Product Overview
The PCF ceramic resistors are designed for anti-pulse surge applications, leveraging KOA's original bulk ceramic resistor technology. These non-inductive resistors feature a flame retardant coating (equivalent to UL94V0) and offer excellent in-pulse and inrush current characteristics. They provide higher reliability against disconnection compared to wirewound and film resistors and are AEC-Q200 tested. Products meet EU RoHS requirements.
Product Attributes
- Brand: KOA
- Origin: KOA original bulk ceramic resistors
- Coating: Flame retardant (Equivalent of UL94V0)
- Certifications: EU RoHS compliant, AEC-Q200 Tested
- Construction: Non-inductive resistors
Technical Specifications
Ordering Information:
| Element | Description |
|---|---|
| Nominal Resistance | 2 significant figures + 1 multiplier |
| Power Rating | 1/2: 0.5W, 1: 1W, 2: 2W |
| Type | PCF |
| Termination Material | C: SnCu |
| Packaging | R: Reel |
| Tolerance | K: 10%, M: 20% |
Dimensions and Construction:
| Type | L (max.) inches (mm) | C (max.) inches (mm) | D (nom.) inches (mm) | d (nom.) inches (mm) | inches (mm) |
|---|---|---|---|---|---|
| PCF1/2 | 1.18.118 (30.03.0) | 0.65.039 (16.51.0) | 0.276.039 (7.01.0) | 0.031 (0.8) | .138.02 (3.50.5) |
| PCF1 | 1.50.118 (38.03.0) | 0.748.039 (19.01.0) | 0.437 (11.1) | .028 (0.7) | .217.039 (5.51.0) |
| PCF2 | .886 (22.5) | .748.039 (19.01.0) | .748.039 (19.01.0) | .031 (0.8) | .354.039 (9.01.0) |
* Lead length changes depending on taping type.
Taping Types:
| Type | T52 | T631 |
|---|---|---|
| PCF1/2 | Axial Taping | |
| PCF1 | Axial Taping | |
| PCF2 | Axial Taping |
Contact us for lead forming details.
Performance Characteristics:
| Parameter | Requirement R (% + 0.05) | Limit | Typical | Test Method |
|---|---|---|---|---|
| Resistance | Within regulated to tolerance | |||
| T.C.R. | +25C/-40C, +25C/+75C and +25C/+125C | |||
| Voltage Coefficient (Apply for over 1k) | 0~-0.2%/V | Rated voltage and rated voltage x 10% | ||
| Overload | 2% | 0.4% | Rated voltage x 2.5 or maximum overload voltage for 5s, whichever less | |
| Resistance to soldering heat | 2% | 0.8% | 350C10C, 3.5s0.5s | |
| Rapid change of temperature | 2% | 0.4% | -40C (30 min.)/+85C (30 min.), 5 cycles | |
| Moisture resistance | 5% | 0.6% | 40C2C, 90%~95%RH, 1000 hours, 1.5h ON/0, 5h OFF cycles | |
| Load life | 5% | 0.4% | 70C2C, 1000h, 1.5h ON/0, 5h OFF cycles | |
| Resistance to Solvent | No abnormality in appearance. Marking shall be easily legible. | Dipping in IPA or Xylene for 3 minutes and leaving for 10 minutes after removing drops, then brushing 10 times. |
Applications and Ratings:
| Part Designation | Power Rating @ 70C | Dielectric Withstanding Voltage | Resistance Range () | T.C.R. (x10/K) | Operating Temp. Range | Rated Ambient Temp. | Maximum Overload Voltage | Maximum Working Voltage |
|---|---|---|---|---|---|---|---|---|
| PCF1/2 | 0.5W | 200V | 4.7 - 100K | -500 ~ -1300: 3.3R<10 -600 ~ -1500: 10R<100 -700 ~ -1800: 100R<1k -900 ~ -1900: 1kR<100k -900 ~ -2000: 100kR<200k -900 ~ -2200: 200kR390k | -40C to +200C | +70C | 10kV: 4.7R<10k 10kV: 10kR<33k 10kV: 33kR<100k | 400V |
| PCF1 | 1.0W | 300V | 3.3 - 330K | -600 ~ -1500: 10R<100 -700 ~ -1800: 100R<1k -900 ~ -1900: 1kR<100k -900 ~ -2000: 100kR<200k -900 ~ -2200: 200kR390k | -40C to +200C | +70C | 14kV: 3.3R<30k 14kV: 30kR<390k | 600V |
| PCF2 | 2.0W | 400V | 4.7 - 100K | -700 ~ -1800: 100R<1k -900 ~ -1900: 1kR<100k -900 ~ -2000: 100kR<200k -900 ~ -2200: 200kR390k | -40C to +200C | +70C | 20kV: 3.3R<10k 20kV: 10kR<390k | 800V |
For resistors operated at an ambient temperature of 70C or above, a power rating shall be derated in accordance with the derating curve. Rated Voltage = Power Rating x Resistance Value or Maximum Working Voltage, whichever is lower.
Performance Requirements:
| Type | Resistance to pulse R (% + 0.05) | Protection resistor DC (Max. pulse voltage) | SW C=1.000pF 1 sec ON 1 sec OFF |
|---|---|---|---|
| PCF1/2 | 5, 10, 5 | 10kV: 4.7R<10k 10kV: 10kR<33k 10kV: 33kR<100k 4kV: 10kR<100k | Rx (In insulation oil) |
| PCF1 | 5, 10, 5 | 14kV: 3.3R<30k 14kV: 30kR<390k 7kV: 30kR<390k | Rx (In insulation oil) |
| PCF2 | 5, 10, 5 | 20kV: 3.3R<10k 20kV: 10kR<390k 11kV: 10kR<390k | Rx (In insulation oil) |
The resistor mounted to the test circuit as below is applied with high voltage impulse 10,000 cycles.
2411220016_KOA-PCF2CT631R681K_C20097627.pdf
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