RLP73N1JR20FTDF Equivalent & Substitute Parts

Part Overview

The RLP73N1JR20FTDF is a 200 mOhms ±1% 1/8W chip resistor in 0603 (1608 Metric) package manufactured by TE Connectivity Passive Product. This thick film current sense resistor operates across -55°C to 155°C and is classified as Active product status. Substitute parts are necessary to address inventory availability, compliance requirements, or performance specifications that may exceed the original design parameters while maintaining electrical and mechanical compatibility.

Substiute Parts

RLP73N1JR20FTDF

TE Connectivity Passive ProductIn Stock: 1451RLP73N1JR20FTDF Datasheet

Current PartRFQ

CSR0603FKR200

Stackpole Electronics IncIn Stock: 9867CSR0603FKR200 Datasheet

DirectRFQ

RCWE0603R200FKEA

Vishay DaleIn Stock: 5297RCWE0603R200FKEA Datasheet

UpgradeRFQ

UCR03EVPFLR200

Rohm SemiconductorIn Stock: 161919UCR03EVPFLR200 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Core Compatibility Requirements:

• Resistance value: 200 mOhms
• Tolerance: ±1%
• Package / Case: 0603 (1608 Metric)
• Composition: Thick Film
• Features: Current Sense
• Operating Temperature Range: -55°C ~ 155°C
• Number of Terminations: 2
• Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts listed meet these core requirements. Substitute parts are grouped into two categories based on power rating:

Direct Equivalent: CSR0603FKR200 maintains identical electrical specifications including 0.125W power rating.

Upgrade Substitutes: RCWE0603R200FKEA and UCR03EVPFLR200 provide higher power ratings (0.2W and 0.25W respectively) while maintaining all core electrical parameters. These upgrades are suitable for applications requiring enhanced thermal performance or design margin.

Parameter Comparison

Engineering Selection Recommendations

CSR0603FKR200 (Direct Equivalent): This Stackpole Electronics part provides identical electrical and mechanical specifications to the RLP73N1JR20FTDF. The CSR0603FKR200 achieves ROHS3 compliance, addressing regulatory requirements where the original part does not. Selection of this direct equivalent is appropriate for applications where the original design parameters are sufficient and regulatory compliance is required.

RCWE0603R200FKEA (Upgrade Substitute): This Vishay Dale part increases power rating to 0.2W while maintaining all core electrical parameters. The RCWE0603R200FKEA includes Automotive AEC-Q200 qualification and moisture-resistant features. Temperature coefficient improves to ±100ppm/°C. This upgrade is suitable for applications requiring automotive-grade reliability or enhanced thermal margin. ROHS3 compliance is achieved.

UCR03EVPFLR200 (Upgrade Substitute): This Rohm Semiconductor part provides the highest power rating at 0.25W with Automotive AEC-Q200 qualification. The UCR03EVPFLR200 offers improved temperature coefficient performance at 0/+150ppm/°C. This upgrade is appropriate for applications requiring maximum thermal headroom or automotive-grade specifications. ROHS3 compliance is achieved.

All substitute parts maintain the 0603 (1608 Metric) package footprint and are compatible with existing PCB layouts. Minor dimensional variations in width and height exist among upgrade substitutes but remain within standard 0603 package tolerances.

Frequently Asked Questions (FAQ)

Q: Can CSR0603FKR200 be used as a direct replacement for RLP73N1JR20FTDF?

A: Yes. The CSR0603FKR200 maintains identical resistance (200 mOhms), tolerance (±1%), power rating (0.125W), package (0603), and operating temperature range (-55°C ~ 155°C). Both parts are thick film current sense resistors with 2 terminations and MSL 1 rating. The primary difference is ROHS3 compliance achieved by the CSR0603FKR200.

Q: What are the advantages of using RCWE0603R200FKEA or UCR03EVPFLR200 over the direct equivalent?

A: Both upgrade substitutes provide higher power ratings (0.2W and 0.25W respectively) compared to the original 0.125W specification. This allows for greater thermal dissipation capability in the same package footprint. Additionally, both upgrades include Automotive AEC-Q200 qualification, which is not present in the original part. The RCWE0603R200FKEA includes moisture-resistant features, and both upgrades achieve improved or comparable temperature coefficients.

Q: Are there PCB layout compatibility concerns when substituting with upgrade parts?

A: Upgrade substitutes exhibit minor dimensional variations. The RCWE0603R200FKEA and UCR03EVPFLR200 have slightly increased width (0.033" and 0.034" respectively versus 0.031" for the original) and height (0.024" versus 0.022"). These variations remain within standard 0603 package tolerances and do not require PCB redesign. Existing 0603 footprints accommodate all listed substitutes.

Q: Which substitute part should be selected for automotive applications?

A: Both RCWE0603R200FKEA and UCR03EVPFLR200 carry Automotive AEC-Q200 qualification. The UCR03EVPFLR200 provides the highest power rating (0.25W) and is suitable for demanding automotive thermal environments. The RCWE0603R200FKEA offers a balanced approach with 0.2W power rating and moisture-resistant features.

Q: What is the impact of temperature coefficient differences among substitute parts?

A: The original RLP73N1JR20FTDF specifies ±300ppm/°C temperature coefficient. The CSR0603FKR200 maintains this specification. The RCWE0603R200FKEA improves to ±100ppm/°C, and the UCR03EVPFLR200 specifies 0/+150ppm/°C. Lower temperature coefficients provide better resistance stability across the operating temperature range (-55°C ~ 155°C), which is beneficial for precision current sensing applications.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging, matching the original RLP73N1JR20FTDF packaging format.

Q: What regulatory compliance differences exist among the parts?

A: The original RLP73N1JR20FTDF is RoHS non-compliant. All three substitute parts (CSR0603FKR200, RCWE0603R200FKEA, and UCR03EVPFLR200) achieve ROHS3 compliance. All parts maintain REACH Unaffected status and identical ECCN (EAR99) and HTSUS (8533.21.0030) classifications.