Equivalent & Substitute Parts for 185104K250RGA-F

Part Overview

The 185104K250RGA-F is a 0.1 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 185 series. This radial polyester metallized capacitor operates at 250V DC with ±10% tolerance and is rated for -55°C to 125°C. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Key Parameters

Parameter	Value
Capacitance	0.1 µF
Tolerance	±10%
Voltage Rating - DC	250V
Voltage Rating - AC	160V
Dielectric Material	Polyester, Metallized
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	Radial
Termination	PC Pins
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 185104K250RGA-F is determined by the following critical parameters:

Electrical Equivalence Requirements:

Capacitance: 0.1 µF (exact match required)
Voltage Rating - DC: 250V (minimum requirement)
Voltage Rating - AC: 160V (minimum requirement)
Dielectric Material: Polyester, Metallized (functional equivalence)
Operating Temperature: -55°C ~ 125°C (minimum range required)

Mechanical Compatibility Requirements:

Mounting Type: Through Hole
Package / Case: Radial
Termination: PC Pins
Lead Spacing: Physical board layout compatibility

Tolerance Consideration:

±10% tolerance parts are direct substitutes
±5% tolerance parts represent upgraded specifications with tighter tolerance control

Substitute parts are grouped into three categories: Similar (same electrical specs, different packaging or dimensions), Direct (equivalent from alternative manufacturer), and Upgrade (tighter tolerance specification).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage DC	Voltage AC	Temp Range	Lead Spacing	Packaging	Inventory
185104K250RGA-F	CDE	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.197" (5.00mm)	Tape & Reel	654 Pcs
160104K250D-F	CDE	0.1 µF	±10%	250V	160V	-55°C ~ 105°C	0.394" (10.00mm)	Bulk	2929 Pcs
DME2P1K-F	CDE	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.295" (7.50mm)	Bulk	1926 Pcs
B32529C3104K000	EPCOS - TDK	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.197" (5.00mm)	Bulk	63354 Pcs
B32529C3104J000	EPCOS - TDK	0.1 µF	±5%	250V	160V	-55°C ~ 125°C	0.197" (5.00mm)	Bulk	47439 Pcs
B32529C3104J189	EPCOS - TDK	0.1 µF	±5%	250V	160V	-55°C ~ 125°C	0.197" (5.00mm)	Cut Tape	35485 Pcs
B32529C3104J289	EPCOS - TDK	0.1 µF	±5%	250V	160V	-55°C ~ 125°C	0.197" (5.00mm)	Cut Tape	12624 Pcs
B32520C3104K000	EPCOS - TDK	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.295" (7.50mm)	Bulk	12416 Pcs
B32520C3104K289	EPCOS - TDK	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.295" (7.50mm)	Cut Tape	107116 Pcs
B32521C3104K189	EPCOS - TDK	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.394" (10.00mm)	Tape & Reel	7674 Pcs
B32522C3104K000	EPCOS - TDK	0.1 µF	±10%	250V	160V	-55°C ~ 125°C	0.591" (15.00mm)	Bulk	4804 Pcs

Engineering Selection Recommendations

Direct Electrical Equivalents (Same Tolerance ±10%):

B32529C3104K000 from EPCOS - TDK Electronics is the primary direct substitute. It matches the 185104K250RGA-F in capacitance (0.1 µF), tolerance (±10%), voltage ratings (250V DC / 160V AC), temperature range (-55°C ~ 125°C), and lead spacing (0.197" / 5.00mm). Both are ROHS3 compliant and rated for automotive applications with AEC-Q200 certification. This part is available in bulk packaging with 63354 units in stock.

B32520C3104K289 and B32520C3104K000 are equivalent alternatives with identical electrical specifications but different lead spacing (0.295" / 7.50mm). These are suitable only if board layout accommodates the wider spacing.

B32521C3104K189 provides equivalent electrical performance with 0.394" (10.00mm) lead spacing and Tape & Reel packaging, matching the original packaging format of the 185104K250RGA-F.

Upgraded Tolerance Specification (±5%):

B32529C3104J000, B32529C3104J189, and B32529C3104J289 offer tighter tolerance control at ±5% while maintaining all other electrical and mechanical specifications. These parts are suitable for applications requiring higher capacitance accuracy. All three maintain the 0.197" (5.00mm) lead spacing and -55°C ~ 125°C operating range.

CDE Alternative Sources:

160104K250D-F and DME2P1K-F are Cornell Dubilier alternatives with identical electrical specifications. The 160104K250D-F operates to 105°C maximum (versus 125°C for the main part) and features 0.394" (10.00mm) lead spacing. The DME2P1K-F maintains the full -55°C ~ 125°C range with 0.295" (7.50mm) lead spacing.

Compliance Status:

All listed substitutes are ROHS3 compliant and REACH unaffected. EPCOS - TDK parts carry AEC-Q200 automotive qualification. Selection should be based on board layout requirements (lead spacing), packaging format (bulk, tape & reel, or cut tape), and tolerance requirements.

Frequently Asked Questions (FAQ)

Q: Can B32529C3104K000 replace 185104K250RGA-F directly?

A: Yes. Both parts share identical electrical specifications: 0.1 µF capacitance, ±10% tolerance, 250V DC / 160V AC ratings, and -55°C ~ 125°C operating range. Lead spacing is identical at 0.197" (5.00mm). The primary difference is packaging format (bulk versus tape & reel) and manufacturer. Both are ROHS3 compliant.

Q: What is the difference between ±10% and ±5% tolerance parts?

A: Tolerance defines the allowable deviation from the nominal capacitance value. A ±10% part (185104K250RGA-F) can vary from 0.09 µF to 0.11 µF. A ±5% part (B32529C3104J000) can vary from 0.095 µF to 0.105 µF. The ±5% specification provides tighter capacitance control and is suitable for applications requiring higher accuracy.

Q: Does lead spacing affect substitution compatibility?

A: Lead spacing affects physical board layout compatibility only. Electrical performance is independent of lead spacing. If the PCB is designed for 0.197" (5.00mm) spacing, parts with 0.295" (7.50mm) or 0.394" (10.00mm) spacing cannot be installed without board modification. Verify lead spacing against PCB design before selection.

Q: Are EPCOS - TDK parts suitable for automotive applications?

A: Yes. EPCOS - TDK B3252* series parts carry AEC-Q200 automotive qualification. The 185104K250RGA-F and CDE alternatives are rated for general purpose applications. If automotive qualification is required, EPCOS - TDK parts are the appropriate selection.

Q: What is the difference between Tape & Reel, Cut Tape, and Bulk packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for automated assembly. Cut Tape (CT) provides the same tape format but pre-cut into smaller quantities. Bulk packaging supplies loose components. Selection depends on assembly process requirements and order quantity.

Q: Can 160104K250D-F replace 185104K250RGA-F if operating temperature is below 105°C?

A: Yes, if the application operates within the -55°C ~ 105°C range. The 160104K250D-F is electrically equivalent with identical capacitance, tolerance, and voltage ratings. However, it features 0.394" (10.00mm) lead spacing versus 0.197" (5.00mm) for the original part. Board layout compatibility must be verified.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, hexavalent chromium, and specified flame retardants. All listed substitutes are ROHS3 compliant.

Q: Is inventory availability a factor in substitution selection?

A: Inventory levels are provided for reference. B32529C3104K000 has the highest inventory (63354 units), while B32522C3104K000 has the lowest (4804 units). Availability should be considered alongside electrical and mechanical compatibility requirements.

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