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Z0603C800ASMST Ferrite Bead 80 OHM 0603 Equivalent & Substitute Parts
Part Overview
The Z0603C800ASMST is a single-line ferrite bead manufactured by KEMET, designed for signal line filtering applications in 0603 (1608 Metric) surface mount packages. This component provides 80 Ohms of impedance at 100 MHz with a maximum current rating of 600mA and 100mOhm DC resistance. 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 @ Frequency | 80 Ohms @ 100 MHz |
| Current Rating (Max) | 600mA |
| DC Resistance (DCR) (Max) | 100mOhm |
| Package / Case | 0603 (1608 Metric) |
| Mounting Type | Surface Mount |
| Operating Temperature | -55°C ~ 125°C |
| Number of Lines | 1 |
| Filter Type | Signal Line |
| Height (Max) | 0.037" (0.95mm) |
| Size / Dimension | 0.063" L x 0.031" W (1.60mm x 0.80mm) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of ferrite beads is determined by electrical and mechanical compatibility across the following critical parameters:
Electrical Parameters:
- Impedance @ 100 MHz (primary selection criterion)
- Current Rating (Max)
- DC Resistance (DCR)
- Operating Temperature Range
Mechanical Parameters:
- Package / Case (0603 / 1608 Metric)
- Mounting Type (Surface Mount)
- Physical Dimensions and Height
- Number of Signal Lines (1)
Substitute parts are grouped into two categories based on impedance matching:
Category 1: Direct Impedance Match (80 Ohms @ 100 MHz) Parts with identical impedance specification allow direct replacement without circuit redesign. These include BBGK00160808800Y00, FB160808T-800Y-S-1, GZ1608U800CTF, MCB05-800-RC, and WLBD1608K2U800TP.
Category 2: Parametric Equivalent (68-70 Ohms @ 100 MHz) Parts with lower impedance values (68-70 Ohms) operate within the same frequency range and package but provide reduced impedance. These include BBGK00160808700Y00 and EMI0603R-68, along with FB160808T-680Y-S-1 which offers higher current capability (700mA).
All substitute parts maintain identical or compatible DC resistance, operating temperature range, package dimensions, and compliance certifications.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Impedance @ 100 MHz | Current Rating (Max) | DCR (Max) | Package | Operating Temp | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| Z0603C800ASMST | KEMET | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Obsolete | ROHS3 Compliant |
| BBGK00160808800Y00 | Pulse Electronics | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | ROHS3 Compliant |
| BBGK00160808700Y00 | Pulse Electronics | 70 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | ROHS3 Compliant |
| EMI0603R-68 | API Delevan Inc. | 68 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | ROHS3 Compliant |
| FB160808T-680Y-S-1 | Cal-Chip Electronics, Inc. | 68 Ohms | 700mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | RoHS Compliant |
| FB160808T-800Y-S-1 | Cal-Chip Electronics, Inc. | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | RoHS Compliant |
| GZ1608U800CTF | Shenzhen Sunlord Electronics Co., Ltd. | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | ROHS3 Compliant |
| MCB05-800-RC | Allied Components International | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | RoHS Compliant |
| WLBD1608K2U800TP | Walsin Technology Corporation | 80 Ohms | 600mA | 100mOhm | 0603 (1608 Metric) | -55°C ~ 125°C | Active | Not specified |
Engineering Selection Recommendations
Primary Substitutes (Direct Replacement - 80 Ohms @ 100 MHz):
BBGK00160808800Y00, FB160808T-800Y-S-1, GZ1608U800CTF, MCB05-800-RC, and WLBD1608K2U800TP are electrically and mechanically equivalent to the Z0603C800ASMST. All maintain 80 Ohms impedance at 100 MHz, 600mA current rating, and 100mOhm DC resistance. These parts are in active production status and carry current compliance certifications (ROHS3 or RoHS Compliant). Selection among these options is based on availability, packaging format (Tape & Reel), and supply chain considerations.
Secondary Substitutes (Parametric Equivalent - 68-70 Ohms @ 100 MHz):
BBGK00160808700Y00 and EMI0603R-68 provide lower impedance values (70 and 68 Ohms respectively) while maintaining all other electrical and mechanical specifications. These parts are suitable for applications where impedance tolerance permits operation at reduced filtering levels. FB160808T-680Y-S-1 offers the same 68 Ohm impedance with enhanced current capability (700mA versus 600mA), providing additional design margin in current-sensitive applications.
Compliance Considerations:
All substitute parts maintain ROHS3 or RoHS compliance status and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. Operating temperature range remains consistent across all options at -55°C to 125°C.
Frequently Asked Questions (FAQ)
Q: Can BBGK00160808700Y00 be used as a direct replacement for Z0603C800ASMST?
A: BBGK00160808700Y00 is a parametric equivalent with 70 Ohms impedance versus the original 80 Ohms. It maintains identical package dimensions, current rating, DC resistance, and operating temperature. Substitution is permissible only if circuit design tolerates the 10 Ohm impedance reduction at 100 MHz.
Q: What is the difference between FB160808T-800Y-S-1 and FB160808T-680Y-S-1?
A: Both parts are manufactured by Cal-Chip Electronics in 0603 package. FB160808T-800Y-S-1 matches the original 80 Ohm impedance with 600mA current rating. FB160808T-680Y-S-1 provides 68 Ohm impedance with higher 700mA current capability. Selection depends on impedance requirement and current margin needs.
Q: Are all substitute parts available in Tape & Reel packaging?
A: Yes, all listed substitute parts are specified with Tape & Reel (TR) packaging format, consistent with the original Z0603C800ASMST surface mount application requirements.
Q: Does the 0.01" height variation between MCB05-800-RC (0.94mm) and other parts (0.95mm) affect compatibility?
A: The 0.01mm height difference is within standard manufacturing tolerance for 0603 package components and does not affect PCB assembly compatibility or electrical performance.
Q: Which substitute offers the best current margin for high-current applications?
A: FB160808T-680Y-S-1 provides 700mA maximum current rating, representing a 100mA increase over the original 600mA specification. This part is suitable for applications requiring additional current headroom while accepting 68 Ohm impedance.
Q: Are there compliance differences between substitute options?
A: All substitutes carry current RoHS compliance certifications. BBGK00160808800Y00, EMI0603R-68, and GZ1608U800CTF specify ROHS3 compliance. FB160808T-800Y-S-1 and MCB05-800-RC specify RoHS compliance. WLBD1608K2U800TP does not specify RoHS status in provided documentation. Compliance requirements should be verified against specific application standards.
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