Würth Elektronik 782631101 Ferrite Bead 100 Ohm 0603 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 782631101 is a single-line signal ferrite bead in 0603 (1608 Metric) surface mount package, rated for 100 Ohms impedance at 100 MHz with 500mA maximum current and 200mOhm DC resistance. This component is classified as Active product status and carries AEC-Q200 automotive qualification. Ferrite beads are essential for EMI suppression in high-speed signal lines, and equivalent or substitute parts may be required due to inventory constraints, lead time considerations, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	100 Ohms
Current Rating (Max)	500mA
DC Resistance (Max)	200mOhm
Package / Case	0603 (1608 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Filter Type	Signal Line
Number of Lines	1
RoHS Status	ROHS3 Compliant
AEC-Q200 Rating	Yes

Substitute Part Grouping Explanation

Substitution eligibility for the 782631101 is determined by the following critical parameters:

Primary Substitution Criteria:

Package / Case: 0603 (1608 Metric) surface mount only
Mounting Type: Surface mount
Filter Type: Signal Line
Number of Lines: Single line (1)
Operating Temperature Range: -55°C ~ 125°C minimum
RoHS Status: ROHS3 Compliant
AEC-Q200 Qualification: Required

Electrical Parameter Tolerance:

Impedance @ 100 MHz: 100 Ohms ±20% (80–120 Ohms acceptable)
Current Rating (Max): 500mA minimum
DC Resistance (Max): 200mOhm maximum

Substitute parts are grouped into two categories based on impedance alignment:

Group 1 – Direct 100 Ohm Equivalents: Parts with 100 Ohms impedance at 100 MHz, matching the primary specification exactly.

Group 2 – 120 Ohm Parametric Equivalents: Parts with 120 Ohms impedance at 100 MHz, within the ±20% tolerance band, offering equivalent EMI suppression performance with potentially lower DC resistance characteristics.

Group 3 – 80 Ohm Parametric Equivalent: Parts with 80 Ohms impedance at 100 MHz, within the ±20% tolerance band, suitable for applications where lower impedance is acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Height (Max)	Product Status	AEC-Q200
782631101	Würth Elektronik	100 Ohms	500mA	200mOhm	0.039" (1.00mm)	Active	Yes
782631111	Würth Elektronik	100 Ohms	500mA	120mOhm	0.039" (1.00mm)	Active	Yes
782631131	Würth Elektronik	120 Ohms	500mA	120mOhm	0.039" (1.00mm)	Active	Yes
782632121	Würth Elektronik	120 Ohms	500mA	200mOhm	0.039" (1.00mm)	Active	Yes
BLM18AG121SH1D	Murata Electronics	120 Ohms	800mA	180mOhm	0.037" (0.95mm)	Active	Yes
BLM18AG121SZ1D	Murata Electronics	120 Ohms	800mA	180mOhm	0.037" (0.95mm)	Active	Yes
MMZ1608B121CTDH5	TDK Corporation	120 Ohms	600mA	150mOhm	0.030" (0.75mm)	Active	Yes
MMZ1608R121ATD25	TDK Corporation	120 Ohms	500mA	180mOhm	0.037" (0.95mm)	Active	Yes
MMZ1608S121ATD25	TDK Corporation	120 Ohms	500mA	150mOhm	0.037" (0.95mm)	Active	Yes
MMZ1608S800ATD25	TDK Corporation	80 Ohms	500mA	150mOhm	0.037" (0.95mm)	Active	Yes
MMZ1608Y121BTD25	TDK Corporation	120 Ohms	500mA	200mOhm	0.037" (0.95mm)	Active	Yes

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and AEC-Q200 qualification, ensuring compliance with automotive-grade reliability standards. Selection among equivalent parts should be based on the following provided specifications:

For Direct 100 Ohm Impedance Match: Würth Elektronik 782631111 provides identical impedance specification with reduced DC resistance (120mOhm vs. 200mOhm), maintaining the same 500mA current rating and 0603 package footprint.

For 120 Ohm Impedance Substitutes (±20% tolerance): Würth Elektronik 782631131 and 782632121 offer impedance within acceptable tolerance with improved or equivalent DC resistance characteristics. TDK MMZ1608 series (MMZ1608R121ATD25, MMZ1608S121ATD25, MMZ1608Y121BTD25) and Murata BLM18AG series (BLM18AG121SH1D, BLM18AG121SZ1D) provide 120 Ohm impedance with varying current ratings and DC resistance profiles. Murata parts support higher current ratings (800mA) with reduced height profiles (0.95mm vs. 1.00mm).

For 80 Ohm Impedance Substitute (±20% tolerance): TDK MMZ1608S800ATD25 provides lower impedance within tolerance range, suitable for applications where reduced impedance is acceptable.

All substitute parts comply with ROHS3 and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 120 Ohm ferrite bead for the 100 Ohm 782631101?

A: Yes. The 120 Ohm impedance falls within ±20% tolerance of the 100 Ohm specification and is electrically acceptable for signal line EMI suppression applications. All listed 120 Ohm substitutes (782631131, 782632121, BLM18AG121SH1D, BLM18AG121SZ1D, MMZ1608R121ATD25, MMZ1608S121ATD25, MMZ1608Y121BTD25) maintain the required 0603 package, surface mount configuration, and AEC-Q200 qualification.

Q: What is the difference between 782631101 and 782631111?

A: Both are Würth Elektronik 100 Ohm ferrite beads in 0603 package with identical impedance and current rating. The primary difference is DC resistance: 782631101 has 200mOhm maximum, while 782631111 has 120mOhm maximum. Lower DC resistance reduces power dissipation and heat generation in the component.

Q: Are Murata BLM18AG and TDK MMZ1608 series parts compatible with the 782631101 footprint?

A: Yes. All listed Murata and TDK substitutes use the 0603 (1608 Metric) surface mount package with identical land pattern dimensions (0.063" L x 0.032" W). Height variations (0.95mm vs. 1.00mm) do not affect PCB assembly compatibility. Verify clearance in your specific application if height-constrained.

Q: Can I use the 80 Ohm MMZ1608S800ATD25 as a substitute?

A: Yes. The 80 Ohm impedance is within ±20% tolerance of the 100 Ohm specification. This part is suitable if your application can accept lower impedance EMI suppression. Confirm that reduced impedance does not compromise your signal integrity or EMI performance requirements.

Q: Do all substitute parts have the same current rating as the 782631101?

A: No. The 782631101 is rated for 500mA maximum current. Most substitutes match this rating. However, Murata BLM18AG121SH1D and BLM18AG121SZ1D support 800mA, and TDK MMZ1608B121CTDH5 supports 600mA. Higher current ratings provide additional design margin but are not required for direct substitution.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. All listed substitute parts carry AEC-Q200 automotive qualification and ROHS3 compliance, matching the certification profile of the 782631101.

Q: What packaging formats are available for these substitutes?

A: The 782631101 is supplied in Tape & Reel (TR) format. Würth Elektronik substitutes (782631111, 782631131, 782632121) are also supplied in Tape & Reel. TDK MMZ1608B121CTDH5 is available in Cut Tape (CT) & Digi-Reel format. Murata and other TDK parts are supplied in Tape & Reel. Confirm packaging format availability with your supplier for production requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message