CMF551K5000FKBF39 Equivalent & Substitute Parts

Part Overview

The CMF551K5000FKBF39 is a 1.5 kOhms ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration. Manufactured by Vishay Dale under the CMF series, this component features flame retardant coating and moisture-resistant construction suitable for industrial and commercial applications. The part maintains Active product status with 663 units in current inventory.

Substitute parts are identified to address packaging availability, compliance requirements, and performance specifications. Alternative selections provide equivalent electrical performance while offering different packaging formats, improved regulatory compliance, or enhanced temperature stability characteristics.

Key Parameters

Parameter	Value
Resistance	1.5 kOhms
Tolerance	±1%
Power Rating	0.5W (1/2W)
Composition	Metal Film
Package Type	Axial
Operating Temperature Range	-55°C ~ 175°C
Temperature Coefficient	±100ppm/°C (±50ppm/°C for upgraded variants)
Features	Flame Retardant Coating, Moisture Resistant, Safety

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Resistance value: 1.5 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.5W / 1/2W (exact match required)
Composition: Metal Film (exact match required)
Package: Axial through-hole (exact match required)

Secondary Compatibility Parameters:

Operating temperature range: -55°C minimum and 175°C maximum (substitute must meet or exceed)
Temperature coefficient: ±100ppm/°C or better (lower values acceptable)
Physical dimensions: 0.090" Dia x 0.240" L nominal (minor variations within 0.093" Dia x 0.250" L acceptable for axial package)

Packaging Format Variations: Substitutes are grouped by packaging format (Bulk vs. Cut Tape) and regulatory compliance status (RoHS3 Compliant vs. RoHS non-compliant). These variations do not affect electrical performance but impact procurement, handling, and regulatory requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Packaging	RoHS Status	Inventory (Pcs)
CMF551K5000FKBF39	Vishay Dale	1.5 kOhms	±1%	0.5	±100	-55 ~ 175	Bulk	RoHS non-compliant	663
CMF551K5000FKEB	Vishay Dale	1.5 kOhms	±1%	0.5	±100	-55 ~ 175	Cut Tape (CT)	ROHS3 Compliant	5865
CMF551K5000FHEB	Vishay Dale	1.5 kOhms	±1%	0.5	±50	-55 ~ 175	Cut Tape (CT)	ROHS3 Compliant	13811
CMF551K5000FHEK	Vishay Dale	1.5 kOhms	±1%	0.5	±50	-55 ~ 175	Bulk	ROHS3 Compliant	1253
CMF551K5000FKBF	Vishay Dale	1.5 kOhms	±1%	0.5	±100	-55 ~ 175	Bulk	RoHS non-compliant	1877
RNMF12FTD1K50	Stackpole Electronics Inc	1.5 kOhms	±1%	0.5	±100	-55 ~ 155	Cut Tape (CT)	ROHS3 Compliant	5660

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: CMF551K5000FKEB, CMF551K5000FHEB, CMF551K5000FHEK, and RNMF12FTD1K50 all meet ROHS3 Compliant status. Selection among these depends on packaging format and temperature coefficient requirements.

For Enhanced Temperature Stability: CMF551K5000FHEB and CMF551K5000FHEK offer ±50ppm/°C temperature coefficient, providing superior stability compared to the ±100ppm/°C specification of the main part. Both maintain identical electrical parameters and operating temperature range.

For Packaging Format: Cut Tape (CT) packaging is available through CMF551K5000FKEB, CMF551K5000FHEB, and RNMF12FTD1K50. Bulk packaging options include CMF551K5000FHEK and CMF551K5000FKBF.

For Cross-Manufacturer Substitution: RNMF12FTD1K50 (Stackpole Electronics Inc) provides an alternative source with identical electrical specifications. Operating temperature maximum is 155°C versus 175°C for Vishay Dale variants. Physical dimensions are 0.093" Dia x 0.250" L, within acceptable axial package tolerance.

For Inventory Availability: CMF551K5000FHEB maintains the highest inventory level at 13,811 units, followed by CMF551K5000FKEB at 5,865 units.

Frequently Asked Questions (FAQ)

Q: Can CMF551K5000FKEB replace CMF551K5000FKBF39 directly?

A: Yes. Both parts share identical electrical specifications: 1.5 kOhms ±1%, 0.5W power rating, ±100ppm/°C temperature coefficient, and -55°C to 175°C operating range. The primary difference is packaging format (Cut Tape vs. Bulk) and RoHS compliance status (ROHS3 Compliant vs. RoHS non-compliant).

Q: What is the advantage of CMF551K5000FHEB over the main part?

A: CMF551K5000FHEB provides two improvements: ROHS3 Compliance and superior temperature coefficient (±50ppm/°C vs. ±100ppm/°C). All other electrical and mechanical parameters remain equivalent.

Q: Is RNMF12FTD1K50 a suitable substitute?

A: RNMF12FTD1K50 meets all primary electrical requirements with identical resistance, tolerance, and power rating. The operating temperature maximum is 155°C instead of 175°C. Physical dimensions are 0.093" Dia x 0.250" L, within acceptable axial package variation. This part is suitable for applications not requiring the full 175°C upper temperature limit.

Q: Does packaging format affect electrical performance?

A: No. Bulk and Cut Tape (CT) packaging formats contain identical components. Packaging selection is determined by procurement requirements, handling procedures, and assembly automation compatibility.

Q: Can I use CMF551K5000FKBF as a substitute?

A: Yes. CMF551K5000FKBF is electrically and mechanically identical to CMF551K5000FKBF39, differing only in the final suffix designation. Both are RoHS non-compliant with ±100ppm/°C temperature coefficient.

Q: Which substitute offers the best compliance profile?

A: All ROHS3 Compliant variants (CMF551K5000FKEB, CMF551K5000FHEB, CMF551K5000FHEK, and RNMF12FTD1K50) meet current regulatory requirements. CMF551K5000FHEB and CMF551K5000FHEK additionally provide improved temperature stability at ±50ppm/°C.

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