CPX3225A752D Equivalent & Substitute Parts

Part Overview

The CPX3225A752D is a 7.5 mF EDLC supercapacitor manufactured by Seiko Instruments, rated at 2.6 V with an ESR of 25 Ohm @ 1kHz. This component is packaged in a 1210 (3225 Metric) surface mount form factor with SMD tabs termination. The part is currently listed as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement.

Substiute Parts

CPX3225A752D

Seiko InstrumentsIn Stock: 12476CPX3225A752D Datasheet

Current PartRFQ

CPH3225A

Seiko InstrumentsIn Stock: 18320CPH3225A Datasheet

MFR RecommendedRFQ

CPM3225A-2K

Seiko InstrumentsIn Stock: 4912CPM3225A-2K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CPX3225A752D is determined by the following critical parameters:

Mechanical Compatibility: Package type (1210/3225 Metric), mounting method (Surface Mount), and termination style (SMD Tabs) must remain identical to ensure PCB-level compatibility without redesign.

Electrical Compatibility: Voltage rating and capacitance value define the functional role within the circuit. Substitute parts must operate within the same voltage class and provide equivalent or greater capacitance to maintain circuit performance.

Compliance & Availability: RoHS3 compliance and MSL rating ensure regulatory alignment and handling consistency. Active product status indicates ongoing manufacturer support and supply chain availability.

The two substitute parts listed (CPH3225A and CPM3225A-2K) share the identical 1210 (3225 Metric) package footprint and surface mount termination, enabling direct PCB-level substitution. Both are manufactured by Seiko Instruments and maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

CPH3225A: This substitute offers higher capacitance (11 mF vs. 7.5 mF) and elevated voltage rating (3.3 V vs. 2.6 V). Active product status ensures manufacturer support and supply availability. The identical 1210 (3225 Metric) footprint and 0.035" maximum seated height enable direct PCB substitution. Selection is appropriate for applications where increased capacitance and higher voltage margin are acceptable within circuit design parameters.

CPM3225A-2K: This substitute maintains the original 2.6 V voltage rating while providing increased capacitance (11.5 mF vs. 7.5 mF). Active product status confirms ongoing availability. The 1210 (3225 Metric) package footprint is identical; however, the maximum seated height is 0.039" (1.00mm) compared to 0.035" (0.90mm) for the original part. This 0.004" height difference must be evaluated against PCB clearance constraints. Selection is appropriate for applications requiring voltage-matched substitution with higher capacitance.

Both substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and handling consistency with the original component.

Frequently Asked Questions (FAQ)

Q: Can CPH3225A and CPM3225A-2K be used interchangeably with CPX3225A752D?

A: Both parts share the 1210 (3225 Metric) package footprint and surface mount termination, enabling PCB-level substitution. However, electrical parameters differ. CPH3225A operates at 3.3 V (vs. 2.6 V original), while CPM3225A-2K maintains 2.6 V rating. Circuit design must accommodate these voltage and capacitance differences.

Q: What is the height difference between the substitutes and the original part?

A: CPX3225A752D and CPH3225A both have a maximum seated height of 0.035" (0.90mm). CPM3225A-2K has a maximum seated height of 0.039" (1.00mm), representing a 0.004" increase. PCB clearance design must account for this difference.

Q: Are both substitute parts currently available?

A: Yes. CPH3225A has 18,279 pcs in stock, and CPM3225A-2K has 4,892 pcs in stock. Both are listed as active products with ongoing manufacturer support from Seiko Instruments.

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

A: Yes. Both CPH3225A and CPM3225A-2K are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original CPX3225A752D specifications.

Q: Which substitute should be selected for voltage-sensitive applications?

A: CPM3225A-2K maintains the original 2.6 V rating and is appropriate for circuits designed for this voltage class. CPH3225A operates at 3.3 V and is suitable only if circuit design permits higher voltage operation.