ECQ-B2124JF Equivalent & Substitute Parts

Part Overview

The ECQ-B2124JF is a 0.12 µF film capacitor rated for 200V DC with ±5% tolerance, manufactured by Panasonic Electronic Components in the ECQ-B(F) series. This component features polyester dielectric material in a radial through-hole package and is designed for general-purpose applications across an operating temperature range of -40°C to 105°C. The ECQ-B2124JF is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Capacitance	0.12 µF
Voltage Rating (DC)	200V
Tolerance	±5%
Dielectric Material	Polyester
Mounting Type	Through Hole
Package Type	Radial
Operating Temperature Range	-40°C to 105°C
Termination	PC Pins

Substitute Part Grouping Explanation

Substitute parts for the ECQ-B2124JF are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

Capacitance value: 0.12 µF (exact match required)
Tolerance: ±5% (exact match required)
Voltage Rating (DC): Equal to or greater than 200V
Dielectric Material: Polyester or Polyester Metallized (functionally compatible)
Operating Temperature Range: Must encompass or exceed -40°C to 105°C

Mechanical Compatibility Criteria:

Mounting Type: Through Hole (required)
Package Type: Radial (required)
Termination: PC Pins (required)

Both substitute parts meet these criteria while offering improved availability and active product status compared to the obsolete ECQ-B2124JF.

Parameter Comparison

Parameter	ECQ-B2124JF (Main)	ECQ-E2124JF (Substitute)	160124J250D-F (Substitute)
Manufacturer	Panasonic Electronic Components	Panasonic Electronic Components	Cornell Dubilier Electronics (CDE)
Capacitance	0.12 µF	0.12 µF	0.12 µF
Tolerance	±5%	±5%	±5%
Voltage Rating (DC)	200V	250V	250V
Voltage Rating (AC)	—	150V	160V
Dielectric Material	Polyester	Polyester, Metallized	Polyester, Metallized
Operating Temperature Range	-40°C to 105°C	-40°C to 105°C	-55°C to 105°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial	Radial	Radial
Size / Dimension (L x W)	19.00mm x 6.50mm	10.30mm x 6.00mm	13.00mm x 6.00mm
Height - Seated (Max)	17.00mm	10.00mm	12.00mm
Lead Spacing	15.00mm	7.50mm	10.00mm
Termination	PC Pins	PC Pins	PC Pins
Product Status	Obsolete	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant
REACH Status	—	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

ECQ-E2124JF (Panasonic): This substitute is the primary equivalent for the ECQ-B2124JF. It maintains identical capacitance, tolerance, and operating temperature specifications while providing a higher DC voltage rating of 250V. The ECQ-E2124JF is manufactured by the same supplier as the original part, carries active product status, and is ROHS3 compliant and REACH unaffected. The reduced physical dimensions (10.30mm x 6.00mm versus 19.00mm x 6.50mm) and shorter lead spacing (7.50mm versus 15.00mm) require PCB layout verification for mechanical fit.

160124J250D-F (Cornell Dubilier Electronics): This substitute provides equivalent electrical performance with a 250V DC rating and extended operating temperature range (-55°C to 105°C). The part is ROHS3 compliant and REACH unaffected. Physical dimensions (13.00mm x 6.00mm) and lead spacing (10.00mm) fall between the original and the Panasonic substitute, offering a compromise for designs with moderate space constraints. Selection of this alternative introduces a secondary manufacturer into the supply chain.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E2124JF be used as a direct replacement for the ECQ-B2124JF?

A: The ECQ-E2124JF is electrically compatible as a substitute. Both parts share identical capacitance (0.12 µF), tolerance (±5%), and operating temperature range (-40°C to 105°C). The ECQ-E2124JF provides higher voltage rating (250V versus 200V). Physical dimensions differ significantly; PCB layout must accommodate the smaller footprint (10.30mm x 6.00mm) and reduced lead spacing (7.50mm).

Q: What are the key differences between the two substitute parts?

A: Both ECQ-E2124JF and 160124J250D-F meet the electrical requirements of the ECQ-B2124JF. The ECQ-E2124JF is smaller (10.30mm x 6.00mm, 7.50mm lead spacing) and maintains Panasonic supply continuity. The 160124J250D-F is larger (13.00mm x 6.00mm, 10.00mm lead spacing) and offers an extended lower temperature limit (-55°C versus -40°C). Both are active products with current compliance certifications.

Q: Are there any mechanical compatibility concerns when substituting these parts?

A: Yes. The original ECQ-B2124JF measures 19.00mm x 6.50mm with 15.00mm lead spacing. The ECQ-E2124JF is significantly smaller (10.30mm x 6.00mm, 7.50mm spacing), while the 160124J250D-F is intermediate (13.00mm x 6.00mm, 10.00mm spacing). PCB hole patterns and component placement must be verified before substitution. Smaller lead spacing may require PCB redesign.

Q: Why is the ECQ-B2124JF classified as obsolete?

A: The ECQ-B2124JF is listed as obsolete by the manufacturer. Active alternatives with equivalent or superior electrical specifications are available, including the ECQ-E2124JF from the same manufacturer and the 160124J250D-F from Cornell Dubilier Electronics.

Q: Do the substitute parts have the same compliance certifications?

A: Both substitute parts are ROHS3 compliant and REACH unaffected. The original ECQ-B2124JF compliance status is not specified in the provided data. Both substitutes meet current regulatory requirements for electronic component manufacturing and use.

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