DMM1W1K-F Equivalent & Substitute Parts Reference

Part Overview

The DMM1W1K-F is a 1 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 100V DC voltage rating and ±10% tolerance. This polyester metallized radial capacitor operates across -55°C to 125°C and is designed for general-purpose applications. The part is currently Active in product status with 883 pieces in stock inventory.

Equivalent and substitute parts are identified when electrical parameters (capacitance, voltage rating, tolerance, dielectric material) and mechanical parameters (mounting type, package case, lead spacing, termination) align with application requirements. Substitutes enable design flexibility, supply chain alternatives, and performance upgrades when higher voltage ratings or tighter tolerances are required.

Key Parameters

Parameter	Value
Capacitance	1 µF
Tolerance	±10%
Voltage Rating - DC	100V
Voltage Rating - AC	65V
Dielectric Material	Polyester, Metallized
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package / Case	Radial
Lead Spacing	0.591" (15.00mm)
Termination	PC Pins
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution logic for the DMM1W1K-F is based on the following criteria:

Electrical Compatibility Parameters:

Capacitance value must equal 1 µF
Voltage rating must be equal to or greater than 100V DC
Tolerance must be ±10% or tighter (±5%)
Dielectric material must be polyester-based metallized film
Operating temperature range must encompass -55°C to 125°C

Mechanical Compatibility Parameters:

Mounting type must be Through Hole
Package case must be Radial
Lead spacing must be 0.591" (15.00mm) or compatible with PCB layout
Termination must be PC Pins

Compliance Parameters:

RoHS3 Compliant status required
REACH Unaffected status required

Substitute parts are categorized as Upgrade (higher voltage rating) or Similar (equivalent electrical specifications with different physical dimensions or series designation).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage DC	Voltage AC	Dielectric	Lead Spacing	Size L x W (mm)	Height Max (mm)	Inventory	Substitution Type
DMM1W1K-F	CDE	1 µF	±10%	100V	65V	Polyester, Metallized	15.00mm	18.00 x 9.00	15.00	883	Main Part
DME2W1K-F	CDE	1 µF	±10%	250V	160V	Polyester, Metallized	15.00mm	18.50 x 8.00	17.00	4580	Upgrade
DME1W1K-F	CDE	1 µF	±10%	100V	65V	Polyester, Metallized	10.00mm	12.50 x 7.00	15.50	1133	Similar
DMT1W1K-F	CDE	1 µF	±10%	100V	65V	Polyester, Metallized	29.70mm	33.80 x 13.20	20.92	1856	Similar
B32522C3105J000	EPCOS - TDK	1 µF	±5%	250V	160V	Polyester PET, Metallized - Stacked	15.00mm	18.00 x 8.50	14.50	1758	Upgrade
B32522C3105J189	EPCOS - TDK	1 µF	±5%	250V	160V	Polyester PET, Metallized - Stacked	15.00mm	18.00 x 8.50	14.50	2819	Upgrade
B32522C3105K000	EPCOS - TDK	1 µF	±10%	250V	160V	Polyester PET, Metallized - Stacked	15.00mm	18.00 x 8.50	14.50	10701	Upgrade
B32522N3105J000	EPCOS - TDK	1 µF	±5%	250V	160V	Polyester PET, Metallized	15.00mm	18.00 x 8.50	14.50	2759	Upgrade
B32522N3105K000	EPCOS - TDK	1 µF	±10%	250V	160V	Polyester PET, Metallized	15.00mm	18.00 x 8.50	14.50	5541	Upgrade
105MSR100K	Cornell Dubilier / Illinois Capacitor	1 µF	±10%	100V	63V	Polyester, Metallized	15.00mm	18.50 x 8.50	13.50	3338	Similar

Engineering Selection Recommendations

For Direct Replacement (Equivalent Electrical Performance):

The DME1W1K-F and 105MSR100K provide equivalent electrical specifications to the DMM1W1K-F with identical capacitance (1 µF), tolerance (±10%), and voltage rating (100V DC). Both are ROHS3 Compliant and REACH Unaffected. Selection between these options depends on PCB layout constraints: the DME1W1K-F features a 10.00mm lead spacing suitable for compact designs, while the 105MSR100K maintains the standard 15.00mm lead spacing. The DMT1W1K-F is electrically equivalent but features significantly larger physical dimensions (33.80mm length, 29.70mm lead spacing) and is suitable only for applications with adequate board space.

For Voltage Rating Upgrade:

The DME2W1K-F (CDE) provides a 250V DC upgrade while maintaining the same 1 µF capacitance, ±10% tolerance, and 15.00mm lead spacing as the main part. This option is suitable for applications requiring higher voltage margin or operating in elevated voltage environments.

The EPCOS B3252* series (B32522C3105J000, B32522C3105J189, B32522C3105K000, B32522N3105J000, B32522N3105K000) offers 250V DC voltage rating with identical 15.00mm lead spacing and compact physical dimensions (18.00mm x 8.50mm). These parts feature AEC-Q200 automotive qualification and are suitable for automotive and EMI/RFI suppression applications. Tolerance options include ±5% (J suffix) and ±10% (K suffix). The B32522C series uses stacked metallized construction, while the B32522N series uses standard metallized construction.

All substitute parts maintain ROHS3 Compliance and REACH Unaffected status, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the DME1W1K-F replace the DMM1W1K-F directly on the PCB?

A: The DME1W1K-F is electrically equivalent but features a 10.00mm lead spacing compared to the DMM1W1K-F's 15.00mm spacing. Direct PCB replacement is not possible without layout modification. The part is suitable only if the PCB design accommodates the reduced lead spacing.

Q: What is the difference between upgrade parts with 250V rating and the original 100V part?

A: Upgrade parts (DME2W1K-F, B3252* series) provide higher voltage rating (250V DC) while maintaining the same 1 µF capacitance and ±10% tolerance. These parts are suitable for applications requiring higher voltage margin, higher reliability in voltage stress conditions, or operation in elevated voltage environments. Physical dimensions vary slightly between manufacturers.

Q: Are EPCOS B3252 parts suitable for automotive applications?*

A: Yes. The EPCOS B3252* series carries AEC-Q200 automotive qualification and is rated for automotive and EMI/RFI suppression applications. These parts are suitable for automotive circuit designs requiring equivalent or upgraded voltage performance.

Q: What is the difference between B32522C and B32522N series?

A: The B32522C series uses stacked metallized construction, while the B32522N series uses standard metallized construction. Both series provide identical electrical specifications (1 µF, 250V DC) and physical dimensions (18.00mm x 8.50mm, 15.00mm lead spacing). Selection depends on application-specific performance requirements for dielectric construction type.

Q: Can I use a ±5% tolerance part (B32522C3105J000) instead of ±10% tolerance (DMM1W1K-F)?

A: Yes. A ±5% tolerance part is a tighter tolerance specification and is compatible with applications designed for ±10% tolerance. The ±5% part provides improved capacitance accuracy and is suitable as a direct upgrade.

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

A: The DMM1W1K-F uses 15.00mm lead spacing. Substitute parts with identical 15.00mm spacing (DME2W1K-F, B3252* series, 105MSR100K) are directly compatible with existing PCB layouts. The DME1W1K-F (10.00mm) and DMT1W1K-F (29.70mm) require PCB layout modification and are not direct replacements.

Q: Are all substitute parts ROHS3 Compliant?

A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, maintaining regulatory compatibility with the original DMM1W1K-F specification.

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