Equivalent & Substitute Parts: 1622821-1

Part Overview

The TE Connectivity 1622821-1 is a 1 Ohm ±5% 0.25W thick film chip resistor in 0805 (2012 Metric) package configuration, designed for current sense applications. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

1622821-1

TE Connectivity Passive ProductIn Stock: 9061622821-1 Datasheet

Current PartRFQ

CSR0805FK1R00

Stackpole Electronics IncIn Stock: 16381CSR0805FK1R00 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1622821-1 is based on the following critical parameters that must remain constant or improve:

Mandatory Matching Parameters:

• Resistance value: 1 Ohms
• Package / Case: 0805 (2012 Metric)
• Power rating: 0.25W (1/4W)
• Composition: Thick Film
• Application: Current Sense
• Number of Terminations: 2
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Improvements:

• Tolerance: ±5% (original) to ±1% (substitute) represents improved accuracy
• Temperature Coefficient: ±350ppm/°C (original) to ±200ppm/°C (substitute) represents improved stability
• Operating Temperature Range: -55°C ~ 125°C (original) to -55°C ~ 155°C (substitute) represents extended upper temperature capability
• Product Status: Obsolete (original) to Active (substitute) ensures ongoing availability

The Stackpole Electronics CSR0805FK1R00 meets all mandatory parameters while providing superior electrical characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The Stackpole Electronics CSR0805FK1R00 is the direct functional equivalent for the obsolete TE Connectivity 1622821-1. Selection of this substitute is based on the following engineering criteria:

Product Status and Supply Chain: The original part is classified as obsolete, creating supply chain risk. The CSR0805FK1R00 maintains active product status with documented inventory availability, ensuring long-term sourcing capability.

Electrical Compatibility: Both components share identical resistance value (1 Ohms), power rating (0.25W), and package configuration (0805 / 2012 Metric). The substitute provides improved tolerance (±1% versus ±5%) and superior temperature coefficient stability (±200ppm/°C versus ±350ppm/°C), making it suitable for applications requiring higher precision.

Regulatory and Compliance Alignment: Both parts maintain identical REACH status (REACH Unaffected), ECCN classification (EAR99), and Moisture Sensitivity Level (MSL 1). The substitute carries RoHS3 compliance certification, meeting current environmental standards.

Thermal Performance: The substitute extends the upper operating temperature limit from 125°C to 155°C, providing enhanced thermal margin for high-temperature applications while maintaining the lower temperature limit of -55°C.

Physical Compatibility: The substitute height of 0.026" (0.65mm) versus the original 0.020" (0.50mm) remains within standard 0805 package tolerances and does not impact PCB assembly or clearance requirements.

Frequently Asked Questions (FAQ)

Q: Can the CSR0805FK1R00 be used as a direct replacement for the 1622821-1 in existing designs?

A: Yes. The CSR0805FK1R00 is electrically and mechanically compatible with the 1622821-1. Both components share identical resistance value, power rating, package configuration, and current sense application designation. The substitute provides improved tolerance and temperature coefficient characteristics.

Q: What is the significance of the tolerance improvement from ±5% to ±1%?

A: Tolerance defines the acceptable deviation from the nominal resistance value. The ±1% tolerance of the CSR0805FK1R00 provides tighter resistance accuracy compared to the ±5% tolerance of the original part. This improvement is beneficial for precision current sensing applications where measurement accuracy is critical.

Q: Does the height difference between the two parts affect PCB assembly?

A: No. The substitute height of 0.026" (0.65mm) versus the original 0.020" (0.50mm) remains within the standard dimensional envelope for 0805 (2012 Metric) package components. This difference does not impact PCB layout, component placement, or clearance requirements.

Q: Why is the operating temperature range extended in the substitute part?

A: The CSR0805FK1R00 extends the upper operating temperature limit to 155°C compared to the original 125°C. This extended range provides additional thermal margin for applications operating in elevated temperature environments while maintaining the same lower temperature limit of -55°C.

Q: Are there any compliance or regulatory differences between the two parts?

A: No. Both components maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99). The substitute carries RoHS3 compliance certification, which aligns with current environmental and regulatory requirements.

Q: What does the temperature coefficient value indicate?

A: Temperature coefficient (ppm/°C) measures the resistance change per degree Celsius of temperature variation. The substitute temperature coefficient of ±200ppm/°C is superior to the original ±350ppm/°C, indicating better resistance stability across temperature variations. This is advantageous for applications requiring consistent performance across wide temperature ranges.

Q: Is the CSR0805FK1R00 available in the same packaging format?

A: The substitute is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production and automated assembly. The original part was supplied in bulk packaging. Both formats contain the same component in 0805 (2012 Metric) package configuration.

Q: Can the substitute be used in new designs, or is it only for replacement applications?

A: The CSR0805FK1R00 is an active product suitable for both new design implementations and replacement of obsolete components. Its active product status ensures ongoing availability and support for current and future production requirements.