160333K400D-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 160333K400D-F is a 0.033 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 160 series. This radial through-hole component operates at 400V DC with ±10% tolerance and polyester metallized dielectric construction. The part is classified as Active product status with 730 units currently in stock.

Film capacitors in this specification are used in general-purpose applications requiring stable capacitance across temperature ranges from -55°C to 105°C. Equivalent and substitute parts become necessary when primary inventory is depleted, when design revisions require enhanced specifications, or when alternative manufacturers offer improved availability or performance characteristics within the same electrical parameters.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	0.033	µF	Critical - must match exactly
Voltage Rating (DC)	400	V	Critical - must equal or exceed
Voltage Rating (AC)	200	V	Critical - must equal or exceed
Tolerance	±10% (±5% for upgrades)	%	Functional - tighter tolerance acceptable
Dielectric Material	Polyester, Metallized	—	Critical - determines electrical characteristics
Operating Temperature Range	-55°C to 105°C (125°C for alternatives)	°C	Functional - wider range acceptable
Mounting Type	Through Hole	—	Critical - determines PCB compatibility
Package Type	Radial	—	Critical - determines physical fit
Lead Spacing	0.394" (10.00mm)	in / mm	Critical - PCB hole pattern match
RoHS Status	ROHS3 Compliant	—	Regulatory - all substitutes must comply

Substitute Part Grouping Explanation

Substitution logic for the 160333K400D-F is based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Capacitance value: 0.033 µF (exact match required)
Voltage rating: 400V DC minimum, 200V AC minimum
Dielectric type: Polyester, metallized construction
Mounting: Through-hole radial configuration
Lead spacing: 0.394" (10.00mm) for direct PCB compatibility

Acceptable Variations:

Tolerance: ±10% or tighter (±5% represents upgrade specification)
Operating temperature: -55°C to 105°C or wider range (-55°C to 125°C acceptable)
Physical dimensions: Minor variations in length and width acceptable if lead spacing and height remain compatible with PCB assembly
Manufacturer: Different manufacturers acceptable if all electrical parameters match

Non-Substitutable Parameters:

Capacitance value must remain 0.033 µF
Voltage ratings cannot be lower than specified
Through-hole radial package type is mandatory
Lead spacing of 0.394" (10.00mm) is required for direct replacement

Parameter Comparison

Parameter	160333K400D-F (CDE)	DME4S33K-F (CDE)	B32521C6333K (EPCOS-TDK)	B32521C6333J (EPCOS-TDK)
Manufacturer	Cornell Dubilier Electronics	Cornell Dubilier Electronics	EPCOS - TDK Electronics	EPCOS - TDK Electronics
Series	160	DME	B3252* - MKT	B3252* - MKT
Capacitance	0.033 µF	0.033 µF	0.033 µF	0.033 µF
Tolerance	±10%	±10%	±10%	±5%
Voltage Rating (DC)	400V	400V	400V	400V
Voltage Rating (AC)	200V	200V	200V	200V
Dielectric Material	Polyester, Metallized	Polyester, Metallized	Polyester, PET, Metallized - Stacked	Polyester, PET, Metallized - Stacked
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial
Lead Spacing	0.394" (10.00mm)	0.295" (7.50mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension (L x W)	0.512" x 0.197" (13.00mm x 5.00mm)	0.406" x 0.236" (10.30mm x 6.00mm)	0.512" x 0.157" (13.00mm x 4.00mm)	0.512" x 0.157" (13.00mm x 4.00mm)
Height - Seated (Max)	0.433" (11.00mm)	0.413" (10.50mm)	0.354" (9.00mm)	0.354" (9.00mm)
Product Status	Active	Active	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory (Pcs)	730	4065	5964	4971

Engineering Selection Recommendations

Direct Replacement (Preferred):

B32521C6333K and B32521C6333J from EPCOS-TDK Electronics are direct electrical equivalents with matching 0.394" (10.00mm) lead spacing. Both parts maintain 400V DC and 200V AC ratings with identical capacitance and polyester dielectric construction. B32521C6333J offers tighter ±5% tolerance compared to the ±10% specification of 160333K400D-F. Both EPCOS parts support extended operating temperature to 125°C, exceeding the 105°C maximum of the original part. However, both EPCOS parts carry "Not For New Designs" product status, indicating they are legacy components suitable only for replacement applications in existing designs.

