Request Quote
(Ships tomorrow)
CDRH125-331MC Equivalent & Substitute Parts
Part Overview
The CDRH125-331MC is a 330 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 680 mA continuous current with a maximum DC resistance of 510 mOhm. This component operates across the temperature range of -25°C to 80°C and is classified as obsolete product status.
Due to its obsolete classification, equivalent and substitute parts from active manufacturers are necessary for new designs, production continuity, and long-term component availability. The substitute parts listed maintain the core electrical specifications while offering improved product status, compliance certifications, and extended operating temperature ranges.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Inductance | 330 | µH |
| Inductance Tolerance | ±20% | — |
| Current Rating | 680 | mA |
| DC Resistance (DCR) Maximum | 510 | mOhm |
| Shielding | Shielded | — |
| Mounting Type | Surface Mount | — |
| Package Size | 12.00 × 12.00 × 6.00 | mm |
| Operating Temperature | -25 to 80 | °C |
| Inductance Test Frequency | 1 | kHz |
| RoHS Status | Non-compliant | — |
Substitute Part Grouping Explanation
Substitution of the CDRH125-331MC is determined by strict equivalence across the following critical parameters:
Primary Equivalence Criteria:
- Inductance value: 330 µH
- Inductance tolerance: ±20%
- Current rating: minimum 680 mA
- DC resistance: maximum 510 mOhm
- Shielding: Shielded configuration
- Mounting type: Surface Mount
- Package footprint: 12.00 × 12.00 mm nominal dimensions
- Height: 6.00 mm maximum seated height
Substitution Categories:
Direct Equivalents maintain identical electrical specifications and physical dimensions. These parts are interchangeable without circuit modification.
Compatible Substitutes exceed the minimum current rating or provide lower DC resistance while maintaining the same inductance, tolerance, and physical footprint. These parts provide enhanced performance margins.
Similar Alternatives maintain core electrical specifications but may have minor dimensional variations within the nonstandard package classification or different core material compositions. These require footprint verification before implementation.
Parameter Comparison
| Part Number | Manufacturer | Inductance (µH) | Current Rating (mA) | DCR Max (mOhm) | Size L×W (mm) | Height (mm) | Operating Temp (°C) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| CDRH125-331MC | Sumida | 330 | 680 | 510 | 12.00 × 12.00 | 6.00 | -25 to 80 | Obsolete | Non-compliant |
| CDRH125NP-331MC | Sumida | 330 | 680 | 510 | 12.00 × 12.00 | 6.00 | -40 to 100 | Active | ROHS3 Compliant |
| PA4304.334NLT | Pulse Electronics | 330 | 680 | 510 | 12.50 × 12.50 | 6.00 | -40 to 125 | Active | ROHS3 Compliant |
| P1170.334NLT | Pulse Electronics | 330 | 820 | 620 | 12.24 × 12.24 | 6.00 | -40 to 130 | Active | ROHS3 Compliant |
| 744771233 | Würth Elektronik | 330 | 780 | 510 | 12.00 × 12.00 | 6.00 | -40 to 125 | Active | ROHS3 Compliant |
| B82477G2334M000 | EPCOS - TDK Electronics | 330 | 680 | 510 | 12.30 × 12.30 | 6.00 | -55 to 125 | Active | ROHS3 Compliant |
| DR125-331-R | Eaton - Electronics Division | 330 | 1060 | 482 | 12.50 × 12.50 | 6.00 | -40 to 125 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: CDRH125NP-331MC
The CDRH125NP-331MC from Sumida America Components Inc. is the direct functional equivalent of the obsolete CDRH125-331MC. This part maintains identical electrical specifications (330 µH, 680 mA, 510 mOhm DCR) and physical dimensions (12.00 × 12.00 × 6.00 mm). The CDRH125NP-331MC is classified as Active product status with ROHS3 compliance and extends the operating temperature range to -40°C to 100°C, providing improved environmental performance. This part is available in Tape & Reel packaging with 1900 units in stock.
Secondary Recommendation: B82477G2334M000
The B82477G2334M000 from EPCOS - TDK Electronics provides identical electrical specifications with an extended operating temperature range of -55°C to 125°C. Physical dimensions are 12.30 × 12.30 × 6.00 mm, representing a minor footprint increase within nonstandard package tolerances. This part is Active status with ROHS3 compliance and 2103 units in stock.
