ERT-J1VT202J NTC Thermistor Equivalent & Substitute Parts

Part Overview

The ERT-J1VT202J is a surface mount NTC thermistor manufactured by Panasonic Electronic Components, rated at 2kΩ @ 25°C with a B25/50 value of 4500K. This component is classified as Active and RoHS3 compliant, designed for temperature sensing applications requiring stable thermal response characteristics in a compact 0603 (1608 Metric) package.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design flexibility permits selection from alternative manufacturers while maintaining equivalent electrical and mechanical performance within specified tolerance bands.

Key Parameters

Parameter	Value	Specification
Resistance @ 25°C	2kΩ	±5% tolerance
B Value (B25/50)	4500K	±2% tolerance
Operating Temperature Range	-40°C to 125°C	Full range
Power Dissipation	100 mW maximum	Thermal limit
Package / Case	0603 (1608 Metric)	Surface mount
RoHS Compliance	ROHS3 Compliant	Environmental standard
Moisture Sensitivity Level	MSL 1 (Unlimited)	Storage classification

Substitute Part Grouping Explanation

Substitution eligibility for NTC thermistors is determined by the following criteria:

Primary Matching Parameters:

Package / Case: 0603 (1608 Metric) surface mount configuration
Operating Temperature Range: -40°C to 125°C minimum
Power Dissipation: 100 mW or greater
RoHS3 Compliance: Required for environmental standards alignment
Moisture Sensitivity Level: MSL 1 or equivalent

Secondary Electrical Parameters:

Resistance @ 25°C: Tolerance band ±5%
B Value (B25/50): Tolerance band ±2% to ±3%
Thermal stability across temperature range

The substitute parts listed exhibit variations in nominal resistance values (470Ω, 1kΩ, 4.7kΩ, and 100kΩ) and B-value characteristics. These parts maintain identical package geometry, operating temperature envelope, power rating, and compliance certifications. Selection depends on circuit-specific resistance and thermal response requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance @ 25°C	B25/50 Value	B Value Tolerance	Operating Temp	Power Max	Package	Product Status	RoHS Status
ERT-J1VT202J	Panasonic	2kΩ	4500K	±2%	-40°C ~ 125°C	100 mW	0603	Active	ROHS3
NCP18XW472J03RB	Murata	4.7kΩ	3950K	±3%	-40°C ~ 125°C	100 mW	0603	Active	ROHS3
NCP18XQ471J03RB	Murata	470Ω	3650K	±2%	-40°C ~ 125°C	100 mW	0603	Active	ROHS3
NCP18XQ102J03RB	Murata	1kΩ	3650K	±2%	-40°C ~ 125°C	100 mW	0603	Active	ROHS3
NCP18WF104J03RB	Murata	100kΩ	4250K	±2%	-40°C ~ 125°C	100 mW	0603	Not For New Designs	ROHS3

Engineering Selection Recommendations

All substitute parts maintain identical mechanical compatibility (0603 package), thermal operating range (-40°C to 125°C), power dissipation capability (100 mW), and RoHS3 compliance status with the primary ERT-J1VT202J component.

NCP18XW472J03RB, NCP18XQ471J03RB, and NCP18XQ102J03RB are classified as Active products and represent current production options suitable for new designs. These parts are available in high inventory quantities and maintain full compliance certifications.

NCP18WF104J03RB carries a "Not For New Designs" status, indicating this part is in mature production phase. While electrically and mechanically compatible, this part should be reserved for legacy system maintenance or applications where design revision is not feasible.

Selection among active substitute parts depends on circuit requirements for specific resistance values and B-value thermal response characteristics. All listed alternatives provide equivalent reliability and environmental compliance to the primary part.

Frequently Asked Questions (FAQ)

Q: Can NCP18 series parts directly replace the ERT-J1VT202J in existing designs?

A: Yes, provided the circuit design accommodates the specific resistance and B-value characteristics of the selected substitute. All listed NCP18 parts share identical 0603 package geometry, operating temperature range, power rating, and compliance certifications. Verify that the substitute part's resistance value and thermal response curve align with circuit requirements.

Q: What is the significance of the "Not For New Designs" status on NCP18WF104J03RB?

A: This designation indicates the part is in mature production phase and may have extended lead times or eventual discontinuation. For new product development, select from parts marked as Active status: NCP18XW472J03RB, NCP18XQ471J03RB, or NCP18XQ102J03RB.

Q: Are there differences in B-value tolerance between substitute parts?

A: Yes. NCP18XW472J03RB specifies ±3% B-value tolerance, while NCP18XQ471J03RB, NCP18XQ102J03RB, and NCP18WF104J03RB specify ±2% tolerance. The primary ERT-J1VT202J also specifies ±2% tolerance. Select based on thermal accuracy requirements for your application.

Q: Do all substitute parts have identical moisture sensitivity levels?

A: Yes. All listed parts, including the primary ERT-J1VT202J, are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What packaging options are available for substitute parts?

A: NCP18XW472J03RB is supplied in Tape & Reel (TR). NCP18XQ471J03RB is available in Cut Tape (CT) & Digi-Reel®. NCP18XQ102J03RB is supplied in Tape & Reel (TR). NCP18WF104J03RB packaging information is not specified in available data. Confirm packaging compatibility with your assembly process requirements.

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