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MU3261-101Y Ferrite Bead 100 Ohm 1206 Equivalent & Substitute Parts
Part Overview
The MU3261-101Y is a 1206 surface mount ferrite bead manufactured by Bourns Inc., rated at 100 Ohms impedance at 100 MHz with a maximum current rating of 500mA and 150mOhm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and meets ROHS3 compliance requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Impedance @ 100 MHz | 100 Ohms |
| Package / Case | 1206 (3216 Metric) |
| Current Rating (Max) | 500mA |
| DC Resistance (DCR) (Max) | 150mOhm |
| Operating Temperature | -55°C ~ 125°C |
| Mounting Type | Surface Mount |
| Size / Dimension | 0.126" L x 0.063" W (3.20mm x 1.60mm) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the MU3261-101Y is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Impedance @ 100 MHz: 100 Ohms (exact match required)
- Package / Case: 1206 (3216 Metric) (exact match required)
- Current Rating (Max): minimum 500mA
- DC Resistance (DCR) (Max): maximum 150mOhm
- Operating Temperature: minimum -55°C to 125°C coverage
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant or equivalent
Secondary Substitution Criteria (Impedance Variants): Parts with impedance values of 90 Ohms, 120 Ohms, or 80 Ohms at 100 MHz in the same 1206 package are listed as parametric equivalents when the application permits impedance tolerance. These variants maintain identical mechanical compatibility and thermal operating range.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Impedance @ 100 MHz | Current Rating (Max) | DC Resistance (Max) | Product Status | Operating Temperature | Height (Max) |
|---|---|---|---|---|---|---|---|
| MU3261-101Y | Bourns Inc. | 100 Ohms | 500mA | 150mOhm | Obsolete | -55°C ~ 125°C | 0.051" (1.30mm) |
| HI1206N101R-10 | Laird-Signal Integrity Products | 100 Ohms | 3A | 35mOhm | Active | -40°C ~ 125°C | 0.043" (1.10mm) |
| BBBK00321611101Y00 | Pulse Electronics | 100 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| MU3261-121Y | Bourns Inc. | 120 Ohms | 900mA | 150mOhm | Obsolete | -55°C ~ 125°C | 0.051" (1.30mm) |
| BBBK00321611121Y00 | Pulse Electronics | 120 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| BBBK00321611800Y00 | Pulse Electronics | 80 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| BBBK00321611900Y00 | Pulse Electronics | 90 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| EMI1206R-120 | API Delevan Inc. | 120 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| EMI1206R-90 | API Delevan Inc. | 90 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| FB04YTYN121 | Stackpole Electronics Inc | 120 Ohms | 500mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
| FB321611T-121Y-S-1 | Cal-Chip Electronics, Inc. | 120 Ohms | 600mA | 150mOhm | Active | -55°C ~ 125°C | 0.051" (1.30mm) |
Engineering Selection Recommendations
Direct Equivalent (100 Ohm @ 100 MHz):
BBBK00321611101Y00 from Pulse Electronics is the primary direct equivalent. It matches the MU3261-101Y in impedance, current rating, DC resistance, operating temperature range, and package dimensions. The part is active in production status, ensuring long-term availability. Both components meet ROHS3 compliance and carry MSL 1 (Unlimited) moisture sensitivity ratings.
HI1206N101R-10 from Laird-Signal Integrity Products provides an alternative 100 Ohm equivalent with superior electrical performance: 3A current rating versus 500mA, and 35mOhm DC resistance versus 150mOhm. However, the operating temperature range is -40°C to 125°C, which does not extend to -55°C. Height is reduced to 0.043" (1.10mm). This part is suitable for applications where the narrower temperature range is acceptable and enhanced current handling is beneficial.
Parametric Equivalents (Impedance Variants):
When circuit design permits impedance tolerance, the following active parts provide substitution options:
- 120 Ohm variants: MU3261-121Y (Bourns, obsolete), BBBK00321611121Y00 (Pulse, active), EMI1206R-120 (API Delevan, active), FB04YTYN121 (Stackpole, active), FB321611T-121Y-S-1 (Cal-Chip, active)
- 90 Ohm variants: BBBK00321611900Y00 (Pulse, active), EMI1206R-90 (API Delevan, active)
- 80 Ohm variant: BBBK00321611800Y00 (Pulse, active)
All parametric equivalents maintain the 1206 package, surface mount configuration, and -55°C to 125°C operating temperature range. Current ratings and DC resistance specifications remain within acceptable limits for signal line and power line applications.
Frequently Asked Questions (FAQ)
Q: Can I use HI1206N101R-10 as a direct replacement for MU3261-101Y?
A: HI1206N101R-10 matches the 100 Ohm impedance and 1206 package, but the operating temperature range is -40°C to 125°C instead of -55°C to 125°C. Use this part only if your application does not require operation below -40°C. The superior current rating (3A vs 500mA) and lower DC resistance (35mOhm vs 150mOhm) are additional benefits for compatible designs.
Q: What is the difference between the main part and parametric equivalents with different impedance values?
A: Parametric equivalents maintain identical mechanical compatibility (1206 package, surface mount, same dimensions) and thermal operating range (-55°C to 125°C) but differ in impedance at 100 MHz. Selection depends on circuit requirements. If your design specifies 100 Ohms impedance, use BBBK00321611101Y00 or HI1206N101R-10. If impedance tolerance exists in your design, 80, 90, or 120 Ohm variants are acceptable alternatives.
Q: Why is MU3261-101Y listed as obsolete?
A: The MU3261-101Y is classified as obsolete by Bourns Inc. Active production alternatives from other manufacturers ensure continued availability for designs requiring this component specification.
Q: Are all substitute parts ROHS3 compliant?
A: BBBK00321611101Y00, BBBK00321611121Y00, BBBK00321611800Y00, BBBK00321611900Y00, EMI1206R-120, EMI1206R-90, and FB321611T-121Y-S-1 are confirmed ROHS3 compliant. FB04YTYN121 compliance status is not specified in available data. Verify compliance documentation for your specific application requirements.
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 DC and low frequencies. The MU3261-101Y specifies 150mOhm maximum. HI1206N101R-10 offers superior performance at 35mOhm, resulting in lower power dissipation. All other listed equivalents maintain the 150mOhm specification, ensuring consistent thermal and electrical behavior.
Q: Can I substitute a 120 Ohm ferrite bead for a 100 Ohm application?
A: Substitution depends on circuit design tolerance. If the application permits ±20% impedance variation or higher, 120 Ohm parts are acceptable. Verify impedance requirements in your schematic and EMI filtering specifications before substitution.
Q: What packaging options are available for these ferrite beads?
A: All listed parts use 1206 (3216 Metric) surface mount packages. Packaging formats vary: Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), or unspecified. Confirm packaging compatibility with your assembly process requirements.
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