Alternative with Lead Spacing Consideration:

DME4S33K-F from Cornell Dubilier Electronics maintains manufacturer continuity and Active product status. This part matches all critical electrical parameters (0.033 µF, 400V DC, 200V AC, ±10% tolerance, polyester metallized dielectric). The DME4S33K-F extends operating temperature to 125°C. However, the lead spacing is 0.295" (7.50mm) compared to the 0.394" (10.00mm) of the original 160333K400D-F, requiring PCB redesign or adapter consideration for direct substitution.

Compliance and Regulatory:

All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of 160333K400D-F. All parts carry EAR99 ECCN classification and identical HTSUS code 8532.25.0070.

Inventory Availability:

DME4S33K-F (4065 units), B32521C6333K (5964 units), and B32521C6333J (4971 units) all offer significantly higher inventory levels than the original 160333K400D-F (730 units), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can B32521C6333K replace 160333K400D-F directly on the PCB?

A: Yes, B32521C6333K is a direct electrical and mechanical replacement. Both parts have identical 0.394" (10.00mm) lead spacing, matching 400V DC and 200V AC ratings, 0.033 µF capacitance, and polyester metallized dielectric. Physical dimensions differ slightly, but the part fits standard through-hole radial footprints designed for 10.00mm lead spacing.

Q: What is the difference between B32521C6333K and B32521C6333J?

A: Both parts are electrically equivalent with identical capacitance, voltage ratings, and lead spacing. The primary difference is tolerance: B32521C6333K specifies ±10% tolerance, while B32521C6333J specifies ±5% tolerance. B32521C6333J represents an upgrade specification with tighter capacitance accuracy. Both parts are EPCOS-TDK products with "Not For New Designs" status.

Q: Why does DME4S33K-F have different lead spacing?

A: DME4S33K-F uses 0.295" (7.50mm) lead spacing compared to the 0.394" (10.00mm) of 160333K400D-F. This difference reflects different design generations within Cornell Dubilier's product line. Direct PCB substitution requires either PCB modification or mechanical adapter consideration. However, all electrical parameters remain compatible.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts listed (DME4S33K-F, B32521C6333K, B32521C6333J) are ROHS3 compliant, matching the regulatory status of 160333K400D-F. All parts are also REACH unaffected.

Q: What does "Not For New Designs" mean for EPCOS parts?

A: "Not For New Designs" indicates that B32521C6333K and B32521C6333J are legacy products suitable for replacement and repair applications in existing designs. These parts remain available and fully functional but are not recommended for new product development. For new designs, Active status parts like 160333K400D-F or DME4S33K-F are preferred.

Q: Can I use a substitute with higher operating temperature?

A: Yes, substitute parts with extended operating temperature ranges (-55°C to 125°C) are acceptable replacements for applications requiring -55°C to 105°C operation. The wider temperature range provides additional design margin without compromising performance within the original specification.

Q: What is the significance of "Polyester, Metallized" versus "Polyester, PET, Metallized - Stacked"?

A: Both dielectric constructions are polyester-based metallized film capacitors suitable for the same electrical applications. The EPCOS parts specify "Polyester, Polyethylene Terephthalate (PET), Metallized - Stacked" construction, which is a more detailed material description. The functional electrical characteristics remain equivalent for 0.033 µF, 400V DC applications.

Q: Is inventory level a factor in substitution selection?

A: Inventory level is a supply chain consideration but not an electrical substitution criterion. DME4S33K-F, B32521C6333K, and B32521C6333J all offer higher inventory availability than 160333K400D-F, supporting long-term supply continuity. Selection should prioritize electrical compatibility and lead spacing match first, then consider inventory availability as a secondary factor.

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