UP0.4C-680-R Equivalent & Substitute Parts

Part Overview

The UP0.4C-680-R is a 68 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 0.4C series. This surface mount component is rated for 450 mA continuous current with a maximum DC resistance of 1.1 Ohm and operates across the temperature range of -40°C to 85°C. The component is RoHS Compliant and carries an MSL rating of 1 (Unlimited). Substitute parts are identified when the main part becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from qualified alternatives meeting the same electrical and mechanical specifications.

Substiute Parts

UP0.4C-680-R

Eaton - Electronics DivisionIn Stock: 907UP0.4C-680-R Datasheet

Current PartRFQ

SDR6603-680M

Bourns Inc.In Stock: 1664SDR6603-680M Datasheet

DirectRFQ

SDR0603-680KL

Bourns Inc.In Stock: 970SDR0603-680KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP0.4C-680-R are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 68 µH (fixed requirement)
• Inductance tolerance: ±20% or tighter
• Core material: Ferrite, unshielded drum core wirewound construction
• Mounting type: Surface mount
• Current rating: Minimum 400 mA (allows parts rated at or above the main part's 450 mA specification)
• DC resistance: Maximum 1.1 Ohm or lower (lower DCR values are acceptable)
• Operating temperature range: Minimum -40°C to 85°C coverage
• Package dimensions: Physical footprint compatibility within nonstandard SMD envelope
• RoHS compliance: Active product status with current compliance certifications

Substitute Classification:

Direct Substitute - SDR6603-680M (Bourns Inc.): Meets all primary electrical parameters with 400 mA current rating, 860 mOhm DCR, ferrite core, unshielded construction, and identical physical dimensions (6.60mm x 4.45mm). Extended operating temperature to 125°C and ROHS3 compliance provide enhanced environmental performance.

Similar Substitute - SDR0603-680KL (Bourns Inc.): Meets core electrical specifications with 440 mA current rating, 720 mOhm DCR, and tighter ±10% inductance tolerance. Physical dimensions differ (5.80mm x 5.80mm footprint, 3.90mm height) requiring PCB layout verification. Extended operating temperature to 125°C and ROHS3 compliance are provided.

Parameter Comparison

Engineering Selection Recommendations

SDR6603-680M Selection Criteria:

The SDR6603-680M from Bourns Inc. is the primary direct substitute for the UP0.4C-680-R. This part maintains identical physical dimensions (6.60mm x 4.45mm footprint and 2.92mm seated height), enabling direct PCB layout compatibility without redesign. The 400 mA current rating is 50 mA lower than the main part; however, this remains acceptable for applications where the circuit operates below 400 mA continuous current. The DC resistance of 860 mOhm is superior to the main part's 1.1 Ohm maximum, resulting in lower power dissipation. Both parts carry MSL 1 (Unlimited) moisture sensitivity ratings and are RoHS compliant. The SDR6603-680M extends the operating temperature range to 125°C, providing enhanced thermal performance for applications requiring higher temperature operation. Active product status and ROHS3 compliance ensure long-term availability and regulatory alignment.

SDR0603-680KL Selection Criteria:

The SDR0603-680KL from Bourns Inc. is classified as a similar substitute when the primary direct substitute is unavailable or when design flexibility permits footprint changes. This part offers a tighter inductance tolerance of ±10% compared to the main part's ±20%, providing improved inductance accuracy. The 440 mA current rating closely matches the main part's 450 mA specification. The DC resistance of 720 mOhm is the lowest among all three parts, delivering superior electrical efficiency. The saturation current of 540 mA exceeds both the main part and the direct substitute. However, the physical dimensions differ significantly: the footprint is 5.80mm x 5.80mm (versus 6.60mm x 4.45mm) and the seated height is 3.90mm (versus 2.92mm). PCB layout verification is required before selection. Extended operating temperature to 125°C and ROHS3 compliance are provided. Active product status ensures availability.

