Bourns 9310-10 Equivalent & Substitute Parts

Part Overview

The Bourns 9310-10 is a fixed inductor featuring 820 nH inductance with 900 mA current rating and 220mOhm maximum DC resistance. This through-hole axial component utilizes a drum core wirewound design with ferrite material. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Inductance	820 nH
Tolerance	±10%
Current Rating	900 mA
DC Resistance (Max)	220mOhm
Q @ Frequency	50 @ 25MHz
Self Resonant Frequency	220MHz
Operating Temperature Range	-55°C ~ 105°C
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.156" Dia x 0.375" L (3.96mm x 9.53mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: inductance value (820 nH), tolerance (±10%), DC resistance (220mOhm maximum), Q factor (50 @ 25MHz), self-resonant frequency (220MHz), current rating capability, operating temperature range, mounting type (through hole), and physical package dimensions (axial, 0.156" Dia x 0.375" L).

All identified substitute parts from API Delevan Inc. meet these core electrical specifications. The primary distinction between the main part and substitutes is the core material composition (ferrite versus phenolic) and product status (obsolete versus active). Physical dimensions and electrical performance parameters remain identical across all candidates.

Parameter Comparison

Parameter	Bourns 9310-10	API Delevan 1537-10K	API Delevan ER1537-10KM	API Delevan ER1537-10KP	API Delevan ER1537-10KR
Inductance	820 nH	820 nH	820 nH	820 nH	820 nH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating	900 mA	1.02 A	900 mA	900 mA	900 mA
DC Resistance (Max)	220mOhm	220mOhm	220mOhm	220mOhm	220mOhm
Q @ 25MHz	50	50	50	50	50
Self Resonant Frequency	220MHz	220MHz	220MHz	220MHz	220MHz
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	Axial	Axial	Axial	Axial	Axial
Physical Dimensions	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L
Product Status	Obsolete	Active	Active	Active	Active
Core Material	Ferrite	Phenolic	Phenolic	Phenolic	Phenolic

Engineering Selection Recommendations

All four API Delevan substitute parts maintain full electrical and mechanical compatibility with the Bourns 9310-10 across specified operating parameters. Selection among these alternatives should prioritize active product status and supply chain availability.

The API Delevan 1537-10K offers extended operating temperature range (-55°C ~ 125°C) and higher current rating (1.02 A) compared to the original specification, providing additional design margin for applications requiring thermal headroom.

The ER1537 series variants (ER1537-10KM, ER1537-10KP, ER1537-10KR) provide exact electrical and thermal matching to the original 9310-10 specification (-55°C ~ 105°C, 900 mA rating) while maintaining active product status. These parts differ only in packaging configuration and internal construction methodology.

All substitute candidates carry identical RoHS non-compliance status, REACH unaffected classification, and EAR99 export control designation as the original part.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-10K be used as a direct replacement for the Bourns 9310-10?

A: Yes. The 1537-10K maintains identical inductance (820 nH), tolerance (±10%), DC resistance (220mOhm), Q factor (50 @ 25MHz), self-resonant frequency (220MHz), and physical dimensions (0.156" Dia x 0.375" L axial). The higher current rating (1.02 A versus 900 mA) and extended temperature range (-55°C ~ 125°C versus -55°C ~ 105°C) represent design improvements that do not compromise compatibility.

Q: What is the difference between the ER1537 series parts?

A: The ER1537-10KM, ER1537-10KP, and ER1537-10KR variants are electrically and thermally identical. All three maintain 820 nH inductance, 900 mA current rating, 220mOhm DC resistance, and -55°C ~ 105°C operating range. Differences exist only in packaging configuration and internal construction methodology, not in electrical performance or physical footprint.

Q: Are the substitute parts physically compatible with existing PCB layouts?

A: Yes. All substitute parts maintain identical axial package dimensions of 0.156" diameter by 0.375" length (3.96mm x 9.53mm). Through-hole mounting compatibility is preserved across all candidates.

Q: What is the significance of core material differences between ferrite and phenolic?

A: The original Bourns 9310-10 uses ferrite core material, while API Delevan substitutes employ phenolic core construction. Both materials achieve the specified electrical parameters (inductance, Q factor, self-resonant frequency) within the defined tolerance. Core material selection affects internal construction methodology but does not alter the electrical performance specifications provided in this reference.

Q: Why is the Bourns 9310-10 classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The identified API Delevan alternatives maintain full electrical and mechanical equivalence while offering active product status and ongoing supply availability.

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