S1812-103K Equivalent & Substitute Parts

Part Overview

The S1812-103K is a fixed surface mount inductor manufactured by API Delevan Inc. with a nominal inductance of 10 µH, rated for 333 mA continuous current, and a maximum DC resistance of 1.8 Ohm. The component features ferrite core shielding and is housed in a 1812 (4532 Metric) package. This inductor is classified as Active product status and is suitable for applications requiring compact, shielded inductive filtering in the 2.5 MHz frequency range. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and compliance options for procurement and manufacturing workflows.

Substiute Parts

S1812-103K

API Delevan Inc.In Stock: 1144S1812-103K Datasheet

Current PartRFQ

S1812R-103K

API Delevan Inc.In Stock: 5049S1812R-103K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S1812-103K are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

• Inductance: 10 µH
• Tolerance: ±10%
• Current Rating: 333 mA
• DC Resistance: 1.8 Ohm Max
• Q Factor: 50 @ 2.5 MHz
• Self Resonant Frequency: 25 MHz
• Operating Temperature Range: -55°C ~ 125°C

Mechanical Parameters (Must Match):

• Package / Case: 1812 (4532 Metric)
• Mounting Type: Surface Mount
• Core Material: Ferrite
• Shielding: Shielded

Allowed Variations:

• Series designation (S1812 vs. S1812R)
• RoHS compliance status
• Inventory availability

The S1812R-103K is identified as a direct substitute based on identical electrical and mechanical specifications. Variations in RoHS compliance and series designation do not affect functional interchangeability in applications where the specified electrical and thermal parameters are required.

Parameter Comparison

Engineering Selection Recommendations

S1812-103K Selection Criteria: The S1812-103K is appropriate for applications where RoHS non-compliant components are acceptable or required by design specification. This part maintains Active product status and is available in inventory (1132 Pcs).

S1812R-103K Selection Criteria: The S1812R-103K is the preferred substitute when ROHS3 compliance is a procurement or regulatory requirement. This variant is functionally identical to the S1812-103K across all electrical and mechanical parameters. The S1812R-103K offers higher inventory availability (5029 Pcs) and is recommended for new designs targeting RoHS3 compliance standards.

Compliance Considerations: Both parts are classified as REACH Unaffected and carry ECCN EAR99 designation. The primary differentiation between the two parts is RoHS compliance status. Selection between S1812-103K and S1812R-103K should be based on project compliance requirements and supply chain constraints.

Frequently Asked Questions (FAQ)

Q: Are S1812-103K and S1812R-103K electrically interchangeable?

A: Yes. Both parts have identical inductance (10 µH), current rating (333 mA), DC resistance (1.8 Ohm Max), Q factor (50 @ 2.5 MHz), and operating temperature range (-55°C ~ 125°C). They are direct electrical equivalents.

Q: Can S1812R-103K be used as a drop-in replacement for S1812-103K?

A: Yes. The S1812R-103K is mechanically and electrically identical to the S1812-103K. Both use the same 1812 (4532 Metric) package with identical dimensions (0.177" L x 0.126" W, 4.50mm x 3.20mm) and height (0.134" / 3.40mm). No PCB layout modifications are required.

Q: What is the difference between S1812-103K and S1812R-103K?

A: The primary difference is RoHS compliance status. The S1812-103K is RoHS non-compliant, while the S1812R-103K is ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Which part should be selected for new designs?

A: Selection depends on project compliance requirements. For designs requiring RoHS3 compliance, specify S1812R-103K. For applications where RoHS compliance is not required, either part is acceptable based on availability and cost considerations.

Q: Are there any thermal or frequency performance differences between these parts?

A: No. Both parts operate across the same temperature range (-55°C ~ 125°C), have identical Q factors (50 @ 2.5 MHz), and identical self-resonant frequency (25 MHz).

Q: What is the Moisture Sensitivity Level (MSL) for these inductors?

A: Both S1812-103K and S1812R-103K have MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.