RC2012F304CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F304CS is a 300 kOhms ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture-resistant construction, operating across -55°C to 155°C temperature range. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit selection from qualified alternative manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Specification Basis
Resistance	300 kOhms	Core electrical specification
Tolerance	±1%	Precision requirement
Power Rating	0.125W (1/8W)	Thermal dissipation capacity
Package / Case	0805 (2012 Metric)	Physical footprint and mounting
Composition	Thick Film	Construction technology
Temperature Coefficient	±100ppm/°C	Stability over temperature range
Operating Temperature	-55°C ~ 155°C	Environmental operating limits
RoHS Status	ROHS3 Compliant	Environmental compliance
MSL Rating	1 (Unlimited)	Moisture sensitivity level
Number of Terminations	2	Connection points

Substitute Part Grouping Explanation

Substitution logic for the RC2012F304CS is based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria (Mandatory Match):

Resistance value: 300 kOhms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package: 0805 (2012 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance
MSL 1 rating

Grouping Classification:

Group 1 - Direct Equivalents (Identical Specifications): Parts meeting all primary substitution criteria with identical power rating (0.125W) and no additional features beyond moisture resistance.

Group 2 - Automotive-Qualified Equivalents (AEC-Q200): Parts meeting all primary substitution criteria with AEC-Q200 automotive qualification. These parts are electrically and mechanically equivalent with enhanced reliability screening for automotive applications.

Group 3 - Enhanced Performance Variants (Higher Power Rating): Parts with identical electrical specifications but higher power rating (0.5W instead of 0.125W). These are physically compatible but provide increased thermal dissipation capacity. Selection requires verification that higher power rating does not conflict with circuit design intent.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp (°C)	Features	Height Max (mm)	RoHS	MSL
RC2012F304CS	Samsung Electro-Mechanics	300k	±1%	0.125	0805	±100ppm/°C	-55~155	Moisture Resistant	0.65	ROHS3	1
CR0805-FX-3003ELF	Bourns Inc.	300k	±1%	0.125	0805	±100ppm/°C	-55~155	Moisture Resistant	0.60	ROHS3	1
ERJ-6ENF3003V	Panasonic Electronic Components	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200	0.70	ROHS3	1
KTR10EZPF3003	Rohm Semiconductor	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200, High Voltage	0.65	ROHS3	1
RC0805FR-07300KL	YAGEO	300k	±1%	0.125	0805	±100ppm/°C	-55~155	Moisture Resistant	0.60	ROHS3	1
RMCF0805FT300K	Stackpole Electronics Inc	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200	0.65	ROHS3	1
AC0805FR-07300KL	YAGEO	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200, Moisture Resistant	0.60	ROHS3	1
CRCW0805300KFKEA	Vishay Dale	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200	0.50	ROHS3	1
CRCW0805300KFKEAHP	Vishay Dale	300k	±1%	0.5	0805	±100ppm/°C	-55~155	AEC-Q200, Pulse Withstanding	0.50	ROHS3	1
RCS0805300KFKEA	Vishay Dale	300k	±1%	0.5	0805	±100ppm/°C	-55~155	AEC-Q200, Pulse Withstanding	0.50	ROHS3	1
RMCF0805FG300K	Stackpole Electronics Inc	300k	±1%	0.125	0805	±100ppm/°C	-55~155	AEC-Q200	0.65	ROHS3	1

Engineering Selection Recommendations

Group 1 - Direct Equivalents (Moisture Resistant, Non-Automotive):

CR0805-FX-3003ELF (Bourns Inc.) and RC0805FR-07300KL (YAGEO) are direct functional equivalents to RC2012F304CS. Both parts maintain identical electrical specifications, 0.125W power rating, and moisture-resistant construction. These selections are appropriate for non-automotive applications where AEC-Q200 qualification is not required. CR0805-FX-3003ELF offers higher inventory availability (39,387 pcs) compared to RC0805FR-07300KL (1,532 pcs).

