ECK-DNA221MB Equivalent & Substitute Parts

Part Overview

The ECK-DNA221MB is a 220 pF ceramic capacitor rated for 250VAC with Y5P temperature coefficient, manufactured by Panasonic Electronic Components. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing applications requiring 220 pF capacitance in safety-rated circuits. The radial, disc package configuration with through-hole mounting remains standard across available alternatives.

Substiute Parts

ECK-DNA221MB

Panasonic Electronic ComponentsIn Stock: 1033ECK-DNA221MB Datasheet

Current PartRFQ

DE1B3RB221KA4BR01F

Murata ElectronicsIn Stock: 1132DE1B3RB221KA4BR01F Datasheet

SimilarRFQ

DE1B3RB221KJ4BR01F

Murata ElectronicsIn Stock: 924DE1B3RB221KJ4BR01F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECK-DNA221MB are qualified based on the following criteria:

• Capacitance Match: 220 pF nominal value
• Voltage Rating: Equal to or greater than 250VAC (substitutes rated 500VAC exceed minimum requirement)
• Temperature Coefficient: B-class or equivalent (acceptable for safety applications)
• Mounting Configuration: Through-hole radial disc package maintained
• Lead Spacing: 0.394" (10.00mm) standard maintained
• Safety Ratings: X1, Y1 compliance required for safety circuit applications
• Package Compatibility: Physical dimensions must accommodate existing PCB layouts

The substitute parts DE1B3RB221KA4BR01F and DE1B3RB221KJ4BR01F, both manufactured by Murata Electronics, meet these substitution criteria with enhanced voltage ratings and improved temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

Both Murata substitute parts are qualified replacements for the obsolete ECK-DNA221MB based on electrical and mechanical compatibility. The Murata DE1 series components offer the following advantages:

• Active Product Status: Both DE1B3RB221KA4BR01F and DE1B3RB221KJ4BR01F are active products with confirmed inventory availability, ensuring long-term supply continuity.
• Enhanced Voltage Margin: 500VAC rating provides 2× voltage headroom over the original 250VAC specification, improving circuit reliability in safety applications.
• Improved Tolerance: ±10% tolerance compared to ±20% original specification reduces capacitance variation in critical circuits.
• Extended Temperature Range: -40°C ~ 125°C operating range exceeds the original -25°C ~ 85°C specification.
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status meet current environmental and regulatory requirements.

Both substitute parts maintain identical lead spacing (10.00mm) and safety ratings (X1, Y1), ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can DE1B3RB221KA4BR01F and DE1B3RB221KJ4BR01F be used interchangeably as substitutes for ECK-DNA221MB?

A: Yes. Both Murata parts meet the electrical and mechanical substitution criteria. They share identical capacitance (220 pF), lead spacing (10.00mm), package type (radial disc), and safety ratings (X1, Y1). The primary difference between the two Murata parts is internal construction; both are functionally equivalent for this application.

Q: What are the key differences between the original ECK-DNA221MB and the substitute parts?

A: The substitute parts offer three primary improvements: (1) higher voltage rating (500VAC vs. 250VAC), (2) tighter tolerance (±10% vs. ±20%), and (3) extended operating temperature range (-40°C ~ 125°C vs. -25°C ~ 85°C). All three parts maintain the same 220 pF capacitance, lead spacing, and safety ratings.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: The substitute parts maintain the standard 0.394" (10.00mm) lead spacing required for through-hole mounting. However, the Murata parts have smaller body dimensions (0.236" diameter vs. 0.433" diameter for the original). Verify that the reduced body size does not conflict with component placement constraints or clearance requirements on your specific PCB layout.

Q: Do the substitute parts meet safety and regulatory requirements?

A: Yes. Both Murata substitute parts maintain X1, Y1 safety ratings identical to the original ECK-DNA221MB. Additionally, the Murata parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations. The original Panasonic part is RoHS non-compliant.

Q: What is the difference between DE1B3RB221KA4BR01F and DE1B3RB221KJ4BR01F?

A: Both parts are electrically and mechanically identical with 220 pF capacitance, 500VAC rating, ±10% tolerance, and B temperature coefficient. The designation difference (KA vs. KJ) reflects internal construction variations within the Murata DE1 series. Both are functionally equivalent for ECK-DNA221MB substitution.