RT0402DRE07124RL Equivalent & Substitute Parts

Part Overview

The RT0402DRE07124RL is a 124 Ohm thin film chip resistor in 0402 (1005 Metric) package manufactured by YAGEO. This surface mount resistor delivers 0.063W (1/16W) power rating with ±0.5% tolerance and operates across -55°C to 155°C. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when electrical specifications (resistance value, power rating, package) and mechanical dimensions remain compatible, allowing direct circuit board replacement without design modification.

Key Parameters

Parameter	Value
Resistance	124 Ohms
Tolerance	±0.5%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thin Film
Operating Temperature	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by three core criteria:

Electrical Equivalence: Resistance value (124 Ohms) and power rating (0.063W) must match exactly. Tolerance may vary (±0.5% to ±0.1%) without affecting circuit function, as tighter tolerance represents an upgrade path.
Package Compatibility: All substitute parts must use 0402 (1005 Metric) package with identical footprint dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm) and compatible height specifications (0.014" to 0.016" seated maximum).
Compliance & Environmental: All parts maintain ROHS3 compliance, MSL 1 rating, and -55°C to 155°C operating range, ensuring regulatory and environmental compatibility.

The four identified substitutes meet these criteria while offering enhanced tolerance specifications (±0.1%) and, in select cases, automotive qualification (AEC-Q200) or anti-sulfur features.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coefficient	Package	Height (Max)	Features	Inventory
RT0402DRE07124RL	YAGEO	124 Ohms	±0.5%	0.063W	±50ppm/°C	0402	0.014"	—	871 Pcs
RT0402BRE07124RL	YAGEO	124 Ohms	±0.1%	0.063W	±50ppm/°C	0402	0.014"	—	9134 Pcs
CPF0402B124RE1	TE Connectivity	124 Ohms	±0.1%	0.063W	±25ppm/°C	0402	0.014"	—	1156 Pcs
ERA-2AEB1240X	Panasonic	124 Ohms	±0.1%	0.063W	±25ppm/°C	0402	0.016"	Automotive AEC-Q200	7999 Pcs
RG1005P-1240-B-T5	Susumu	124 Ohms	±0.1%	0.063W	±25ppm/°C	0402	0.016"	Anti-Sulfur, Automotive AEC-Q200	5994 Pcs

Engineering Selection Recommendations

RT0402BRE07124RL (YAGEO) — Direct upgrade from the main part. Identical manufacturer, package, and dimensions with improved ±0.1% tolerance. Highest inventory availability (9134 pcs) supports production continuity.

CPF0402B124RE1 (TE Connectivity) — Equivalent substitute with ±0.1% tolerance and reduced temperature coefficient (±25ppm/°C vs. ±50ppm/°C). Suitable for applications requiring tighter thermal stability. Lower inventory (1156 pcs).

ERA-2AEB1240X (Panasonic) — Automotive-qualified substitute (AEC-Q200) with ±0.1% tolerance and ±25ppm/°C temperature coefficient. Maximum seated height 0.016" remains within compatibility margins. Recommended for automotive or high-reliability applications. Strong inventory (7999 pcs).

RG1005P-1240-B-T5 (Susumu) — Automotive-qualified substitute (AEC-Q200) with anti-sulfur feature, ±0.1% tolerance, and ±25ppm/°C temperature coefficient. Maximum seated height 0.016" compatible with standard 0402 footprints. Optimal for harsh or corrosive environments. Inventory 5994 pcs.

All substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can RT0402BRE07124RL replace RT0402DRE07124RL directly?

A: Yes. Both parts are YAGEO 0402 thin film resistors with 124 Ohm resistance and 0.063W power rating. RT0402BRE07124RL offers tighter ±0.1% tolerance as an upgrade. Footprint and height specifications are identical.

Q: What is the difference between ±0.5% and ±0.1% tolerance?

A: Tolerance defines the maximum deviation from the nominal 124 Ohm value. ±0.5% allows 123.38–124.62 Ohm range; ±0.1% restricts to 123.876–124.124 Ohm range. Tighter tolerance suits precision analog circuits; standard tolerance suffices for digital or non-critical applications.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive designs?

A: Yes. AEC-Q200 qualification indicates enhanced reliability testing and environmental stress screening. These parts exceed standard requirements and function in any application accepting the original part's specifications.

Q: Does the 0.016" maximum height of ERA-2AEB1240X and RG1005P-1240-B-T5 affect PCB assembly?

A: No. Both heights (0.014" and 0.016") fall within standard 0402 package tolerances and are compatible with automated pick-and-place equipment and standard reflow profiles. Verify footprint clearance in your specific PCB design.

Q: What is the anti-sulfur feature in RG1005P-1240-B-T5?

A: Anti-sulfur coating protects the resistor element from hydrogen sulfide and other corrosive gases in industrial or marine environments, extending component lifespan and reliability in harsh conditions.

Q: Can I mix different substitute parts in the same production batch?

A: Electrically, yes—all substitutes meet the 124 Ohm ±0.1% specification. However, manufacturing best practices recommend using a single part number per design revision to maintain traceability, simplify inventory management, and ensure consistent performance characteristics across production lots.

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