Group 2 - Automotive-Qualified Equivalents (AEC-Q200, 0.125W):

ERJ-6ENF3003V (Panasonic), KTR10EZPF3003 (Rohm), RMCF0805FT300K (Stackpole), RMCF0805FG300K (Stackpole), and AC0805FR-07300KL (YAGEO) are electrically and mechanically equivalent with AEC-Q200 automotive qualification. These parts are suitable for automotive and high-reliability applications. RMCF0805FT300K provides the highest inventory (73,649 pcs). KTR10EZPF3003 includes high-voltage capability as an additional feature. AC0805FR-07300KL combines AEC-Q200 qualification with moisture-resistant construction.

Group 3 - Enhanced Power Rating Variants (0.5W):

CRCW0805300KFKEAHP (Vishay Dale) and RCS0805300KFKEA (Vishay Dale) provide 0.5W power rating with AEC-Q200 qualification and pulse-withstanding capability. These parts are physically compatible in 0805 package but deliver four times the power dissipation capacity. Selection of these variants requires confirmation that increased power rating aligns with circuit design specifications and does not introduce unintended thermal characteristics.

Compliance Verification:

All listed substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and identical operating temperature range (-55°C to 155°C). All parts are classified as Active product status.

Frequently Asked Questions (FAQ)

Q1: Can CR0805-FX-3003ELF replace RC2012F304CS in all applications?

CR0805-FX-3003ELF is a direct electrical and mechanical equivalent with identical 300 kOhms ±1% 0.125W specifications in 0805 package. The primary difference is manufacturer (Bourns vs. Samsung). Substitution is valid for applications where manufacturer-specific qualification is not required. Height difference (0.60mm vs. 0.65mm) is within standard PCB assembly tolerances.

Q2: What is the difference between moisture-resistant and AEC-Q200 qualified parts?

Moisture-resistant construction (CR0805-FX-3003ELF, RC0805FR-07300KL) provides protection against humidity exposure during storage and handling. AEC-Q200 qualification (ERJ-6ENF3003V, RMCF0805FT300K, AC0805FR-07300KL) indicates automotive-grade reliability screening including temperature cycling, humidity bias, and electrical stress testing. AEC-Q200 parts are suitable for both automotive and general industrial applications requiring higher reliability assurance.

Q3: Can CRCW0805300KFKEAHP (0.5W) be used instead of RC2012F304CS (0.125W)?

CRCW0805300KFKEAHP is physically compatible in 0805 package with identical electrical specifications (300 kOhms ±1%). The 0.5W power rating provides four times greater thermal dissipation capacity. Substitution is valid when circuit design permits higher power rating. Verify that increased power dissipation does not conflict with thermal management strategy or introduce unintended circuit behavior.

Q4: What packaging options are available for these substitutes?

RC2012F304CS is supplied in Tape & Reel (TR) packaging. Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. RC0805FR-07300KL and CRCW0805300KFKEAHP are supplied in Cut Tape format. Verify packaging compatibility with assembly equipment and procurement requirements before selection.

Q5: Are all substitute parts suitable for automotive applications?

Parts with AEC-Q200 designation (ERJ-6ENF3003V, KTR10EZPF3003, RMCF0805FT300K, RMCF0805FG300K, AC0805FR-07300KL, CRCW0805300KFKEA, CRCW0805300KFKEAHP, RCS0805300KFKEA) meet automotive reliability standards. CR0805-FX-3003ELF and RC0805FR-07300KL are non-automotive qualified. Selection depends on application classification and customer qualification requirements.

Q6: What is the significance of height differences among substitute parts?

Height variations range from 0.50mm to 0.70mm maximum seated height. These differences are within standard PCB assembly tolerances and do not affect electrical performance. Height specification is relevant only for applications with strict mechanical clearance constraints or automated assembly equipment with height-sensitive placement parameters.

Q7: Does KTR10EZPF3003 high-voltage feature affect substitution suitability?

KTR10EZPF3003 includes high-voltage capability as an additional feature beyond standard 0805 resistor specifications. This feature does not conflict with standard applications and provides enhanced performance margin for circuits operating at elevated voltages. Substitution is valid for all applications where standard 300 kOhms ±1% 0.125W specifications are required.

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