DLR1S33K-F Equivalent & Substitute Parts Reference

Part Overview

The DLR1S33K-F is a 0.033 µF polyester film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 100V DC operation with ±10% tolerance. This component is classified as obsolete, though 766 units remain in current inventory. The part operates across a temperature range of -40°C to 85°C and is designed for general-purpose applications requiring radial through-hole mounting.

Due to the obsolete status of the DLR1S33K-F, identification of equivalent substitute parts is necessary for ongoing design support, production continuity, and long-term component availability. The substitute parts listed maintain the same capacitance value and voltage rating while offering improved specifications, active product status, and enhanced temperature performance.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	0.033 µF	Primary electrical specification; must match exactly
Voltage Rating (DC)	100V	Minimum voltage requirement; substitutes at equal or higher rating are acceptable
Tolerance	±10%	Acceptable tolerance band; substitutes with ±5% or ±10% are compatible
Dielectric Material	Polyester	Material type; polyester and metallized polyester are compatible
Mounting Type	Through Hole Radial	Physical mounting configuration; must remain consistent
Lead Spacing	0.197" (5.00mm)	PCB footprint compatibility; must match for direct substitution
Operating Temperature	-40°C to 85°C	Functional range; substitutes with extended range (-55°C to 125°C) are acceptable
RoHS Status	ROHS3 Compliant	Environmental compliance requirement; all substitutes must maintain compliance

Substitute Part Grouping Explanation

Substitute parts for the DLR1S33K-F are grouped based on the following substitution criteria:

Primary Matching Parameters:

Capacitance: 0.033 µF (exact match required)
Voltage Rating (DC): 100V minimum (equal or higher acceptable)
Mounting Type: Through Hole Radial (exact match required)
Lead Spacing: 0.197" / 5.00mm (exact match required)
Dielectric: Polyester or Metallized Polyester (compatible)

Secondary Compatibility Parameters:

Tolerance: ±10% or ±5% (both acceptable)
Operating Temperature: Extended range acceptable (original -40°C to 85°C; substitutes -55°C to 125°C)
RoHS Status: ROHS3 Compliant (required)
Termination: PC Pins (consistent across all parts)

Grouping Categories:

Group 1 - Direct Equivalents (100V DC, ±5% Tolerance): 168333J100C-F, 185333J100RCA-F, 185333J100RCB-F

Group 2 - Direct Equivalents (100V DC, ±10% Tolerance): 168333K100C-F, 185333K100RCA-F, 185333K100RCB-F

Group 3 - Upgraded Specifications (250V DC, ±5% Tolerance): 168333J250C-F, 185333J250RCA-F, 185333J250RCB-F

Group 4 - Upgraded Specifications (250V DC, ±10% Tolerance): 168333K250C-F

All substitute parts maintain identical capacitance, lead spacing, and mounting configuration. Differences exist in voltage rating, tolerance grade, dielectric construction (metallized vs. standard polyester), packaging format (bulk vs. tape & reel), and product status (active vs. obsolete).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage (DC)	Voltage (AC)	Dielectric	Temp Range	Package Type	Status	Inventory
DLR1S33K-F	CDE	DLR	0.033 µF	±10%	100V	63V	Polyester	-40°C to 85°C	Radial	Obsolete	766 Pcs
168333J100C-F	CDE	168	0.033 µF	±5%	100V	63V	Polyester, Metallized	-55°C to 125°C	Bulk	Active	720 Pcs
168333K100C-F	CDE	168	0.033 µF	±10%	100V	63V	Polyester, Metallized	-55°C to 125°C	Bulk	Active	637 Pcs
168333J250C-F	CDE	168	0.033 µF	±5%	250V	160V	Polyester, Metallized	-55°C to 125°C	Bulk	Active	975 Pcs
168333K250C-F	CDE	168	0.033 µF	±10%	250V	160V	Polyester, Metallized	-55°C to 125°C	Bulk	Active	1111 Pcs
185333J100RCA-F	CDE	185	0.033 µF	±5%	100V	63V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	769 Pcs
185333J100RCB-F	CDE	185	0.033 µF	±5%	100V	63V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	924 Pcs
185333K100RCA-F	CDE	185	0.033 µF	±10%	100V	63V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	1006 Pcs
185333K100RCB-F	CDE	185	0.033 µF	±10%	100V	63V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	926 Pcs
185333J250RCA-F	CDE	185	0.033 µF	±5%	250V	160V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	910 Pcs
185333J250RCB-F	CDE	185	0.033 µF	±5%	250V	160V	Polyester, Metallized	-55°C to 125°C	Tape & Reel	Active	650 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

Select 168333K100C-F or 185333K100RCA-F / 185333K100RCB-F for direct substitution. These parts maintain the 0.033 µF capacitance, ±10% tolerance, and 100V DC rating of the original DLR1S33K-F. All three options are active products with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The 168 series offers bulk packaging, while the 185 series provides tape & reel format for automated assembly.

