Request Quote
(Ships tomorrow)
73F273AF-RC Equivalent & Substitute Parts
Part Overview
The 73F273AF-RC is a 2.7 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 125 mA maximum current with 14.6Ohm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 105°C and meets ROHS3 compliance requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 2.7 mH |
| Inductance Tolerance | ±5% |
| Current Rating | 125 mA |
| DC Resistance (DCR) | 14.6Ohm Max |
| Core Material | Ferrite |
| Shielding | Unshielded |
| Mounting Type | Through Hole |
| Package Type | Axial |
| Operating Temperature Range | -55°C to 105°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the 73F273AF-RC are qualified based on the following critical parameters:
- Inductance value: 2.7 mH (exact match required)
- Inductance tolerance: ±5% or tighter
- Core material: Ferrite
- Shielding configuration: Unshielded
- Mounting type: Through Hole, Axial package
- Current rating: Equal to or greater than 125 mA
- DC resistance: Lower or equal to 14.6Ohm
- Operating temperature range: Must encompass or exceed -55°C to 105°C
- Regulatory compliance: ROHS3 Compliant
The substitute parts listed below meet these electrical and mechanical compatibility criteria, allowing direct replacement in applications where the 73F273AF-RC is specified.
Parameter Comparison
| Parameter | 73F273AF-RC (Bourns) | 2474R-42J (API Delevan) | AIAP-02-272K (Abracon) |
|---|---|---|---|
| Inductance | 2.7 mH | 2.7 mH | 2.7 mH |
| Inductance Tolerance | ±5% | ±5% | ±10% |
| Current Rating (Amps) | 125 mA | 250 mA | 240 mA |
| DC Resistance (DCR) | 14.6Ohm Max | 5.8Ohm Max | 5.4Ohm Max |
| Core Material | Ferrite | Ferrite | Not Specified |
| Shielding | Unshielded | Unshielded | Unshielded |
| Type | Drum Core, Wirewound | Molded | Wirewound |
| Operating Temperature Range | -55°C to 105°C | -55°C to 125°C | -40°C to 85°C |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package / Case | Axial | Axial | Axial |
| Product Status | Obsolete | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Both substitute parts are active products with ROHS3 compliance, providing long-term availability and regulatory support compared to the obsolete 73F273AF-RC.
The 2474R-42J (API Delevan) offers superior current handling capacity at 250 mA with significantly reduced DC resistance of 5.8Ohm, along with an extended upper operating temperature limit of 125°C. This part is supplied in Tape & Reel packaging.
The AIAP-02-272K (Abracon) provides 240 mA current rating with 5.4Ohm DC resistance and maintains wirewound construction similar to the original part. This part is supplied in Bulk packaging and operates to 85°C maximum.
Selection between these substitutes depends on application requirements for current capacity, thermal environment, and packaging format. Both parts maintain the required 2.7 mH inductance value and unshielded axial configuration.
Frequently Asked Questions (FAQ)
Q: Can the 2474R-42J or AIAP-02-272K be used as direct replacements for the 73F273AF-RC?
A: Both parts meet the core electrical specifications: 2.7 mH inductance, ferrite core, unshielded configuration, and through-hole axial mounting. Both exceed the 125 mA current requirement and provide lower DC resistance. Direct substitution is electrically compatible within the specified parameter ranges.
Q: What is the impact of different DC resistance values?
A: The substitute parts feature significantly lower DC resistance (5.8Ohm and 5.4Ohm respectively) compared to the original 14.6Ohm specification. This reduces resistive losses and heat generation in the inductor, which is beneficial for circuit performance. Applications sensitive to specific impedance characteristics should evaluate this difference.
Q: How do the operating temperature ranges differ?
A: The 73F273AF-RC operates from -55°C to 105°C. The 2474R-42J extends the upper limit to 125°C, suitable for higher-temperature environments. The AIAP-02-272K operates from -40°C to 85°C, which is narrower at both ends. Select based on your application's thermal requirements.
Q: What is the difference between the inductance tolerances?
A: The 73F273AF-RC and 2474R-42J both specify ±5% tolerance, while the AIAP-02-272K specifies ±10%. For applications requiring tighter inductance accuracy, the ±5% parts are preferred.
Q: Are there packaging differences to consider?
A: The 2474R-42J is supplied in Tape & Reel format, suitable for automated assembly. The AIAP-02-272K is supplied in Bulk format. The 73F273AF-RC packaging format is not specified in available data. Confirm packaging compatibility with your procurement and assembly processes.
Q: Do all substitute parts meet the same compliance standards?
A: All three parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in most markets.
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