HT55BW333MC Equivalent & Substitute Parts

Part Overview

The HT55BW333MC is a 0.033 µF ceramic capacitor rated for 50V operation with X7R temperature coefficient characteristics, manufactured by KEMET. This component is classified as obsolete, indicating it is no longer in active production. The high-temperature operating range of -55°C to 200°C positions this capacitor for industrial and demanding thermal applications. Due to its obsolete status, identifying functionally equivalent substitute components is necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

HT55BW333MC

KEMETIn Stock: 1037HT55BW333MC Datasheet

Current PartRFQ

C330C333K2R5TA

KEMETIn Stock: 993C330C333K2R5TA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HT55BW333MC is determined by the following mandatory electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Capacitance value must equal 0.033 µF
• Voltage rating must be equal to or greater than 50V
• Temperature coefficient must be X7R to maintain capacitance stability characteristics
• Tolerance may be equal to or tighter than ±20%

Mechanical Compatibility Requirements:

• Mounting type must be Through Hole Radial
• Lead spacing must be 0.200" (5.08mm) to ensure PCB footprint compatibility
• Package style must be Radial configuration

Acceptable Variations:

• Physical dimensions may differ provided lead spacing remains 0.200" (5.08mm)
• Operating temperature range may be narrower or equal to the original specification
• Product status may transition from obsolete to active

The substitute part C330C333K2R5TA meets all mandatory electrical and mechanical compatibility criteria while offering improved specifications in voltage rating and tolerance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: C330C333K2R5TA

The C330C333K2R5TA is the recommended substitute for the obsolete HT55BW333MC based on the following engineering criteria:

1. Electrical Equivalence: Identical capacitance (0.033 µF) and temperature coefficient (X7R) ensure circuit performance equivalence. The higher voltage rating (200V vs. 50V) provides additional design margin without circuit impact.

2. Mechanical Compatibility: Lead spacing of 0.200" (5.08mm) maintains PCB footprint compatibility. Both components utilize radial through-hole mounting.

3. Production Status: The substitute is in active production, ensuring long-term availability and supply chain stability compared to the obsolete original part.

4. Compliance Status: The substitute carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

5. Tolerance Improvement: The ±10% tolerance of the substitute provides tighter capacitance control compared to the ±20% tolerance of the original part.

Design Consideration: The operating temperature range of the substitute (−55°C to 125°C) is narrower than the original part (−55°C to 200°C). Applications requiring sustained operation above 125°C require evaluation of thermal requirements against the substitute's specifications.

Frequently Asked Questions (FAQ)

Q: Can C330C333K2R5TA be used as a direct replacement for HT55BW333MC?

A: Yes, C330C333K2R5TA is electrically and mechanically compatible with HT55BW333MC for applications operating within the substitute's temperature range of −55°C to 125°C. The identical capacitance value, temperature coefficient, and lead spacing ensure functional equivalence in standard circuit applications.

Q: What is the difference between straight leads and formed leads?

A: Straight leads are pre-formed perpendicular to the capacitor body, while formed leads are bent to a specific angle. The PCB footprint spacing remains identical at 0.200" (5.08mm). Verify that the formed lead configuration of C330C333K2R5TA is compatible with your specific PCB hole pattern and assembly process.

Q: Why is the voltage rating of the substitute higher (200V vs. 50V)?

A: A higher voltage rating does not negatively impact circuit performance. The substitute operates safely at the original circuit voltage of 50V. The higher rating provides additional design margin and component robustness without affecting capacitance or circuit behavior.

Q: Is the narrower operating temperature range of the substitute a limitation?

A: The substitute operates from −55°C to 125°C, compared to the original part's −55°C to 200°C range. For applications requiring sustained operation above 125°C, the substitute is not suitable. For standard industrial and commercial applications operating within 125°C, the substitute is fully compatible.

Q: What does ROHS3 compliance mean for this substitute?

A: ROHS3 compliance indicates the substitute meets the Restriction of Hazardous Substances Directive, restricting the use of specific hazardous materials in electrical and electronic equipment. This ensures the substitute meets current environmental and regulatory standards for manufacturing and disposal.

Q: Are there other substitutes available for HT55BW333MC?

A: The C330C333K2R5TA is the primary substitute listed for this component. Additional substitutes may exist within KEMET's product portfolio or from other manufacturers; however, only C330C333K2R5TA is specified in the provided substitute list and meets all mandatory compatibility criteria.

Q: How do I verify compatibility before implementing the substitute?

A: Confirm the following parameters match your circuit requirements: capacitance value (0.033 µF), minimum voltage rating (50V or higher), temperature coefficient (X7R), and operating temperature range (−55°C to 125°C minimum). Verify PCB footprint compatibility with the 0.200" (5.08mm) lead spacing and formed lead configuration.