WLBD2012HCU331TH Ferrite Bead 330 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The WLBD2012HCU331TH is a power line ferrite bead manufactured by Walsin Technology Corporation, rated at 330 Ohms impedance at 100 MHz in a 0805 (2012 Metric) surface mount package. This component is designed for electromagnetic interference (EMI) suppression in power distribution circuits with a maximum current rating of 2A and DC resistance of 90mOhm. The part is currently in active production status with 926 pieces in stock.

Equivalent and substitute ferrite beads are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for components with comparable electrical and mechanical characteristics. Substitute parts must maintain compatibility with the 0805 package footprint and operate within the specified temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	WLBD2012HCU331TH	—
Manufacturer	Walsin Technology Corporation	—
Package / Case	0805 (2012 Metric)	—
Impedance @ Frequency	330 Ohms @ 100 MHz	Ω
Current Rating (Max)	2A	A
DC Resistance (DCR) (Max)	90mOhm	mΩ
Operating Temperature Range	-55°C ~ 125°C	°C
Filter Type	Power Line	—
Number of Lines	1	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Ferrite bead substitution is determined by the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 0805 (2012 Metric) — physical footprint must match for direct PCB replacement
Operating Temperature Range: -55°C ~ 125°C — thermal operating window must be maintained
Number of Lines: 1 — single-line configuration
Mounting Type: Surface Mount — component orientation and placement method

Electrical Performance Criteria:

Impedance @ Frequency: 330 Ohms @ 100 MHz — core filtering characteristic
Current Rating (Max): 2A minimum — thermal and saturation limits
DC Resistance (DCR) (Max): 90mOhm maximum — power dissipation and insertion loss

Substitute parts are grouped into two categories:

Category A — Direct Equivalents (330 Ohm @ 100 MHz): Parts with identical impedance specification at 100 MHz, matching the primary part's filtering performance. These include BBPY00201209331Y00, BBUP00201209331Y00, HCB10-331-RC, MPZ2012S331AT000, and 742792037.

Category B — Parametric Equivalents (300-320 Ohm @ 100 MHz): Parts with impedance values within ±10% of the primary specification (300-330 Ohms @ 100 MHz). These include 2176487-1, 2508053017Y3, 742792031, and BBPY00201209301Y00. These parts maintain functional compatibility for applications where impedance tolerance permits deviation from the nominal 330 Ohm specification.

All substitute parts maintain the 0805 package footprint, single-line configuration, and -55°C to 125°C operating temperature range.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Filter Type	Temp Range	Packaging Format
WLBD2012HCU331TH	Walsin Technology Corporation	330 Ω	2A	90mΩ	0805	Power Line	-55°C ~ 125°C	Tape & Reel (TR)
2176487-1	TE Connectivity Passive Product	300 Ω	3A	50mΩ	0805	Signal Line	-55°C ~ 125°C	Cut Tape (CT)
2508053017Y3	Fair-Rite Products Corp.	300 Ω	3A	50mΩ	0805	Signal Line	-55°C ~ 125°C	Cut Tape (CT) & Digi-Reel®
742792031	Würth Elektronik	300 Ω	3A	50mΩ	0805	Signal Line	-55°C ~ 125°C	—
742792037	Würth Elektronik	330 Ω	2A	80mΩ	0805	Signal Line	-55°C ~ 125°C	Tape & Reel (TR)
74279220321	Würth Elektronik	320 Ω	2.5A	50mΩ	0805	—	-55°C ~ 125°C	Tape & Reel (TR)
BBPY00201209301Y00	Pulse Electronics	300 Ω	2A	80mΩ	0805	—	-55°C ~ 125°C	Tape & Reel (TR)
BBPY00201209331Y00	Pulse Electronics	330 Ω	2A	80mΩ	0805	—	-55°C ~ 125°C	Tape & Reel (TR)
BBUP00201209331Y00	Pulse Electronics	330 Ω	3A	50mΩ	0805	—	-55°C ~ 125°C	Tape & Reel (TR)
HCB10-331-RC	Allied Components International	330 Ω	2A	80mΩ	0805	Power Line	-55°C ~ 125°C	Tape & Reel (TR)
MPZ2012S331AT000	TDK Corporation	330 Ω	2.5A	50mΩ	0805	Power Line	-55°C ~ 125°C	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

BBPY00201209331Y00 (Pulse Electronics) and BBUP00201209331Y00 (Pulse Electronics) are direct impedance matches at 330 Ohms @ 100 MHz with identical package specifications. Both are ROHS3 compliant and maintain the 0805 footprint. BBUP00201209331Y00 offers superior current handling at 3A with reduced DCR of 50mOhm, providing enhanced thermal performance. BBPY00201209331Y00 maintains the original 2A current rating with 80mOhm DCR.

MPZ2012S331AT000 (TDK Corporation) provides 330 Ohm impedance with improved current capacity (2.5A) and lower DCR (50mOhm). This part is ROHS3 compliant and available in Cut Tape & Digi-Reel® packaging. The reduced height specification (0.041" vs. 0.043") ensures compatibility with space-constrained layouts.

