RLP73N1JR30FTDF Equivalent & Substitute Parts

Part Overview

The RLP73N1JR30FTDF is a 300 mOhms ±1% thick film chip resistor manufactured by TE Connectivity Passive Product, rated at 0.125W (1/8W) in a 0603 (1608 Metric) surface mount package. This component is designed for current sensing applications and is classified as Active product status. The part is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed specifications for this product category, enabling direct replacement or upgrade scenarios in circuit designs.

Substiute Parts

RLP73N1JR30FTDF

TE Connectivity Passive ProductIn Stock: 1163RLP73N1JR30FTDF Datasheet

Current PartRFQ

CSR0603FKR300

Stackpole Electronics IncIn Stock: 39876CSR0603FKR300 Datasheet

DirectRFQ

RCWE0603R300FKEA

Vishay DaleIn Stock: 5614RCWE0603R300FKEA Datasheet

UpgradeRFQ

UCR03EVPFLR300

Rohm SemiconductorIn Stock: 12068UCR03EVPFLR300 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RLP73N1JR30FTDF are classified based on electrical and mechanical parameter equivalence:

Direct Equivalent Substitutes maintain identical specifications across all critical parameters: 300 mOhms resistance, ±1% tolerance, 0.125W power rating, 0603 package, thick film composition, current sense feature, ±300ppm/°C temperature coefficient, and -55°C ~ 155°C operating temperature range.

Upgrade Substitutes provide enhanced specifications while maintaining core electrical compatibility. These parts increase the power rating from 0.125W to 0.2W (1/5W), include automotive AEC-Q200 qualification, and feature improved temperature coefficients or moisture resistance. The 0603 package footprint remains identical, ensuring mechanical compatibility.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and 2-terminal configuration, confirming suitability for direct circuit board replacement.

Parameter Comparison

Engineering Selection Recommendations

CSR0603FKR300 (Stackpole Electronics Inc) serves as a direct equivalent substitute for the RLP73N1JR30FTDF. This part maintains identical electrical specifications including 300 mOhms resistance, ±1% tolerance, 0.125W power rating, and ±300ppm/°C temperature coefficient. Both components share the same 0603 package footprint and current sense thick film composition. RoHS3 compliance and MSL 1 rating confirm regulatory and environmental compatibility. This substitute is suitable for applications requiring direct replacement without design modification.

RCWE0603R300FKEA (Vishay Dale) and UCR03EVPFLR300 (Rohm Semiconductor) function as upgrade substitutes. Both parts increase the power rating to 0.2W (1/5W), providing enhanced thermal performance in current sensing circuits. Both include automotive AEC-Q200 qualification, indicating suitability for automotive and high-reliability applications. The RCWE0603R300FKEA features a reduced temperature coefficient of ±100ppm/°C compared to the original ±300ppm/°C, improving temperature stability. The UCR03EVPFLR300 provides a temperature coefficient range of 0/+150ppm/°C. All three substitute parts maintain 0603 package compatibility, RoHS3 compliance, and MSL 1 rating. These upgrades are applicable when designs require improved power dissipation capability or automotive-grade reliability certification.

Frequently Asked Questions (FAQ)

Q: Can CSR0603FKR300 replace RLP73N1JR30FTDF without circuit modification?

A: Yes. The CSR0603FKR300 maintains identical electrical and mechanical specifications: 300 mOhms ±1%, 0.125W power rating, 0603 package, ±300ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Direct substitution is supported.

Q: What is the primary difference between the direct equivalent and upgrade substitutes?

A: The CSR0603FKR300 provides direct equivalence with identical 0.125W power rating. The RCWE0603R300FKEA and UCR03EVPFLR300 upgrade substitutes increase power rating to 0.2W and include automotive AEC-Q200 qualification. All maintain 0603 package compatibility and current sense functionality.

Q: Are the upgrade substitutes (RCWE0603R300FKEA and UCR03EVPFLR300) physically compatible with the original RLP73N1JR30FTDF footprint?

A: Yes. All substitute parts use the 0603 (1608 Metric) package with identical 2-terminal configuration. Physical dimensions remain within compatible tolerances for standard PCB layouts. The upgrade substitutes feature slightly increased height (0.024" maximum vs. 0.022" maximum), which does not affect standard surface mount assembly processes.

Q: Which substitute part offers the best temperature stability?

A: The RCWE0603R300FKEA provides the lowest temperature coefficient at ±100ppm/°C, compared to ±300ppm/°C for the original RLP73N1JR30FTDF and CSR0603FKR300. The UCR03EVPFLR300 offers 0/+150ppm/°C. Selection depends on application temperature stability requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts—CSR0603FKR300, RCWE0603R300FKEA, and UCR03EVPFLR300—are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original RLP73N1JR30FTDF specifications.

Q: What applications benefit from the upgrade substitutes with AEC-Q200 qualification?

A: The RCWE0603R300FKEA and UCR03EVPFLR300 are qualified for automotive applications requiring AEC-Q200 certification. These parts are suitable for automotive current sensing circuits, power management modules, and high-reliability industrial applications where enhanced thermal performance and automotive-grade reliability are required.