Bourns 4606X-102-203 Equivalent & Substitute Parts

Part Overview

The Bourns 4606X-102-203 is a 20kΩ isolated resistor network array with three resistor elements in a 6-SIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part delivers 300mW power per element with ±2% tolerance and ±100ppm/°C temperature coefficient across an operating range of -55°C to 125°C. Substitute parts maintain functional equivalence while offering improved availability and compliance status.

Key Parameters

Parameter	Specification
Resistance Value	20kΩ
Tolerance	±2%
Number of Resistors	3
Circuit Type	Isolated
Power Per Element	300mW
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 125°C
Package Type	6-SIP
Mounting Type	Through Hole
Number of Pins	6

Substitute Part Grouping Explanation

Substitution for the 4606X-102-203 is determined by strict equivalence across the following critical parameters: resistance value (20kΩ), tolerance (±2%), number of resistor elements (3), circuit topology (isolated), power rating per element (300mW), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 125°C), package type (6-SIP), and mounting method (through hole).

The substitute parts are grouped into two categories:

Direct Substitutes (Same Series): Parts maintaining identical specifications within the 4600X series, differing only in packaging format or compliance status.

Cross-Series Substitutes (4300R Series): Parts from the Bourns 4300R series that meet all functional and electrical requirements, with minor dimensional variations and enhanced resistor-ratio-drift specification (50ppm/°C vs. unspecified in main part).

Parameter Comparison

Parameter	4606X-102-203	4606X-102-203LF	4306R-102-203	4306R-102-203LF
Resistance (Ohms)	20k	20k	20k	20k
Tolerance	±2%	±2%	±2%	±2%
Number of Resistors	3	3	3	3
Circuit Type	Isolated	Isolated	Isolated	Isolated
Power Per Element	300mW	300mW	300mW	300mW
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	6-SIP	6-SIP	6-SIP	6-SIP
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Number of Pins	6	6	6	6
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	ROHS3 Compliant
Resistor-Ratio-Drift	Not specified	Not specified	50ppm/°C	50ppm/°C
Size / Dimension	0.598" L x 0.098" W (15.19mm x 2.49mm)	0.598" L x 0.098" W (15.19mm x 2.49mm)	0.584" L x 0.085" W (14.83mm x 2.16mm)	0.584" L x 0.085" W (14.83mm x 2.16mm)
Height - Seated (Max)	0.200" (5.08mm)	0.200" (5.08mm)	0.195" (4.95mm)	0.195" (4.95mm)

Engineering Selection Recommendations

For New Designs or Active Procurement: Select 4606X-102-203LF or 4306R-102-203LF. Both parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The 4606X-102-203LF maintains identical dimensions to the original part, minimizing PCB layout modifications. The 4306R-102-203LF offers slightly reduced physical dimensions with enhanced resistor-ratio-drift specification (50ppm/°C).

For Legacy System Maintenance: The 4606X-102-203LF provides the most direct replacement with no dimensional changes. If dimensional constraints permit, 4306R-102-203LF offers superior thermal stability through improved resistor-ratio-drift performance.

Compliance Considerations: The original 4606X-102-203 is RoHS non-compliant. Designs requiring RoHS3 compliance must transition to either 4606X-102-203LF or 4306R-102-203LF. The 4306R series parts are REACH-affected; verify supply chain requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can 4606X-102-203LF directly replace 4606X-102-203 without PCB modification?

A: Yes. The 4606X-102-203LF maintains identical package dimensions (0.598" L x 0.098" W, 0.200" max height), pin count (6), and electrical specifications. No PCB layout changes are required.

Q: What is the functional difference between 4606X-102-203LF and 4306R-102-203LF?

A: Both parts meet all core electrical requirements (20kΩ, ±2%, 300mW, ±100ppm/°C). The 4306R series specifies resistor-ratio-drift at 50ppm/°C, whereas the 4606X series does not specify this parameter. The 4306R parts are slightly smaller (0.584" L x 0.085" W vs. 0.598" L x 0.098" W).

Q: Are there packaging differences between substitute parts?

A: Yes. The 4606X-102-203LF is supplied in bulk packaging, while 4306R-102-203 and 4306R-102-203LF are supplied in tube packaging. All parts use the same 6-SIP through-hole package type and are compatible with standard PCB assembly processes.

Q: Which substitute part offers the best long-term availability?

A: Both 4606X-102-203LF and 4306R-102-203LF are active products. Current inventory levels show 2186 units for 4606X-102-203LF and 748 units for 4306R-102-203LF. Verify with your supplier for long-term availability commitments.

Q: Do substitute parts meet RoHS requirements?

A: Yes. Both 4606X-102-203LF and 4306R-102-203LF are ROHS3 compliant. The original 4606X-102-203 is RoHS non-compliant. For applications requiring RoHS certification, use only the LF-suffix variants.

Q: Can I use 4306R parts in designs originally specified for 4606X?

A: Yes, provided PCB layout accommodates the slightly smaller dimensions (0.584" L x 0.085" W vs. 0.598" L x 0.098" W). All electrical and thermal specifications are equivalent or superior. Verify mechanical clearances before implementation.

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