Bourns 4308R-102-221 Equivalent & Substitute Parts

Part Overview

The Bourns 4308R-102-221 is a 4-resistor isolated network array in 8-SIP package configuration, rated at 220 Ohm ±2% with 300mW power per element. This component is classified as Active product status and is designed for through-hole mounting applications requiring discrete resistor networks with matched characteristics and thermal stability across industrial temperature ranges.

Substitute parts are identified to address component availability, supply chain continuity, and compliance requirements while maintaining functional and electrical equivalence.

Substiute Parts

4308R-102-221

Bourns Inc.In Stock: 9064308R-102-221 Datasheet

Current PartRFQ

4308R-102-221LF

Bourns Inc.In Stock: 25314308R-102-221LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4308R-102-221 is determined by strict equivalence across the following critical parameters:

• Resistance value: 220 Ohm (exact match required)
• Tolerance: ±2% (exact match required)
• Circuit configuration: Isolated 4-resistor network (exact match required)
• Package: 8-SIP through-hole (exact match required)
• Power rating: 300mW per element (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)
• Pin count: 8 (exact match required)

The identified substitute part maintains all electrical and mechanical specifications identical to the main part number, with differentiation limited to RoHS compliance status and lead finish designation.

Parameter Comparison

Engineering Selection Recommendations

Both the 4308R-102-221 and 4308R-102-221LF are functionally equivalent for circuit applications requiring isolated 4-resistor networks with 220 Ohm resistance and 300mW power per element.

The primary differentiation is RoHS compliance status. The 4308R-102-221LF carries ROHS3 compliance certification, making it the appropriate selection for applications subject to RoHS3 regulatory requirements or design standards mandating lead-free component construction. The 4308R-102-221 is RoHS non-compliant and suitable for applications without such compliance constraints.

Both parts maintain identical electrical performance, thermal characteristics, and mechanical compatibility. Selection between these parts is determined by regulatory and compliance requirements applicable to the end application, not by functional or performance considerations.

Frequently Asked Questions (FAQ)

Q: Are the 4308R-102-221 and 4308R-102-221LF electrically interchangeable?

A: Yes. Both parts are electrically identical with matching resistance values (220 Ohm ±2%), power ratings (300mW per element), temperature coefficients (±100ppm/°C), and operating ranges (-55°C to 125°C). The "LF" designation indicates lead-free construction and RoHS3 compliance, not electrical differences.

Q: What does the "LF" suffix indicate?

A: The "LF" suffix denotes lead-free (RoHS3 compliant) construction. The 4308R-102-221LF uses lead-free solder and materials, while the 4308R-102-221 does not meet RoHS3 requirements.

Q: Can I use these parts interchangeably in PCB assembly?

A: Yes, both parts are mechanically and electrically compatible. They share identical 8-SIP package dimensions, pin configurations, and through-hole mounting requirements. PCB layouts designed for one part number will accommodate the other without modification.

Q: Which part should I specify for new designs?

A: Specify the 4308R-102-221LF for new designs unless legacy or non-RoHS applications explicitly require the 4308R-102-221. RoHS3 compliance is increasingly standard in modern electronics manufacturing.

Q: Are there any thermal or reliability differences between these parts?

A: No. Both parts maintain identical temperature coefficients (±100ppm/°C), resistor-ratio-drift specifications (50ppm/°C), and operating temperature ranges (-55°C to 125°C). Thermal and reliability performance are equivalent.

Q: What is the significance of the 50ppm/°C resistor-ratio-drift specification?

A: This parameter defines the maximum change in resistance matching between individual resistors within the array as temperature varies. Both parts maintain this specification, ensuring stable ratiometric performance across the operating temperature range.