CSR1206FK33L0 Equivalent & Substitute Parts

Part Overview

The CSR1206FK33L0 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 measurement applications requiring low resistance values with tight tolerance specifications. The part is active in production and widely used in power management and current monitoring circuits. Substitute parts may be required due to inventory constraints, supply chain disruptions, or specific application requirements such as automotive qualification or enhanced moisture resistance.

Key Parameters

Parameter	Value
Resistance	33 mOhms (0.033 Ohm)
Tolerance	±1%
Power Rating	0.5W (1/2W)
Package	1206 (3216 Metric)
Composition	Thick Film
Operating Temperature Range	-55°C to +155°C
Moisture Sensitivity Level	MSL 1 (Unlimited)
RoHS Status	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution eligibility for the CSR1206FK33L0 is determined by strict equivalence across 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
RoHS3 compliance
MSL rating: 1 or better

All substitute parts listed below meet these core electrical and mechanical requirements. Variations in temperature coefficient, dimensional tolerances, and additional certifications (such as automotive qualification) are secondary parameters that do not prevent substitution but may influence selection based on application-specific needs.

Parameter Comparison

Parameter	CSR1206FK33L0 (Stackpole)	RCWE120633L0FNEA (Vishay Dale)	RLP73M2BR033FTDF (TE Connectivity)
Manufacturer	Stackpole Electronics Inc	Vishay Dale	TE Connectivity Passive Product
Resistance	33 mOhms	33 mOhms	33 mOhms
Tolerance	±1%	±1%	±1%
Power Rating	0.5W	0.5W	0.5W
Package	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Composition	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100 ppm/°C	±200 ppm/°C	±400 ppm/°C
Operating Temperature	-55°C to +155°C	-55°C to +155°C	-55°C to +155°C
Length	0.120" (3.05 mm)	0.122" (3.10 mm)	0.122" (3.10 mm)
Width	0.061" (1.55 mm)	0.063" (1.60 mm)	0.061" (1.55 mm)
Height (Seated Max)	0.026" (0.65 mm)	0.028" (0.70 mm)	0.026" (0.65 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Qualification	Not specified	AEC-Q200	Not specified
Additional Features	Current Sense	Current Sense, Moisture Resistant, AEC-Q200	Current Sense

Engineering Selection Recommendations

All three parts are active products with ROHS3 compliance and MSL 1 rating, confirming their suitability for general industrial and commercial applications.

RCWE120633L0FNEA (Vishay Dale) is recommended for applications requiring automotive-grade reliability. This part carries AEC-Q200 qualification and includes moisture-resistant construction, making it suitable for automotive and harsh environment deployments. The slightly higher temperature coefficient (±200 ppm/°C) remains within acceptable limits for most current sensing applications.

RLP73M2BR033FTDF (TE Connectivity) provides direct dimensional compatibility with the original CSR1206FK33L0, with identical height and width specifications. This part is suitable for space-constrained PCB layouts. The higher temperature coefficient (±400 ppm/°C) should be evaluated against application precision requirements.

CSR1206FK33L0 (Stackpole Electronics Inc) offers the lowest temperature coefficient (±100 ppm/°C), providing superior stability for precision current measurement applications where temperature drift must be minimized.

Frequently Asked Questions (FAQ)

Q: Can RCWE120633L0FNEA replace CSR1206FK33L0 in non-automotive applications?

A: Yes. The RCWE120633L0FNEA meets all core electrical and mechanical requirements for the CSR1206FK33L0. The AEC-Q200 automotive qualification is an additional certification that does not restrict use in non-automotive circuits. The moisture-resistant feature provides added reliability in humid environments.

Q: What is the impact of different temperature coefficients on substitution?

A: Temperature coefficient determines resistance change over the operating temperature range. CSR1206FK33L0 (±100 ppm/°C) exhibits the smallest resistance variation, while RLP73M2BR033FTDF (±400 ppm/°C) exhibits the largest. For precision current sensing applications operating across wide temperature ranges, the lower temperature coefficient is preferable. However, all three parts remain within ±1% tolerance specification across the -55°C to +155°C range.

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

A: Minor dimensional variations exist. RCWE120633L0FNEA is slightly larger (0.122" × 0.063" × 0.028" max) compared to CSR1206FK33L0 (0.120" × 0.061" × 0.026" max). RLP73M2BR033FTDF matches CSR1206FK33L0 dimensions exactly. These variations are within standard 1206 package tolerances and should not cause PCB layout issues in typical applications. Verify clearance in space-constrained designs.

Q: Do all substitute parts support the same packaging format?

A: Yes. All three parts are supplied in Tape & Reel (TR) format, maintaining supply chain compatibility with the original CSR1206FK33L0.

Q: Which substitute part should be selected for maximum inventory availability?

A: RCWE120633L0FNEA (Vishay Dale) has the highest reported inventory at 16,496 pieces. RLP73M2BR033FTDF (TE Connectivity) has 1,520 pieces available. CSR1206FK33L0 (Stackpole) has 1,095 pieces in stock.

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