CIB31P500NE Ferrite Bead 50 Ohm 1206 Equivalent & Substitute Parts

Part Overview

The CIB31P500NE is a 1206 surface mount ferrite bead manufactured by Samsung Electro-Mechanics, rated at 50 Ohms impedance at 100 MHz with a maximum current rating of 2A and 50mOhm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The ferrite bead operates across the temperature range of -55°C to 125°C and complies with RoHS3 and REACH standards.

Key Parameters

Parameter	Value
Impedance @ Frequency	50 Ohms @ 100 MHz
Current Rating (Max)	2A
DC Resistance (DCR) (Max)	50mOhm
Package / Case	1206 (3216 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Height (Max)	0.051" (1.30mm)
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CIB31P500NE is determined by the following critical parameters: impedance value at 100 MHz, package type (1206/3216 Metric), mounting type (surface mount), operating temperature range (-55°C to 125°C), and physical dimensions. Parts are grouped into two categories based on impedance matching:

Exact Impedance Match (50 Ohms @ 100 MHz): Parts that maintain the same impedance specification as the original component. These include BBPY00321611500Y00, BLM31PG500SN1L, BLM31PG500SZ1L, HCB20-500-RC, and 2512065007Y3. These parts are direct functional equivalents with identical impedance characteristics.

Near-Impedance Match (52-60 Ohms @ 100 MHz): Parts with impedance values within the range of 52 to 60 Ohms at 100 MHz, including BBPY00321611600Y00, FBH321611T-520Y-S, and FBH321611T-600Y-S. These parts provide similar filtering characteristics with minor impedance deviation.

All substitute parts share the same 1206 package footprint, surface mount configuration, and operating temperature range. Differences in current rating and DC resistance are secondary parameters that may affect performance in specific circuit applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Product Status	Packaging
CIB31P500NE	Samsung Electro-Mechanics	50 Ohms	2A	50mOhm	Obsolete	-
2512065007Y3	Fair-Rite Products Corp.	50 Ohms	3A	30mOhm	Active	Tape & Reel (TR)
742792114	Würth Elektronik	50 Ohms	3A	25mOhm	Active	Cut Tape (CT) & Digi-Reel®
BBPY00321611500Y00	Pulse Electronics	50 Ohms	4A	20mOhm	Active	Tape & Reel (TR)
BBPY00321611600Y00	Pulse Electronics	60 Ohms	4A	20mOhm	Active	Tape & Reel (TR)
BLM31PG500SN1L	Murata Electronics	50 Ohms	3.5A	15mOhm	Active	Cut Tape (CT) & Digi-Reel®
BLM31PG500SZ1L	Murata Electronics	50 Ohms	3.5A	15mOhm	Active	Tape & Reel (TR)
FBH321611T-520Y-S	Cal-Chip Electronics, Inc.	52 Ohms	3A	40mOhm	Active	Tape & Reel (TR)
FBH321611T-600Y-S	Cal-Chip Electronics, Inc.	60 Ohms	3A	30mOhm	Active	Tape & Reel (TR)
HCB20-500-RC	Allied Components International	50 Ohms	4A	20mOhm	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Exact 50 Ohm Impedance):

The following parts provide exact impedance matching at 50 Ohms @ 100 MHz and are recommended for applications requiring identical electrical characteristics:

BBPY00321611500Y00 (Pulse Electronics): Active product status with 4A current rating and 20mOhm DCR. Offers improved current handling over the original part.
BLM31PG500SN1L (Murata Electronics): Active product with EMIFIL® series designation, 3.5A current rating, and 15mOhm DCR. Extensive inventory availability (268,635 pcs).
BLM31PG500SZ1L (Murata Electronics): Identical electrical specifications to BLM31PG500SN1L with Tape & Reel packaging.
HCB20-500-RC (Allied Components International): Active product with 4A current rating and 20mOhm DCR.
2512065007Y3 (Fair-Rite Products Corp.): Active product with 3A current rating and 30mOhm DCR.

All exact impedance matches comply with RoHS3 and REACH standards with MSL 1 rating.

For Near-Impedance Applications (52-60 Ohm Range):

Parts with impedance deviation from 50 Ohms are suitable for applications where minor impedance variation is acceptable:

BBPY00321611600Y00 (Pulse Electronics): 60 Ohms @ 100 MHz, 4A current rating, active status.
FBH321611T-520Y-S (Cal-Chip Electronics): 52 Ohms @ 100 MHz, 3A current rating, active status.
FBH321611T-600Y-S (Cal-Chip Electronics): 60 Ohms @ 100 MHz, 3A current rating, active status.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance and REACH unaffected status. MSL 1 rating is consistent across all alternatives, indicating unlimited shelf life under standard storage conditions.

Frequently Asked Questions (FAQ)

Q: Can I use a 60 Ohm ferrite bead as a substitute for the 50 Ohm CIB31P500NE?

A: A 60 Ohm ferrite bead (such as BBPY00321611600Y00 or FBH321611T-600Y-S) will provide different impedance characteristics at 100 MHz. The 20% impedance increase will alter the filtering response. Use only if your circuit design permits impedance variation in this range.

Q: What is the difference between the BLM31PG500SN1L and BLM31PG500SZ1L?

A: Both parts are electrically identical with 50 Ohms @ 100 MHz, 3.5A current rating, and 15mOhm DCR. The difference is packaging: SN1L uses Cut Tape & Digi-Reel®, while SZ1L uses Tape & Reel (TR). Select based on your procurement and assembly requirements.

Q: Is the higher current rating of BBPY00321611500Y00 (4A vs. 2A original) a concern?

A: No. A higher current rating indicates the part can handle greater current without exceeding temperature limits. This is a performance improvement and does not create compatibility issues in circuits designed for 2A operation.

Q: Do all substitute parts fit the same PCB footprint?

A: Yes. All listed substitute parts use the 1206 (3216 Metric) package with identical dimensions: 0.126" L x 0.063" W (3.20mm x 1.60mm) and maximum height of 0.051" (1.30mm). They are mechanically interchangeable on the PCB.

Q: What is the significance of the "Power Line" vs. no filter type designation?

A: Filter type indicates the intended application category. Parts designated as "Power Line" (such as BLM31PG500SN1L) are optimized for power supply filtering. Parts without a specific filter type designation are general-purpose ferrite beads. Both are electrically compatible for the CIB31P500NE replacement.

Q: Why does the CIB31P500NE have higher DCR (50mOhm) compared to most substitutes?

A: The original part's higher DC resistance is a characteristic of its design. Substitute parts with lower DCR (15-30mOhm) offer reduced insertion loss and lower heat dissipation, representing an improvement in performance. This does not prevent substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts comply with RoHS3 standards. The original CIB31P500NE also carries RoHS3 compliance, ensuring environmental and regulatory consistency.

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