Equivalent & Substitute Parts for 185334K50RCA-F

Part Overview

The Cornell Dubilier Electronics (CDE) 185334K50RCA-F is a 0.33 µF film capacitor rated for 50V DC operation with ±10% tolerance, packaged in radial configuration for through-hole mounting. This polyester metallized capacitor operates across the temperature range of -55°C to 125°C and is classified as Active product status with ROHS3 compliance.

Substitute parts are identified to address specific application requirements including improved tolerance specifications, elevated voltage ratings, alternative packaging formats, and enhanced automotive-grade certifications. All substitute relationships maintain electrical compatibility through identical capacitance values and compatible mechanical dimensions while offering upgraded performance characteristics.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	0.33 µF	Must remain identical across all substitutes
Voltage Rating - DC	50V	Substitutes may have equal or higher ratings
Tolerance	±10%	Substitutes may have tighter tolerance (±5%)
Dielectric Material	Polyester, Metallized	Must be polyester-based film construction
Mounting Type	Through Hole Radial	All substitutes maintain radial through-hole configuration
Lead Spacing	0.197" (5.00mm)	Must match for PCB compatibility
Operating Temperature	-55°C ~ 125°C	Must support full temperature range
RoHS Status	ROHS3 Compliant	All substitutes maintain ROHS3 compliance

Substitute Part Grouping Explanation

Substitute parts for the 185334K50RCA-F are organized into three distinct categories based on electrical parameter upgrades:

Category 1: Same Voltage Rating with Improved Tolerance

Part 168334J50C-F maintains the 50V DC rating while upgrading tolerance from ±10% to ±5%
Packaging changes from Tape & Reel to Bulk format
Mechanical dimensions remain identical

Category 2: Elevated Voltage Rating (63V DC)

Parts 168334J63H-F, B32529C0334J000, B32529C0334J289, B32529C0334K000, B32529C0334K189, and B32529C0334K289 provide 63V DC rating
Tolerance options available at both ±5% and ±10%
EPCOS variants include AEC-Q200 automotive certification
Mechanical dimensions vary slightly between CDE and EPCOS manufacturers

Category 3: Maximum Voltage Rating (100V DC)

Part B32529C1334J000 provides highest voltage rating at 100V DC with ±5% tolerance
EPCOS manufacturer with AEC-Q200 automotive certification
Increased physical height (0.315" seated) compared to main part

All substitutes maintain identical capacitance (0.33 µF), lead spacing (5.00mm), operating temperature range (-55°C to 125°C), and through-hole radial mounting configuration.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage DC	Voltage AC	Dielectric	Packaging	Lead Spacing	Height (Max)	AEC-Q200
185334K50RCA-F	CDE	0.33 µF	±10%	50V	30V	Polyester, Metallized	Tape & Reel	5.00mm	7.50mm	No
168334J50C-F	CDE	0.33 µF	±5%	50V	30V	Polyester, Metallized	Bulk	5.00mm	7.50mm	No
168334J63H-F	CDE	0.33 µF	±5%	63V	40V	Polyester, Metallized	Bulk	5.00mm	7.50mm	No
B32529C0334J000	EPCOS - TDK	0.33 µF	±5%	63V	40V	PET, Metallized - Stacked	Bulk	5.00mm	6.50mm	Yes
B32529C0334J289	EPCOS - TDK	0.33 µF	±5%	63V	40V	PET, Metallized - Stacked	Cut Tape	5.00mm	6.50mm	Yes
B32529C0334K000	EPCOS - TDK	0.33 µF	±10%	63V	40V	PET, Metallized - Stacked	Bulk	5.00mm	6.50mm	Yes
B32529C0334K189	EPCOS - TDK	0.33 µF	±10%	63V	40V	PET, Metallized - Stacked	Cut Tape	5.00mm	6.50mm	Yes
B32529C0334K289	EPCOS - TDK	0.33 µF	±10%	63V	40V	PET, Metallized - Stacked	Cut Tape	5.00mm	6.50mm	Yes
B32529C1334J000	EPCOS - TDK	0.33 µF	±5%	100V	63V	PET, Metallized - Stacked	Bulk	5.00mm	8.00mm	Yes

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating)

The 168334J50C-F from Cornell Dubilier Electronics provides direct electrical substitution with improved tolerance specification (±5% versus ±10%). This part maintains identical voltage rating (50V DC), mechanical dimensions, and lead spacing. Packaging format changes from Tape & Reel to Bulk; verify procurement and assembly compatibility with this format change.

