KTR25JZPJ680 Equivalent & Substitute Parts

Part Overview

The KTR25JZPJ680 is a 68 Ohm ±5% 1/3W thick film chip resistor in 1210 (3225 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 qualification and operates across -55°C to 155°C. The part is currently active in production with 803 units in stock.

Equivalent and substitute parts are identified when design requirements allow tolerance relaxation, power rating increases, or when sourcing from alternative manufacturers becomes necessary due to inventory constraints or supply chain considerations.

Key Parameters

Parameter	Value
Resistance	68 Ohms
Tolerance	±5%
Power Rating	0.333W (1/3W)
Package	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 relationships for the KTR25JZPJ680 are established based on the following criteria:

Upgrade Substitutes — Parts with improved tolerance (±1% vs ±5%) while maintaining identical resistance, package, and operating temperature range. These allow tighter circuit performance specifications.

Power Rating Upgrades — Parts with increased power dissipation capability (0.5W vs 0.333W) in the same 1210 package. These provide design margin for thermal stress conditions while maintaining mechanical and electrical compatibility.

Manufacturer Alternatives — Parts from different manufacturers (Panasonic, Stackpole) with identical or superior electrical specifications and AEC-Q200 compliance, enabling supply chain flexibility.

Key Parameters for Substitution:

Resistance value: 68 Ohms (fixed)
Package: 1210 (3225 Metric) (fixed)
Operating temperature: -55°C to 155°C (fixed)
Automotive compliance: AEC-Q200 (required)
Tolerance: ±5% or better
Power rating: 0.333W minimum

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coeff	Package	Status	Inventory
KTR25JZPJ680	Rohm Semiconductor	68 Ω	±5%	0.333W	±200ppm/°C	1210	Active	803 Pcs
KTR25JZPF68R0	Rohm Semiconductor	68 Ω	±1%	0.333W	±100ppm/°C	1210	Active	1816 Pcs
ERJ-14NF68R0U	Panasonic Electronic Components	68 Ω	±1%	0.5W	±100ppm/°C	1210	Not For New Designs	10930 Pcs
ERJ-14YJ680U	Panasonic Electronic Components	68 Ω	±5%	0.5W	±200ppm/°C	1210	Not For New Designs	14290 Pcs
RMCF1210JT68R0	Stackpole Electronics Inc	68 Ω	±5%	0.5W	±200ppm/°C	1210	Active	6363 Pcs

Engineering Selection Recommendations

Direct Equivalent (Same Specifications): KTR25JZPF68R0 from Rohm Semiconductor provides identical electrical performance with improved tolerance (±1%) and lower temperature coefficient (±100ppm/°C). This part is active in production with higher inventory availability (1816 units).

Upgrade Path (Enhanced Performance): ERJ-14NF68R0U and RMCF1210JT68R0 both offer increased power rating (0.5W) in the same 1210 package. RMCF1210JT68R0 maintains active product status and provides thermal design margin. ERJ-14NF68R0U is marked "Not For New Designs" and should be avoided for new development.

Supply Chain Alternative: RMCF1210JT68R0 from Stackpole Electronics Inc is an active product with identical tolerance and temperature coefficient to the original part, offering an alternative source while maintaining all electrical and mechanical specifications.

Avoid for New Designs: ERJ-14NF68R0U and ERJ-14YJ680U carry "Not For New Designs" status and should only be considered for legacy system maintenance or repair applications.

Frequently Asked Questions (FAQ)

Q: Can KTR25JZPF68R0 replace KTR25JZPJ680 directly? A: Yes. Both parts are 68 Ohm resistors in 1210 package with identical power rating (0.333W) and operating temperature range (-55°C to 155°C). KTR25JZPF68R0 offers tighter tolerance (±1% vs ±5%) and lower temperature coefficient, making it a direct upgrade.

Q: What is the difference between 0.333W and 0.5W power ratings? A: Power rating indicates maximum continuous power dissipation. A 0.5W part can safely dissipate more heat than a 0.333W part in the same package size. Substituting a 0.5W part for a 0.333W requirement provides thermal margin but does not change electrical behavior at normal operating conditions.

Q: Are Panasonic ERJ-14 series parts compatible? A: ERJ-14NF68R0U and ERJ-14YJ680U are mechanically and electrically compatible in the 1210 package. However, both carry "Not For New Designs" status. Use only for legacy applications or when no other options are available.

Q: Why is RMCF1210JT68R0 recommended over Panasonic alternatives? A: RMCF1210JT68R0 maintains active product status, ensuring long-term availability and supply chain stability. Panasonic ERJ-14 series parts are discontinued for new designs, creating future obsolescence risk.

Q: Does tolerance affect circuit functionality? A: Tolerance determines the acceptable resistance range. ±5% tolerance allows ±3.4 Ohm variation (64.6Ω to 71.4Ω), while ±1% allows ±0.68 Ohm variation (67.32Ω to 68.68Ω). Select tolerance based on circuit precision requirements.

Q: Are all listed parts AEC-Q200 qualified? A: Yes. All substitute parts listed carry AEC-Q200 automotive qualification, meeting reliability and quality standards for automotive applications.

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