SCH114-331 Equivalent & Substitute Parts

Part Overview

The SCH114-331 is a 330 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer. Rated for 560 mA continuous current with a maximum DC resistance of 1.22Ohm, this component is designed for applications requiring fixed inductance in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when application requirements necessitate alternative electrical or mechanical characteristics.

Substiute Parts

SCH114-331

Signal TransformerIn Stock: 925SCH114-331 Datasheet

Current PartRFQ

B82475M1334K000

EPCOS - TDK ElectronicsIn Stock: 1270B82475M1334K000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCH114-331 is determined by the following critical parameters:

• Inductance Value: Must be 330 µH with ±10% tolerance
• Current Rating: Minimum 560 mA continuous current capability
• Saturation Current (Isat): Minimum 700 mA to maintain performance margin
• DC Resistance: Maximum 1.22Ohm to ensure acceptable power dissipation
• Mounting Type: Surface Mount configuration required
• Shielding: Unshielded construction
• Operating Temperature: Must support -40°C to 125°C range
• RoHS Compliance: ROHS3 Compliant status required

The identified substitute part B82475M1334K000 meets these core substitution criteria while introducing variations in core material (ferrite drum core versus standard wirewound), physical dimensions, and extended temperature range capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (SCH114-331): Select when standard wirewound construction is specified and current requirements demand the full 560 mA rating with 700 mA saturation margin. This part is suitable for general industrial applications within the -40°C to 125°C operating window.

Substitute Part (B82475M1334K000): This EPCOS - TDK Electronics component is appropriate when:

• Extended temperature operation to 150°C is required
• Automotive-grade qualification (AEC-Q200) is mandated
• Lower DC resistance (1.15Ohm) provides design advantage
• Application current requirements do not exceed 520 mA continuous or 550 mA saturation

The substitute part introduces physical dimension variations: 1.0mm reduction in width and 0.90mm increase in height. PCB layout verification is necessary to confirm mechanical fit. The reduced current ratings (40 mA continuous, 150 mA saturation) represent the primary electrical constraint for substitution eligibility.

Both parts maintain identical inductance value, tolerance, shielding configuration, mounting type, and compliance status, establishing the foundation for substitution viability.

Frequently Asked Questions (FAQ)

Q: Can B82475M1334K000 replace SCH114-331 in all applications?

A: Substitution is valid only when application current requirements do not exceed 520 mA continuous operation or 550 mA saturation current. The SCH114-331 provides higher current capacity (560 mA / 700 mA). Verify actual circuit current draw before substitution.

Q: What are the physical dimension differences between these parts?

A: The B82475M1334K000 is 1.0mm narrower (9.40mm vs 10.40mm width) and 0.90mm taller (5.80mm vs 4.90mm height). Length remains identical at 10.40mm. Confirm PCB footprint and clearance space accommodate the taller profile.

Q: Are both parts RoHS compliant?

A: Yes. Both SCH114-331 and B82475M1334K000 are ROHS3 Compliant with MSL rating of 1 (Unlimited moisture sensitivity). Both are REACH Unaffected.

Q: What is the significance of AEC-Q200 rating on the substitute part?

A: AEC-Q200 is an automotive industry qualification standard. The B82475M1334K000 meets this specification; the SCH114-331 does not list this rating. Select the substitute when automotive-grade components are contractually required.

Q: How do the DC resistance values affect circuit performance?

A: The B82475M1334K000 has lower maximum DC resistance (1.15Ohm vs 1.22Ohm). This reduces resistive losses and heat generation. Both values are within acceptable range for most applications; the substitute provides marginal efficiency improvement.

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

A: The B82475M1334K000 supports operation to 150°C, exceeding the SCH114-331 maximum of 125°C. For applications requiring sustained operation above 125°C, the substitute is the appropriate selection.

Q: What core material differences exist between these inductors?

A: The SCH114-331 uses standard wirewound construction. The B82475M1334K000 employs drum core ferrite wirewound construction. Both are unshielded. The ferrite core design contributes to the substitute's extended temperature capability and lower DC resistance.