ERJ-S1TJ201U Equivalent & Substitute Parts

Part Overview

The ERJ-S1TJ201U is a 200 Ohms ±5% 1W thick film chip resistor in 2512 (6432 Metric) package manufactured by Panasonic Electronic Components. This part features anti-sulfur coating and automotive AEC-Q200 qualification, designed for high-reliability applications in harsh environments. The product is currently active and available in high volume (776 pcs in stock). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and automotive qualification standards to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	200 Ohms
Tolerance	±5%
Power Rating	1W
Package / Case	2512 (6432 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ERJ-S1TJ201U are classified based on the following substitution criteria:

Direct Equivalents (1W Power Rating): Parts matching all key parameters—200 Ohms resistance, ±5% tolerance, 1W power rating, 2512 package, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 automotive qualification. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Parts (1W Power Rating, Reduced Features): Parts with identical electrical specifications and package but without anti-sulfur coating or with different product status (Not For New Designs). These remain electrically compatible but may have different environmental performance characteristics.

Enhanced Alternatives (Higher Power Rating): Parts rated at 1.5W or 2W with identical resistance, tolerance, package, and temperature coefficient. These provide increased power dissipation capability while maintaining mechanical and electrical compatibility. Selection depends on thermal design requirements.

Cross-Manufacturer Equivalents: Parts from Bourns Inc., Vishay Dale, and Stackpole Electronics Inc. with matching specifications and AEC-Q200 qualification, providing supply chain alternatives from qualified automotive suppliers.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Features
ERJ-S1TJ201U	Panasonic	200Ω	±5%	1W	2512	±200ppm/°C	-55~155°C	Yes	Active	Anti-Sulfur
ERJ-1TYJ201U	Panasonic	200Ω	±5%	1W	2512	±200ppm/°C	-55~155°C	Yes	Not For New Designs	None
CR2512-JW-201ELF	Bourns Inc.	200Ω	±5%	1W	2512	±200ppm/°C	-55~155°C	No	Active	None
CRM2512AJW-201ELF	Bourns Inc.	200Ω	±5%	2W	2512	±200ppm/°C	-55~155°C	Yes	Active	Anti-Sulfur, Pulse Withstanding
CRCW2512200RJNEG	Vishay Dale	200Ω	±5%	1W	2512	±200ppm/°C	-55~155°C	Yes	Active	None
CRCW2512200RJNEGHP	Vishay Dale	200Ω	±5%	1.5W	2512	±200ppm/°C	-55~155°C	Yes	Active	Pulse Withstanding
CRM2512-JW-201ELF	Bourns Inc.	200Ω	±5%	2W	2512	±200ppm/°C	-55~155°C	No	Active	Current Sense
RMCF2512JT200R	Stackpole Electronics	200Ω	±5%	1W	2512	±200ppm/°C	-55~155°C	Yes	Active	None

Engineering Selection Recommendations

For Direct Replacement (1W Applications): Select CRCW2512200RJNEG (Vishay Dale) or RMCF2512JT200R (Stackpole Electronics) when equivalent performance to ERJ-S1TJ201U is required. Both parts maintain AEC-Q200 automotive qualification, active product status, and identical electrical specifications. CRCW2512200RJNEG offers the highest inventory availability (74,257 pcs).

For Panasonic Continuity: ERJ-1TYJ201U provides electrical equivalence but carries "Not For New Designs" status. Use only for legacy system support or when Panasonic supply chain preference is mandated.

For Enhanced Thermal Performance: CRM2512AJW-201ELF (Bourns, 2W) or CRCW2512200RJNEGHP (Vishay Dale, 1.5W) are suitable when circuit design permits higher power dissipation capability. Both maintain AEC-Q200 qualification and -55°C to 155°C operating range. CRM2512AJW-201ELF adds anti-sulfur coating and pulse withstanding features matching the original part's environmental robustness.

For Current Sense Applications: CRM2512-JW-201ELF (Bourns, 2W) is specified for current sensing circuits where the "Current Sense" feature designation applies.

Compliance Verification: All recommended substitutes maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can ERJ-1TYJ201U replace ERJ-S1TJ201U in new designs?

A: ERJ-1TYJ201U is electrically equivalent but marked "Not For New Designs." It is suitable only for legacy system maintenance or replacement applications. For new designs, use active-status alternatives such as CRCW2512200RJNEG or RMCF2512JT200R.

Q: What is the difference between 1W, 1.5W, and 2W variants?

A: Power rating indicates maximum continuous power dissipation capability. The 1W ERJ-S1TJ201U is suitable for circuits dissipating up to 1W. The 1.5W (CRCW2512200RJNEGHP) and 2W variants (CRM2512AJW-201ELF, CRM2512-JW-201ELF) provide higher thermal headroom for applications with greater power dissipation. All variants share identical resistance, tolerance, package, and temperature coefficient.

Q: Are all substitute parts AEC-Q200 qualified?

A: No. CR2512-JW-201ELF and CRM2512-JW-201ELF lack AEC-Q200 designation. For automotive applications requiring AEC-Q200 compliance, select from CRCW2512200RJNEG, CRCW2512200RJNEGHP, CRM2512AJW-201ELF, or RMCF2512JT200R.

Q: Does the anti-sulfur coating affect electrical performance?

A: Anti-sulfur coating is an environmental protection feature that does not alter electrical characteristics. Parts with and without this coating maintain identical resistance, tolerance, and temperature coefficient values. Selection depends on application environment exposure requirements.

Q: Are mechanical dimensions identical across all substitutes?

A: All parts use the 2512 (6432 Metric) package with minor dimensional variations within tolerance. Length ranges from 0.248" to 0.252", width from 0.122" to 0.126", and height from 0.028" to 0.031". These variations are within standard PCB footprint design margins and do not require layout modification.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape for automated assembly. Cut Tape & Digi-Reel packaging provides smaller quantities on cut tape segments. Both formats contain identical components; packaging selection depends on production volume and assembly equipment compatibility.

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