CF453215-4R7K Equivalent & Substitute Parts

Part Overview

The CF453215-4R7K is a 4.7 µH shielded multilayer inductor manufactured by Bourns Inc., rated for 315 mA with a maximum DC resistance of 1 Ohm. This component is designed for surface mount applications in the 1812 (4532 Metric) package format. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and design requirements.

Substiute Parts

CF453215-4R7K

Bourns Inc.In Stock: 863CF453215-4R7K Datasheet

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CM453232-4R7KL

Bourns Inc.In Stock: 25210CM453232-4R7KL Datasheet

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3613C4R7K

TE Connectivity Passive ProductIn Stock: 23773613C4R7K Datasheet

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74476604

Würth ElektronikIn Stock: 648074476604 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CF453215-4R7K is determined by the following critical parameters: inductance value (4.7 µH), current rating (315 mA), DC resistance (1 Ohm maximum), tolerance (±10%), package format (1812/4532 Metric), and operating temperature range compatibility. All substitute parts listed maintain these core electrical specifications and the same physical package footprint, ensuring mechanical and electrical interchangeability within the specified operating conditions.

The primary distinction among substitutes is the shielding configuration. The CF453215-4R7K features shielding, while the listed substitutes (CM453232-4R7KL, 3613C4R7K, and 74476604) are unshielded designs. This difference affects electromagnetic interference characteristics but does not alter the fundamental inductance, current handling, or resistance parameters.

Parameter Comparison

Engineering Selection Recommendations

CM453232-4R7KL (Bourns Inc.) is the primary substitute option. It maintains identical electrical specifications and is manufactured by the same supplier as the main part. This part is active in production with substantial inventory availability. The operating temperature range (-40°C ~ 125°C) is compatible with most applications requiring the CF453215-4R7K, with the exception of designs requiring the full -55°C lower limit. The increased seated height (3.40mm vs. 1.70mm) must be verified against PCB layout constraints.

74476604 (Würth Elektronik) is an alternative substitute with active product status and ROHS3 compliance. This part offers a higher self-resonant frequency (95 MHz vs. 35 MHz), which may provide advantages in high-frequency applications. The operating temperature range (-40°C ~ 105°C) is narrower than the main part. Seated height is 3.60mm, requiring PCB clearance verification.

3613C4R7K (TE Connectivity Passive Product) is available as a substitute but has the most restrictive operating temperature range (-30°C ~ 100°C) and is subject to REACH regulations. This part should be selected only when the narrower temperature range is acceptable and REACH compliance is required by application standards.

Frequently Asked Questions (FAQ)

Q: Can unshielded substitutes replace the shielded CF453215-4R7K?

A: Electrically, yes. All substitute parts maintain the same inductance, current rating, and DC resistance. However, the shielding difference affects electromagnetic interference characteristics. Unshielded designs may introduce or be susceptible to EMI in sensitive applications. Circuit-level testing is necessary to confirm performance in the specific application environment.

Q: What is the impact of the height difference between the main part and substitutes?

A: The CF453215-4R7K has a seated height of 0.067" (1.70mm), while substitutes range from 0.134" to 0.142" (3.40mm to 3.60mm). This difference requires verification against PCB layout, component stacking, and enclosure clearance specifications. Mechanical redesign may be necessary if height constraints are critical.

Q: Are all substitutes compatible with the full operating temperature range of the CF453215-4R7K?

A: No. The CF453215-4R7K operates from -55°C to 125°C. CM453232-4R7KL and 74476604 support -40°C to 125°C and -40°C to 105°C respectively, reducing the lower temperature limit. The 3613C4R7K is limited to -30°C to 100°C. Application requirements must be evaluated against each substitute's temperature range.

Q: What is the significance of the self-resonant frequency difference?

A: The CF453215-4R7K and most substitutes have a self-resonant frequency of 35 MHz, except 74476604 at 95 MHz. Higher self-resonant frequency indicates better high-frequency performance and reduced parasitic effects at elevated frequencies. Selection depends on the circuit's operating frequency and bandwidth requirements.

Q: Are there compliance differences between substitutes?

A: Yes. CM453232-4R7KL and 74476604 are REACH Unaffected, while 3613C4R7K is REACH Affected. All are ROHS3 Compliant. Applications subject to REACH regulations should prioritize CM453232-4R7KL or 74476604 to avoid additional compliance documentation requirements.

Q: What inventory considerations apply to these substitutes?

A: CM453232-4R7KL has the highest inventory (25,200 pcs), followed by 74476604 (6,400 pcs) and 3613C4R7K (2,365 pcs). Availability may influence selection for high-volume production requirements.