CSR1206FT33L0 Equivalent & Substitute Parts

Part Overview

The CSR1206FT33L0 is a 33 milliohm, ±1% tolerance, 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 thermal stability. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when the main part experiences supply constraints, extended lead times, or when design requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

CSR1206FT33L0

Stackpole Electronics IncIn Stock: 955CSR1206FT33L0 Datasheet

Current PartRFQ

UCR18EVHFSR033

Rohm SemiconductorIn Stock: 9440UCR18EVHFSR033 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR1206FT33L0 is determined by the following critical parameters:

• Resistance value: 33 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W minimum
• Package: 1206 (3216 Metric) form factor
• Composition: Thick film construction
• Operating temperature range: -55°C to 155°C minimum
• RoHS compliance: ROHS3 or equivalent

The UCR18EVHFSR033 from Rohm Semiconductor meets all substitution criteria. Both parts share identical electrical specifications, package dimensions, and compliance certifications. The substitute part includes automotive-grade AEC-Q200 qualification, which represents an enhancement to the base specification without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the CSR1206FT33L0 and UCR18EVHFSR033 are active production parts with full ROHS3 compliance and identical core electrical specifications. Selection between these parts should be based on:

• Supply availability and lead time requirements
• Application environment (automotive applications benefit from AEC-Q200 qualification of the Rohm part)
• Temperature coefficient requirements (the Stackpole part specifies ±100 ppm/°C; the Rohm part specifies 0 to +200 ppm/°C, which is acceptable for most current sense applications within the stated operating range)
• Inventory positioning and procurement strategy

Both parts are suitable for direct substitution in current sense applications requiring 33 milliohm precision resistors in 1206 package format.

Frequently Asked Questions (FAQ)

Q: Can UCR18EVHFSR033 replace CSR1206FT33L0 in production designs?

A: Yes. Both parts meet identical electrical specifications (33 mOhms ±1%, 0.5W), operate across the same temperature range (-55°C to 155°C), use identical 1206 package geometry, and carry ROHS3 compliance. The Rohm part includes AEC-Q200 automotive qualification, which does not restrict its use in non-automotive applications.

Q: Are there physical dimension differences between these parts?

A: Dimensions are functionally equivalent. CSR1206FT33L0 measures 0.120" L × 0.061" W (3.05mm × 1.55mm); UCR18EVHFSR033 measures 0.126" L × 0.063" W (3.20mm × 1.60mm). Both have maximum seated height of 0.026" (0.65mm). These minor variations fall within standard 1206 package tolerance and do not affect PCB layout or assembly compatibility.

Q: What is the difference in temperature coefficient specifications?

A: CSR1206FT33L0 specifies ±100 ppm/°C; UCR18EVHFSR033 specifies 0 to +200 ppm/°C. Both specifications ensure stable resistance performance across the -55°C to 155°C operating range. The Rohm specification is broader but remains acceptable for current sense applications where the primary requirement is maintaining ±1% tolerance across temperature extremes.

Q: Are both parts suitable for current sense applications?

A: Yes. Both parts are designated as current sense thick film resistors and carry identical feature classifications. They are designed for precision low-resistance measurement in power management and monitoring circuits.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8533.21.0030. Both carry MSL 1 (unlimited moisture sensitivity level), indicating no special moisture protection requirements during storage or handling.