HCB10-331-RC (Allied Components International) matches the primary part's power line filter classification and 330 Ohm impedance specification. This part is RoHS compliant and maintains identical current and temperature ratings.

Parametric Equivalents (±10% Impedance Tolerance):

742792037 (Würth Elektronik WE-CBF series) provides 330 Ohm impedance with 80mOhm DCR and 2A current rating. The WE-CBF series is ROHS3 compliant and available in Tape & Reel packaging.

74279220321 (Würth Elektronik WE-MPSB series) offers 320 Ohm impedance with enhanced current capacity (2.5A) and reduced DCR (50mOhm). This part is suitable for applications where impedance tolerance of ±3% is acceptable.

2508053017Y3 (Fair-Rite Products Corp.) and 2176487-1 (TE Connectivity) provide 300 Ohm impedance with superior current ratings (3A) and lower DCR (50mOhm). These parts are classified as signal line filters and are ROHS3 compliant. Selection of these parts is appropriate when impedance tolerance of ±9% is permissible and higher current capacity is beneficial.

Compliance and Certification:

All substitute parts maintain the -55°C to 125°C operating temperature range and 0805 package footprint. ROHS3 compliance is confirmed for all substitute parts except HCB10-331-RC, which carries standard RoHS compliance. REACH compliance status is confirmed as "REACH Unaffected" for all Würth Elektronik, TE Connectivity, Fair-Rite, Pulse Electronics, and TDK parts. HCB10-331-RC indicates REACH information available upon request.

Frequently Asked Questions (FAQ)

Q: Can I use a 300 Ohm ferrite bead as a substitute for the 330 Ohm WLBD2012HCU331TH?

A: Yes, 300 Ohm ferrite beads (2176487-1, 2508053017Y3, 742792031, BBPY00201209301Y00) are parametric equivalents with impedance within ±10% of the primary specification. These parts maintain the 0805 package footprint and -55°C to 125°C operating temperature range. Selection depends on whether your application permits ±9% impedance deviation from the nominal 330 Ohm specification.

Q: What is the difference between power line and signal line ferrite beads?

A: Power line ferrite beads are designed for higher current applications in power distribution circuits, while signal line beads are optimized for lower-current signal integrity applications. The WLBD2012HCU331TH is classified as a power line filter. Direct power line equivalents include HCB10-331-RC and MPZ2012S331AT000. Signal line alternatives (2176487-1, 2508053017Y3, 742792037) may be used if circuit current requirements are compatible.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Most substitute parts are available in Tape & Reel (TR) format, including BBPY00201209331Y00, BBUP00201209331Y00, HCB10-331-RC, 742792037, and 74279220321. TE Connectivity 2176487-1 and Fair-Rite 2508053017Y3 are available in Cut Tape (CT) & Digi-Reel® formats. TDK MPZ2012S331AT000 is available in Cut Tape (CT) & Digi-Reel® packaging. Packaging format selection depends on your assembly process requirements.

Q: Does the DC resistance (DCR) difference between parts affect circuit performance?

A: DC resistance affects power dissipation and insertion loss. The primary part WLBD2012HCU331TH has 90mOhm DCR. Substitute parts with lower DCR values (50mOhm in BBUP00201209331Y00, MPZ2012S331AT000, 2176487-1, 2508053017Y3, 742792031, 74279220321) result in reduced power dissipation. Parts with 80mOhm DCR (742792037, BBPY00201209331Y00, HCB10-331-RC, BBPY00201209301Y00) provide comparable thermal performance to the primary part.

Q: Can I use a ferrite bead with higher current rating than the original specification?

A: Yes. Parts with current ratings exceeding 2A (such as BBUP00201209331Y00 at 3A, MPZ2012S331AT000 at 2.5A, 2176487-1 at 3A, 2508053017Y3 at 3A, 742792031 at 3A, 74279220321 at 2.5A) provide additional thermal margin and are suitable for applications where the circuit current does not exceed the substitute part's rating. Higher current ratings do not negatively impact performance in lower-current applications.

Q: Are all substitute parts RoHS and REACH compliant?

A: ROHS3 compliance is confirmed for all substitute parts except HCB10-331-RC, which carries standard RoHS compliance. REACH compliance status is "REACH Unaffected" for Würth Elektronik, TE Connectivity, Fair-Rite, Pulse Electronics, and TDK parts. HCB10-331-RC indicates REACH information available upon request. Verify compliance requirements with your procurement specifications before final part selection.

Q: What is the significance of the 0805 (2012 Metric) package designation?

A: The 0805 package designation refers to the physical dimensions of the component: 0.080 inches (2.00mm) length and 0.050 inches (1.25mm) width. All substitute parts maintain this footprint, ensuring direct PCB compatibility without layout modifications. Height specifications vary slightly (0.041" to 0.043"), but all parts remain within standard 0805 height tolerances for surface mount assembly.

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