Alternative for Enhanced Current Margin: DR125-331-R
The DR125-331-R from Eaton - Electronics Division maintains the 330 µH inductance and 510 mOhm DCR specification while providing a significantly higher current rating of 1.06 A (1060 mA) with saturation current of 1.22 A. This part is suitable for applications requiring additional current headroom. Physical dimensions are 12.50 × 12.50 × 6.00 mm. Product status is Active with ROHS3 compliance and -40°C to 125°C operating range.
Alternative for Higher Current with Increased DCR: P1170.334NLT
The P1170.334NLT from Pulse Electronics provides 330 µH inductance with an elevated current rating of 820 mA and saturation current of 820 mA. DC resistance is 620 mOhm maximum, representing a 21.6% increase over the original specification. Physical dimensions are 12.24 × 12.24 × 6.00 mm. This part is Active status with ROHS3 compliance and -40°C to 130°C operating range.
Alternative with Matched Footprint and Enhanced Current: 744771233
The 744771233 from Würth Elektronik maintains the exact physical footprint (12.00 × 12.00 × 6.00 mm) with identical inductance and DCR specifications. Current rating is 780 mA with saturation current of 970 mA, providing a 14.7% current margin above the original specification. This part includes AEC-Q200 automotive qualification, operates across -40°C to 125°C, and is ROHS3 compliant with 10479 units in stock.
Frequently Asked Questions (FAQ)
Q: Can CDRH125NP-331MC be used as a direct replacement for CDRH125-331MC?
A: Yes. The CDRH125NP-331MC is a direct functional equivalent with identical inductance (330 µH), current rating (680 mA), DC resistance (510 mOhm maximum), and physical dimensions (12.00 × 12.00 × 6.00 mm). The primary differences are active product status, ROHS3 compliance, and extended operating temperature range (-40°C to 100°C versus -25°C to 80°C).
Q: What is the significance of the current rating difference between substitute parts?
A: Current rating indicates the maximum continuous current the inductor can handle without exceeding temperature limits. Parts with higher current ratings (such as DR125-331-R at 1.06 A or 744771233 at 780 mA) provide additional safety margin in applications operating near the 680 mA specification of the original part. Selection depends on actual circuit current requirements.
Q: How do DC resistance differences affect circuit performance?
A: DC resistance (DCR) represents resistive losses in the inductor windings. The original CDRH125-331MC specifies 510 mOhm maximum. Substitute parts with identical or lower DCR (such as DR125-331-R at 482 mOhm) reduce power dissipation and heat generation. Parts with higher DCR (such as P1170.334NLT at 620 mOhm) increase losses by approximately 21.6% and should be evaluated for thermal impact in the specific application.
Q: Are there footprint compatibility concerns with substitute parts?
A: The original CDRH125-331MC has a 12.00 × 12.00 mm footprint. Most substitute parts maintain this dimension or vary within 0.50 mm (12.24 to 12.50 mm). The 744771233 and CDRH125NP-331MC maintain the exact 12.00 × 12.00 mm footprint. All parts maintain 6.00 mm maximum height. Verify PCB pad layout before selecting parts with dimensional variations.
Q: What is the difference between "Direct Equivalent" and "Similar Alternative" classifications?
A: Direct equivalents (CDRH125NP-331MC, B82477G2334M000) maintain identical or superior electrical specifications with minimal dimensional variation. Similar alternatives (P1170.334NLT, DR125-331-R) may have higher current ratings, different DCR values, or slightly larger footprints but maintain the core 330 µH inductance specification. Selection depends on whether the application requires exact parameter matching or can accommodate enhanced performance characteristics.
Q: Why do some substitute parts have different inductance test frequencies?
A: Inductance test frequency affects measurement conditions. The original CDRH125-331MC uses 1 kHz test frequency. Some substitutes (P1170.334NLT, DR125-331-R) use 100 kHz testing. Both frequencies are standard industry practice. The 330 µH inductance value remains valid across both test conditions for these nonstandard package inductors.
Q: Is RoHS3 compliance mandatory for substitution?
A: RoHS3 compliance is not mandatory for substitution but is strongly recommended for new designs and production continuity. All active substitute parts listed are ROHS3 compliant. The original CDRH125-331MC is non-compliant, which is one reason for its obsolete status. Compliance requirements depend on end-product regulations and customer specifications.
Q: Can parts with higher saturation current ratings be used interchangeably?
A: Parts with higher saturation current ratings (such as 744771233 with Isat of 970 mA or DR125-331-R with Isat of 1.22 A) can be used in applications where the continuous current rating meets or exceeds circuit requirements. Saturation current represents the point at which inductance begins to degrade significantly. Higher saturation ratings provide additional margin but do not change the continuous current rating specification.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts