SC3316F-101 Equivalent & Substitute Parts

Part Overview

The SC3316F-101 is a 100 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 1.3 A continuous current with a maximum DC resistance of 280mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 891 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

SC3316F-101

Signal TransformerIn Stock: 953SC3316F-101 Datasheet

Current PartRFQ

DR124-101-R

Eaton - Electronics DivisionIn Stock: 1938DR124-101-R Datasheet

MFR RecommendedRFQ

UP2B-101-R

Eaton - Electronics DivisionIn Stock: 1232UP2B-101-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC3316F-101 is determined by the following critical parameters:

• Inductance Value: Must be 100 µH with ±20% tolerance
• Current Rating: Minimum 1.3 A continuous current capability
• Saturation Current (Isat): Minimum 1.2 A to maintain performance under transient conditions
• DC Resistance: Maximum 280mOhm to ensure acceptable power dissipation
• Mounting Type: Surface mount configuration required
• Operating Temperature Range: Must support -40°C minimum and 125°C maximum
• Compliance: ROHS3 compliance required

Two substitute parts meet these criteria: DR124-101-R (shielded variant with enhanced current rating) and UP2B-101-R (unshielded variant with comparable DC resistance). Both maintain the 100 µH inductance specification and operate within the required temperature range.

Parameter Comparison

Engineering Selection Recommendations

DR124-101-R is suitable for applications requiring enhanced current handling capability. This shielded drum core inductor provides 1.5 A continuous current rating with 1.79 A saturation current, exceeding the SC3316F-101 specifications. The shielded construction reduces electromagnetic interference in sensitive circuit environments. Operating temperature range matches the original part (-40°C to 125°C). ROHS3 compliance and unlimited MSL rating are maintained. DC resistance of 308mOhm is within acceptable tolerance for this inductance class.

UP2B-101-R is suitable for space-constrained applications where unshielded construction is acceptable. This part provides the lowest DC resistance at 270.7mOhm maximum, reducing power dissipation. However, the saturation current of 950mA falls below the SC3316F-101 specification of 1.2A, and the maximum operating temperature is limited to 85°C compared to 125°C for the original part. This substitute is appropriate only for applications operating within the -40°C to 85°C temperature range and where saturation current requirements do not exceed 950mA.

Both substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating. Selection between substitutes depends on specific application requirements for shielding, current capacity, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can DR124-101-R replace SC3316F-101 in all applications?

A: DR124-101-R meets or exceeds all critical electrical parameters of SC3316F-101, including inductance, current rating, saturation current, and operating temperature range. The primary difference is the addition of shielding and a slight increase in DC resistance (308mOhm vs 280mOhm). Shielding may affect circuit layout in space-constrained designs. Mechanical dimensions differ slightly, requiring PCB footprint verification.

Q: What are the limitations of UP2B-101-R as a substitute?

A: UP2B-101-R has two significant limitations: saturation current of 950mA is below the SC3316F-101 specification of 1.2A, and maximum operating temperature is 85°C versus 125°C for the original part. This substitute is only suitable for applications operating within -40°C to 85°C and where peak current does not approach saturation levels.

Q: How do shielded and unshielded inductors differ in circuit performance?

A: Shielded inductors (DR124-101-R) reduce radiated electromagnetic interference and are less susceptible to external magnetic fields. Unshielded inductors (SC3316F-101 and UP2B-101-R) occupy less board space and typically have lower cost. Selection depends on EMI requirements and circuit layout constraints.

Q: Are packaging differences between these parts significant?

A: SC3316F-101 and UP2B-101-R use standard Tape & Reel (TR) packaging. DR124-101-R uses Cut Tape (CT) & Digi-Reel® packaging. Both packaging formats are compatible with standard pick-and-place assembly equipment. Reel configuration may affect supply chain logistics but does not impact component performance.

Q: What is the significance of the ±20% inductance tolerance?

A: The ±20% tolerance means actual inductance values may range from 80 µH to 120 µH. All three parts share this tolerance specification. Applications requiring tighter inductance control should specify parts with lower tolerance ratings if available.

Q: How should DC resistance differences affect component selection?

A: DC resistance directly impacts power dissipation and thermal performance. SC3316F-101 at 280mOhm and UP2B-101-R at 270.7mOhm have comparable resistance. DR124-101-R at 308mOhm will dissipate slightly more power at rated current. For high-current or thermally sensitive applications, lower DCR is preferable.