1210-103J Fixed Inductor Equivalent & Substitute Parts

Part Overview

The 1210-103J is a fixed surface mount inductor manufactured by API Delevan Inc., rated at 10 µH inductance with a maximum current rating of 297 mA and DC resistance of 2.1 Ohm. This unshielded ferrite core inductor operates across the temperature range of -55°C to 125°C and is packaged in the 1210 (3225 Metric) form factor. The part is currently active in production with 853 pieces available in new original stock.

Equivalent and substitute parts are identified when design requirements permit component interchange based on matching electrical specifications, mechanical compatibility, and environmental ratings. Substitutes become necessary when primary part availability is limited, supply chain constraints occur, or design flexibility allows for alternative manufacturers meeting identical or superior performance criteria.

Key Parameters

Parameter	Specification
Inductance	10 µH
Inductance Tolerance	±5%
Current Rating	297 mA
DC Resistance (DCR)	2.1 Ohm Max
Core Material	Ferrite
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Q @ Frequency	30 @ 7.9 MHz
Self Resonant Frequency	30 MHz
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 1210-103J is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 10 µH ±5%
DC Resistance: 2.1 Ohm maximum
Core material: Ferrite
Shielding configuration: Unshielded
Package form factor: 1210 (3225 Metric) or mechanically equivalent
Mounting type: Surface Mount
Operating temperature range: Minimum -55°C to 125°C coverage

Secondary Compatibility Factors:

Current rating: Equal to or greater than 297 mA
Moisture sensitivity level: MSL 1 or MSL 3 acceptable for most applications
RoHS and REACH compliance status

Parts are classified as direct equivalents when all primary matching criteria are satisfied. Parts are classified as similar substitutes when inductance, DCR, and core material match but secondary parameters such as current rating, package designation, or frequency characteristics differ within acceptable engineering tolerances.

Parameter Comparison

Parameter	1210-103J (Main Part)	1210R-103J (Direct Equivalent)	CM322522-100JL (Similar Substitute)
Manufacturer	API Delevan Inc.	API Delevan Inc.	Bourns Inc.
Inductance	10 µH	10 µH	10 µH
Inductance Tolerance	±5%	±5%	±5%
Current Rating (Amps)	297 mA	297 mA	140 mA
DC Resistance (DCR)	2.1 Ohm Max	2.1 Ohm Max	2.1 Ohm Max
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded
Q @ Frequency	30 @ 7.9 MHz	30 @ 7.9 MHz	30 @ 2.52 MHz
Self Resonant Frequency	30 MHz	30 MHz	36 MHz
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	Nonstandard
Size / Dimension	0.128" L x 0.095" W (3.25mm x 2.42mm)	0.128" L x 0.095" W (3.25mm x 2.42mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.101" (2.57mm)	0.101" (2.57mm)	0.087" (2.20mm)
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Inventory (Pcs)	853	12347	11983

Engineering Selection Recommendations

1210R-103J (Direct Equivalent - Recommended Primary Substitute)

The 1210R-103J is a direct electrical and mechanical equivalent to the 1210-103J. Both parts share identical inductance (10 µH), current rating (297 mA), DC resistance (2.1 Ohm maximum), package dimensions (1210 / 3225 Metric), and operating temperature range (-55°C to 125°C). The 1210R-103J is manufactured by the same supplier (API Delevan Inc.) and maintains the same series designation with enhanced RoHS3 compliance. Inventory availability is significantly higher at 12,347 pieces compared to 853 pieces for the main part. This substitute is suitable for direct replacement in all applications where the 1210-103J is specified.

CM322522-100JL (Similar Substitute - Conditional Application)

The CM322522-100JL manufactured by Bourns Inc. matches the core electrical specifications of inductance (10 µH), DC resistance (2.1 Ohm maximum), and ferrite core material. However, this part exhibits a reduced current rating of 140 mA compared to the 297 mA rating of the main part. The CM322522-100JL is suitable only for applications where the circuit current requirement does not exceed 140 mA. The part features a nonstandard package designation with slightly different physical dimensions (0.126" L x 0.098" W versus 0.128" L x 0.095" W) and reduced height (0.087" versus 0.101"), which may require PCB layout verification. Operating temperature range is -40°C to 125°C, which does not extend to the -55°C minimum of the main part. Moisture sensitivity level is MSL 3 (168 hours) versus MSL 1 for the main part. This substitute is RoHS3 compliant and offers high inventory availability (11,983 pieces).

Compliance Considerations

The 1210-103J is RoHS non-compliant. Both substitute parts (1210R-103J and CM322522-100JL) are ROHS3 compliant, providing regulatory advantage for new designs or applications requiring RoHS certification. All three parts are REACH unaffected and carry EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can the 1210R-103J be used as a direct replacement for the 1210-103J without circuit modification?

A: Yes. The 1210R-103J is a direct equivalent with identical electrical specifications (10 µH inductance, 297 mA current rating, 2.1 Ohm DCR) and mechanical package (1210 / 3225 Metric). No circuit modification is required. The primary difference is enhanced RoHS3 compliance status.

Q: What is the key limitation of the CM322522-100JL as a substitute?

A: The CM322522-100JL has a reduced current rating of 140 mA compared to the 297 mA rating of the 1210-103J. This part is suitable only for circuits where the operating current does not exceed 140 mA. Additionally, the operating temperature minimum is -40°C rather than -55°C, and the package is designated as nonstandard with slightly different physical dimensions.

Q: Are there any PCB layout considerations when using the CM322522-100JL?

A: Yes. The CM322522-100JL has different physical dimensions (0.126" L x 0.098" W versus 0.128" L x 0.095" W for the main part) and reduced height (0.087" versus 0.101"). PCB footprint and clearance verification is required before substitution.

Q: What is the difference in moisture sensitivity between these parts?

A: The 1210-103J and 1210R-103J both have MSL 1 (Unlimited), meaning no moisture sensitivity precautions are required during storage or handling. The CM322522-100JL has MSL 3 (168 hours), requiring moisture control during storage and a maximum of 168 hours of floor life after package opening before reflow soldering.

Q: Which substitute offers the best inventory availability?

A: The 1210R-103J offers the highest inventory with 12,347 pieces in stock, compared to 853 pieces for the main part and 11,983 pieces for the CM322522-100JL.

Q: Is the 1210R-103J suitable for applications requiring -55°C operation?

A: Yes. The 1210R-103J maintains the full operating temperature range of -55°C to 125°C, identical to the main part.

Q: Can the CM322522-100JL be used in applications requiring -55°C minimum temperature operation?

A: No. The CM322522-100JL operating temperature range is -40°C to 125°C, which does not meet the -55°C minimum requirement of the main part specification.

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