WLBD1608HCU331TL Equivalent & Substitute Parts

Part Overview

The WLBD1608HCU331TL is a power line ferrite bead manufactured by Walsin Technology Corporation, rated at 330 Ohms impedance at 100 MHz in a 0603 (1608 Metric) surface mount package. This component is designed for electromagnetic interference (EMI) suppression in single-line power applications. The part maintains Active product status with unlimited moisture sensitivity level (MSL 1) and operates across the industrial temperature range of -55°C to 125°C. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Impedance @ 100 MHz	330	Ohms
Current Rating (Maximum)	1.7	A
DC Resistance (Maximum)	80	mOhm
Package / Case	0603 (1608 Metric)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 125	°C
Number of Lines	1	—
Filter Type	Power Line	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the WLBD1608HCU331TL are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

Impedance @ 100 MHz: 330 Ohms (exact match required for primary equivalents)
Package / Case: 0603 (1608 Metric) (mandatory for mechanical fit)
Mounting Type: Surface Mount (required for assembly compatibility)
Number of Lines: 1 (functional requirement)
Operating Temperature Range: -55°C to 125°C (minimum requirement)
Moisture Sensitivity Level: 1 (Unlimited) (handling and storage compatibility)

Secondary Compatibility Parameters:

Current Rating: Minimum 1.7A (equal or higher ratings are acceptable)
DC Resistance: Maximum 80 mOhm (equal or lower values are acceptable)
Filter Type: Power Line (functional classification)

Substitute parts meeting all critical parameters and maintaining or exceeding secondary parameters are classified as direct equivalents. Parts with impedance values of 300 Ohms at 100 MHz are classified as parametric equivalents suitable for applications where impedance tolerance permits.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz (Ohms)	Current Rating (A)	DC Resistance (mOhm)	Package	Operating Temperature (°C)	Product Status
WLBD1608HCU331TL	Walsin Technology Corporation	330	1.7	80	0603 (1608 Metric)	-55 to 125	Active
BBHV00160808331Y00	Pulse Electronics	330	2.0	80	0603 (1608 Metric)	-55 to 125	Active
BLM18KG331SN1D	Murata Electronics	330	1.7	80	0603 (1608 Metric)	-55 to 125	Active
MPZ1608S331ATA00	TDK Corporation	330	1.7	80	0603 (1608 Metric)	-55 to 125	Active
BBHV00160808301Y00	Pulse Electronics	300	2.0	80	0603 (1608 Metric)	-55 to 125	Active
HFZ 1608PF-301T22	TAI-TECH Advanced Electronics Co., Ltd.	300	2.2	70	0603 (1608 Metric)	-55 to 125	Active

Engineering Selection Recommendations

Direct Equivalents (330 Ohms @ 100 MHz):

The following parts provide direct electrical equivalence to the WLBD1608HCU331TL with identical impedance specifications:

BBHV00160808331Y00 (Pulse Electronics): Maintains 330 Ohms impedance with increased current rating of 2.0A. ROHS3 Compliant and REACH Unaffected. Suitable for applications requiring higher current capacity within the same impedance specification.
BLM18KG331SN1D (Murata Electronics): Maintains 330 Ohms impedance and 1.7A current rating with identical DC resistance. ROHS3 Compliant and REACH Unaffected. Part of the EMIFIL® series with established reliability in power line filtering applications.
MPZ1608S331ATA00 (TDK Corporation): Maintains 330 Ohms impedance and 1.7A current rating with identical DC resistance. ROHS3 Compliant and REACH Unaffected. Part of the MPZ series with established performance in EMI suppression.

Parametric Equivalents (300 Ohms @ 100 MHz):

The following parts provide parametric equivalence with reduced impedance specification:

BBHV00160808301Y00 (Pulse Electronics): Rated at 300 Ohms impedance with 2.0A current rating and identical DC resistance. ROHS3 Compliant and REACH Unaffected. Suitable for applications where 300 Ohms impedance meets filtering requirements.
HFZ 1608PF-301T22 (TAI-TECH Advanced Electronics Co., Ltd.): Rated at 300 Ohms impedance with 2.2A current rating and 70 mOhm DC resistance. RoHS Compliant and REACH Unaffected. Offers superior current handling and lower DC resistance.

All substitute parts maintain Active product status, identical package dimensions (0603 / 1608 Metric), surface mount compatibility, and operating temperature range (-55°C to 125°C). All parts carry MSL 1 (Unlimited) moisture sensitivity level.

Frequently Asked Questions (FAQ)

Q: Can BBHV00160808331Y00 be used as a direct replacement for WLBD1608HCU331TL?

A: Yes. Both parts are rated at 330 Ohms impedance at 100 MHz, feature identical 0603 (1608 Metric) packaging, and operate across -55°C to 125°C. The BBHV00160808331Y00 provides higher current rating (2.0A versus 1.7A), making it suitable for applications with identical or lower current requirements.

Q: What is the difference between 330 Ohms and 300 Ohms impedance ferrite beads?

A: Impedance rating determines the frequency-dependent attenuation characteristics of the ferrite bead. A 330 Ohms bead provides greater impedance at 100 MHz compared to a 300 Ohms bead. Selection between these values depends on the specific EMI filtering requirements of the application. Direct equivalents maintain the 330 Ohms specification; parametric equivalents operate at 300 Ohms.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed carry either ROHS3 Compliant or RoHS Compliant status. The original WLBD1608HCU331TL does not specify RoHS status in the provided data. All substitute parts are REACH Unaffected.

Q: Can I use a ferrite bead with higher current rating than required?

A: Yes. A ferrite bead with current rating equal to or higher than the application requirement is acceptable. Higher current ratings indicate the component can handle greater thermal stress without performance degradation. The BBHV00160808331Y00 and HFZ 1608PF-301T22 both provide increased current capacity.

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

A: DC Resistance represents the resistive loss of the ferrite bead at direct current. Lower DC resistance reduces power dissipation and heat generation in the circuit. The WLBD1608HCU331TL specifies 80 mOhm maximum. The HFZ 1608PF-301T22 offers 70 mOhm, providing lower power loss. Equal or lower DCR values are acceptable substitutes.

Q: Are packaging differences between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® significant?

A: Packaging format affects supply chain logistics and handling but does not impact electrical or mechanical performance. Both formats are compatible with standard surface mount assembly processes. Selection between packaging types depends on manufacturing workflow and inventory management requirements.

Q: Can BLM18KG331SN1D replace WLBD1608HCU331TL in existing designs?

A: Yes. The BLM18KG331SN1D maintains identical electrical specifications (330 Ohms, 1.7A, 80 mOhm) and mechanical compatibility (0603 package, surface mount). Both parts operate across -55°C to 125°C with MSL 1 rating. The BLM18KG331SN1D is part of Murata's EMIFIL® series.

Q: What is the operating temperature range significance?

A: The operating temperature range (-55°C to 125°C) defines the environmental conditions under which the ferrite bead maintains specified electrical performance. All listed substitute parts match or exceed this range, ensuring compatibility across industrial and commercial applications.

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