KTR25JZPJ821 Equivalent & Substitute Parts

Part Overview

The KTR25JZPJ821 is a 820 Ohms ±5% 1/3W thick film chip resistor in 1210 (3225 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with high voltage capability and operates across -55°C to 155°C temperature range. The part is currently in active production status. Substitute parts become necessary when the original part experiences supply constraints, extended lead times, or when design requirements allow for compatible alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

KTR25JZPJ821

Rohm SemiconductorIn Stock: 797KTR25JZPJ821 Datasheet

Current PartRFQ

RMCF1210JT820R

Stackpole Electronics IncIn Stock: 1308RMCF1210JT820R Datasheet

DirectRFQ

ERJ-14YJ821U

Panasonic Electronic ComponentsIn Stock: 15583ERJ-14YJ821U Datasheet

UpgradeRFQ

CRCW1210820RJNEA

Vishay DaleIn Stock: 6081CRCW1210820RJNEA Datasheet

SimilarRFQ

ERJ-P14J821U

Panasonic Electronic ComponentsIn Stock: 987ERJ-P14J821U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the KTR25JZPJ821 is determined by the following critical parameters: resistance value (820 Ohms), tolerance (±5%), package type (1210), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C to 155°C), and automotive AEC-Q200 compliance. All substitute parts listed maintain these core electrical and mechanical specifications. The primary distinction among substitutes is power rating, where the KTR25JZPJ821 operates at 0.333W (1/3W), while most alternatives provide 0.5W (1/2W) capability. A higher power rating is electrically compatible in applications designed for the original 1/3W specification, as it provides additional thermal margin without altering electrical performance at the specified resistance and tolerance values.

Parameter Comparison

Engineering Selection Recommendations

For new designs and active production, RMCF1210JT820R (Stackpole), CRCW1210820RJNEA (Vishay Dale), and ERJ-P14J821U (Panasonic) are preferred substitutes. All three maintain active product status, full AEC-Q200 automotive compliance, and ROHS3 certification. RMCF1210JT820R and CRCW1210820RJNEA offer standard thick film construction, while ERJ-P14J821U provides additional pulse withstanding capability. ERJ-14YJ821U (Panasonic) is marked as "Not For New Designs" and should be avoided in new applications despite meeting all electrical specifications.

The primary consideration when selecting among active alternatives is packaging format: Tape & Reel (TR) for automated assembly processes, or Cut Tape (CT) for manual or lower-volume applications. All substitutes provide 0.5W power rating, which exceeds the original 0.333W specification and is electrically compatible for applications designed around the KTR25JZPJ821.

Frequently Asked Questions (FAQ)

Q: Can I use a 0.5W (1/2W) resistor as a substitute for the 0.333W (1/3W) KTR25JZPJ821?

A: Yes. A higher power rating is electrically compatible and provides additional thermal margin. The resistor will operate safely in circuits designed for the original 1/3W specification. Power dissipation is determined by circuit conditions, not the component's rated capacity.

Q: Are all substitute parts automotive-qualified?

A: Yes. All listed substitutes carry AEC-Q200 automotive qualification, matching the original part's compliance level.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is optimized for high-speed automated assembly equipment. Cut Tape (CT) packaging is supplied in smaller quantities on tape without the reel and is suitable for manual assembly or lower-volume production runs.

Q: Why is ERJ-14YJ821U marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development for this part number. While it meets all electrical and mechanical specifications, it should not be selected for new product designs due to potential future availability constraints.

Q: Do all substitutes have the same physical dimensions?

A: All substitutes use the 1210 (3225 Metric) package with identical length (0.126" / 3.20mm) and width (0.098" / 2.50mm). Height varies slightly between manufacturers (0.024" to 0.028"), which is within standard PCB assembly tolerances and does not affect functionality.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance.