product guide
SMC
SURFACE MOUNT CYLINDRICAL
MELF STYLE
METAL FILM PRECISION RESISTOR
±.05% to ±1% T.C.R. ±5 to ±100PPM
Construction
| 1 | Insulation Coating | 4 | Electrode Cap |
| 2 | Trimming Line | 5 | Resistor Layer |
| 3 | Ceramic Rod | 6 | Marking |
Dimensions (Unit: mm)
| Type | L | ΦD | K min. | Weight (g) (1000 pcs) |
Packaging |
|---|---|---|---|---|---|
| 180mm (7") | |||||
| SMC0204 | 3.50±0.20 | 1.40±0.15 | 0.5 | 18.7 | 3,000EA |
| SMC0207 | 5.90±0.20 | 2.20±0.20 | 0.5 | 80.9 | 2,000EA |
Features
- Excellent overall stability
- Tight tolerance down to ±0.05%
- Extremely low TCR down to ±5 PPM/°C
- High power rating up to 1 Watts
Applications
- Automotive
- Telecommunication
- Medical Equipment
- Measurement/Testing Equipment
Derating Curve
Standard Electrical Specifications
| Item | Power Rating at 70°C |
Operating Temp. Range |
Max. Operating Voltage |
Max. Overload Voltage |
Resistance Range | TCR PPM/°C |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | ±0.05% | ±0.1% | ±0.25% | ±0.5% | ±1% | ±5% | |||||
| 0204 | 1/4W | -55 ~ +155°C | 200V | 400V | 49.9Ω-600KΩ | ±5 | |||||
| 49.9Ω-600KΩ | ±10 | ||||||||||
| 49.9Ω-600KΩ | ±15 | ||||||||||
| 10Ω-1MΩ | 10Ω-4.7MΩ | ±25 | |||||||||
| 10Ω-1MΩ | 1Ω-1MΩ | 0.2Ω-10MΩ | ±50 | ||||||||
| - | 0.1Ω-10MΩ | ±100 | |||||||||
| Jumper: 2A | 0Ω(<15mΩ) | - | |||||||||
| 0207 | 1/2W | -55 ~ +155°C | 300V | 500V | 49.9Ω-1MΩ | ±5 | |||||
| 49.9Ω-1MΩ | ±10 | ||||||||||
| 49.9Ω-3MΩ | ±15 | ||||||||||
| 20Ω-1MΩ | 10Ω-3MΩ | 10Ω-4.7MΩ | ±25 | ||||||||
| 10Ω-1MΩ | 1Ω-1MΩ | 0.2Ω-10MΩ | ±50 | ||||||||
| - | 0.1Ω-10MΩ | ±100 | |||||||||
| Jumper: 4A | 0Ω(<15mΩ) | - | |||||||||
High Power Rating Electrical Specifications
| Item | Power Rating at 70°C |
Operating Temp. Range |
Max. Operating Voltage |
Max. Overload Voltage |
Resistance Range | TCR PPM/°C |
||||
|---|---|---|---|---|---|---|---|---|---|---|
| Type | ±0.1% | ±0.25% | ±0.5% | ±1% | ±5% | |||||
| 0207 | 1W | -55 ~ +155°C | 350V | 700V | 49.9Ω-100KΩ | ±15 | ||||
| 10Ω-1MΩ | ±25 | |||||||||
| 10Ω-1MΩ | 1Ω-1MΩ | 0.2Ω-10MΩ | ±50 | |||||||
| - | 0.1Ω-10MΩ | ±100 | ||||||||
Environmental Characteristics
| Item | Requirement | Test Method |
|---|---|---|
| Temperature Coefficient of Resistance (T.C.R.) | As Spec. | -55°C~+125°C is the reference temperature |
| Short Time Overload | ±(0.15%+0.05Ω) | RCWV*2.5 or Max. overload voltage for 5 seconds |
| Insulation Resistance | ≥10G | Max. overload voltage for 1 minute |
| Endurance | ±(0.5%+0.05Ω) | 70±2°C, Max. working voltage for 1000 hrs with 1.5 hrs "ON" and 0.5 hrs "OFF" |
| Damp Heat with Load | ±(1.0%+0.05Ω) | 40±"2°C, 90~95% R.H. Max. working voltage for 1000 hrs with 1.5 hrs "ON" and 0.5 hrs "OFF" |
| Dry Heat | ±(1.0%+0.05Ω) | at +155°C for 1000 hrs |
| Bending Strength | ±(0.5%+0.05Ω) | Bending once for 5 seconds with 2mm |
| Solderability | 95% min. coverage | 245±5°C for 3 seconds |
| Resistance to Soldering Heat | ±(0.5%+0.05Ω) | 260±5°C for 10 seconds |
| Voltage Proof | No breakdown or flashover | 1.42 times RCWV (RMS) for 1 minute |
| Leaching | Individual leaching area ≤5% Total leaching area ≤ 10% |
260±5°C for 30 seconds |
| Rapid Change of Temperature | ±(0.5%+0.05Ω) | -55°C to +125°C, 5 cycles |
Reference Standards: IEC 60115-1 ; JIS-C 5201-1
Storage Temperature: 25±3°C; Humidity < 80%RH
How to Order: (example: 1/4W 10 OHM 1% 50PPM T/R)
0204
- TYPE
-
- 0204: 1/4W
- 0207: 1/2W
- 0207A: 1W
0100
- Resistance
-
- 0100: 10Ω
- 1000: 100Ω
- 2201: 2200Ω
- 1001: 1KΩ
- 1004: 1MΩ
- R0R0: 0Ω
- R050: 0.05Ω
- R100: 0.1Ω
F
- RESISTANCE
TOLERANCE -
- A: ±0.05%
- B: ±0.1%
- C: ±0.25%
- D: ±0.5%
- F: ±1%
- J: ±5%
D
- TCR
(PPM/°C) -
- A: ±5
- B: ±10
- N: ±15
- C: ±25
- D: ±50
- E: ±100
T
- Packaging Code
-
- T: Taping Reel
- B: Bulk