DMM4S33K-F Equivalent & Substitute Parts Reference

Part Overview

The DMM4S33K-F is a 0.033 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 400V DC voltage rating and ±10% tolerance. This radial through-hole component is designed for general-purpose applications requiring polyester metallized film construction. The part is currently in active production status with 1084 units in stock.

Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, dielectric material) and mechanical compatibility (mounting type, package case, lead spacing, termination style). Alternative sources and upgraded tolerance variants are available from EPCOS-TDK Electronics and Nichicon.

Substiute Parts

DMM4S33K-F

Cornell Dubilier Electronics (CDE)In Stock: 1193DMM4S33K-F Datasheet

Current PartRFQ

DME4S33K-F

Cornell Dubilier Electronics (CDE)In Stock: 4153DME4S33K-F Datasheet

SimilarRFQ

B32521C6333K

EPCOS - TDK ElectronicsIn Stock: 6014B32521C6333K Datasheet

DirectRFQ

B32521C6333J

EPCOS - TDK ElectronicsIn Stock: 4994B32521C6333J Datasheet

UpgradeRFQ

QXK2G333KTPTZH

NichiconIn Stock: 1500QXK2G333KTPTZH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DMM4S33K-F is determined by the following criteria:

Primary Matching Parameters:

• Capacitance value: 0.033 µF (exact match required)
• Voltage rating: 400V DC minimum
• Dielectric type: Polyester, Metallized film
• Mounting: Through-hole radial configuration
• Termination: PC pins for PCB insertion

Secondary Compatibility Parameters:

• Tolerance: ±10% or tighter (±5% acceptable as upgrade)
• Operating temperature: -55°C to 125°C or equivalent range
• Lead spacing: 0.394" (10.00mm) preferred; 0.295" (7.50mm) acceptable with PCB layout verification
• Physical dimensions: Radial package footprint compatibility

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status required

Parts are grouped into three categories: direct equivalents (identical specifications), similar alternatives (same electrical performance with minor dimensional variations), and upgraded variants (tighter tolerance specifications).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - DME4S33K-F (Cornell Dubilier Electronics)

The DME4S33K-F is a direct electrical equivalent with identical capacitance, voltage rating, tolerance, and operating temperature range. Both parts are manufactured by Cornell Dubilier Electronics and maintain active production status. The primary difference is lead spacing (0.295" versus 0.394"), which requires PCB layout verification before substitution. This part is suitable for new designs and offers higher inventory availability (4065 units in stock).

Direct Equivalent - QXK2G333KTPTZH (Nichicon)

The QXK2G333KTPTZH from Nichicon matches all critical electrical parameters and maintains active product status. Operating temperature range is narrower (-40°C to 105°C versus -55°C to 125°C), which is acceptable for applications not requiring extended low-temperature performance. Lead spacing is 0.413" (10.50mm), compatible with standard 10mm pitch PCB layouts. This part is suitable for new designs.

Upgraded Tolerance Variant - B32521C6333J (EPCOS - TDK Electronics)

The B32521C6333J offers tighter ±5% tolerance compared to the ±10% specification of the main part. Electrical and mechanical parameters are otherwise identical. This part carries "Not For New Designs" status, limiting its use to legacy system maintenance or replacement applications. Lead spacing matches at 0.394" (10.00mm).

Legacy Equivalent - B32521C6333K (EPCOS - TDK Electronics)

The B32521C6333K provides electrical equivalence with matching capacitance, voltage rating, and tolerance. This part is designated "Not For New Designs" and should be used only for direct replacement in existing systems. Lead spacing matches at 0.394" (10.00mm).

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original DMM4S33K-F specification.

Frequently Asked Questions (FAQ)

Q: Can DME4S33K-F replace DMM4S33K-F directly on the PCB?

A: Electrical substitution is valid. However, the lead spacing differs (0.295" versus 0.394"). Verify PCB hole spacing before installation. If the PCB is designed for 10mm pitch, the DME4S33K-F will not fit without modification.

Q: What is the difference between B32521C6333J and B32521C6333K?

A: Both are EPCOS-TDK parts with identical electrical specifications. B32521C6333J has ±5% tolerance (tighter), while B32521C6333K has ±10% tolerance (matching the main part). Both are marked "Not For New Designs."

Q: Is QXK2G333KTPTZH suitable for applications requiring -55°C operation?

A: No. The QXK2G333KTPTZH operating range is -40°C to 105°C. For applications requiring -55°C minimum temperature, use DMM4S33K-F, DME4S33K-F, or the EPCOS variants (B32521C6333K/J).

Q: Why are some substitute parts marked "Not For New Designs"?

A: EPCOS-TDK B3252* series parts are legacy products. They remain available for replacement in existing systems but are not recommended for new product development. Use active-status alternatives (DME4S33K-F or QXK2G333KTPTZH) for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (DME4S33K-F, B32521C6333K, B32521C6333J, QXK2G333KTPTZH) are ROHS3 compliant and REACH unaffected, matching the compliance status of DMM4S33K-F.

Q: What is the lead spacing requirement for PCB compatibility?

A: Standard radial film capacitor PCBs use 10mm (0.394") lead spacing. DME4S33K-F uses 7.50mm spacing and requires PCB verification. QXK2G333KTPTZH uses 10.50mm spacing, compatible with standard 10mm pitch layouts with minor tolerance accommodation.