1210-273J Fixed Inductor Equivalent & Substitute Parts

Part Overview

The 1210-273J is a fixed unshielded inductor manufactured by API Delevan Inc., designed for surface mount applications. This component delivers 27 µH inductance with a 193 mA current rating and 5Ohm maximum DC resistance in a compact 1210 (3225 Metric) package. The part is currently active in production with 1079 pieces available in new original stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same package form factor and performance specifications. Alternative models may be required due to inventory availability, supply chain considerations, or specific compliance requirements for end-application mandates.

Key Parameters

Parameter	Value	Unit
Inductance	27	µH
Inductance Tolerance	±5	%
Current Rating	193	mA
DC Resistance (Max)	5	Ohm
Q Factor @ 2.5 MHz	30	—
Self Resonant Frequency	18	MHz
Operating Temperature Range	-55 to 125	°C
Package / Case	1210 (3225 Metric)	—
Mounting Type	Surface Mount	—
Core Material	Ferrite	—
Shielding	Unshielded	—

Substitute Part Grouping Explanation

Substitute parts for the 1210-273J are qualified based on strict electrical and mechanical parameter equivalence. The substitution criteria are:

Electrical Parameters (Must Match):

Inductance: 27 µH
Inductance Tolerance: ±5%
Current Rating: 193 mA
DC Resistance: 5Ohm Maximum
Q Factor @ 2.5 MHz: 30
Self Resonant Frequency: 18 MHz
Operating Temperature Range: -55°C to 125°C

Mechanical Parameters (Must Match):

Package / Case: 1210 (3225 Metric)
Mounting Type: Surface Mount
Core Material: Ferrite
Shielding: Unshielded
Physical Dimensions: 0.128" L x 0.095" W (3.25mm x 2.42mm)
Height - Seated (Max): 0.101" (2.57mm)

The 1210R-273J from API Delevan Inc. meets all electrical and mechanical equivalence criteria and qualifies as a direct substitute.

Parameter Comparison

Parameter	1210-273J	1210R-273J	Match
Manufacturer	API Delevan Inc.	API Delevan Inc.	Yes
Inductance	27 µH	27 µH	Yes
Inductance Tolerance	±5%	±5%	Yes
Current Rating	193 mA	193 mA	Yes
DC Resistance (Max)	5 Ohm	5 Ohm	Yes
Q @ 2.5 MHz	30	30	Yes
Self Resonant Frequency	18 MHz	18 MHz	Yes
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Yes
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Core Material	Ferrite	Ferrite	Yes
Shielding	Unshielded	Unshielded	Yes
Size / Dimension	0.128" L x 0.095" W (3.25mm x 2.42mm)	0.128" L x 0.095" W (3.25mm x 2.42mm)	Yes
Height - Seated (Max)	0.101" (2.57mm)	0.101" (2.57mm)	Yes
Product Status	Active	Active	Yes
RoHS Status	RoHS non-compliant	ROHS3 Compliant	No
Inventory (Pcs)	1079	1916	—

Engineering Selection Recommendations

1210-273J Selection Criteria:

Use when RoHS non-compliant status is acceptable for the application
Current inventory: 1079 pieces available
Suitable for applications without RoHS3 compliance mandates

1210R-273J Selection Criteria:

Use when ROHS3 compliance is required
Higher inventory availability: 1916 pieces in stock
Identical electrical and mechanical performance to 1210-273J
Recommended for new designs targeting RoHS3-compliant end products

Both parts maintain equivalent performance across all electrical parameters, frequency response, temperature operating range, and mechanical form factor. Selection between these parts is determined by regulatory compliance requirements and supply availability rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can the 1210R-273J replace the 1210-273J in existing designs?

A: Yes. The 1210R-273J is electrically and mechanically equivalent to the 1210-273J. All inductance, current rating, DC resistance, Q factor, frequency response, and temperature specifications are identical. The primary difference is RoHS3 compliance status. Substitution is valid when compliance requirements permit.

Q: What is the difference between 1210-273J and 1210R-273J?

A: The 1210R-273J is ROHS3 compliant, while the 1210-273J is RoHS non-compliant. All other electrical and mechanical parameters are identical. The "R" designation in the part number indicates the RoHS3-compliant variant.

Q: Are these parts pin-compatible?

A: Both parts use surface mount technology in the 1210 (3225 Metric) package with identical physical dimensions (0.128" L x 0.095" W, 3.25mm x 2.42mm) and maximum seated height (0.101", 2.57mm). They are footprint-compatible on PCBs designed for either variant.

Q: What is the current rating limitation?

A: Both parts are rated for 193 mA maximum current. DC resistance is 5Ohm maximum. These specifications determine the thermal and electrical performance limits in circuit applications.

Q: Can these inductors be used in high-frequency applications?

A: Yes. Both parts have a self-resonant frequency of 18 MHz and a Q factor of 30 at 2.5 MHz, making them suitable for RF and high-frequency circuit applications within these frequency ranges.

Q: What is the operating temperature range?

A: Both parts operate across -55°C to 125°C. This range covers industrial and extended commercial temperature requirements.

Q: Is moisture sensitivity a concern?

A: Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited moisture tolerance. Standard handling and storage practices apply.

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