CSHB0421-3R3M Equivalent & Substitute Parts

Part Overview

The CSHB0421-3R3M is a 3.3 µH shielded molded inductor manufactured by CODACA, designed for power choke applications in surface mount configurations. This component features a 5 A current rating with a maximum DC resistance of 36.8 mOhm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic applications requiring regulated power distribution and EMI filtering.

Substitute components are identified when equivalent electrical and mechanical parameters are maintained within the specified tolerances and operational limits of the original design.

Substiute Parts

CSHB0421-3R3M

CODACAIn Stock: 1906CSHB0421-3R3M Datasheet

Current PartRFQ

CSHB0421-3R3M

CODACAIn Stock: 1906CSHB0421-3R3M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the CSHB0421-3R3M are determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Inductance value of 3.3 µH with ±20% tolerance
• Current rating of 5 A minimum
• Saturation current (Isat) of 5 A
• DC resistance not exceeding 36.8 mOhm

Mechanical & Physical Parameters:

• Shielded construction
• Molded type with magnetic powder core
• Surface mount configuration
• Nonstandard package dimensions: 0.173" L x 0.165" W (4.40mm x 4.20mm)
• Maximum seated height of 0.083" (2.10mm)

Environmental & Compliance Parameters:

• Operating temperature range of -40°C to 125°C
• ROHS3 compliance
• REACH unaffected status
• Moisture sensitivity level 1 (unlimited)

Test Conditions:

• Inductance measured at 100 kHz test frequency

Components meeting all specified parameters within stated tolerances are classified as parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

The CSHB0421-3R3M maintains Active product status with full ROHS3 compliance and REACH unaffected designation, confirming its suitability for current and future production applications. The component's Moisture Sensitivity Level 1 classification indicates unlimited shelf life without special storage requirements, reducing supply chain complexity.

Selection of substitute components must maintain identical electrical performance across the 5 A current rating and 3.3 µH inductance specification. The maximum DC resistance of 36.8 mOhm establishes the upper thermal dissipation limit and must not be exceeded in substitute selection.

Physical compatibility requires exact dimensional matching for the nonstandard 4.40mm x 4.20mm footprint with 2.10mm maximum height to ensure proper PCB assembly and thermal management. The shielded molded construction with magnetic powder core is mandatory for EMI suppression in power choke applications.

Temperature range equivalence from -40°C to 125°C must be maintained to support the full operational envelope of the host system. Compliance certifications (ROHS3, REACH unaffected) are non-negotiable for regulated markets and supply chain acceptance.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the CSHB0421-3R3M?

A: A valid substitute must match all electrical parameters (3.3 µH inductance at ±20% tolerance, 5 A current rating, 5 A saturation current, 36.8 mOhm maximum DC resistance), physical dimensions (4.40mm x 4.20mm footprint, 2.10mm maximum height), construction type (shielded molded inductor with magnetic powder core), and compliance certifications (ROHS3, REACH unaffected). The component must operate across -40°C to 125°C and be packaged in Tape & Reel format.

Q: Can I use a component with lower DC resistance than 36.8 mOhm?

A: Yes. A lower DC resistance value is acceptable as it represents improved electrical performance with reduced thermal dissipation. The 36.8 mOhm specification establishes the maximum allowable resistance; lower values do not compromise circuit function.

Q: Are different package types acceptable as substitutes?

A: No. The nonstandard 4.40mm x 4.20mm package with 2.10mm maximum height is specific to this design. Different package dimensions will not fit the PCB footprint and cannot be used as direct substitutes.

Q: What is the significance of the 100 kHz test frequency?

A: The 100 kHz test frequency is the standard measurement condition at which the 3.3 µH inductance value is verified. Substitute components must be characterized at this same frequency to ensure equivalent performance in the application circuit.

Q: Does the ±20% inductance tolerance affect substitute selection?

A: The ±20% tolerance defines the acceptable range of inductance variation for the CSHB0421-3R3M itself. Substitute components must also maintain this same tolerance specification. Both the main part and substitute must deliver inductance values between 2.64 µH and 3.96 µH.

Q: Is the Moisture Sensitivity Level 1 rating important for handling?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. This eliminates the need for special desiccant packaging or bake-out procedures before assembly, simplifying logistics and reducing component preparation time.

Q: Can I substitute with a non-shielded inductor?

A: No. The shielded construction is mandatory for this application. Shielding reduces electromagnetic interference and prevents coupling to adjacent circuits. Non-shielded alternatives will not provide equivalent EMI performance.