CAT16-49R9F4GLF Equivalent & Substitute Parts

Part Overview

The CAT16-49R9F4GLF is a 49.9 Ohm isolated 4-resistor network array manufactured by Bourns Inc. in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part delivers 62.5mW power per element with ±1% tolerance and ±200ppm/°C temperature coefficient across an operating range of -55°C to 125°C.

Key Parameters

Parameter	Value
Resistance	49.9 Ohm
Tolerance	±1%
Number of Resistors	4
Circuit Type	Isolated
Power Per Element	62.5mW
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C to 125°C
Package / Case	1206 (3216 Metric), Concave, Long Side Terminals
Number of Pins	8
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CAT16-49R9F4GLF is determined by strict equivalence across the following parameters:

Resistance value: 49.9 Ohm
Tolerance: ±1%
Number of resistors: 4
Circuit type: Isolated
Temperature coefficient: ±200ppm/°C
Operating temperature range: -55°C to 125°C
Package / Case: 1206 (3216 Metric), Concave, Long Side Terminals
Number of pins: 8
Mounting type: Surface Mount
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

Two substitute parts meet these criteria. Variations in power per element (62.5mW vs. 63mW) and maximum seated height (0.024" vs. 0.028") fall within acceptable manufacturing tolerances for this component category and do not affect functional substitution.

Parameter Comparison

Parameter	CAT16-49R9F4GLF (Main)	CAT16-49R9F4LF	742C08349R9FP
Manufacturer	Bourns Inc.	Bourns Inc.	CTS Resistor Products
Product Status	Obsolete	Active	Active
Resistance (Ohms)	49.9	49.9	49.9
Tolerance	±1%	±1%	±1%
Number of Resistors	4	4	4
Circuit Type	Isolated	Isolated	Isolated
Power Per Element	62.5mW	62.5mW	63mW
Temperature Coefficient	±200ppm/°C	±200ppm/°C	±200ppm/°C
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Package / Case	1206 (3216 Metric), Concave, Long Side Terminals	1206 (3216 Metric), Concave, Long Side Terminals	1206 (3216 Metric), Concave, Long Side Terminals
Number of Pins	8	8	8
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)
Height - Seated (Max)	0.024" (0.60mm)	0.024" (0.60mm)	0.028" (0.70mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

CAT16-49R9F4LF is the primary substitute for the obsolete CAT16-49R9F4GLF. Both parts are manufactured by Bourns Inc. and share identical electrical and mechanical specifications. The CAT16-49R9F4LF carries active product status and is available in higher inventory quantities (33,573 pieces), ensuring long-term supply continuity. This part is the direct replacement with no design modifications required.

742C08349R9FP manufactured by CTS Resistor Products is a secondary substitute option. It maintains all critical electrical parameters and package dimensions. The 1mW increase in power per element (63mW vs. 62.5mW) and 0.004" (0.10mm) increase in maximum seated height represent minor variations within standard manufacturing tolerances. This part carries active product status and is qualified for automotive AEC-Q200 applications. Selection of this part is appropriate when supply constraints on the Bourns variant exist or when automotive qualification is a design requirement.

Both substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can CAT16-49R9F4LF directly replace CAT16-49R9F4GLF without PCB modifications?

A: Yes. The CAT16-49R9F4LF is a direct replacement. All electrical parameters, package dimensions, pin count, and mounting characteristics are identical. No PCB layout changes are required.

Q: What is the difference between CAT16-49R9F4GLF and CAT16-49R9F4LF?

A: The primary difference is product status. CAT16-49R9F4GLF is obsolete, while CAT16-49R9F4LF is active. The suffix "LF" indicates lead-free compliance. Electrical and mechanical specifications are equivalent.

Q: Can 742C08349R9FP be used in place of CAT16-49R9F4GLF?

A: Yes, with consideration of minor physical differences. The 742C08349R9FP has a maximum seated height of 0.028" compared to 0.024" for the original part. This 0.004" difference must be evaluated against PCB clearance requirements. All electrical parameters are functionally equivalent.

Q: Are there packaging differences between the substitute parts?

A: CAT16-49R9F4LF is supplied in Tape & Reel (TR) packaging. The original CAT16-49R9F4GLF packaging format is not specified in the data. Both substitute parts are surface mount compatible with identical footprints.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both CAT16-49R9F4LF and 742C08349R9FP are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

Q: Is the 742C08349R9FP suitable for automotive applications?

A: Yes. The 742C08349R9FP is qualified for automotive AEC-Q200 applications, DDR SDRAM, DRAM, and MDDR use cases. If automotive qualification is a design requirement, this part is appropriate for selection.

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