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LI0603D301R-00 Equivalent & Substitute Parts
Part Overview
The LI0603D301R-00 is a ferrite bead manufactured by Laird-Signal Integrity Products, designed for power and signal line filtering applications. This component features 300 Ohms impedance at 100 MHz, rated for 400mA maximum current, and is packaged in the 0603 (1608 Metric) surface mount form factor. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Impedance @ 100 MHz | 300 Ohms |
| Current Rating (Max) | 400mA |
| DC Resistance (Max) | 350mOhm |
| Package / Case | 0603 (1608 Metric) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 125°C |
| Filter Type | Power, Signal Line |
| Number of Lines | 1 |
Substitute Part Grouping Explanation
Substitution for the LI0603D301R-00 is determined by the following critical parameters:
Primary Matching Criteria:
- Impedance at 100 MHz: 300 Ohms (exact match required for primary substitutes)
- Package / Case: 0603 (1608 Metric) (mandatory for form factor compatibility)
- Mounting Type: Surface Mount (required for PCB assembly compatibility)
- Number of Lines: 1 (single line configuration)
Secondary Compatibility Parameters:
- Current Rating: Minimum 400mA (equal or higher acceptable)
- DC Resistance: Maximum 350mOhm (lower values acceptable)
- Operating Temperature: Minimum -40°C to 125°C range (wider ranges acceptable)
- Filter Type: Power and/or Signal Line applications
Substitute parts are grouped into two categories:
Direct Manufacturer Equivalent: LI0603D301R-10 maintains identical electrical specifications with improved product status (Active vs. Obsolete) and enhanced RoHS compliance.
Parametric Equivalents: Parts with 300 Ohms impedance at 100 MHz in 0603 package from alternative manufacturers (Pulse Electronics, Murata Electronics, TE Connectivity, Central Technologies, Cal-Chip Electronics) that meet or exceed the current rating and temperature specifications.
Near-Equivalent Alternatives: Parts with impedance values of 240 Ohms or 330 Ohms at 100 MHz in 0603 package, suitable for applications where impedance tolerance permits deviation from the original 300 Ohms specification.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Impedance @ 100 MHz | Current Rating (Max) | DC Resistance (Max) | Operating Temperature | Package / Case | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| LI0603D301R-00 | Laird-Signal Integrity Products | 300 Ohms | 400mA | 350mOhm | -40°C ~ 125°C | 0603 (1608 Metric) | Obsolete | RoHS non-compliant |
| LI0603D301R-10 | Laird-Signal Integrity Products | 300 Ohms @ 100 MHz | 400mA | 350mOhm | -40°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BBGK00160808301Y00 | Pulse Electronics | 300 Ohms @ 100 MHz | 500mA | 250mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BBGK00160808331Y00 | Pulse Electronics | 330 Ohms @ 100 MHz | 400mA | 300mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BBNQ00160808241Y00 | Pulse Electronics | 240 Ohms @ 100 MHz | 400mA | 350mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BLM18AG331SN1D | Murata Electronics | 330 Ohms @ 100 MHz | 500mA | 300mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BLM18EG331TN1D | Murata Electronics | 330 Ohms @ 100 MHz | 500mA | 210mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BMC1JY0240AN | TE Connectivity Passive Product | 240 Ohms @ 100 MHz | 500mA | 170mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| BMC1JY0300AN | TE Connectivity Passive Product | 300 Ohms @ 100 MHz | 600mA | 200mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| CTCB0603F-301M | Central Technologies | 300 Ohms @ 100 MHz | 500mA | 250mOhm | -40°C ~ 125°C | 0603 (1608 Metric) | Active | ROHS3 Compliant |
| FB160808T-331Y-S | Cal-Chip Electronics, Inc. | 330 Ohms @ 100 MHz | 500mA | 300mOhm | -55°C ~ 125°C | 0603 (1608 Metric) | Active | RoHS Compliant |
Engineering Selection Recommendations
Tier 1 - Direct Equivalent (Recommended Primary Choice):
LI0603D301R-10 is the direct manufacturer equivalent from Laird-Signal Integrity Products. This part maintains identical electrical specifications (300 Ohms @ 100 MHz, 400mA, 350mOhm DCR) and mechanical compatibility with the obsolete LI0603D301R-00. The primary advantage is upgraded product status from Obsolete to Active and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.
Tier 2 - Parametric Equivalents (300 Ohms @ 100 MHz):
BMC1JY0300AN (TE Connectivity) and CTCB0603F-301M (Central Technologies) provide exact impedance matching at 300 Ohms @ 100 MHz with enhanced electrical performance. BMC1JY0300AN offers superior current rating (600mA vs. 400mA) and lower DC resistance (200mOhm vs. 350mOhm), with extended temperature range (-55°C to 125°C). CTCB0603F-301M provides 500mA current rating and 250mOhm DCR with matching temperature range to the original part (-40°C to 125°C).
