TyoHM RN2WS20KFT BA1 Precision Metal Film Fixed Resistors with Low Voltage Coefficient and Stability

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Product Description

Product Overview

Precision Metal Film Fixed Resistors from SHI MENG ELECTRONIC CO.,LTD. offer high accuracy, stability, and reliability with low noise and a small voltage coefficient. They are designed for various applications requiring precise resistance values and are compliant with RoHS and REACH environmental regulations.

Product Attributes

Brand: SHI MENG ELECTRONIC CO.,LTD.
Certifications: RoHS, REACH
Material: Ni Cr alloy conductive layer
Color: Blue epoxy resin coating (standard), Grey or Brick Red (special order)

Technical Specifications

Type	Rated Power	Tolerance	Resistance Range	Temperature Coefficient (T.C.R)	Max Continuous Working Voltage	Max Overload Voltage	Insulation Resistance Voltage	Operating Temp Range
1/8W	1/8W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	200V	400V	300V	-55 ~ +125
1/6W	1/6W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	250V	500V	350V	-55 ~ +125
1/4WS	1/4W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	350V	700V	500V	-55 ~ +125
1/2WSS	1/2W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1/4W	1/4W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1/2WS	1/2W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1WSS	1W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1/2W	1/2W	0.1% to 1%	0 & 0.1~10M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1WS	1W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
2WSS	2W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
1W	1W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
2WS	2W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
2W	2W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	500V	-55 ~ +125
3WS	3W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	700V	-55 ~ +125
3W	3W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	700V	-55 ~ +125
5WS	5W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	700V	-55 ~ +125
5W	5W	0.1% to 1%	0.1~2M	15PPM/C, 25PPM/C, 50PPM/C, 100PPM/C	500V	1000V	700V	-55 ~ +125

Construction

Component Breakdown:

Tinned copper lead wire
High heat exchanged ceramic base
Tin-plated steel caps
High stability Electric conduction film
Color ring Mark
Epoxy resin coating (Standard: Blue; Special order: Grey or Brick Red non-combustible finish for 5W products due to higher surface temperature)

Glossary

Rated resistance: Designed resistance value usually indicated on the resistor.
Rated Ambient Temperature: Maximum ambient temperature at which the power rating may be applied continuously. Refers to the temperature around the resistor inside equipment.
Rated power: Maximum power allowed at 70 ambient temperature during durability test, without exceeding specified resistance change.
Derating curve: Used to determine rated power when ambient temperature exceeds 70.
Rated Voltage: Maximum D.C. or A.C. voltage (rms) continuously applied under rated ambient or terminal temperature. Calculated from rated power and nominal resistance. Shall not exceed maximum working voltage.
Critical Resistance: Maximum nominal resistance value allowing rated power application without exceeding maximum working voltage.
Maximum Working Voltage: Maximum D.C. or A.C. voltage (rms) continuously applied to the terminations.
Allowable voltage: Voltage applied for 5 seconds during short-time overload test, typically 2.5 times rated voltage or maximum overload voltage, whichever is lower.

Precautions for Use

For high resistance values (hundreds of K ohm), the thin Ni-Cr alloy film may reduce reliability, especially in high humidity environments. Consider alternative resistor types for high-reliability designs.
For ultra-high resistance values, consider MG High Voltage Surge Resistors or CHIP resistors.
For low and ultra-low resistance values where temperature coefficient or current capability is critical, consider KN Wire Wound Resistors.
Precision metal film resistors have thinner films compared to other thin-film types, making them less resistant to pulses. Avoid using high resistance values in high-pulse or continuous pulse circuits.
The conductive composition is prone to oxidation at high temperatures. Ensure adequate heat dissipation and avoid using glues for fixing or potting on the resistor surface, as they can impede heat dissipation and potentially cause electrochemical reactions leading to failure.