CAY17-331JALF Equivalent & Substitute Parts

Part Overview

The CAY17-331JALF is a 330 Ohm bussed 8-resistor network array manufactured by Bourns Inc. in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part delivers 62.5mW power per element with ±5% tolerance and ±250ppm/°C temperature coefficient across an operating range of -55°C to 155°C.

Key Parameters

Parameter	Value
Resistance	330 Ohm
Tolerance	±5%
Number of Resistors	8
Circuit Type	Bussed
Power Per Element	62.5mW
Temperature Coefficient	±250ppm/°C
Operating Temperature Range	-55°C to 155°C
Package / Case	1206 (3216 Metric), Convex, Long Side Terminals
Number of Pins	10
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CAY17-331JALF is determined by the following critical parameters:

Resistance value: 330 Ohm (exact match required)
Tolerance: ±5% (exact match required)
Circuit type: Bussed (exact match required)
Number of resistors: 8 (exact match required)
Package / Case: 1206 (3216 Metric), Convex, Long Side Terminals (exact match required)
Number of pins: 10 (exact match required)
Mounting type: Surface Mount (exact match required)
RoHS compliance: ROHS3 Compliant (required for regulatory continuity)

The two substitute parts identified—746X101331JP (CTS Resistor Products) and RAVF328RJT330R (Stackpole Electronics Inc)—meet all mandatory electrical and mechanical parameters. Both are active products with current manufacturing status, providing reliable procurement alternatives to the obsolete CAY17-331JALF.

Parameter Comparison

Parameter	CAY17-331JALF (Bourns)	746X101331JP (CTS)	RAVF328RJT330R (Stackpole)
Resistance (Ohms)	330	330	330
Tolerance	±5%	±5%	±5%
Number of Resistors	8	8	8
Circuit Type	Bussed	Bussed	Bussed
Power Per Element (mW)	62.5	31	62.5
Temperature Coefficient (ppm/°C)	±250	±200	±200
Operating Temperature Range	-55°C to 155°C	-55°C to 125°C	-55°C to 125°C
Package / Case	1206 (3216 Metric), Convex, Long Side Terminals	1206 (3216 Metric), Convex, Long Side Terminals	1206 (3216 Metric), Convex, Long Side Terminals
Number of Pins	10	10	10
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)	0.028" (0.70mm)	0.026" (0.65mm)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, providing immediate procurement advantages over the obsolete CAY17-331JALF. All three parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

The 746X101331JP (CTS Resistor Products) operates at reduced power per element (31mW versus 62.5mW) and a lower maximum operating temperature (125°C versus 155°C). This part is suitable for applications where thermal dissipation is not a limiting factor and operating temperatures remain below 125°C.

The RAVF328RJT330R (Stackpole Electronics Inc) maintains the original 62.5mW power per element specification and is functionally equivalent to the CAY17-331JALF across all critical electrical parameters. The maximum operating temperature is 125°C, which represents a 30°C reduction from the original part. This part is appropriate for designs operating within the -55°C to 125°C range.

Selection between the two substitutes depends on application thermal requirements and maximum operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can the 746X101331JP be used as a direct replacement for the CAY17-331JALF?

A: The 746X101331JP meets all mandatory electrical and mechanical parameters. However, it operates at half the power per element (31mW versus 62.5mW) and has a maximum operating temperature of 125°C versus 155°C. It is suitable for applications within these thermal constraints.

Q: What are the key differences between the two substitute parts?

A: The primary difference is power per element: 746X101331JP delivers 31mW while RAVF328RJT330R delivers 62.5mW. Both have identical maximum operating temperatures of 125°C. The RAVF328RJT330R maintains closer electrical equivalence to the original CAY17-331JALF.

Q: Are there any package or footprint compatibility concerns?

A: All three parts use identical 1206 (3216 Metric) packages with 10 pins. Physical dimensions are 0.126" L x 0.063" W. Seated heights vary slightly (0.024" to 0.028"), which is within typical PCB assembly tolerances and does not affect footprint compatibility.

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

A: Yes. Both 746X101331JP and RAVF328RJT330R are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original CAY17-331JALF specifications.

Q: What is the temperature coefficient difference and does it matter?

A: The CAY17-331JALF has ±250ppm/°C while both substitutes have ±200ppm/°C. The substitutes exhibit better temperature stability. This difference is negligible for most applications and represents an improvement in performance.

Q: Which substitute should I choose for a new design?

A: For applications requiring 62.5mW per element and operating within -55°C to 125°C, select RAVF328RJT330R. For applications with lower thermal requirements and the same temperature range, 746X101331JP is acceptable and offers higher inventory availability.

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