ISC1210ER2R7K Equivalent & Substitute Parts

Part Overview

The ISC1210ER2R7K is a 2.7 µH shielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1210 (3225 Metric) package. This component operates at 290 mA current rating with a maximum DC resistance of 1 Ohm and is rated for operating temperatures from -55°C to 125°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the specified tolerances and package constraints.

Key Parameters

Parameter	Value
Inductance	2.7 µH
Tolerance	±10%
Current Rating	290 mA
DC Resistance (DCR)	1 Ohm Max
Shielding	Shielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Q @ Frequency	30 @ 7.96 MHz
Frequency - Self Resonant	60 MHz

Substitute Part Grouping Explanation

Substitute parts for the ISC1210ER2R7K are qualified based on the following critical parameters:

Inductance value must match at 2.7 µH with ±10% tolerance. Current rating must be equal to or greater than 290 mA to ensure safe operation under specified load conditions. The package and case designation must be 1210 (3225 Metric) to ensure mechanical and electrical compatibility with the PCB layout and assembly process. Shielding type must remain shielded to maintain electromagnetic isolation. Operating temperature range must encompass -55°C to 125°C. DC resistance must not exceed 1 Ohm maximum to preserve circuit performance characteristics. Surface mount mounting type is required for compatibility with automated assembly equipment.

Parameter Comparison

Parameter	ISC1210ER2R7K (Vishay Dale)	CMH322522-2R7KL (Bourns Inc.)
Inductance	2.7 µH	2.7 µH
Tolerance	±10%	±10%
Current Rating (Amps)	290 mA	290 mA
DC Resistance (DCR)	1 Ohm Max	1.1 Ohm Max
Shielding	Shielded	Shielded
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Q @ Frequency	30 @ 7.96 MHz	30 @ 7.96 MHz
Frequency - Self Resonant	60 MHz	70 MHz
Type	Drum Core, Wirewound	Drum Core, Wirewound
Material - Core	Iron Powder	Ferrite
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.49mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.095" (2.41mm)	0.094" (2.40mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the ISC1210ER2R7K and CMH322522-2R7KL meet the core electrical requirements for 2.7 µH inductance at 290 mA current rating in the 1210 package format. Both components are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements for industrial and commercial applications. Both maintain MSL Level 1 (Unlimited) moisture sensitivity classification.

The primary difference between these parts is the DC resistance specification: the ISC1210ER2R7K specifies 1 Ohm maximum, while the CMH322522-2R7KL specifies 1.1 Ohm maximum. This 0.1 Ohm difference may be significant in applications where power dissipation or voltage drop across the inductor is a critical design parameter. The core material differs (Iron Powder versus Ferrite), which affects frequency response characteristics; the CMH322522-2R7KL exhibits a higher self-resonant frequency of 70 MHz compared to 60 MHz for the ISC1210ER2R7K.

Selection should be based on specific circuit requirements regarding DC resistance tolerance and frequency response characteristics. Both parts are active products with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the CMH322522-2R7KL replace the ISC1210ER2R7K in all applications?

A: The CMH322522-2R7KL is electrically compatible for inductance value and current rating. However, the 0.1 Ohm higher DC resistance and different core material (Ferrite versus Iron Powder) may affect performance in applications sensitive to power dissipation or specific frequency response characteristics. Verify DC resistance and frequency response requirements for your specific circuit.

Q: What is the significance of the different core materials?

A: The ISC1210ER2R7K uses Iron Powder core material, while the CMH322522-2R7KL uses Ferrite core material. These materials exhibit different magnetic properties and frequency characteristics. The Ferrite-core part (CMH322522-2R7KL) achieves a higher self-resonant frequency of 70 MHz versus 60 MHz for the Iron Powder core part.

Q: Are the physical dimensions compatible?

A: Both parts are specified for the 1210 (3225 Metric) package. Dimensions are nearly identical: length and width are 3.20mm x 2.49mm (ISC1210ER2R7K) and 3.20mm x 2.50mm (CMH322522-2R7KL), with maximum seated heights of 2.41mm and 2.40mm respectively. These minor variations are within standard PCB assembly tolerances.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the ISC1210ER2R7K and CMH322522-2R7KL are ROHS3 compliant, REACH unaffected, and classified as MSL Level 1 (Unlimited). Both carry ECCN EAR99 and HTSUS 8504.50.8000 classifications.

Q: What is the tolerance specification for inductance?

A: Both parts specify ±10% inductance tolerance at the 7.96 MHz test frequency. This tolerance applies to the 2.7 µH nominal inductance value.

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