DMT1S33K Equivalent & Substitute Parts Reference

Part Overview

The DMT1S33K is a 0.033 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 100V DC operation with ±10% tolerance. This component features polyester metallized dielectric construction in a radial through-hole package. The part is currently listed as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements.

Substiute Parts

DMT1S33K

Cornell Dubilier Electronics (CDE)In Stock: 920DMT1S33K Datasheet

Current PartRFQ

DMM4S33K-F

Cornell Dubilier Electronics (CDE)In Stock: 1193DMM4S33K-F Datasheet

DirectRFQ

DMT1S33K-F

Cornell Dubilier Electronics (CDE)In Stock: 844DMT1S33K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DMT1S33K is determined by the following criteria:

Primary Substitution Criteria:

• Capacitance value: 0.033 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric material: Polyester, Metallized (exact match required)
• Mounting type: Through Hole (exact match required)
• Package type: Radial (exact match required)
• Termination: PC Pins (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Secondary Substitution Criteria:

• Voltage rating (DC): Equal to or greater than 100V
• Voltage rating (AC): Equal to or greater than 65V
• Physical dimensions: Compatible with PCB layout constraints
• Lead spacing: Compatible with 0.402" (10.20mm) spacing or adjustable within assembly tolerance

Substitute parts must satisfy all primary criteria and meet or exceed secondary criteria to ensure functional equivalence and PCB compatibility.

Parameter Comparison

Engineering Selection Recommendations

DMT1S33K-F (Recommended Primary Substitute)

The DMT1S33K-F is the direct functional equivalent of the obsolete DMT1S33K. Both components share identical electrical specifications: 0.033 µF capacitance, ±10% tolerance, 100V DC / 65V AC voltage ratings, and polyester metallized dielectric construction. Physical dimensions and lead spacing are identical. The DMT1S33K-F is currently in active production status with ROHS3 compliance, making it suitable for new designs and legacy system replacements where voltage requirements remain at 100V DC or below.

DMM4S33K-F (Higher Voltage Alternative)

The DMM4S33K-F provides identical capacitance and tolerance specifications with elevated voltage ratings of 400V DC / 200V AC. This substitute is applicable in designs where higher voltage margins are required or where circuit voltage specifications exceed the original 100V DC rating. The lead spacing differs by 0.008" (0.20mm), requiring PCB layout verification. The DMM4S33K-F carries ROHS3 compliance and MSL rating 1 status.

Selection between these substitutes depends on circuit voltage requirements and PCB layout constraints. Both are active production components with current availability.

Frequently Asked Questions (FAQ)

Q: Can DMT1S33K-F be used as a direct replacement for DMT1S33K?

A: Yes. The DMT1S33K-F is electrically and mechanically identical to the obsolete DMT1S33K. Both components have 0.033 µF capacitance, ±10% tolerance, 100V DC rating, identical physical dimensions, and 0.402" lead spacing. The primary difference is product status: DMT1S33K-F is in active production with ROHS3 compliance.

Q: What is the difference between DMT1S33K-F and DMM4S33K-F?

A: Both components share the same 0.033 µF capacitance and ±10% tolerance. The primary differences are voltage ratings and lead spacing. DMT1S33K-F is rated 100V DC / 65V AC with 0.402" lead spacing. DMM4S33K-F is rated 400V DC / 200V AC with 0.394" lead spacing. Select DMM4S33K-F only if higher voltage operation is required.

Q: Is lead spacing compatibility critical when substituting DMM4S33K-F?

A: Lead spacing differs by 0.008" (0.20mm) between DMT1S33K-F (0.402") and DMM4S33K-F (0.394"). PCB hole patterns must be verified for compatibility. If the original PCB is designed for 0.402" spacing, DMT1S33K-F is the appropriate selection. DMM4S33K-F requires PCB layout confirmation.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both DMT1S33K-F and DMM4S33K-F are ROHS3 compliant. The original DMT1S33K is listed as RoHS non-compliant, making either substitute suitable for applications requiring RoHS compliance.

Q: What is the operating temperature range for these components?

A: All three components (DMT1S33K, DMT1S33K-F, and DMM4S33K-F) operate across -55°C to 125°C. Temperature performance is identical across all options.

Q: Can these capacitors be used in AC applications?

A: Yes. All components are rated for AC operation: DMT1S33K and DMT1S33K-F at 65V AC, and DMM4S33K-F at 200V AC. AC voltage ratings must not be exceeded in circuit design.