Request Quote
(Ships tomorrow)
CIS10P121AC Ferrite Bead 120 OHM 0603 Equivalent & Substitute Parts
Part Overview
The CIS10P121AC is a power line ferrite bead manufactured by Samsung Electro-Mechanics, designed for electromagnetic interference (EMI) suppression in 0603 (1608 Metric) surface mount applications. This component provides 120 Ohms impedance at 100 MHz with a maximum current rating of 3A and 30mOhm DC resistance. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Active alternatives from multiple manufacturers offer identical or superior electrical performance within the same package footprint.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Impedance @ 100 MHz | 120 | Ohms |
| Current Rating (Maximum) | 3 | A |
| DC Resistance (Maximum) | 30 | mOhm |
| Package / Case | 0603 (1608 Metric) | — |
| Number of Lines | 1 | — |
| Operating Temperature Range | -55 to 125 | °C |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the CIS10P121AC are classified into two categories based on electrical parameter alignment:
Direct Equivalent (Identical Electrical Parameters): Parts matching all critical electrical specifications: 120 Ohms @ 100 MHz, 3A maximum current, and 30mOhm DC resistance. These parts are functionally interchangeable with the original component.
Parametric Equivalent (Acceptable Electrical Variations): Parts with minor deviations in impedance (±10 Ohms), current rating (≥3A), or DC resistance (≤30mOhm) that remain suitable for the same application circuit. These parts satisfy the functional requirements while offering alternative sourcing options.
Substitution Criteria:
- Impedance @ 100 MHz: 110–120 Ohms (±10 Ohm tolerance acceptable)
- Current Rating: Minimum 3A (higher ratings acceptable)
- DC Resistance: Maximum 30mOhm (lower values acceptable)
- Package: 0603 (1608 Metric) surface mount only
- Operating Temperature: -55°C to 125°C minimum
- Compliance: ROHS3 and REACH requirements maintained
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Impedance @ 100 MHz (Ohms) | Current Rating (A) | DC Resistance (mOhm) | Height (mm) | Product Status | Packaging |
|---|---|---|---|---|---|---|---|
| CIS10P121AC | Samsung Electro-Mechanics | 120 | 3 | 30 | 0.95 | Obsolete | Cut Tape (CT) & Digi-Reel® |
| BLM18KG121TN1D | Murata Electronics | 120 | 3 | 30 | 0.75 | Active | Cut Tape (CT) & Digi-Reel® |
| BBUP00160805121Y00 | Pulse Electronics | 120 | 3 | 25 | 0.65 | Active | Tape & Reel (TR) |
| BBUP00160808121Y00 | Pulse Electronics | 120 | 3 | 30 | 0.95 | Active | Tape & Reel (TR) |
| BLM18SG121TN1D | Murata Electronics | 120 | 3 | 25 | 0.65 | Active | Cut Tape (CT) & Digi-Reel® |
| 74279228111 | Würth Elektronik | 110 | 4.1 | 20 | 1.00 | Active | Cut Tape (CT) & Digi-Reel® |
| ACML-0603U-101B-T | Abracon LLC | 100 | 3 | 30 | 0.95 | Active | Tape & Reel (TR) |
| BBUP00160805101Y00 | Pulse Electronics | 100 | 3 | 25 | 0.65 | Active | Tape & Reel (TR) |
| BBUP00160808101Y00 | Pulse Electronics | 100 | 3 | 30 | 0.95 | Active | Tape & Reel (TR) |
| BLM18KG101TN1D | Murata Electronics | 100 | 3 | 30 | 0.75 | Active | Cut Tape (CT) & Digi-Reel® |
| BLM18SP101SN1D | Murata Electronics | 100 | 3.7 | 22 | 0.95 | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Direct Equivalent: BLM18KG121TN1D (Murata Electronics) is the recommended direct substitute. This part maintains identical electrical specifications (120 Ohms @ 100 MHz, 3A, 30mOhm) and is actively manufactured. It offers reduced height (0.75mm vs. 0.95mm), providing potential PCB layout advantages. Both parts are ROHS3 compliant with MSL 1 rating.
Secondary Direct Equivalent: BBUP00160808121Y00 (Pulse Electronics) provides identical electrical performance with matching height profile (0.95mm). This part offers the highest inventory availability (72,531 pieces) among active substitutes, supporting supply chain continuity.
Parametric Alternatives for Lower Impedance Applications: When circuit design permits impedance reduction to 100 Ohms @ 100 MHz, BLM18KG101TN1D, BBUP00160808101Y00, and ACML-0603U-101B-T are suitable alternatives. These parts maintain 3A current rating and 30mOhm maximum DC resistance.
Higher Performance Option: BLM18SG121TN1D (Murata Electronics) matches the 120 Ohm impedance specification while offering reduced DC resistance (25mOhm) and lower profile (0.65mm). This part is suitable for applications requiring improved thermal performance or space-constrained layouts.
Compliance Verification: All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating. No additional qualification testing is required based on provided compliance certifications.
Frequently Asked Questions (FAQ)
Q: Can BLM18KG121TN1D directly replace CIS10P121AC without circuit modification?
A: Yes. BLM18KG121TN1D is a direct electrical equivalent with identical impedance (120 Ohms @ 100 MHz), current rating (3A), and DC resistance (30mOhm). The 0603 package footprint is identical. No circuit changes are required.
Q: What is the difference between "Direct Equivalent" and "Parametric Equivalent" parts?
A: Direct equivalents match all electrical specifications exactly. Parametric equivalents have minor variations (such as 100 Ohms vs. 120 Ohms impedance) that remain within acceptable operating ranges for the application. Selection depends on circuit impedance requirements.
Q: Are there height differences between substitute parts, and do they affect PCB assembly?
A: Yes. Heights range from 0.65mm to 1.00mm. Lower-profile parts (0.65mm) may offer advantages in space-constrained designs. Standard 0603 reflow soldering processes accommodate this height variation without modification.
Q: Which substitute offers the best inventory availability?
A: BBUP00160808121Y00 (Pulse Electronics) has the highest stock level at 72,531 pieces, followed by BLM18SG121TN1D (Murata) at 95,100 pieces. Both are actively manufactured and support immediate procurement.
Q: Do all substitutes maintain the same compliance certifications?
A: Yes. All listed substitutes are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity) rating. Compliance documentation is equivalent across all parts.
Q: Can I use a 100 Ohm ferrite bead instead of 120 Ohms?
A: This depends on circuit design. If the application specifies 120 Ohms for EMI suppression at a specific frequency, substituting 100 Ohms will reduce filtering effectiveness. Consult circuit design documentation to confirm impedance tolerance.
Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?
A: Both are surface mount formats suitable for automated assembly. Cut Tape is supplied in smaller quantities on carrier tape. Tape & Reel is supplied on continuous reel for high-volume production. Electrical performance is identical; selection depends on production volume and handling equipment.
Q: Is the Würth Elektronik 74279228111 (110 Ohms) suitable as a substitute?
A: 74279228111 is a parametric equivalent with 110 Ohms impedance (within ±10 Ohm tolerance) and superior current rating (4.1A vs. 3A). It is suitable only if circuit design permits ±10 Ohm impedance variation. Verify with circuit documentation before selection.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts