serves as a secondary substitute, providing identical electrical performance and active product status. This variant is also supplied in Tape & Reel packaging but carries non-compliant RoHS status. Selection between 1537-02M and 1537R-02M depends on regulatory and environmental compliance requirements for the end application.

Both API Delevan alternatives are electrically and mechanically compatible with the original Bourns 9310-02 design, with current ratings exceeding the minimum 1.9 A requirement and matching all frequency-dependent characteristics.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-02M or 1537R-02M be used as direct replacements for the Bourns 9310-02?

A: Yes. Both parts meet the electrical and mechanical substitution criteria. The 220 nH inductance, ±20% tolerance, 55 mOhm DC resistance, and identical physical dimensions ensure functional compatibility in the same circuit application and PCB layout.

Q: What is the difference between the 1537-02M and 1537R-02M?

A: The primary difference is RoHS compliance status. The 1537R-02M is ROHS3 compliant, while the 1537-02M is non-compliant. Both parts are electrically identical and share the same physical form factor. Selection depends on regulatory requirements for your application.

Q: Does the higher current rating of the API Delevan parts (2.02 A vs. 1.9 A) affect compatibility?

A: No. A higher current rating indicates greater thermal margin and is acceptable for direct substitution. The part can safely handle the original design current of 1.9 A with improved reliability characteristics.

Q: Are there any temperature range considerations when substituting?

A: The API Delevan alternatives support -55°C to 125°C operation, which exceeds the original -55°C to 105°C specification. This extended range provides additional design margin and is fully compatible with applications designed for the Bourns 9310-02.

Q: What is the significance of the core material difference (ferrite vs. phenolic)?

A: Both core materials achieve the specified electrical performance at 220 nH inductance with matching Q factor and self-resonant frequency. The phenolic core in the API Delevan parts is functionally equivalent for this application category.

Q: Are the packaging formats compatible with existing assembly equipment?

A: Both API Delevan substitutes are supplied in Tape & Reel format, which is standard for automated through-hole assembly processes. The axial package and physical dimensions match the original component, ensuring compatibility with existing pick-and-place and insertion equipment.

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