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SCRH127-120 Equivalent & Substitute Parts
Part Overview
The SCRH127-120 is a 12 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 5.1 A continuous current with a maximum DC resistance of 24.3 mOhm. This component is designed for applications requiring fixed inductance in compact nonstandard packages. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate qualified alternatives.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Inductance | 12 | µH |
| Inductance Tolerance | ±20 | % |
| Current Rating | 5.1 | A |
| DC Resistance (Max) | 24.3 | mOhm |
| Shielding | Shielded | — |
| Operating Temperature Range | -40 to 125 | °C |
| Mounting Type | Surface Mount | — |
| Package | Nonstandard | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SCRH127-120 is determined by the following critical parameters:
Inductance value must match at 12 µH with ±20% tolerance. DC resistance must not exceed 24.3 mOhm maximum to maintain circuit performance. Current rating must support the application requirements; the substitute part must carry sufficient current capacity. Shielding type must remain shielded to preserve electromagnetic isolation. Mounting type must be surface mount to ensure PCB compatibility. Package dimensions and height must be compatible with board layout constraints. Operating temperature range must encompass the application environment. RoHS3 compliance is mandatory for regulatory conformance.
The CDRH127NP-120MC from Sumida America Components Inc. qualifies as a direct substitute based on matching inductance, tolerance, DC resistance, shielding, mounting type, and RoHS3 compliance.
Parameter Comparison
| Parameter | SCRH127-120 (Signal Transformer) | CDRH127NP-120MC (Sumida) | Match Status |
|---|---|---|---|
| Inductance | 12 µH | 12 µH | Matched |
| Inductance Tolerance | ±20% | ±20% | Matched |
| Current Rating | 5.1 A | 4.9 A | Substitute Lower |
| DC Resistance (Max) | 24.3 mOhm | 24.3 mOhm | Matched |
| Shielding | Shielded | Shielded | Matched |
| Operating Temperature Range | -40 to 125°C | -40 to 100°C | Substitute Narrower |
| Mounting Type | Surface Mount | Surface Mount | Matched |
| Package / Case | Nonstandard | Nonstandard | Matched |
| Size / Dimension | 12.50 x 12.50 mm | 12.00 x 12.00 mm | Substitute Smaller |
| Height - Seated (Max) | 8.00 mm | 8.00 mm | Matched |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Matched |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Matched |
Engineering Selection Recommendations
The CDRH127NP-120MC is qualified as a substitute for the SCRH127-120 based on electrical parameter equivalence and regulatory compliance. Both parts maintain RoHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental conformance.
The substitute part exhibits a lower current rating of 4.9 A compared to the primary part's 5.1 A rating. Circuit design must verify that the application current does not exceed 4.9 A continuous operation.
The substitute part operates within a narrower temperature range of -40 to 100°C versus the primary part's -40 to 125°C range. Applications requiring operation above 100°C must use the primary SCRH127-120 part.
The substitute part has a smaller footprint of 12.00 x 12.00 mm compared to the primary part's 12.50 x 12.50 mm. PCB layout must accommodate the reduced dimensions; the smaller footprint may provide layout advantages in space-constrained designs.
Both parts maintain identical seated height of 8.00 mm, ensuring vertical clearance compatibility.
Frequently Asked Questions (FAQ)
Q: Can the CDRH127NP-120MC replace the SCRH127-120 in all applications?
A: The CDRH127NP-120MC is electrically equivalent for inductance, tolerance, and DC resistance. Substitution is valid only if the application current does not exceed 4.9 A and the operating temperature remains within -40 to 100°C. Applications requiring higher current or elevated temperature operation must use the primary SCRH127-120 part.
Q: What are the key differences between these two parts?
A: Current rating differs (5.1 A vs. 4.9 A), operating temperature range differs (-40 to 125°C vs. -40 to 100°C), and physical dimensions differ slightly (12.50 x 12.50 mm vs. 12.00 x 12.00 mm). All other electrical and compliance parameters are identical.
Q: Are both parts RoHS3 compliant?
A: Yes, both the SCRH127-120 and CDRH127NP-120MC are RoHS3 compliant with MSL rating of 1 (Unlimited).
Q: Does the smaller footprint of the CDRH127NP-120MC affect PCB layout?
A: The substitute part's 12.00 x 12.00 mm footprint is 0.5 mm smaller in each dimension compared to the primary part's 12.50 x 12.50 mm footprint. PCB land patterns must be verified for compatibility. The identical 8.00 mm seated height ensures vertical clearance equivalence.
Q: What is the inductance test frequency for both parts?
A: Both parts are tested at 1 kHz inductance frequency.
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