BLM18HB331SN1D Equivalent & Substitute Parts

Part Overview

The BLM18HB331SN1D is a signal line ferrite bead manufactured by Murata Electronics in the EMIFIL® BLM18 series. This 0603 (1608 Metric) surface mount component provides 330 Ohms impedance at 100 MHz with a maximum current rating of 50mA and DC resistance of 1.2 Ohm. The part is Active in product status and widely used in signal conditioning and EMI filtering applications. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

BLM18HB331SN1D

Murata ElectronicsIn Stock: 1812BLM18HB331SN1D Datasheet

Current PartRFQ

2506033317H0

Fair-Rite Products Corp.In Stock: 69072506033317H0 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BLM18HB331SN1D is determined by strict equivalence across the following critical parameters:

• Impedance value: 330 Ohms @ 100 MHz
• Filter type: Signal Line (single line)
• Package: 0603 (1608 Metric) surface mount
• Current rating: 50mA maximum
• DC resistance: 1.2 Ohm maximum
• Operating temperature range: -55°C to 125°C
• Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part 2506033317H0 from Fair-Rite Products Corp. meets all these electrical and mechanical specifications, enabling direct substitution in the same PCB footprint and circuit application.

Parameter Comparison

Engineering Selection Recommendations

Both the BLM18HB331SN1D and 2506033317H0 are Active products with identical electrical specifications and compliance certifications. Selection between these parts is based on availability, lead time, and procurement requirements. The Fair-Rite part 2506033317H0 has a maximum height of 0.043" (1.10mm) compared to the Murata part at 0.037" (0.95mm); this 0.006" (0.15mm) difference must be evaluated for PCB clearance constraints in applications with height-sensitive layouts. Both parts satisfy ROHS3 and REACH compliance requirements for regulated markets.

Frequently Asked Questions (FAQ)

Q: Can 2506033317H0 be used as a direct replacement for BLM18HB331SN1D?

A: Yes. Both parts share identical electrical specifications (330 Ohms @ 100 MHz, 50mA current rating, 1.2 Ohm DCR) and the same 0603 (1608 Metric) package footprint. The height difference of 0.006" (0.15mm) must be verified against PCB clearance requirements.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and rated for -55°C to 125°C operation. Moisture Sensitivity Level is 1 (Unlimited) for both.

Q: What is the significance of the impedance value at 100 MHz?

A: The 330 Ohms impedance at 100 MHz defines the ferrite bead's filtering performance for high-frequency signal conditioning. Substitutes must match this value to maintain equivalent EMI attenuation characteristics.

Q: Does the DC resistance specification affect substitution?

A: Yes. The 1.2 Ohm maximum DC resistance is a critical parameter that determines signal insertion loss and power dissipation. Substitute parts must not exceed this specification.

Q: Are these parts suitable for high-current applications?

A: Both parts are rated for a maximum current of 50mA. Applications requiring higher current ratings require alternative ferrite bead models with higher current specifications.