WR06X42R2FTL Equivalent & Substitute Parts

Part Overview

The WR06X42R2FTL is a 42.2 Ohm ±1% thick film chip resistor manufactured by Walsin Technology Corporation, rated for 0.1W (1/10W) power dissipation in a 0603 (1608 Metric) surface mount package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide design flexibility, supply chain alternatives, and inventory availability options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	42.2 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the WR06X42R2FTL are qualified based on strict electrical and mechanical parameter matching. All substitute components share identical specifications across the following critical parameters:

Resistance value: 42.2 Ohms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package designation: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance status
Moisture sensitivity level: 1 (Unlimited)
Termination count: 2

Physical dimensions (length and width) are identical across all parts. Minor variations in seated height (maximum 0.024" for main part versus 0.022" for substitutes) remain within standard PCB assembly tolerances and do not affect functional compatibility or board-level performance.

Parameter Comparison

Parameter	WR06X42R2FTL (Walsin)	CR-03FL7--42R2 (Viking Tech)	CR1642R2F (Meritek)
Resistance	42.2 Ohms	42.2 Ohms	42.2 Ohms
Tolerance	±1%	±1%	±1%
Power Rating	0.1W	0.1W	0.1W
Package / Case	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)
Composition	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)	0.063" L x 0.031" W (1.60mm x 0.80mm)	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.024" (0.60mm)	0.022" (0.55mm)	0.022" (0.55mm)
Number of Terminations	2	2	2
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

All three components—WR06X42R2FTL (Walsin Technology Corporation), CR-03FL7--42R2 (Viking Tech), and CR1642R2F (Meritek)—are functionally equivalent for direct substitution in 0603 thick film resistor applications requiring 42.2 Ohm ±1% specifications.

Selection criteria based on provided specifications:

Compliance & Certification: All parts maintain ROHS3 compliance status. The WR06X42R2FTL and CR1642R2F carry REACH Unaffected designation. The CR-03FL7--42R2 does not list REACH status in provided data.

Product Status: All three components are classified as Active, indicating current manufacturing and availability.

Inventory Availability: CR-03FL7--42R2 (Viking Tech) offers 5,657 pieces in stock. CR1642R2F (Meritek) provides 6,029 pieces. WR06X42R2FTL (Walsin) has 661 pieces available.

Physical Compatibility: All parts are identical in length (0.063") and width (0.031"). Seated height variation (0.024" maximum for Walsin versus 0.022" maximum for Viking Tech and Meritek) is within standard PCB assembly clearance tolerances and does not impact board-level integration.

Electrical Performance: Resistance, tolerance, power rating, temperature coefficient, and operating temperature range are identical across all three parts, ensuring equivalent circuit performance.

Frequently Asked Questions (FAQ)

Q: Can CR-03FL7--42R2 or CR1642R2F be used as direct replacements for WR06X42R2FTL?

A: Yes. Both substitute parts meet all electrical specifications (42.2 Ohms ±1%, 0.1W, ±100ppm/°C, -55°C ~ 155°C operating range) and mechanical requirements (0603 package, 2 terminations). All three components are thick film construction with identical dimensional footprints.

Q: Does the height difference between parts affect PCB assembly?

A: No. The maximum seated height variation is 0.002" (0.05mm), which falls within standard PCB assembly tolerances. This difference does not impact component placement, solder reflow, or board clearance requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. WR06X42R2FTL, CR-03FL7--42R2, and CR1642R2F all carry ROHS3 Compliant designation.

Q: What is the moisture sensitivity rating for these parts?

A: All three components have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. All three components share identical operating temperature range specifications of -55°C ~ 155°C and identical temperature coefficient of ±100ppm/°C, ensuring equivalent performance across the full temperature range.

Q: Are there differences in REACH or ECCN compliance between the parts?

A: WR06X42R2FTL and CR1642R2F both carry REACH Unaffected status. CR-03FL7--42R2 does not list REACH status in provided specifications. All three components are classified as ECCN EAR99 (with CR-03FL7--42R2 listed under HTSUS 8533.40.0000 versus 8533.21.0030 for the other two parts).

Q: What packaging format is used for these components?

A: All three parts are supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly operations.

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