DSF050J155 Film Capacitor Equivalent & Substitute Parts

Part Overview

The DSF050J155 is a 1.5 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 50V DC voltage rating and ±5% tolerance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part features polyester metallized-stacked dielectric construction in a radial through-hole package, suitable for general-purpose applications requiring stable capacitance across the operating temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	1.5 µF	Must match exactly
Tolerance	±5%	Must match or be tighter
Voltage Rating (DC)	50V	Substitute must equal or exceed
Dielectric Material	Polyester, Metallized - Stacked	Determines electrical characteristics
Mounting Type	Through Hole Radial	Must match for PCB compatibility
Lead Spacing	0.295" (7.50mm)	Critical for board layout
Operating Temperature	-40°C ~ 85°C	Substitute range must encompass or exceed
RoHS Status	ROHS3 Compliant	Regulatory requirement

Substitute Part Grouping Explanation

Substitution of the DSF050J155 is determined by strict equivalence in the following parameters:

Critical Parameters (Must Match):

Capacitance value: 1.5 µF
Tolerance: ±5%
Mounting type: Through-hole radial
Dielectric type: Polyester metallized construction

Allowable Variations (Substitute Must Meet or Exceed):

Voltage rating: Substitute DC voltage must be ≥50V
Operating temperature range: Substitute range must encompass the original -40°C to 85°C specification
Lead spacing: 0.295" (7.50mm) is preferred for direct PCB compatibility; minor variations acceptable if board layout permits

Compliance Requirements:

RoHS3 compliance required
REACH unaffected status maintained

The three substitute parts listed below satisfy these criteria with variations in voltage rating, physical dimensions, and temperature range that do not compromise functional equivalence in the DSF050J155 application space.

Parameter Comparison

Parameter	DSF050J155 (Main)	B32520C0155J000	ECQ-E2155JB	R82DC4150Z360J
Manufacturer	Cornell Dubilier Electronics	EPCOS - TDK Electronics	Panasonic Electronic Components	KEMET
Capacitance	1.5 µF	1.5 µF	1.5 µF	1.5 µF
Tolerance	±5%	±5%	±5%	±5%
Voltage Rating (DC)	50V	63V	250V	63V
Voltage Rating (AC)	—	40V	125V	40V
Dielectric Material	Polyester, Metallized - Stacked	Polyester, PET, Metallized - Stacked	Polyester, Metallized	Polyester, PET, Metallized - Stacked
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 105°C	-55°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial
Lead Spacing	0.295" (7.50mm)	0.295" (7.50mm)	0.492" (12.50mm)	0.197" (5.00mm)
Size / Dimension (L x W)	0.402" x 0.283" (10.20mm x 7.20mm)	0.394" x 0.197" (10.00mm x 5.00mm)	0.602" x 0.339" (15.30mm x 8.60mm)	0.283" x 0.236" (7.20mm x 6.00mm)
Height - Seated (Max)	0.433" (11.00mm)	0.413" (10.50mm)	0.657" (16.70mm)	0.437" (11.10mm)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

B32520C0155J000 (EPCOS - TDK Electronics)

This substitute provides direct functional equivalence with identical lead spacing (0.295" / 7.50mm), enabling drop-in replacement without PCB layout modification. The 63V DC rating exceeds the original 50V specification, providing additional voltage margin. Extended operating temperature range (-55°C to 125°C) accommodates broader environmental conditions. AEC-Q200 automotive qualification and active product status ensure long-term availability. Compact dimensions (10.00mm x 5.00mm) offer space efficiency. This part is the preferred substitute for applications requiring minimal design changes.

ECQ-E2155JB (Panasonic Electronic Components)

This substitute meets all critical electrical parameters with a 250V DC rating, providing substantial voltage headroom for applications with potential transient overvoltage conditions. Active product status and established supply chain support long-term procurement. Operating temperature range (-40°C to 105°C) exceeds the original specification. Physical dimensions are larger (15.30mm x 8.60mm) with increased lead spacing (0.492" / 12.50mm), requiring PCB layout verification before implementation. This part is suitable for applications where board space permits and higher voltage margin is beneficial.

R82DC4150Z360J (KEMET)

This substitute delivers electrical equivalence with 63V DC rating and identical tolerance. Compact dimensions (7.20mm x 6.00mm) provide space optimization for dense layouts. AEC-Q200 automotive qualification and active product status ensure supply continuity. Reduced lead spacing (0.197" / 5.00mm) requires PCB layout confirmation for compatibility. Operating temperature range (-55°C to 105°C) exceeds original specifications. This part is appropriate for space-constrained applications where lead spacing modification is feasible.

Frequently Asked Questions (FAQ)

Q: Can the DSF050J155 be replaced with any of these three substitutes?

A: All three substitutes meet the critical electrical requirements: 1.5 µF capacitance, ±5% tolerance, polyester metallized dielectric, and through-hole radial mounting. However, lead spacing and physical dimensions differ. B32520C0155J000 provides direct PCB compatibility with identical 0.295" lead spacing. ECQ-E2155JB and R82DC4150Z360J require PCB layout verification due to different lead spacing.

Q: What is the significance of the voltage rating difference?

A: The DSF050J155 is rated 50V DC. All substitutes exceed this rating (B32520C0155J000 and R82DC4150Z360J at 63V; ECQ-E2155JB at 250V). Higher voltage ratings provide safety margin and are electrically compatible with 50V applications. No derating is required.

Q: Are there temperature range considerations?

A: The original part operates -40°C to 85°C. All substitutes extend this range: B32520C0155J000 (-55°C to 125°C), ECQ-E2155JB (-40°C to 105°C), and R82DC4150Z360J (-55°C to 105°C). Substitutes are suitable for applications within or exceeding the original temperature specification.

Q: Which substitute requires the least PCB modification?

A: B32520C0155J000 maintains identical lead spacing (0.295" / 7.50mm) and similar physical dimensions, enabling direct drop-in replacement without PCB layout changes.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the difference between "Direct" and "Similar" substitute classifications?

A: B32520C0155J000 is classified as a direct substitute due to matching lead spacing and compact dimensions. ECQ-E2155JB and R82DC4150Z360J are classified as similar substitutes because they meet electrical specifications but require PCB layout verification due to different lead spacing and physical dimensions.

Q: Can I use ECQ-E2155JB in a space-constrained application?

A: ECQ-E2155JB has larger dimensions (15.30mm x 8.60mm) and wider lead spacing (0.492" / 12.50mm) compared to the original part. Space-constrained applications should prioritize B32520C0155J000 or R82DC4150Z360J, depending on available lead spacing tolerance.

Q: Are these substitutes suitable for automotive applications?

A: B32520C0155J000 and R82DC4150Z360J carry AEC-Q200 automotive qualification. ECQ-E2155JB does not list automotive qualification but is suitable for general-purpose applications. Application requirements should determine automotive suitability.

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