Low Noise Carbon MELF Resistors (RDM)

Direct Carbon Film MELF (RDM) is the cost-effective option.

Commercial grade low power carbon film resistors offer high quality performance for applications that do not require surge protection or precision tolerances.

Providing design engineers with an economical power resistor with high quality performance, Direct Electronics now offers commercial grade low power carbon film resistors. Designated the RDM Series, the conformally coated resistors offer high quality performance for applications that do not require surge protection or precision tolerances.

The commercial grade carbon melf resistors are available in flame retardant packaging and have ideal specifications for consumer electronic or electrical devices. The RDM Series resistors offer a wide resistance range for devices with power ratings below 1W, delivering high quality performance for general purpose applications.

The RDM Series resistors are ideal for general use applications including electrical equipment, small appliances and consumer electronics, such as televisions and other high-volume products.

The RDM Series film resistors feature power ratings from 0.125 to 1W, with a resistance range from 1 Ω to 1M Ω. Standard tolerances for the devices are to ±2% and ±5% with TCRs as low as ±300ppm/°C for values of 1K Ω or less. Maximum working voltage ranges from 200V to 350V.

Contact our sales representative with your specific needs. Download PDF Specification Low Noise Carbon Film MELF Resistors (RDM) (272KB).

Features :
  1. Coating color: Yellow; Marking: Color code (3 color band).
  2. Free direction for mounting due to cylindrical design. Electrodes strength is higher than flat chip resistors.
  3. Specially plated electrodes for high solderability. Lower current noise than flat chip resistors. Lead (Pb)-free and RoHS compliant.
  4. Speciality carbon film technology. DIN: 0204, 0207, 0309.
Applications :
  1. Home appliances, Electrical Equipment, Consumer electronics.
Dimensions (Unit: mm) Carbon Film (RDM)
Carbon Film Low Noise MELF (RDM) Dimensions
Carbon Film Low Noise MELF (RDM) Dimensions
Type RDM73S RDM73P RDM74S RDM74P RDM16M RDM17S RDM17P
DIN-44061 type 0204 0204 0207 0207 0207 0309 0309
Dimensions (Unit: mm) L 3.5±0.2 3.5±0.2 5.9±0.2 5.9±0.2 5.9±0.2 8.5±0.2 8.5±0.2
C (Min.) 0.5 0.5 0.5 0.5 0.5 0.5 0.5
D1 1.40±0.15 1.40±0.15 2.2±0.1 2.2±0.1 2.2±0.1 3.2±0.2 3.2±0.2
D2 (Max.) 1.55 1.55 2.4 2.4 2.4 3.4 3.4
D3 (Max.) 1.25 1.25 2.1 2.1 2.1 3.0 3.0
Characteristics Lower Current Noise (RDM)
Type RDM73S RDM73P RDM74S RDM74P RDM16M RDM17S RDM17P
DIN-44061 type 0204 0204 0207 0207 0207 0309 0309
Power Rating (W) 1/8 1/4 1/4 1/2 1 1/2 1
Resistance Range (Ω) E24 1 ~ 1M
Resistance Tolerance G: ±2%         J: ±5%
Max. Working Voltage (V) 200 250 300 300 350 350 350
Max. Overload Voltage (V) 400 500 600 600 700 700 700
Packaging
& Qty (pcs)
Case 180K 180K 96K 96K 96K 50K 50K
Reel 3K 3K 2K 2K 2K 2.5K 2.5K

Item Characteristics Test Method
Temp. Coefficient (PPM/°C) 0 ~ -350 0 ~ -600 0 ~ -1000 0 ~ -1500 JIS-C(5202-5.2)
>1/4W <10K 11K~115K 160K~2M2 -
1/8W <1K 1K1~47K 51K~470K 510K~1M
Short Time Overload ± (1.0% + 0.05Ω) JIS-C(5202-5.5)
Intermittent ± (1.0% + 0.05Ω) JIS-C(5202-5.8)
Resistance to Soldering ± (1.0% + 0.05Ω) JIS-C(5202-6.4)
Solderability 95% Coverage min JIS-C(5202-6.5)
Moisture Resistance ± (5.0% + 0.1Ω) JIS-C(5202-7.9)
Load Life ± (3.0% + 0.1Ω) JIS-C(5202-7.10)
Order Codes Carbon MELF (RDM)
RDM74P 1R J TR
Part Number
RDM73S
RDM73P
RDM74S
RDM74P
RDM16M
RDM17S
RDM17P
Resistance Value (Ω)
1R2 1.2Ω
12R 12Ω
120R 120Ω
12K 12KΩ
Resistance Tolerance (%)
G ±2%
J ±5%
Package
P Bulk
TR Taping Reel