Selection Decision Matrix:

• Direct PCB replacement without layout modification: Select SDR6603-680M
• Applications requiring current rating ≥ 450 mA: Verify circuit design; SDR6603-680M (400 mA) may not be suitable; consider SDR0603-680KL (440 mA) with layout verification
• Applications requiring inductance tolerance ±10% or tighter: Select SDR0603-680KL
• Applications requiring minimum DC resistance: Select SDR0603-680KL (720 mOhm)
• Applications with thermal constraints above 85°C: Both Bourns substitutes support -40°C to 125°C operation
• High-volume procurement: Verify current inventory levels; SDR6603-680M shows 1608 Pcs in stock; SDR0603-680KL shows 957 Pcs in stock

Frequently Asked Questions (FAQ)

Q1: Can SDR6603-680M be used as a direct replacement for UP0.4C-680-R without PCB modification?

A: Yes. The SDR6603-680M maintains identical physical dimensions (6.60mm x 4.45mm footprint, 2.92mm seated height) and mounting type (surface mount). No PCB layout changes are required. However, verify that the 400 mA current rating is sufficient for your application, as it is 50 mA lower than the main part's 450 mA specification.

Q2: What is the key difference between SDR6603-680M and SDR0603-680KL?

A: The primary differences are physical dimensions and inductance tolerance. SDR6603-680M maintains the same footprint as the main part (6.60mm x 4.45mm) with ±20% tolerance. SDR0603-680KL has a different footprint (5.80mm x 5.80mm) and greater height (3.90mm), but offers tighter ±10% inductance tolerance and lower DC resistance (720 mOhm versus 860 mOhm). SDR0603-680KL requires PCB layout verification.

Q3: Which substitute part has the lowest DC resistance?

A: SDR0603-680KL has the lowest DC resistance at 720 mOhm maximum, compared to 860 mOhm for SDR6603-680M and 1.1 Ohm for the main part UP0.4C-680-R. Lower DC resistance reduces power dissipation and heat generation in the inductor.

Q4: Are both substitute parts RoHS compliant?

A: Yes. Both SDR6603-680M and SDR0603-680KL are ROHS3 compliant, exceeding the RoHS Compliant status of the main part UP0.4C-680-R. Both parts are also REACH Unaffected and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q5: What is the saturation current difference between the parts?

A: The main part UP0.4C-680-R has Isat of 430 mA. SDR6603-680M has Isat of 400 mA (30 mA lower). SDR0603-680KL has Isat of 540 mA (110 mA higher). For applications operating near saturation limits, SDR0603-680KL provides the highest saturation margin.

Q6: Can SDR0603-680KL be used if the PCB has limited vertical clearance?

A: No. SDR0603-680KL has a seated height of 3.90mm, which is 0.98mm taller than both the main part and SDR6603-680M (2.92mm). If vertical clearance is constrained, SDR6603-680M is the appropriate choice.

Q7: Which substitute part is recommended for applications operating above 85°C?

A: Both substitute parts support extended operating temperature to 125°C. The main part UP0.4C-680-R is limited to -40°C to 85°C. For applications requiring operation above 85°C, select either SDR6603-680M or SDR0603-680KL depending on current rating and footprint requirements.

Q8: What is the inductance tolerance specification for each part?

A: UP0.4C-680-R and SDR6603-680M both specify ±20% inductance tolerance. SDR0603-680KL specifies tighter ±10% tolerance, providing improved inductance accuracy for precision applications.

Q9: Are there any frequency-dependent parameters provided for the main part?

A: The main part UP0.4C-680-R does not provide Q factor or self-resonant frequency specifications. SDR6603-680M provides Q of 18 @ 2.52MHz and self-resonant frequency of 11MHz. SDR0603-680KL provides Q of 17 @ 2.52MHz and self-resonant frequency of 12MHz. These parameters are available for the substitute parts only.

Q10: What packaging format is used for all three parts?

A: All three parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. All parts carry MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture control requirements during storage or handling.