ISC1210ER330K Equivalent & Substitute Parts

Part Overview

The ISC1210ER330K is a 33 µH shielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1210 (3225 Metric) package. This component features an iron powder core with a maximum DC resistance of 5.1 Ohm and supports a current rating of 115 mA across an operating temperature range of -55°C to 125°C. The part is active and ROHS3 compliant. Equivalent and substitute parts are identified based on matching inductance value, package form factor, shielding characteristics, and core material compatibility within specified electrical tolerances.

Substiute Parts

ISC1210ER330K

Vishay DaleIn Stock: 780ISC1210ER330K Datasheet

Current PartRFQ

CMH322522-330KL

Bourns Inc.In Stock: 6570CMH322522-330KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISC1210ER330K are identified based on the following critical parameters:

Matching Criteria:

• Inductance value of 33 µH with ±10% tolerance
• Package form factor 1210 (3225 Metric)
• Shielded drum core wirewound construction
• Surface mount mounting type
• Operating temperature range -55°C to 125°C
• ROHS3 compliance and REACH unaffected status

Allowable Variations:

• Core material (iron powder or ferrite)
• DC resistance within reasonable engineering limits
• Current rating (substitutes may have lower current ratings if application requirements permit)
• Self-resonant frequency and Q factor variations

The CMH322522-330KL from Bourns Inc. qualifies as a substitute based on matching inductance, package, shielding, and compliance specifications, despite differences in core material and current rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (ISC1210ER330K): The ISC1210ER330K is an active product with full ROHS3 compliance and REACH unaffected status. It provides 115 mA current rating with 5.1 Ohm maximum DC resistance. This part is suitable for applications requiring the specified current capacity and iron powder core characteristics.

Substitute Part (CMH322522-330KL): The CMH322522-330KL is an active product with equivalent ROHS3 compliance and REACH unaffected status. This substitute is suitable for applications where the 70 mA current rating is sufficient. The ferrite core material and 5.6 Ohm maximum DC resistance represent the primary electrical differences. Both parts maintain identical inductance values, package dimensions, shielding, and operating temperature ranges.

Selection between these parts depends on application current requirements. If the circuit design operates at or below 70 mA, the CMH322522-330KL provides a valid substitute. If the application requires the full 115 mA capacity, the ISC1210ER330K is the appropriate choice.

Frequently Asked Questions (FAQ)

Q: Can the CMH322522-330KL replace the ISC1210ER330K in all applications?

A: The CMH322522-330KL is a valid substitute only for applications where the maximum current requirement does not exceed 70 mA. The ISC1210ER330K supports 115 mA. If your circuit design operates within the 70 mA limit, substitution is permissible. If higher current is required, the ISC1210ER330K must be used.

Q: What is the difference between iron powder and ferrite core materials?

A: Both core materials are provided in the specifications. Iron powder cores (ISC1210ER330K) and ferrite cores (CMH322522-330KL) exhibit different frequency response characteristics and saturation properties. The self-resonant frequency differs (14.5 MHz versus 16 MHz). Selection depends on application frequency requirements and EMI characteristics.

Q: Are the physical dimensions identical?

A: Both parts use the 1210 (3225 Metric) package. Length and width are identical at 0.126" L x 0.098" W (3.20mm x 2.49mm for ISC1210ER330K and 3.20mm x 2.50mm for CMH322522-330KL). Height-seated maximum values are 0.095" (2.41mm) and 0.094" (2.40mm) respectively. These dimensions are functionally equivalent for PCB layout purposes.

Q: Do both parts meet environmental compliance requirements?

A: Yes. Both the ISC1210ER330K and CMH322522-330KL are ROHS3 compliant and REACH unaffected. Both carry Moisture Sensitivity Level 1 (Unlimited). Both are suitable for applications with environmental compliance requirements.

Q: What is the significance of the ±10% tolerance specification?

A: The ±10% tolerance applies to both parts. This means the actual inductance value will fall within the range of 29.7 µH to 36.3 µH. Both parts meet this specification, ensuring functional equivalence for circuit designs that account for this tolerance band.

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

A: The ISC1210ER330K has a maximum DC resistance of 5.1 Ohm, while the CMH322522-330KL has 5.6 Ohm maximum. This 0.5 Ohm difference results in slightly higher power dissipation in the substitute part. For applications sensitive to resistive losses, calculate the impact based on your specific current levels before substitution.