Bourns 9310-22 Fixed Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 9310-22 is a 2.7 µH unshielded drum core wirewound inductor rated for 385 mA with a maximum DC resistance of 1.2 Ohm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors. The 9310-22 is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives from API Delevan Inc. provide functional equivalence with extended temperature ranges and improved availability.

Key Parameters

Parameter	Value
Inductance	2.7 µH
Tolerance	±10%
Current Rating	385 mA
DC Resistance (Max)	1.2 Ohm
Q @ Frequency	33 @ 7.9 MHz
Self Resonant Frequency	120 MHz
Operating Temperature Range	-55°C ~ 105°C
Mounting Type	Through Hole
Package / Case	Axial
Physical Dimensions	0.156" Dia x 0.375" L (3.96mm x 9.53mm)

Substitute Part Grouping Explanation

Substitution of the Bourns 9310-22 is based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Inductance value: 2.7 µH ±10%
DC resistance: 1.2 Ohm maximum
Current rating: 385 mA minimum
Q factor: 33 @ 7.9 MHz
Self resonant frequency: 120 MHz
Operating temperature: -55°C minimum to 105°C maximum
Mounting type: Through hole axial
Physical dimensions: 0.156" Dia x 0.375" L

Substitute Part Categories:

The API Delevan ER1537 series (ER1537-22KR, ER1537-22KM, ER1537-22KP) and 1537-22K provide direct electrical equivalence. These molded inductors maintain identical inductance, tolerance, DC resistance, Q factor, and self resonant frequency specifications. All substitute parts are packaged in tape and reel format and feature active product status with extended temperature ratings to 125°C, providing superior thermal performance compared to the obsolete Bourns part.

Parameter Comparison

Parameter	Bourns 9310-22	API Delevan 1537-22K	API Delevan ER1537-22KR	API Delevan ER1537-22KM	API Delevan ER1537-22KP
Inductance	2.7 µH	2.7 µH	2.7 µH	2.7 µH	2.7 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (mA)	385	430	385	385	385
DC Resistance (Max)	1.2 Ohm	1.2 Ohm	1.2 Ohm	1.2 Ohm	1.2 Ohm
Q @ 7.9 MHz	33	33	33	33	33
Self Resonant Frequency	120 MHz	120 MHz	120 MHz	120 MHz	120 MHz
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 / Case	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

Engineering Selection Recommendations

Primary Selection: API Delevan ER1537-22KR, ER1537-22KM, or ER1537-22KP

These three variants provide direct electrical and mechanical equivalence to the Bourns 9310-22 with identical current ratings of 385 mA. All three maintain active product status, ensuring long-term availability and supply chain stability. The extended operating temperature range to 125°C provides additional thermal margin beyond the original specification. These parts are available in tape and reel packaging suitable for automated assembly processes.

Secondary Selection: API Delevan 1537-22K

The 1537-22K offers a higher current rating of 430 mA while maintaining all other electrical parameters. This variant is suitable for applications where additional current headroom is beneficial. The extended temperature range to 125°C and active product status make this an acceptable alternative. Tape and reel packaging supports high-volume production environments.

Compliance Considerations:

All substitute parts maintain RoHS non-compliant status consistent with the original Bourns 9310-22. REACH status is unaffected for all variants. ECCN classification remains EAR99 and HTSUS code 8504.50.8000 across all parts, ensuring consistent regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan ER1537-22KR directly replace the Bourns 9310-22 in existing designs?

A: Yes. The ER1537-22KR maintains identical inductance (2.7 µH), tolerance (±10%), current rating (385 mA), DC resistance (1.2 Ohm max), Q factor (33 @ 7.9 MHz), self resonant frequency (120 MHz), and physical dimensions (0.156" Dia x 0.375" L). Through-hole axial mounting is identical. The extended operating temperature range to 125°C provides additional performance margin.

Q: What is the difference between the ER1537-22KR, ER1537-22KM, and ER1537-22KP variants?

A: These three API Delevan parts are electrically and mechanically identical. All three provide 2.7 µH inductance, 385 mA current rating, and 1.2 Ohm maximum DC resistance. The designations (R, M, P) represent different packaging or distribution variants but do not affect electrical performance or physical form factor.

Q: Why is the API Delevan 1537-22K rated for 430 mA instead of 385 mA?

A: The 1537-22K uses a molded construction that allows higher current capacity while maintaining the same inductance, DC resistance, and other electrical parameters. This higher rating provides additional design margin for applications operating near the current limit.

Q: Are all substitute parts available in the same packaging format?

A: The Bourns 9310-22 is supplied in standard through-hole format. All API Delevan substitutes (1537-22K, ER1537-22KR, ER1537-22KM, ER1537-22KP) are packaged in tape and reel format suitable for automated assembly. Physical dimensions and axial mounting remain identical.

Q: What is the temperature performance difference between the Bourns 9310-22 and substitute parts?

A: The Bourns 9310-22 operates from -55°C to 105°C. The API Delevan 1537-22K extends the upper limit to 125°C. The ER1537 series variants (ER1537-22KR, ER1537-22KM, ER1537-22KP) maintain the -55°C to 105°C range matching the original specification. All parts maintain identical electrical performance across their respective operating ranges.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: No. All parts maintain RoHS non-compliant status, REACH unaffected classification, EAR99 ECCN designation, and 8504.50.8000 HTSUS code. Regulatory treatment is consistent across all variants.

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