For Voltage Margin Enhancement (63V DC Rating)

The 168334J63H-F (CDE) or EPCOS B32529C0334J series parts provide 26% voltage rating increase while maintaining 0.33 µF capacitance and 5.00mm lead spacing. CDE variant maintains original manufacturer consistency. EPCOS variants include AEC-Q200 automotive certification and slightly reduced physical height (6.50mm versus 7.50mm), requiring PCB layout verification. Tolerance selection available at ±5% (J-code) or ±10% (K-code).

For Maximum Voltage Margin and Automotive Compliance

The B32529C1334J000 provides highest voltage rating (100V DC) with AEC-Q200 certification, suitable for automotive and high-reliability applications. Physical height increases to 8.00mm; confirm PCB clearance. This part represents maximum electrical upgrade path while maintaining identical capacitance and lead spacing.

Packaging Format Considerations

Tape & Reel (TR): Original format for automated assembly
Bulk: Suitable for manual assembly or reel consolidation
Cut Tape (CT): Intermediate format for mixed-volume applications

All substitute parts maintain ROHS3 compliance and identical operating temperature range (-55°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can 168334J50C-F directly replace 185334K50RCA-F in production?

A: Electrical substitution is valid. The 168334J50C-F maintains identical voltage rating (50V DC), capacitance (0.33 µF), lead spacing (5.00mm), and physical dimensions. Tolerance improves from ±10% to ±5%. Packaging changes from Tape & Reel to Bulk; verify assembly line compatibility with bulk format.

Q: What is the advantage of upgrading to 63V DC rated parts?

A: The 63V DC rating provides 26% voltage margin above the original 50V specification. This upgrade reduces stress on the dielectric material and extends component life in applications with voltage transients or marginal power supply regulation. All 63V variants maintain identical 0.33 µF capacitance and 5.00mm lead spacing.

Q: Are EPCOS B32529 series parts compatible with CDE 185 series footprints?

A: Lead spacing (5.00mm) is identical, ensuring PCB compatibility. Physical dimensions vary slightly: EPCOS parts measure 7.30mm length and 6.50mm height versus CDE 7.20mm length and 7.50mm height. Verify PCB clearance, particularly for height-constrained applications. All parts use identical through-hole radial mounting configuration.

Q: What does AEC-Q200 certification indicate?

A: AEC-Q200 is an automotive electronics qualification standard. EPCOS B32529 series parts carry this certification, indicating compliance with automotive reliability and environmental testing requirements. This certification is not applicable to CDE 185 and 168 series parts.

Q: Can B32529C1334J000 (100V) be used in place of 185334K50RCA-F (50V)?

A: Electrical substitution is valid. The 100V rating provides maximum voltage margin. Physical height increases to 8.00mm (versus 7.50mm original); confirm PCB clearance. Lead spacing remains 5.00mm. Capacitance remains 0.33 µF. This represents the highest-rated substitute option.

Q: What is the difference between J-code and K-code tolerance designations?

A: J-code indicates ±5% tolerance; K-code indicates ±10% tolerance. The original 185334K50RCA-F uses K-code (±10%). Upgrading to J-code (±5%) provides tighter capacitance specification, beneficial for precision filtering or timing applications. Both tolerances are acceptable for general-purpose applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, consistent with the original 185334K50RCA-F specification.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across -55°C to 125°C, identical to the original part specification.

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