CIC21P331NC Equivalent & Substitute Parts

Part Overview

The CIC21P331NC is a 330 Ohm ferrite bead manufactured by Samsung Electro-Mechanics, designed for power line filtering applications in 0805 (2012 Metric) surface mount packages. This component operates at 100 MHz with a maximum current rating of 2A and DC resistance of 50mOhm. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	330 Ohms
Package / Case	0805 (2012 Metric)
Current Rating (Max)	2A
DC Resistance (Max)	50mOhm
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
Number of Lines	1
Filter Type	Power Line
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CIC21P331NC ferrite bead is determined by the following critical parameters:

Electrical Compatibility:

Impedance at 100 MHz must be 330 Ohms or within acceptable tolerance for the application
DC resistance maximum of 50mOhm or lower
Current rating must equal or exceed 2A
Operating temperature range must encompass -55°C to 125°C

Mechanical Compatibility:

Package must be 0805 (2012 Metric)
Surface mount mounting type
Single line configuration
Physical dimensions within specified tolerances

Regulatory Compliance:

RoHS3 compliance required
REACH unaffected status

Substitute parts are grouped into two categories: Direct Impedance Matches (330 Ohms @ 100 MHz) and Near-Impedance Alternatives (300-320 Ohms @ 100 MHz). Direct matches provide pin-for-pin compatibility with identical electrical performance. Near-impedance alternatives offer functional substitution where impedance variation is acceptable within circuit design margins.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Product Status	RoHS Status
CIC21P331NC	Samsung Electro-Mechanics	330 Ohms	2A	50mOhm	0805 (2012 Metric)	Obsolete	ROHS3 Compliant
BBUP00201209331Y00	Pulse Electronics	330 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
FBH201209T-331Y-S	Cal-Chip Electronics, Inc.	330 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	RoHS Compliant
MH2029-331T	Bourns Inc.	330 Ohms	2.8A	40mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
HFZ 2012PF-331T28	TAI-TECH Advanced Electronics Co., Ltd.	330 Ohms	2.8A	40mOhm	0805 (2012 Metric)	Active	RoHS Compliant
2176487-1	TE Connectivity Passive Product	300 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
2508053017Y3	Fair-Rite Products Corp.	300 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
742792031	Würth Elektronik	300 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
74279220321	Würth Elektronik	320 Ohms	2.5A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
BBUP00201209301Y00	Pulse Electronics	300 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
FBH201209T-301Y-S	Cal-Chip Electronics, Inc.	300 Ohms	3A	50mOhm	0805 (2012 Metric)	Active	RoHS Compliant

Engineering Selection Recommendations

Direct Impedance Substitutes (330 Ohms @ 100 MHz):

The following parts provide direct electrical equivalence to the CIC21P331NC with identical impedance at 100 MHz:

BBUP00201209331Y00 (Pulse Electronics): Active status, 3A current rating, 50mOhm DCR, ROHS3 compliant. Exceeds original current specification.
FBH201209T-331Y-S (Cal-Chip Electronics, Inc.): Active status, 3A current rating, 50mOhm DCR, RoHS compliant. Highest inventory availability (181,095 pcs). Exceeds original current specification.
MH2029-331T (Bourns Inc.): Active status, 2.8A current rating, 40mOhm DCR (improved), ROHS3 compliant. Meets or exceeds original specifications with lower DC resistance.
HFZ 2012PF-331T28 (TAI-TECH Advanced Electronics Co., Ltd.): Active status, 2.8A current rating, 40mOhm DCR (improved), RoHS compliant. Meets or exceeds original specifications.

Near-Impedance Alternatives (300-320 Ohms @ 100 MHz):

These parts provide functional substitution where impedance variation within 10% is acceptable:

2176487-1 (TE Connectivity Passive Product): 300 Ohms, 3A rating, active status, ROHS3 compliant.
2508053017Y3 (Fair-Rite Products Corp.): 300 Ohms, 3A rating, active status, ROHS3 compliant.
742792031 (Würth Elektronik): 300 Ohms, 3A rating, active status, ROHS3 compliant. High inventory (51,961 pcs).
74279220321 (Würth Elektronik): 320 Ohms, 2.5A rating, active status, ROHS3 compliant.
BBUP00201209301Y00 (Pulse Electronics): 300 Ohms, 3A rating, active status, ROHS3 compliant.
FBH201209T-301Y-S (Cal-Chip Electronics, Inc.): 300 Ohms, 3A rating, active status, RoHS compliant. High inventory (45,086 pcs).

All substitute parts maintain the 0805 (2012 Metric) package, surface mount configuration, and operating temperature range of -55°C to 125°C. Selection should prioritize active status components with ROHS3 compliance and adequate current ratings for the application circuit.

Frequently Asked Questions (FAQ)

Q: Can I use a 300 Ohm ferrite bead instead of the 330 Ohm CIC21P331NC?

A: Yes, if circuit design margins permit impedance variation. A 300 Ohm bead represents a 9% reduction from 330 Ohms. Functional substitution is acceptable where EMI filtering performance tolerates this impedance difference. Direct 330 Ohm matches are preferred for identical electrical performance.

Q: What is the significance of DC resistance (DCR) in ferrite bead selection?

A: DC resistance affects power dissipation and insertion loss in the circuit. The CIC21P331NC specifies 50mOhm maximum. Substitute parts with 40mOhm DCR (MH2029-331T, HFZ 2012PF-331T28) provide improved performance with lower power loss. Parts with 50mOhm DCR maintain equivalent performance.

Q: Are all substitute parts compatible with the original PCB footprint?

A: Yes. All listed substitutes use the 0805 (2012 Metric) package with identical mounting type (surface mount). Physical dimensions are within specification tolerances. No PCB redesign is required.

Q: Why do some substitutes have higher current ratings than the original 2A specification?

A: Higher current ratings indicate improved thermal performance and design margin. A 3A-rated ferrite bead can safely operate at 2A with reduced thermal stress. This represents an engineering improvement over the original component.

Q: What is the difference between Power Line and Signal Line ferrite beads?

A: The CIC21P331NC is specified as a Power Line ferrite bead. Most direct 330 Ohm substitutes (FBH201209T-331Y-S, MH2029-331T) are also Power Line or Power/Signal Line rated. Some 300 Ohm alternatives are Signal Line rated. Filter type designation reflects the intended application; substitution should maintain the same filter type classification where possible.

Q: Is RoHS3 compliance required for all substitutes?

A: The original CIC21P331NC is ROHS3 compliant. Most active substitutes maintain ROHS3 compliance. Some alternatives (FBH201209T-331Y-S, FBH201209T-301Y-S, HFZ 2012PF-331T28) carry RoHS compliance without specific ROHS3 designation. Both certifications are acceptable for regulatory purposes.

Q: Which substitute offers the best inventory availability?

A: FBH201209T-331Y-S (Cal-Chip Electronics, Inc.) provides the highest inventory with 181,095 pieces in stock, offering supply chain reliability for production requirements.

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