167333K400C-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 167333K400C-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 utilizes polyester metallized dielectric technology and operates across a temperature range of -55°C to 125°C. The part is classified as Active product status with full ROHS3 compliance and REACH unaffected certification.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design flexibility permits alternative manufacturers meeting identical electrical specifications. The parts listed below maintain electrical equivalence while offering different physical packaging configurations and availability profiles.

Substiute Parts

167333K400C-F

Cornell Dubilier Electronics (CDE)In Stock: 1044167333K400C-F Datasheet

Current PartRFQ

DME4S33K-F

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

DirectRFQ

B32521C6333K

EPCOS - TDK ElectronicsIn Stock: 6014B32521C6333K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 167333K400C-F is determined by strict equivalence across the following critical parameters: capacitance value (0.033 µF), tolerance (±10%), DC voltage rating (400V), AC voltage rating (200V), dielectric material composition (polyester metallized), operating temperature range (-55°C to 125°C), mounting classification (through hole radial), and termination type (PC pins).

Physical dimensions, lead spacing, and height specifications are secondary considerations that do not prevent electrical substitution but may require PCB layout verification. Compliance certifications including ROHS3 and REACH status must be maintained across all substitute selections.

Two substitute parts meet these criteria:

DME4S33K-F (Cornell Dubilier Electronics) - Direct electrical equivalent with identical capacitance, tolerance, voltage ratings, dielectric material, temperature range, and termination. Physical dimensions differ slightly (10.30mm L x 6.00mm W versus 10.50mm L x 5.00mm W) with reduced lead spacing tolerance variation.

B32521C6333K (EPCOS - TDK Electronics) - Electrical equivalent meeting all core parameters with identical capacitance, tolerance, voltage ratings, and temperature range. Dielectric composition specified as polyester PET metallized stacked configuration. Physical dimensions and lead spacing differ significantly (13.00mm L x 4.00mm W, 10.00mm lead spacing). Product status classified as Not For New Designs.

Parameter Comparison

Engineering Selection Recommendations

DME4S33K-F Selection Criteria: This substitute is recommended for applications requiring direct electrical equivalence with minimal design modification. Both parts originate from the same manufacturer (Cornell Dubilier Electronics), ensuring consistent quality standards and manufacturing processes. The DME4S33K-F maintains Active product status, confirming ongoing manufacturer support and long-term availability. Physical dimensions are comparable with only minor variations in length (0.20mm difference) and width (1.00mm difference), typically accommodating standard PCB layouts designed for 7.50mm lead spacing. Higher inventory availability (4065 units) provides supply chain flexibility.

B32521C6333K Selection Criteria: This substitute is suitable only for applications where PCB layout can accommodate the different physical footprint (13.00mm length, 10.00mm lead spacing). The part carries Not For New Designs status, restricting its use to legacy system maintenance, repair operations, or existing production lines where design changes are not feasible. The stacked metallized PET dielectric construction maintains electrical equivalence while offering different physical characteristics. Selection of this part requires explicit engineering justification based on existing design constraints rather than new development initiatives.

Compliance Verification: All three parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronics manufacturing across regulated markets. No additional compliance documentation is required for substitution between these parts.

Frequently Asked Questions (FAQ)

Q: Can DME4S33K-F replace 167333K400C-F without PCB modification?

A: Yes. Both parts share identical electrical specifications (0.033 µF, ±10%, 400V DC, 200V AC) and identical lead spacing (7.50mm). Physical dimensions differ minimally (length 10.30mm versus 10.50mm, width 6.00mm versus 5.00mm), which typically falls within standard PCB tolerance ranges for radial component footprints. Verification of specific PCB layout constraints is recommended before implementation.

Q: What is the significance of B32521C6333K being marked "Not For New Designs"?

A: This designation indicates the manufacturer (EPCOS - TDK Electronics) has discontinued active development and marketing of this part for new applications. While the part remains electrically equivalent and available in inventory, it is intended for legacy system support only. New product designs should prioritize Active status parts (167333K400C-F or DME4S33K-F) to ensure long-term supply chain stability and manufacturer support.

Q: Does the different lead spacing of B32521C6333K (10.00mm versus 7.50mm) prevent substitution?

A: Lead spacing differences prevent direct PCB substitution without layout redesign. The B32521C6333K requires PCB footprint modification to accommodate 10.00mm spacing. This part is suitable only for applications where PCB redesign is acceptable or where existing designs already incorporate 10.00mm spacing. For standard designs utilizing 7.50mm spacing, DME4S33K-F is the appropriate substitute.

Q: Are all three parts RoHS3 compliant?

A: Yes. The 167333K400C-F, DME4S33K-F, and B32521C6333K all carry ROHS3 Compliant certification. All three parts are REACH Unaffected. No compliance barriers exist for substitution between these parts in regulated manufacturing environments.

Q: What dielectric material differences exist between the substitutes?

A: The 167333K400C-F and DME4S33K-F specify polyester metallized dielectric. The B32521C6333K specifies polyester PET metallized stacked dielectric. Both configurations are polyester-based with metallized construction, maintaining electrical equivalence for the specified capacitance, voltage, and tolerance values. The stacked configuration in B32521C6333K contributes to its different physical dimensions but does not alter electrical performance within the specified parameters.

Q: Which substitute offers the best inventory availability?

A: B32521C6333K currently maintains the highest inventory level at 5964 units, followed by DME4S33K-F at 4065 units. However, inventory levels are subject to change. For applications requiring immediate availability with Active product status, DME4S33K-F provides the optimal balance of supply and long-term manufacturer support.