UP0.4C-330-R Equivalent & Substitute Parts

Part Overview

The UP0.4C-330-R is a 33 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component operates at 640 mA rated current with a maximum DC resistance of 560 mOhm and is specified for applications requiring fixed inductance in the 33 µH range. The part is Active status and RoHS Compliant, suitable for industrial and commercial electronic applications operating between -40°C and 85°C. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative electrical or mechanical characteristics better suit specific application requirements.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20%	-
Current Rating	640	mA
DC Resistance (DCR) Maximum	560	mOhm
Saturation Current (Isat)	630	mA
Core Type	Ferrite Drum Core	-
Shielding	Unshielded	-
Operating Temperature Range	-40°C to 85°C	-
Mounting Type	Surface Mount	-
Physical Size	6.60 x 4.45 x 2.92	mm

Substitute Part Grouping Explanation

Substitute parts for the UP0.4C-330-R are qualified based on the following critical parameters:

Primary Substitution Criteria:

Inductance value: 33 µH (exact match required)
Inductance tolerance: ±20% or tighter
Current rating: minimum 580 mA (acceptable for applications rated up to 640 mA with thermal margin consideration)
DC resistance: 510 mOhm maximum or lower (lower resistance preferred for reduced losses)
Core type: Ferrite drum core or wirewound unshielded construction
Shielding: Unshielded (consistent with primary part)
Mounting: Surface mount, nonstandard package
Operating temperature: minimum -40°C to 85°C overlap required
RoHS compliance: Active status required

Identified Substitutes:

P0770.333NL (Pulse Electronics) qualifies as a substitute with identical inductance (33 µH), ±20% tolerance, and unshielded wirewound construction. Current rating of 580 mA is 90.6% of the primary part rating. DC resistance of 510 mOhm is 8.9% lower than the primary part maximum. Operating temperature range extends to 130°C, providing superior thermal performance. Physical dimensions and mounting type are identical.

SDR0603-330KL (Bourns Inc.) qualifies as a substitute with identical inductance (33 µH), tighter ±10% tolerance, and ferrite drum core construction matching the primary part type. Current rating of 610 mA is 95.3% of the primary part rating. DC resistance of 450 mOhm is 19.6% lower than the primary part maximum, providing superior electrical efficiency. Operating temperature range extends to 125°C. Physical dimensions differ slightly (5.80 x 5.80 x 3.90 mm versus 6.60 x 4.45 x 2.92 mm), requiring PCB layout verification.

Parameter Comparison

Parameter	UP0.4C-330-R (Eaton)	P0770.333NL (Pulse)	SDR0603-330KL (Bourns)
Inductance	33 µH	33 µH	33 µH
Inductance Tolerance	±20%	±20%	±10%
Current Rating	640 mA	580 mA	610 mA
Saturation Current (Isat)	630 mA	580 mA	700 mA
DC Resistance Maximum	560 mOhm	510 mOhm	450 mOhm
Core Type	Ferrite Drum Core	Wirewound	Ferrite Drum Core
Shielding	Unshielded	Unshielded	Unshielded
Operating Temperature	-40°C to 85°C	-40°C to 130°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Physical Size (L x W x H)	6.60 x 4.45 x 2.92 mm	6.60 x 4.45 x 2.92 mm	5.80 x 5.80 x 3.90 mm
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

P0770.333NL Selection Criteria: Select P0770.333NL when PCB layout constraints require identical physical dimensions (6.60 x 4.45 x 2.92 mm) and when application current requirements do not exceed 580 mA. This substitute provides lower DC resistance (510 mOhm) and extended operating temperature to 130°C. ROHS3 compliance and Active product status support long-term availability. Pulse Electronics manufacturing ensures consistent quality for production environments.

SDR0603-330KL Selection Criteria: Select SDR0603-330KL when tighter inductance tolerance (±10% versus ±20%) is required for precision circuit tuning or when application current requirements do not exceed 610 mA. This substitute provides the lowest DC resistance (450 mOhm), reducing power dissipation and heat generation. Ferrite drum core construction matches the primary part type. Extended operating temperature to 125°C and ROHS3 compliance support demanding applications. PCB layout modification is required due to different physical dimensions (5.80 x 5.80 x 3.90 mm).

Current Rating Consideration: Applications operating at or above 630 mA saturation current require the primary part UP0.4C-330-R. Both substitutes operate below this threshold and are suitable only for applications with maximum sustained current below 580 mA.

Thermal Performance: Both substitutes provide superior thermal operating ranges compared to the primary part. P0770.333NL extends to 130°C; SDR0603-330KL extends to 125°C, versus 85°C for UP0.4C-330-R.

Frequently Asked Questions (FAQ)

Q: Can P0770.333NL replace UP0.4C-330-R in all applications?

A: P0770.333NL is electrically compatible when application current does not exceed 580 mA. Physical dimensions are identical (6.60 x 4.45 x 2.92 mm), eliminating PCB layout changes. DC resistance is lower (510 mOhm versus 560 mOhm maximum), reducing power dissipation. Inductance value and tolerance (33 µH, ±20%) are identical. Verify application current requirements before substitution.

Q: What are the physical dimension differences between SDR0603-330KL and UP0.4C-330-R?

A: SDR0603-330KL measures 5.80 x 5.80 x 3.90 mm, while UP0.4C-330-R measures 6.60 x 4.45 x 2.92 mm. The substitute is smaller in length and width but taller in height. PCB footprint and component placement must be verified before substitution. Trace routing and thermal management may require adjustment.

Q: Does SDR0603-330KL provide better electrical performance?

A: SDR0603-330KL provides lower DC resistance (450 mOhm versus 560 mOhm maximum), resulting in reduced power dissipation and improved efficiency. Inductance tolerance is tighter (±10% versus ±20%), supporting precision applications. Saturation current is higher (700 mA versus 630 mA), providing greater current headroom. These characteristics make SDR0603-330KL suitable for efficiency-critical designs.

Q: Are all three parts RoHS compliant?

A: UP0.4C-330-R is RoHS Compliant. P0770.333NL and SDR0603-330KL are ROHS3 Compliant, representing the current RoHS standard. All three parts meet environmental compliance requirements for commercial and industrial applications.

Q: What is the maximum current for each part?

A: UP0.4C-330-R is rated for 640 mA continuous current with 630 mA saturation current. P0770.333NL is rated for 580 mA continuous current with 580 mA saturation current. SDR0603-330KL is rated for 610 mA continuous current with 700 mA saturation current. Application current requirements must not exceed the rated continuous current of the selected part.

Q: Can these parts be used interchangeably in high-temperature applications?

A: UP0.4C-330-R operates to 85°C maximum. P0770.333NL operates to 130°C maximum. SDR0603-330KL operates to 125°C maximum. For applications exceeding 85°C, P0770.333NL or SDR0603-330KL are required. Verify thermal management and component derating requirements for the specific application temperature profile.

Q: What packaging formats are available?

A: UP0.4C-330-R is supplied in Tape & Reel (TR) packaging. P0770.333NL packaging format is not specified in available data. SDR0603-330KL is supplied in Tape & Reel (TR) packaging. Confirm packaging requirements with supplier for production volume orders.

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