RG1608Q-21R0-D-T5 Equivalent & Substitute Parts

Part Overview

The RG1608Q-21R0-D-T5 is a 21 Ohm ±0.5% thin film chip resistor manufactured by Susumu in 0603 (1608 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation and features anti-sulfur coating with automotive AEC-Q200 qualification. The part is active in production with 904 units currently in stock. Substitute parts are identified to address inventory availability, extended lead times, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within design tolerances.

Substiute Parts

RG1608Q-21R0-D-T5

SusumuIn Stock: 917RG1608Q-21R0-D-T5 Datasheet

Current PartRFQ

RP73PF1J21RBTDF

TE Connectivity Passive ProductIn Stock: 1954RP73PF1J21RBTDF Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RG1608Q-21R0-D-T5 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 21 Ohms
• Package format: 0603 (1608 Metric)
• Composition: Thin Film
• Operating temperature range: -55°C ~ 155°C
• Number of terminations: 2
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

Allowable Variation Parameters:

• Tolerance: May be tighter (lower value) than ±0.5%
• Power rating: May be equal to or greater than 0.1W
• Temperature coefficient: May be tighter (lower value) than ±50ppm/°C
• Physical dimensions: Minor variations within 0603 package specification

The RP73PF1J21RBTDF meets all mandatory matching parameters and provides improved electrical characteristics with tighter tolerance (±0.1%) and lower temperature coefficient (±25ppm/°C), while maintaining identical package format and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The RP73PF1J21RBTDF substitute part is electrically and mechanically compatible with the RG1608Q-21R0-D-T5 for applications where the following conditions are met:

Electrical Compatibility: The substitute part provides superior electrical performance with tighter tolerance (±0.1% versus ±0.5%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C). The increased power rating (0.167W versus 0.1W) provides additional thermal margin without affecting circuit operation. Both parts maintain identical 21 Ohm resistance and -55°C ~ 155°C operating temperature range.

Mechanical Compatibility: Both parts conform to 0603 (1608 Metric) package format with identical width (0.031" / 0.80mm). Minor dimensional variations in length (0.063" to 0.061") and height (0.020" to 0.022") remain within standard 0603 package tolerances and do not affect PCB layout or assembly processes.

Compliance and Certification: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. The main part includes automotive AEC-Q200 qualification; the substitute part does not specify this certification. Selection should account for automotive qualification requirements in the target application.

Product Status: Both parts are active in production with adequate inventory availability (904 units for main part, 1862 units for substitute part).

Frequently Asked Questions (FAQ)

Q: Can the RP73PF1J21RBTDF directly replace the RG1608Q-21R0-D-T5 in existing designs?

A: Yes, for non-automotive applications. Both parts share identical 21 Ohm resistance, 0603 package format, and -55°C ~ 155°C operating temperature range. The substitute part offers improved tolerance and temperature coefficient. However, the main part carries AEC-Q200 automotive qualification while the substitute does not. Automotive applications must verify qualification requirements before substitution.

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

A: The primary differences are tolerance (±0.1% versus ±0.5%), temperature coefficient (±25ppm/°C versus ±50ppm/°C), power rating (0.167W versus 0.1W), and manufacturer (TE Connectivity versus Susumu). The substitute part provides tighter electrical specifications and higher power dissipation capability. The main part includes anti-sulfur coating and AEC-Q200 automotive certification.

Q: Are there any PCB layout considerations when substituting these parts?

A: Minimal layout impact exists. The substitute part is slightly shorter (0.061" versus 0.063") and slightly taller (0.022" versus 0.020"), but both conform to standard 0603 package dimensions. PCB footprints designed for 0603 components accommodate both parts without modification. Verify clearance for the 0.002" height increase in space-constrained applications.

Q: Which part should be selected for new designs?

A: Selection depends on application requirements. For automotive applications requiring AEC-Q200 qualification, use the RG1608Q-21R0-D-T5. For general industrial or consumer applications where tighter tolerance and lower temperature coefficient provide circuit performance benefits, the RP73PF1J21RBTDF is suitable. Both parts are active in production with adequate inventory.

Q: Are both parts RoHS compliant?

A: Yes. Both the RG1608Q-21R0-D-T5 and RP73PF1J21RBTDF are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard manufacturing and storage conditions.

Q: What is the impact of the tighter tolerance on circuit performance?

A: The RP73PF1J21RBTDF tolerance of ±0.1% provides resistance values within a narrower range (20.979 Ohms to 21.021 Ohms) compared to the main part's ±0.5% tolerance (20.895 Ohms to 21.105 Ohms). This tighter tolerance reduces circuit parameter variation and improves predictability in precision applications. The lower temperature coefficient (±25ppm/°C) also reduces resistance drift across the operating temperature range.