RN104PJ750CS Equivalent & Substitute Parts

Part Overview

The RN104PJ750CS is a 4-resistor isolated network array manufactured by Samsung Electro-Mechanics, featuring 75 Ohm resistors with ±5% tolerance and 62.5mW power per element. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part is designed for surface mount applications in 0804 package configuration with long side terminals.

Key Parameters

Parameter	Value
Resistance	75 Ohms
Tolerance	±5%
Number of Resistors	4
Circuit Type	Isolated
Power Per Element	62.5mW
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C to 155°C
Number of Pins	8
Package Type	0804 Surface Mount
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RN104PJ750CS is determined by the following critical parameters:

Electrical Parameters:

Resistance value: 75 Ohms
Tolerance: ±5%
Number of resistor elements: 4
Circuit configuration: Isolated
Power dissipation per element: 62.5mW
Temperature coefficient: ±200ppm/°C
Operating temperature range: -55°C to 155°C

Mechanical Parameters:

Package designation: 0804
Pin count: 8
Mounting technology: Surface Mount
Physical dimensions: 0.079" L x 0.039" W (2.00mm x 1.00mm)

Compliance Parameters:

RoHS3 compliance
Moisture Sensitivity Level 1

The YC124-JR-0775RL from YAGEO meets all electrical and compliance requirements. Physical differences exist in terminal configuration (convex vs. concave) and maximum seated height (0.022" vs. 0.020"), which remain within acceptable mechanical tolerances for standard PCB assembly processes.

Parameter Comparison

Parameter	RN104PJ750CS (Samsung)	YC124-JR-0775RL (YAGEO)
Manufacturer	Samsung Electro-Mechanics	YAGEO
Resistance (Ohms)	75	75
Tolerance	±5%	±5%
Number of Resistors	4	4
Circuit Type	Isolated	Isolated
Power Per Element (mW)	62.5	62.5
Temperature Coefficient (ppm/°C)	±200	±200
Operating Temperature Range	-55°C to 155°C	-55°C to 155°C
Number of Pins	8	8
Package / Case	0804, Concave, Long Side Terminals	0804, Convex, Long Side Terminals
Size / Dimension	0.079" L x 0.039" W (2.00mm x 1.00mm)	0.079" L x 0.039" W (2.00mm x 1.00mm)
Height - Seated (Max)	0.020" (0.50mm)	0.022" (0.55mm)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The YC124-JR-0775RL is the qualified substitute for the RN104PJ750CS based on the following factors:

Electrical Equivalence: All critical electrical parameters match exactly, including resistance value, tolerance, power rating, temperature coefficient, and operating temperature range. The isolated circuit configuration is identical.

Compliance Status: Both components maintain ROHS3 compliance and MSL Level 1 rating. The substitute part carries AEC-Q200 automotive qualification, providing additional quality assurance beyond the original part's specification.

Mechanical Compatibility: While terminal geometry differs (convex vs. concave), both configurations are standard long-side terminal designs for 0804 packages. The 0.002" (0.05mm) height difference falls within typical PCB assembly tolerances and does not impact reflow soldering or component placement.

Availability: The substitute part is in active production status with substantial inventory availability (11,861 pieces), compared to the obsolete status of the original part.

Frequently Asked Questions (FAQ)

Q: Can YC124-JR-0775RL be used as a direct replacement for RN104PJ750CS?

A: Yes. Both components share identical electrical specifications: 75 Ohm resistance, ±5% tolerance, 4-element isolated configuration, 62.5mW power per element, ±200ppm/°C temperature coefficient, and -55°C to 155°C operating range. Physical dimensions and pin counts are equivalent.

Q: What is the difference between concave and convex terminal configurations?

A: Terminal geometry refers to the shape of the long-side contact points. Concave terminals feature inward-curving contact surfaces, while convex terminals feature outward-curving surfaces. Both configurations are compatible with standard 0804 package footprints and reflow soldering processes.

Q: Does the 0.002" height difference affect PCB assembly?

A: No. The 0.002" (0.05mm) difference in maximum seated height is negligible for surface mount assembly. Standard PCB design tolerances and reflow profiles accommodate this variation without impact to component placement, solder joint quality, or board clearance.

Q: Why is the original part obsolete?

A: Product obsolescence is determined by the manufacturer and typically reflects end-of-life decisions based on market demand and production economics. The YC124-JR-0775RL provides functional continuity for designs requiring 75 Ohm 4-resistor isolated networks.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant with MSL Level 1 rating. The substitute part includes AEC-Q200 automotive qualification, which represents an additional quality standard beyond the original specification.

Q: What packaging formats are available for the substitute part?

A: The YC124-JR-0775RL is supplied in Tape & Reel (TR) format, standard for high-volume surface mount applications.

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