BBGK00160808301Y00 (Pulse Electronics) delivers 300 Ohms impedance with 500mA current rating and 250mOhm DCR, suitable for applications requiring higher current capacity.
Tier 3 - Near-Equivalent Alternatives (240 Ohms or 330 Ohms @ 100 MHz):
Parts with 330 Ohms impedance (BBGK00160808331Y00, BLM18AG331SN1D, BLM18EG331TN1D, FB160808T-331Y-S) are suitable for applications where impedance tolerance permits a 10% increase from the original 300 Ohms specification. These alternatives offer improved current ratings (400-500mA) and lower DC resistance values (210-300mOhm).
Parts with 240 Ohms impedance (BBNQ00160808241Y00, BMC1JY0240AN) are suitable for applications where impedance tolerance permits a 20% decrease from the original 300 Ohms specification. These alternatives provide 400-500mA current ratings and lower DC resistance (170-350mOhm).
All substitute parts listed maintain 0603 (1608 Metric) package compatibility, surface mount configuration, and single-line ferrite bead topology. All active alternatives carry ROHS3 or RoHS compliance certification.
Frequently Asked Questions (FAQ)
Q: Can LI0603D301R-10 be used as a direct replacement for LI0603D301R-00?
A: Yes. LI0603D301R-10 is the direct manufacturer equivalent with identical electrical specifications (300 Ohms @ 100 MHz, 400mA, 350mOhm DCR) and mechanical form factor (0603 package, surface mount). The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit redesign is required.
Q: What is the difference between the 0603 package designation and 1608 Metric?
A: 0603 and 1608 Metric refer to the same physical package size. 0603 is the imperial designation (0.063" L x 0.032" W), while 1608 Metric is the metric equivalent (1.60mm x 0.80mm). These terms are interchangeable for component selection purposes.
Q: Can I use BMC1JY0300AN (600mA rating) instead of the original 400mA part?
A: Yes. Higher current ratings are acceptable in substitution. BMC1JY0300AN maintains the same 300 Ohms impedance at 100 MHz and 0603 package, with superior current handling (600mA vs. 400mA) and lower DC resistance (200mOhm vs. 350mOhm). This part is suitable for applications requiring the original specifications or higher performance margins.
Q: What does "Parametric Equivalent" mean in this context?
A: A parametric equivalent maintains the same critical electrical specifications (impedance, frequency, package, mounting type) as the original part but may be from a different manufacturer. These parts are functionally interchangeable for the intended application while potentially offering improved performance characteristics such as higher current ratings or lower DC resistance.
Q: Can I substitute a 330 Ohms ferrite bead for the 300 Ohms original part?
A: Substitution with 330 Ohms impedance is possible only if the application circuit design permits a 10% impedance increase. The ferrite bead's impedance directly affects EMI filtering performance. Verify circuit requirements and filtering specifications before selecting a near-equivalent alternative. If exact impedance matching is required, use only 300 Ohms parts.
Q: What is the significance of RoHS compliance in ferrite bead selection?
A: RoHS compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead, cadmium, mercury, and other hazardous materials. ROHS3 compliant parts (LI0603D301R-10, BBGK00160808301Y00, and others) are required for applications subject to EU RoHS directives and similar regulatory frameworks. The original LI0603D301R-00 is RoHS non-compliant, making compliant alternatives necessary for new designs and regulated markets.
Q: Does operating temperature range affect ferrite bead substitution?
A: Operating temperature range affects suitability for specific applications. The original LI0603D301R-00 operates from -40°C to 125°C. Substitute parts with extended ranges (-55°C to 125°C) provide additional margin for extreme environment applications. Parts with matching or wider temperature ranges are acceptable substitutes. Verify application temperature requirements before selection.
Q: What is DC Resistance (DCR) and why does it matter in ferrite bead selection?
A: DC Resistance is the resistive component of the ferrite bead's impedance at direct current. Lower DCR values reduce power dissipation and heat generation in the component. The original part specifies 350mOhm maximum DCR. Substitute parts with lower DCR values (200-250mOhm) provide improved thermal performance. Higher DCR values are not acceptable substitutes.
Q: Are there packaging differences between substitute parts?
A: Most substitute parts are available in Tape & Reel (TR) packaging for automated assembly. BMC1JY0240AN and BMC1JY0300AN are supplied in Cut Tape (CT) packaging. Both packaging formats are compatible with standard PCB assembly processes. Verify packaging compatibility with your assembly equipment and procurement requirements.
Q: Can I use BBGK00160808301Y00 (Pulse Electronics) in a design originally specified for LI0603D301R-00?
A: Yes. BBGK00160808301Y00 maintains exact impedance matching (300 Ohms @ 100 MHz) and 0603 package compatibility. It offers superior specifications with 500mA current rating (vs. 400mA) and 250mOhm DCR (vs. 350mOhm). Extended operating temperature range (-55°C to 125°C) provides additional environmental margin. This part is a suitable direct substitute with improved performance characteristics.
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