CSR0204FTCU1001 0204 1K 0.25W 1% 25ppm/℃ Metal Film MELF Resistor – Comprehensive Analysis
1. Product Number Decoding
CSR0204FTCU1001 is a specific model from Ellon's CSR series of metal film MELF resistors. The product number follows industry-standard coding:
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CSR – Series code, representing Ellon's Cylindrical Resistor product line;
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0204 – Package size, corresponding to 3.50×1.40mm cylindrical dimensions;
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F – Tolerance code, indicating ±1% resistance accuracy;
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TC – Temperature coefficient code, indicating ±25ppm/℃ TCR;
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U – Packaging code, indicating tape and reel packaging;
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1001 – Resistance value code, representing 1KΩ (1000Ω).
2. Product Characteristics
The 0204 1K 0.25W 1% 25ppm/℃ resistor belongs to the metal film MELF (Metal Electrode Leadless Face) resistor category.
Electrical performance: 0.25W power rating is standard for the 0204 package. ±1% tolerance qualifies as precision grade. ±25ppm/℃ TCR ensures stable resistance across temperature variations. Working voltage is 200V with overload voltage up to 400V.
Construction: The leadless cylindrical design sits between traditional chip resistors and through-hole resistors. Compared to thick film chip resistors, metal film offers lower noise; compared to through-hole types, the absence of leads eliminates parasitic inductance.
Reliability: The cylindrical structure provides excellent vibration and thermal shock resistance. The product complies with EU RoHS and REACH requirements.
3. Applications
The 0204 1K 0.25W 1% 25ppm/℃ metal film MELF resistor finds broad applications across multiple industries:
Industrial power supplies – power converters, UPS systems; outdoor lighting – LED drivers and controllers; automotive electronics – vehicle control boards; industrial control – PLCs, inverters, servo drives; new energy – BMS, chargers, PV inverters; home appliances – control boards for air conditioners, refrigerators; plus communications, medical equipment, and measurement devices.
4. Advantages
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Precision and stability – ±1% tolerance with ±25ppm/℃ TCR;
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Non-inductive – no parasitic inductance, ideal for high-frequency and pulse applications;
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High mechanical strength – superior vibration and thermal shock resistance;
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Excellent heat dissipation – cylindrical structure provides effective thermal pathways;
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Compact size – 3.50×1.40mm footprint optimizes PCB space.
5. Market Positioning
The 0204 1K 0.25W 1% 25ppm/℃ MELF resistor targets the mid-to-high-end precision resistor market, positioned between standard thick film chip resistors and high-precision thin film resistors. Bulk pricing ranges from approximately RMB 0.18 to 0.66 per unit. Primary customers include industrial power designers, automotive electronics engineers, and industrial control developers.
6. Brand Introduction
Ellon is a London-headquartered electronic component manufacturer specializing in high-precision, long-life, miniaturized components. Product lines include high-precision thin film SMD resistors, current sensing SMD resistors, high-frequency SMD components, low-ohm metal strip chip resistors, high-current high-power molded inductors, power chokes, and MLCCs.
The CSR series metal film MELF resistors are among Ellon's core offerings, available in 0102, 0204, and 0207 packages. In China, Ellon products are distributed through authorized partners including Shenzhen Shunhai Technology Co., Ltd. and Hua Nian Mall (www.hnstshop.com)[reference:123], where customers can source the 0204 1K 0.25W 1% 25ppm/℃ metal film MELF resistor, request samples, and access technical documentation.
