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SCRH4D14R-470 Equivalent & Substitute Parts
Part Overview
The SCRH4D14R-470 is a 47 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 390 mA and maximum DC resistance of 1.65 Ohm. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance within the specified parameter tolerances while meeting current manufacturing and compliance standards.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 47 µH |
| Current Rating | 390 mA |
| DC Resistance (DCR) | 1.65 Ohm Max |
| Shielding | Shielded |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 125°C |
| Inductance Tolerance | ±30% |
| Package Type | Nonstandard |
Substitute Part Grouping Explanation
Substitution eligibility for the SCRH4D14R-470 is determined by the following critical parameters:
- Inductance Value: Must be 47 µH to maintain circuit functionality
- Current Rating: Minimum 390 mA to support design current requirements
- Shielding: Must be shielded to prevent electromagnetic interference
- Mounting Type: Must be surface mount for PCB compatibility
- DC Resistance: Lower DCR values are acceptable; higher values may impact circuit performance
- Operating Temperature: Must support the -40°C ~ 125°C range or a subset thereof
- RoHS and Compliance: Must meet ROHS3 compliance and REACH requirements
The VLCF4020T-470MR39 from TDK Corporation satisfies these substitution criteria with equivalent inductance, current rating, shielding, and mounting specifications.
Parameter Comparison
| Parameter | SCRH4D14R-470 (Main Part) | VLCF4020T-470MR39 (Substitute) | Compatibility |
|---|---|---|---|
| Manufacturer | Signal Transformer | TDK Corporation | Different manufacturer |
| Inductance | 47 µH | 47 µH | Equivalent |
| Inductance Tolerance | ±30% | ±20% | Substitute has tighter tolerance |
| Current Rating (Amps) | 390 mA | 390 mA | Equivalent |
| Current - Saturation (Isat) | 220 mA | 390 mA | Substitute has higher saturation current |
| DC Resistance (DCR) | 1.65 Ohm Max | 934 mOhm Max | Substitute has lower DCR |
| Shielding | Shielded | Shielded | Equivalent |
| Mounting Type | Surface Mount | Surface Mount | Equivalent |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 105°C | Substitute has narrower upper limit |
| Size / Dimension | 0.161" L x 0.161" W (4.10mm x 4.10mm) | 0.157" L x 0.157" W (4.00mm x 4.00mm) | Physically similar, minor dimensional variance |
| Height - Seated (Max) | 0.059" (1.50mm) | 0.079" (2.00mm) | Substitute is taller |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Equivalent |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Equivalent |
| Product Status | Obsolete | Active | Substitute is in active production |
Engineering Selection Recommendations
The VLCF4020T-470MR39 is a suitable substitute for the obsolete SCRH4D14R-470 based on the following factors:
- Both components meet ROHS3 compliance and REACH requirements
- Electrical specifications align: 47 µH inductance, 390 mA current rating, and shielded construction
- The substitute exhibits superior DC resistance performance (934 mOhm vs. 1.65 Ohm), reducing power dissipation
- The substitute maintains unlimited moisture sensitivity rating (MSL 1)
- Active product status of the substitute ensures long-term availability and supply chain stability
Design considerations for implementation:
- Verify PCB layout accommodates the substitute's increased height (2.00mm vs. 1.50mm)
- Confirm that the operating temperature upper limit of 105°C meets application requirements; if temperatures exceed 105°C, alternative substitutes must be evaluated
- The tighter inductance tolerance (±20%) of the substitute may improve circuit performance consistency
Frequently Asked Questions (FAQ)
Q: Can the VLCF4020T-470MR39 directly replace the SCRH4D14R-470 in existing designs?
A: Yes, provided PCB layout accommodates the 0.5mm height difference and the application does not require sustained operation above 105°C. Electrical performance is compatible.
Q: What is the significance of the lower DC resistance in the substitute part?
A: Lower DC resistance (934 mOhm vs. 1.65 Ohm) reduces resistive losses and heat generation during operation, improving overall circuit efficiency.
Q: Why does the substitute have a narrower operating temperature range?
A: The VLCF4020T-470MR39 is rated to 105°C maximum, compared to the original part's 125°C. Applications requiring operation above 105°C must verify compatibility or identify alternative substitutes.
Q: Are there physical footprint compatibility concerns?
A: The footprint dimensions are nearly identical (4.10mm vs. 4.00mm), but the substitute is 0.5mm taller. PCB clearance must be verified to prevent mechanical interference.
Q: What is the difference in saturation current between these parts?
A: The original part saturates at 220 mA, while the substitute saturates at 390 mA. The substitute provides higher saturation margin relative to the 390 mA rated current.
Q: Are both parts compliant with current regulatory standards?
A: Yes, both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
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