3225R-104K Equivalent & Substitute Parts

Part Overview

The 3225R-104K is a 100 µH unshielded ferrite core inductor rated for 120 mA with a maximum DC resistance of 13 Ohm, manufactured by API Delevan Inc. in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Key Parameters

Parameter	Value
Inductance	100 µH
Tolerance	±10%
Current Rating	120 mA
DC Resistance (Max)	13 Ohm
Core Material	Ferrite
Shielding	Unshielded
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	1210 (3225 Metric)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

The 1210R-104K qualifies as a direct substitute for the 3225R-104K based on the following critical parameters:

Electrical specifications are identical: 100 µH inductance at ±10% tolerance, 120 mA current rating, and 13 Ohm maximum DC resistance. Both components utilize ferrite core construction with unshielded design and operate across the same temperature range of -55°C to 125°C.

Mechanical compatibility is maintained within acceptable tolerances. Both parts are surface mount inductors with dimensions within 0.002" (0.06 mm) variation in length and width, and height difference of 0.007" (0.18 mm), which falls within standard PCB assembly tolerances for 1210-class components.

Compliance and regulatory status are equivalent: both parts are ROHS3 compliant, REACH unaffected, and classified under the same HTSUS code (8504.50.8000). Moisture sensitivity level remains at MSL 1 (Unlimited) for both parts.

The primary distinction is product status: the 1210R-104K is active with 1084 units in stock, whereas the 3225R-104K is obsolete with 691 units remaining.

Parameter Comparison

Parameter	3225R-104K (Main Part)	1210R-104K (Substitute)
Manufacturer	API Delevan Inc.	API Delevan Inc.
Inductance	100 µH	100 µH
Tolerance	±10%	±10%
Current Rating (Amps)	120 mA	120 mA
DC Resistance (Max)	13 Ohm	13 Ohm
Core Material	Ferrite	Ferrite
Shielding	Unshielded	Unshielded
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Q @ 2.5 MHz	25	30
Frequency - Self Resonant	8 MHz	8 MHz
Mounting Type	Surface Mount	Surface Mount
Package / Case	1210 (3225 Metric)	2-SMD
Length	0.126" (3.20 mm)	0.128" (3.26 mm)
Width	0.094" (2.40 mm)	0.095" (2.41 mm)
Height - Seated (Max)	0.094" (2.40 mm)	0.101" (2.57 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 1210R-104K is the recommended substitute for the obsolete 3225R-104K. Both components are manufactured by API Delevan Inc. and share identical electrical specifications, core material, and operating characteristics. The substitute part maintains full compliance with ROHS3 and REACH requirements, ensuring regulatory continuity.

The 1210R-104K is currently in active production status with significantly higher inventory availability (1084 units versus 691 units), providing superior supply chain security for ongoing production and field replacement applications.

Physical dimensions are compatible within standard surface mount assembly tolerances. The height difference of 0.007" (0.18 mm) is within acceptable PCB clearance margins for typical circuit board designs. The Q factor improvement at 2.5 MHz (30 versus 25) represents a performance enhancement with no negative impact on circuit functionality.

Frequently Asked Questions (FAQ)

Q: Are the 3225R-104K and 1210R-104K electrically interchangeable?

A: Yes. Both inductors provide 100 µH inductance at ±10% tolerance, 120 mA current rating, and 13 Ohm maximum DC resistance. Electrical performance is identical across the specified operating temperature range of -55°C to 125°C.

Q: What is the physical difference between these parts?

A: The 1210R-104K is slightly larger in all dimensions. Length increases by 0.002" (0.06 mm), width by 0.001" (0.01 mm), and height by 0.007" (0.18 mm). These variations are within standard PCB assembly tolerances and do not affect placement or clearance in typical circuit designs.

Q: Can I use the 1210R-104K as a direct replacement on existing PCBs designed for the 3225R-104K?

A: Yes, provided PCB layout includes standard clearance margins. The dimensional differences are minimal and fall within typical manufacturing tolerances for 1210-class surface mount components. Verify that the increased height does not conflict with component stacking or enclosure constraints in your specific application.

Q: Why is the 3225R-104K obsolete?

A: The 3225R-104K has been discontinued by the manufacturer. The 1210R-104K represents the active equivalent in the API Delevan product line and is the recommended replacement for new designs and ongoing production.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under HTSUS code 8504.50.8000. Moisture sensitivity level is MSL 1 (Unlimited) for both components, indicating no special storage or handling requirements.

Q: What is the difference in Q factor between these inductors?

A: The 1210R-104K exhibits a Q factor of 30 at 2.5 MHz, compared to 25 for the 3225R-104K. This represents improved efficiency and lower losses in the substitute part, with no negative impact on circuit performance.

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