For Improved Tolerance Specification:

Select 168333J100C-F or 185333J100RCA-F / 185333J100RCB-F when tighter tolerance control is required. These parts provide ±5% tolerance while maintaining identical voltage rating and capacitance. Active product status ensures long-term availability.

For Elevated Voltage Applications:

Select 168333J250C-F, 168333K250C-F, 185333J250RCA-F, 185333J250RCB-F, or 185333K250C-F when circuit design requires higher voltage margin. These parts are rated for 250V DC (160V AC), providing 2.5× voltage headroom compared to the original 100V specification. All maintain 0.033 µF capacitance and are active products.

Packaging Considerations:

Bulk packaging (168 series): Suitable for manual assembly, rework, and prototype applications
Tape & Reel packaging (185 series): Required for automated pick-and-place assembly and high-volume production

Compliance Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental requirements of the original DLR1S33K-F.

Frequently Asked Questions (FAQ)

Q: Can I use a 250V rated capacitor in place of a 100V rated capacitor?

A: Yes. A capacitor rated for higher voltage can be used in applications requiring lower voltage. The 250V-rated parts (168333J250C-F, 168333K250C-F, 185333J250RCA-F, 185333J250RCB-F, 185333K250C-F) are electrically compatible with circuits designed for 100V operation. Physical dimensions remain consistent with the original footprint.

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

A: Tolerance specifies the allowable deviation from the nominal capacitance value. A ±5% tolerance part (168333J100C-F, 185333J100RCA-F, 185333J100RCB-F, 168333J250C-F, 185333J250RCA-F, 185333J250RCB-F) provides tighter capacitance accuracy than a ±10% part. Both are acceptable substitutes; selection depends on circuit sensitivity to capacitance variation.

Q: Why do some substitute parts use metallized polyester dielectric?

A: Metallized polyester construction is a manufacturing variation that maintains electrical equivalence while offering improved performance characteristics. All substitute parts with metallized polyester maintain the same capacitance, voltage rating, and lead spacing as the original DLR1S33K-F.

Q: What is the significance of the 168 and 185 series designations?

A: These designations identify different product lines within Cornell Dubilier Electronics' film capacitor portfolio. Both series are active products with identical electrical specifications for equivalent part numbers. The primary difference is packaging format: 168 series is available in bulk, while 185 series is available in tape & reel.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the environmental certification of the original DLR1S33K-F.

Q: Can I mix bulk and tape & reel packaged parts in the same assembly?

A: Yes. Bulk (168 series) and tape & reel (185 series) parts are electrically and mechanically identical for equivalent part numbers. Packaging format selection is determined by assembly process requirements, not electrical compatibility.

Q: What is the lead spacing requirement?

A: All substitute parts maintain 0.197" (5.00mm) lead spacing, ensuring direct PCB footprint compatibility with the original DLR1S33K-F. This parameter is critical for through-hole radial mounting.

Q: Why is the DLR1S33K-F classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. However, 766 units remain in current inventory. The substitute parts listed (168 and 185 series) are active products, ensuring continued availability for future production runs and design revisions.

Q: What is the operating temperature range difference?

A: The original DLR1S33K-F operates from -40°C to 85°C. All substitute parts extend this range to -55°C to 125°C, providing improved performance in extreme temperature environments. This extended range is a specification enhancement and does not affect compatibility in applications using the original temperature range.

Q: Are there any physical dimension differences between the main part and substitutes?

A: Yes. The DLR1S33K-F measures 0.315" L × 0.177" W (8.00mm × 4.50mm) with 0.453" seated height. Substitute parts measure 0.283" L × 0.098" W (7.20mm × 2.50mm) for 100V ratings and 0.283" L × 0.138" W (7.20mm × 3.50mm) for 250V ratings, with seated heights of 0.256" and 0.295" respectively. Lead spacing (0.197" / 5.00mm) remains constant. Physical size reduction is a design improvement that maintains PCB footprint compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message