CSR1206FT20L0 Equivalent & Substitute Parts

Part Overview

The CSR1206FT20L0 is a 20 mOhms ±1% 0.5W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This current sense resistor is designed for precision low-resistance applications requiring high accuracy and stable performance across industrial temperature ranges. The part is currently active in production with 5415 units in stock.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative compositions or power ratings that maintain electrical and mechanical compatibility.

Substiute Parts

CSR1206FT20L0

Stackpole Electronics IncIn Stock: 5484CSR1206FT20L0 Datasheet

Current PartRFQ

PF1206FRF070R02L

YAGEOIn Stock: 119318PF1206FRF070R02L Datasheet

DirectRFQ

UCR18EVHFSR020

Rohm SemiconductorIn Stock: 10068UCR18EVHFSR020 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR1206FT20L0 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Resistance value: 20 mOhms
• Tolerance: ±1%
• Package: 1206 (3216 Metric)
• Operating temperature range: -55°C to 155°C minimum
• RoHS3 compliance
• MSL rating: 1 or equivalent

Allowable Variations:

• Power rating: 0.5W or higher (derating may apply for lower ratings)
• Composition: Thick film or metal foil (both suitable for current sense applications)
• Temperature coefficient: ±100ppm/°C or tighter specifications
• Product status: Active or obsolete (if inventory available)
• Additional certifications: AEC-Q200 automotive qualification acceptable

The two identified substitutes meet these criteria with specific trade-offs noted in the parameter comparison.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: CSR1206FT20L0 (Stackpole Electronics Inc)

The main part remains the preferred choice due to active product status, matching power rating (0.5W), and standard thick film composition. Recommended for new designs and applications without automotive qualification requirements.

Secondary Selection: UCR18EVHFSR020 (Rohm Semiconductor)

This substitute is suitable for applications requiring automotive-grade components. The part maintains identical power rating (0.5W), package dimensions, and operating temperature range. The temperature coefficient specification (0/+200ppm/°C) is acceptable for current sense applications. Active product status ensures long-term availability. Recommended for automotive or mission-critical applications where AEC-Q200 qualification is specified.

Tertiary Selection: PF1206FRF070R02L (YAGEO)

This substitute is available in high inventory (119294 units) but carries obsolete product status, indicating discontinued manufacturing. The reduced power rating (0.25W versus 0.5W) requires thermal derating analysis for the specific application. Metal foil composition provides superior temperature stability compared to thick film. Use only when supply constraints on active parts are critical and thermal design permits lower power dissipation.

Frequently Asked Questions (FAQ)

Q: Can PF1206FRF070R02L replace CSR1206FT20L0 in all applications?

A: No. The reduced power rating (0.25W versus 0.5W) requires verification that the application's power dissipation does not exceed 0.25W. Thermal derating curves must be consulted. The obsolete status also presents long-term supply risk.

Q: Is UCR18EVHFSR020 suitable for non-automotive applications?

A: Yes. The AEC-Q200 automotive qualification is a superset of standard industrial requirements. The part meets all electrical and mechanical specifications for general industrial use. The slightly broader temperature coefficient range (0/+200ppm/°C) is acceptable for current sense applications.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use identical 1206 (3216 Metric) package with two terminations. PCB footprints are interchangeable.

Q: What is the impact of composition differences (thick film versus metal foil)?

A: Metal foil (PF1206FRF070R02L) provides superior temperature stability and lower noise characteristics. Thick film (CSR1206FT20L0 and UCR18EVHFSR020) offers standard performance for current sense applications. Selection depends on application noise and stability requirements.

Q: Can these parts be used interchangeably in production?

A: Interchangeability requires design validation. Electrical parameters (resistance, tolerance, temperature coefficient) are compatible. Thermal design must accommodate the lower power rating of PF1206FRF070R02L. Obsolete status of PF1206FRF070R02L may create supply chain risk.

Q: What certifications apply to each part?

A: All three parts are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity). UCR18EVHFSR020 carries additional AEC-Q200 automotive qualification. All parts are REACH unaffected and classified as EAR99 for export control purposes.