Z0402C431ESMST Ferrite Bead 430 Ohm 0402 Equivalent & Substitute Parts

Part Overview

The Z0402C431ESMST is a signal line ferrite bead manufactured by KEMET, designed for electromagnetic interference (EMI) suppression in 0402 (1005 Metric) surface mount applications. This component operates at 430 Ohms impedance at 100 MHz with a maximum current rating of 350mA and DC resistance of 500mOhm. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

Z0402C431ESMST

KEMETIn Stock: 10490Z0402C431ESMST Datasheet

Current PartRFQ

74269243461

Würth ElektronikIn Stock: 8761374269243461 Datasheet

Parametric EquivalentRFQ

BMC1EY0430AN

TE Connectivity Passive ProductIn Stock: 20807BMC1EY0430AN Datasheet

Parametric EquivalentRFQ

FB100505T-431Y-S

Cal-Chip Electronics, Inc.In Stock: 100950FB100505T-431Y-S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Z0402C431ESMST ferrite bead is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Impedance at 100 MHz: 430 Ohms (exact match required)
• Current Rating: 350mA minimum
• DC Resistance: 500mOhm maximum
• Package: 0402 (1005 Metric) surface mount
• Filter Type: Signal Line, single line configuration
• Operating Temperature: -55°C to 125°C minimum range
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Factors:

• RoHS3 compliance for regulatory alignment
• REACH unaffected status where applicable
• Physical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)

Parts meeting all primary criteria are classified as direct parametric equivalents. The substitute part 74269243461 (Würth Elektronik) operates at 460 Ohms impedance and therefore represents a near-equivalent alternative with slightly elevated impedance characteristics and improved current handling capacity (500mA versus 350mA).

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

BMC1EY0430AN (TE Connectivity Passive Product) and FB100505T-431Y-S (Cal-Chip Electronics, Inc.) are direct parametric equivalents to the Z0402C431ESMST. Both parts maintain identical impedance (430 Ohms @ 100 MHz), current rating (350mA), and DC resistance (500mOhm) specifications. Both are active products with ROHS3 compliance and MSL 1 rating. The BMC1EY0430AN is supplied in Cut Tape (CT) packaging, matching the original part's packaging format. The FB100505T-431Y-S is supplied in Tape & Reel (TR) format with higher inventory availability (100,899 pieces).

Near-Equivalent Alternative:

74269243461 (Würth Elektronik WE-TMSB series) operates at 460 Ohms impedance with enhanced specifications: 500mA current rating and 350mOhm DC resistance. This part is suitable for applications where slightly elevated impedance and improved current handling capacity are acceptable. The 0.022" (0.55mm) maximum height matches the original part's profile. This part is active with ROHS3 compliance.

Selection Basis:

All substitute parts meet the mandatory electrical and mechanical parameters for 0402 surface mount signal line ferrite bead applications. Selection between direct equivalents should be based on packaging requirements (Cut Tape versus Tape & Reel), inventory availability, and lead time considerations. The near-equivalent 74269243461 is suitable only for applications where the 30 Ohm impedance increase and enhanced current capacity do not conflict with circuit design specifications.

Frequently Asked Questions (FAQ)

Q: Can the 74269243461 (460 Ohms) be used as a direct replacement for the Z0402C431ESMST (430 Ohms)?

A: The 74269243461 is a near-equivalent alternative, not a direct replacement. The 30 Ohm impedance difference (460 Ohms versus 430 Ohms) may affect EMI filtering performance depending on circuit requirements. This part is suitable only when the higher impedance value is acceptable for the application.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies components in individual strips, suitable for lower-volume applications and manual assembly. Tape & Reel packaging supplies components on continuous reels, optimized for high-volume automated assembly. Both formats contain identical components; packaging selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts RoHS compliant?

A: BMC1EY0430AN, FB100505T-431Y-S, and 74269243461 are all RoHS compliant. BMC1EY0430AN and 74269243461 carry ROHS3 certification. FB100505T-431Y-S carries RoHS compliance certification. All parts meet regulatory requirements for lead-free manufacturing.

Q: Do the substitute parts have the same physical dimensions as the original Z0402C431ESMST?

A: All substitute parts share the same length and width (0.039" L x 0.020" W / 1.00mm x 0.50mm). The Z0402C431ESMST and 74269243461 have a maximum height of 0.022" (0.55mm). BMC1EY0430AN and FB100505T-431Y-S have a maximum height of 0.024" (0.60mm). This 0.002" (0.05mm) height difference is within typical PCB assembly tolerances for 0402 components.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure controls. All substitute parts carry MSL 1 rating, matching the original part's moisture sensitivity classification.

Q: Which substitute part should be selected for new production designs?

A: For new production designs, BMC1EY0430AN or FB100505T-431Y-S are recommended as direct parametric equivalents. Both are active products with identical electrical specifications to the original part. Selection between these two should be based on packaging format preference (Cut Tape versus Tape & Reel) and supplier availability.