TE Connectivity 1-1622821-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-1622821-4 is a 33 milliohm ±5% thick film chip resistor rated at 0.25W (1/4W) in 0805 (2012 Metric) package configuration. This component is designed for current sensing applications with a temperature coefficient of ±350ppm/°C and operates across -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility while meeting current design and supply chain requirements.

Substiute Parts

1-1622821-4

TE Connectivity Passive ProductIn Stock: 7661-1622821-4 Datasheet

Current PartRFQ

CSR0805FK33L0

Stackpole Electronics IncIn Stock: 916CSR0805FK33L0 Datasheet

UpgradeRFQ

UCR10EVHFSR033

Rohm SemiconductorIn Stock: 11720UCR10EVHFSR033 Datasheet

UpgradeRFQ

UCR10EVHJSR033

Rohm SemiconductorIn Stock: 1210UCR10EVHJSR033 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1-1622821-4 is determined by the following critical parameters that must remain constant or improve:

Core Electrical Parameters:

• Resistance value: 33 mOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required for PCB compatibility)
• Composition: Thick Film (exact match required for current sensing application)
• Features: Current Sense capability (required for application function)

Allowable Variations:

• Tolerance: Can improve from ±5% to ±1% (tighter tolerance is acceptable)
• Power Rating: Can increase from 0.25W to 0.333W or higher (higher rating is acceptable)
• Operating Temperature Range: Can extend beyond -55°C ~ 125°C (wider range is acceptable)
• Temperature Coefficient: Can improve (lower absolute value is acceptable)
• Product Status: Must transition from Obsolete to Active (required for supply continuity)

All substitute parts maintain identical physical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm), two terminations, and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Tolerance-Matched): The Rohm UCR10EVHJSR033 provides direct functional replacement with identical ±5% tolerance specification. This part maintains the original tolerance band while offering active product status, extended operating temperature range (-55°C ~ 155°C), and improved temperature coefficient performance (0/+250ppm/°C versus ±350ppm/°C). The 0.333W power rating provides additional thermal margin. AEC-Q200 automotive qualification is included, suitable for applications requiring automotive-grade reliability.

Upgraded Replacement (Improved Tolerance): The Stackpole CSR0805FK33L0 and Rohm UCR10EVHFSR033 both provide ±1% tolerance, representing a tighter tolerance specification than the original ±5%. The Stackpole part maintains 0.25W power rating equivalence, while the Rohm part increases to 0.333W. Both extend operating temperature to -55°C ~ 155°C and improve temperature coefficient performance. The Rohm UCR10EVHFSR033 includes AEC-Q200 automotive qualification and 0/+250ppm/°C temperature coefficient.

Compliance Considerations: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The Rohm parts carry AEC-Q200 automotive qualification, appropriate for applications requiring automotive-grade component reliability. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the Stackpole CSR0805FK33L0 replace the TE Connectivity 1-1622821-4 in all applications?

A: The Stackpole CSR0805FK33L0 is electrically compatible as a direct substitute. It maintains the 33 mOhm resistance, 0805 package, and thick film current sense composition. The improved ±1% tolerance and extended operating temperature range (-55°C ~ 155°C) are compatible with applications designed for the original part. Physical dimensions are identical. Verify application requirements do not specifically mandate ±5% tolerance or the original 0.25W power rating before selection.

Q: What is the difference between the two Rohm substitute parts?

A: Both Rohm parts (UCR10EVHJSR033 and UCR10EVHFSR033) are 0805 package, 33 mOhm, thick film current sense resistors with AEC-Q200 qualification. The primary difference is tolerance: UCR10EVHJSR033 maintains ±5% tolerance matching the original part, while UCR10EVHFSR033 provides ±1% tolerance. Both offer 0.333W power rating and identical temperature performance (0/+250ppm/°C, -55°C ~ 155°C operating range).

Q: Are there package compatibility concerns when substituting these parts?

A: No package compatibility concerns exist. All substitute parts use the 0805 (2012 Metric) package with identical physical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and two terminations. PCB footprints designed for the original TE Connectivity part accommodate all listed substitutes without modification.

Q: Does the increased power rating of the Rohm parts affect circuit performance?

A: The increased power rating (0.333W versus 0.25W) does not negatively affect circuit performance. Higher power rating indicates greater thermal capacity and does not change electrical characteristics. The 33 mOhm resistance value, tolerance, and temperature coefficient remain the specification-determining factors for circuit operation.

Q: Which substitute part is recommended for automotive applications?

A: Both Rohm parts (UCR10EVHJSR033 and UCR10EVHFSR033) carry AEC-Q200 automotive qualification. Select UCR10EVHJSR033 for tolerance matching the original ±5% specification, or UCR10EVHFSR033 for improved ±1% tolerance. Both provide identical automotive-grade reliability and extended operating temperature range.

Q: What is the significance of the improved temperature coefficient in substitute parts?

A: The substitute parts offer improved temperature coefficient specifications (±200ppm/°C for Stackpole, 0/+250ppm/°C for Rohm) compared to the original ±350ppm/°C. Lower temperature coefficient values indicate reduced resistance variation across the operating temperature range, providing improved circuit stability and measurement accuracy in current sensing applications across temperature extremes.