KTR25JZPJ331 Equivalent & Substitute Parts

Part Overview

The KTR25JZPJ331 is a 330 Ohm ±5% thick film chip resistor manufactured by Rohm Semiconductor, rated for 1/3W (0.333W) power dissipation in a 1210 (3225 Metric) surface mount package. This component is AEC-Q200 automotive qualified and designed for high voltage applications across an operating temperature range of -55°C to 155°C. The part is currently active in production with 708 units in stock.

Substitute parts are necessary when design requirements demand improved tolerance specifications, higher power ratings, or when primary part availability is constrained. The following alternatives maintain the same resistance value and package footprint while offering variations in tolerance, power rating, and manufacturer options.

Key Parameters

Parameter	Value
Resistance	330 Ohms
Tolerance	±5%
Power Rating	0.333W (1/3W)
Package / Case	1210 (3225 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the KTR25JZPJ331 is determined by the following criteria:

Mandatory Parameters (Must Match):

Resistance value: 330 Ohms
Package / Case: 1210 (3225 Metric)
Composition: Thick Film
Operating temperature range: -55°C to 155°C minimum
Automotive qualification: AEC-Q200
RoHS compliance: ROHS3 Compliant

Allowable Variations:

Tolerance: Can be improved from ±5% to ±1% for enhanced precision
Power rating: Can be increased from 0.333W to 0.5W or 0.667W for additional thermal margin
Temperature coefficient: Can be improved from ±200ppm/°C to ±100ppm/°C
Manufacturer: Alternative qualified suppliers acceptable
Product status: Active preferred; Not For New Designs acceptable for legacy applications

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coeff	Height (Max)	Product Status	Inventory
KTR25JZPJ331	Rohm Semiconductor	330 Ohms	±5%	0.333W	±200ppm/°C	0.65mm	Active	708 Pcs
KTR25JZPF3300	Rohm Semiconductor	330 Ohms	±1%	0.333W	±100ppm/°C	0.65mm	Active	3617 Pcs
ERJ-14YJ331U	Panasonic Electronic Components	330 Ohms	±5%	0.5W	±200ppm/°C	0.70mm	Not For New Designs	33876 Pcs
RMCF1210FT330R	Stackpole Electronics Inc	330 Ohms	±1%	0.5W	±100ppm/°C	0.70mm	Active	10596 Pcs
RMCP1210FT330R	Stackpole Electronics Inc	330 Ohms	±1%	0.667W	±100ppm/°C	0.70mm	Active	10369 Pcs

Engineering Selection Recommendations

KTR25JZPF3300 (Rohm Semiconductor): Select this upgrade when improved tolerance specification (±1%) is required while maintaining identical power rating and package height. Same manufacturer ensures consistent supply chain qualification. Active product status supports long-term availability.

RMCF1210FT330R (Stackpole Electronics Inc): Select this substitute when increased power dissipation margin (0.5W vs 0.333W) is needed with improved tolerance (±1%). Stackpole qualification provides alternative sourcing. Active product status ensures continued production.

RMCP1210FT330R (Stackpole Electronics Inc): Select this substitute when maximum thermal headroom is required (0.667W power rating) combined with ±1% tolerance and ±100ppm/°C temperature coefficient. Highest power rating among alternatives. Active product status supports new designs.

ERJ-14YJ331U (Panasonic Electronic Components): Select this substitute only for legacy applications or when high inventory availability is critical. Product status is Not For New Designs; use only for maintenance or replacement of existing assemblies. Maintains ±5% tolerance matching the original part.

Frequently Asked Questions (FAQ)

Q: Can KTR25JZPF3300 be used as a direct replacement for KTR25JZPJ331?

A: Yes. Both parts share identical resistance (330 Ohms), package (1210), power rating (0.333W), and operating temperature range (-55°C to 155°C). KTR25JZPF3300 offers improved tolerance (±1% vs ±5%) and lower temperature coefficient (±100ppm/°C vs ±200ppm/°C), making it a superior upgrade with no design modifications required.

Q: What is the difference between RMCF1210FT330R and RMCP1210FT330R?

A: Both are Stackpole products with ±1% tolerance and ±100ppm/°C temperature coefficient. The primary difference is power rating: RMCF1210FT330R is rated 0.5W (1/2W) while RMCP1210FT330R is rated 0.667W (2/3W). Select RMCP1210FT330R for applications requiring higher thermal dissipation capability.

Q: Will substituting with a higher power-rated resistor affect circuit performance?

A: No. Higher power ratings do not alter electrical performance. The resistance value, tolerance, and temperature coefficient remain the primary performance determinants. Higher power ratings provide additional thermal margin and do not negatively impact circuit operation.

Q: Is ERJ-14YJ331U suitable for new product designs?

A: No. ERJ-14YJ331U carries a Not For New Designs product status. This part is appropriate only for maintenance, repair, or replacement of existing assemblies. For new designs, select from active products: KTR25JZPF3300, RMCF1210FT330R, or RMCP1210FT330R.

Q: Do all substitute parts maintain AEC-Q200 automotive qualification?

A: Yes. All listed substitute parts are AEC-Q200 qualified and ROHS3 compliant, matching the original KTR25JZPJ331 specifications. All parts operate across the -55°C to 155°C temperature range required for automotive applications.

Q: What is the impact of package height variation (0.65mm vs 0.70mm)?

A: Package height differences of 0.05mm are within standard PCB assembly tolerances and do not affect electrical performance or mechanical fit in standard 1210 footprints. Verify clearance in your specific application if height-constrained space exists.

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