CAT16-121J2LF Equivalent & Substitute Parts

Part Overview

The CAT16-121J2LF is a 120 Ohm isolated 2-resistor network array manufactured by Bourns Inc. in 0606 surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part delivers 62.5mW power per element with ±5% tolerance and ±200ppm/°C temperature coefficient across an operating range of -55°C to 125°C.

Key Parameters

Parameter	Value
Resistance	120 Ohm
Tolerance	±5%
Number of Resistors	2
Circuit Type	Isolated
Power Per Element	62.5mW
Temperature Coefficient	±200ppm/°C
Number of Pins	4
Package / Case	0606, Concave
Operating Temperature Range	-55°C to 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CAT16-121J2LF is determined by strict equivalence across the following critical parameters:

Resistance value: 120 Ohm
Tolerance: ±5%
Circuit configuration: Isolated 2-resistor network
Power rating per element: 62.5mW
Temperature coefficient: ±200ppm/°C
Package type: 0606, Concave
Pin count: 4
Operating temperature range: -55°C to 125°C
Surface mount compatibility

The EXB-V4V121JV from Panasonic Electronic Components meets all specified electrical and mechanical parameters, qualifying as a direct equivalent substitute.

Parameter Comparison

Parameter	CAT16-121J2LF (Bourns)	EXB-V4V121JV (Panasonic)
Resistance	120 Ohm	120 Ohm
Tolerance	±5%	±5%
Number of Resistors	2	2
Circuit Type	Isolated	Isolated
Power Per Element	62.5mW	62.5mW
Temperature Coefficient	±200ppm/°C	±200ppm/°C
Number of Pins	4	4
Package / Case	0606, Concave	0606, Concave
Size / Dimension	0.063" L x 0.063" W (1.60mm x 1.60mm)	0.063" L x 0.063" W (1.60mm x 1.60mm)
Height - Seated (Max)	0.030" (0.75mm)	0.028" (0.70mm)
Operating Temperature	-55°C to 125°C	-55°C to 125°C
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 EXB-V4V121JV qualifies as a direct substitute for the obsolete CAT16-121J2LF based on complete electrical and mechanical parameter equivalence. Both components are ROHS3 compliant and carry identical moisture sensitivity ratings. The substitute part maintains active product status with Panasonic Electronic Components, ensuring long-term availability and supply chain continuity. The seated height differential of 0.002" (0.05mm) between the two parts remains within typical PCB assembly tolerances and does not impact functional performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can the EXB-V4V121JV be used as a direct replacement for CAT16-121J2LF in existing designs?

A: Yes. Both parts share identical electrical specifications (120 Ohm, ±5% tolerance, 62.5mW per element, ±200ppm/°C temperature coefficient) and mechanical compatibility (0606 package, 4-pin isolated configuration, surface mount). The maximum seated height difference of 0.002" is within standard PCB assembly tolerances.

Q: What is the primary reason for substitution?

A: The CAT16-121J2LF is classified as obsolete. The EXB-V4V121JV provides equivalent functionality with active product status and established supply availability.

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

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Does package type affect substitution eligibility?

A: No. Both parts use identical 0606 concave surface mount packages with matching footprints and pin configurations.

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

A: The EXB-V4V121JV is supplied in Tape & Reel (TR) format.

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