PWR221-2FCR030F Equivalent & Substitute Parts

Part Overview

The PWR221-2FCR030F is a 30 mOhms ±1% 50W through-hole resistor manufactured by Bourns Inc. in TO-221 package configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part combines thick film composition with pulse withstanding capability, designed for applications requiring precision current sensing and power dissipation in compact form factors.

Substiute Parts

PWR221-2FCR030F

Bourns Inc.In Stock: 1174PWR221-2FCR030F Datasheet

Current PartRFQ

PF2205-0R03J1

RiedonIn Stock: 990PF2205-0R03J1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PWR221-2FCR030F is determined by the following critical parameters:

• Resistance value: 30 mOhms (exact match required)
• Power rating: 50W (exact match required)
• Package compatibility: TO-221 or TO-220-2 (mechanically and electrically compatible)
• Pulse withstanding capability: Required feature
• Operating temperature range: Must encompass or exceed -40°C to 155°C
• RoHS3 compliance: Required for regulatory alignment

The PF2205-0R03J1 from Riedon meets these core substitution criteria. While tolerance differs (±5% versus ±1%), resistance value, power rating, package compatibility, and pulse withstanding capability align with the original specification. Both parts maintain ROHS3 compliance and support the required operating temperature envelope.

Parameter Comparison

Engineering Selection Recommendations

The PF2205-0R03J1 serves as a direct functional substitute for the obsolete PWR221-2FCR030F. Both components deliver identical 30 mOhms resistance at 50W power dissipation with pulse withstanding capability. The substitute part maintains active product status, ensuring long-term availability and supply chain stability.

Key considerations for selection:

• Tolerance specification: The PF2205-0R03J1 tolerance of ±5% is broader than the original ±1%. Applications requiring tighter tolerance control must evaluate circuit-level impact.
• Temperature coefficient: The substitute exhibits superior temperature stability (±250 ppm/°C versus ±600 ppm/°C), providing performance advantage across the operating range.
• Operating temperature: The substitute supports extended lower temperature operation (-55°C versus -40°C), expanding application scope.
• Package form factor: TO-220-2 and TO-221 packages are mechanically compatible with standard PCB footprints designed for either configuration.
• Regulatory compliance: Both parts maintain ROHS3 compliance, satisfying environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the PF2205-0R03J1 directly replace the PWR221-2FCR030F in existing designs?

A: Yes. Both components share identical resistance (30 mOhms) and power rating (50W) with compatible package footprints (TO-220-2 and TO-221). Mechanical and electrical compatibility is established. Circuit designers must evaluate tolerance impact (±5% versus ±1%) based on application requirements.

Q: What is the significance of the tolerance difference between these parts?

A: The PWR221-2FCR030F specifies ±1% tolerance, while the PF2205-0R03J1 specifies ±5%. In precision current sensing applications, this difference may affect measurement accuracy. Applications with relaxed tolerance requirements experience no functional impact.

Q: Are the TO-221 and TO-220-2 packages interchangeable?

A: TO-221 and TO-220-2 packages are mechanically and electrically compatible for two-terminal through-hole resistor applications. Standard PCB footprints accommodate both package configurations without modification.

Q: Why does the substitute part have a lower temperature coefficient?

A: The PF2205-0R03J1 employs thin film composition, which inherently provides superior temperature stability (±250 ppm/°C) compared to the thick film construction of the original part (±600 ppm/°C). This represents a performance improvement across the operating temperature range.

Q: Is the extended operating temperature range of the substitute part significant?

A: The PF2205-0R03J1 supports operation from -55°C to 155°C, compared to the original -40°C to 155°C specification. This extended lower temperature capability provides additional design flexibility for applications operating in cold environments.

Q: Do both parts maintain equivalent regulatory compliance?

A: Yes. Both the PWR221-2FCR030F and PF2205-0R03J1 are ROHS3 compliant, satisfying current environmental and regulatory requirements for electronic component manufacturing and use.