RTA Series Thick Film Array Chip Resistors
The RTA series resistors are lead-free, halogen-free, and RoHS compliant thick film array chip resistors designed for general electronic applications. They offer reliable performance and are available in various configurations to meet diverse circuit needs.
Product Attributes
- Brand: RALEC
- Compliance: RoHS, Lead-free, Halogen-free
Technical Specifications
| Type | Rated Power | Max. Rated Voltage | Max. Overload Voltage | T.C.R (ppm/) | Resistance Range | Terminals | Resistors | JUMPER (0) Rated Current | JUMPER (0) Resistance |
| RTA02-2D (0402) | 1 W | 25V | 50V | 300 | 1R<10 | 4 | 2 | 1A | 25m MAX. |
| RTA02-4D (0402) | 1 W | 25V | 50V | 300 | 1R<10 | 8 | 4 | 1A | 25m MAX. |
| RTA02-8D (0402) | 1 W | 25V | 50V | 250 | 10R10M | 16 | 8 | 1A | -- |
| RTA03-2D (0603) | 1 W | 50V | 100V | 200 | 10R10M | 4 | 2 | 1A | -- |
| RTA03-4D (0603) | 1 W | 50V | 100V | 200 | 1R10M | 8 | 4 | 1A | 25m MAX |
| RTA02-2C (0402) | 1 W | 25V | 50V | 650 | 3R10 | 4 | 2 | 1A | -- |
| RTA02-4C (0402) | 1 W | 25V | 50V | 400 | 1R<10 | 8 | 4 | 1A | -- |
Dimensions (mm)
| Type | L | W | H | L1 | L2 | P | Q |
| RTA02-2D (0402) | 1.000.10 | 1.000.10 | 0.300.05 | 0.150.10 | 0.250.10 | (0.67) | 0.330.10 |
| RTA02-4D (0402) | 2.000.10 | 1.000.10 | 0.400.10 | 0.200.10 | 0.250.10 | (0.50) | 0.300.10 |
| RTA02-8D (0402) | 4.000.20 | 1.600.10 | 0.400.10 | 0.300.15 | 0.300.10 | (0.50) | 0.250.10 |
| RTA03-2D (0603) | 1.600.15 | 1.600.15 | 0.450.10 | 0.300.15 | 0.300.15 | (0.80) | 0.600.10 |
| RTA03-4D (0603) | 3.200.20 | 1.600.15 | 0.500.10 | 0.300.15 | 0.300.15 | (0.80) | 0.500.10 |
| RTA02-2C (0402) | 1.000.10 | 1.000.10 | 0.300.10 | 0.180.10 | 0.250.10 | (0.50) | 0.300.10 |
| RTA02-4C (0402) | 2.000.10 | 1.000.10 | 0.400.10 | 0.150.10 | 0.250.10 | (0.50) | 0.300.10 |
Reliability Test Items
| Item | Conditions | Specifications |
| Electrical Performance Test | ||
| Temperature Coefficient of Resistance | (R2-R1)/R1(T2-T1) 10 | Refer to Spec Table |
| Short Time Overload | Apply 2.5x rated voltage for 5 sec. | 0.5%, 1%: R=1.0%; 5%: R=2.0% |
| Insulation Resistance | Apply 100 VDC for 1 min. | 10 |
| Dielectric Withstand Voltage | Apply 300 VAC for 1 min. | No short circuit or burnout |
| Intermittent Overload | 2.5x rated voltage, 1 sec ON, 25 sec OFF, 10,000 cycles | R=5.0% |
| Mechanical Performance Test | ||
| Resistance to Solvent | Immerse in Isopropyl alcohol for 50.5 min. | R=0.5% |
| Solderability | Immerse in 2355 solder bath for 20.5 sec. | Soldered area >95% |
| Resistance to Soldering Heat | Test 1: Immerse in 260+5/-0 solder bath for 10 sec. Test 2: Immerse in 260+5/-0 solder bath for 30 sec. | Test 1: R%=1.0%. Test 2: Soldered area >95%, no lower material visible. |
| Joint Strength of Solder | Bending test: 5mm deflection | R%=1.0% |
| Environmental Test | ||
| Resistance to Dry Heat | 1555 for 10004 hr. | 0.5%, 1%: R=1.0%; 5%: R=2.0% |
| Thermal Shock | -55 for 15 min, +125 for 15 min, 300 cycles | R=1.0% |
| Loading Life in Moisture | 402, 90-95% RH, rated voltage, 90 min ON, 30 min OFF, 1,000 hr | 0.5%, 1%: R=2.0%; 5%: R=3.0% |
| Load Life | 702, rated voltage, 90 min ON, 30 min OFF, 1,000 hrs | 0.5%, 1%: R=2.0%; 5%: R=3.0% |
Plating Thickness
- Nickel Layer (Ni): 2m
- Pure Tin Layer (Tin): 3m (Matte Tin)
Application Notes
- Recommended Soldering Conditions: Lead Free IR-Reflow Soldering Profile (J-STD-020 compliant), maximum component temperature 260+5/-0 for 10 seconds. Soldering Iron: 35010 within 3 seconds.
- Land Pattern Design for Reflow Soldering is provided.
- Environmental considerations: Not recommended for use in high temperature/humidity, corrosive environments (sea breeze, Cl2, H2S, NH3, SO2, NO2), unverified liquids, or with unverified sealing/coating materials. Cleaning after soldering with water-soluble detergents is recommended.
- Transient Overload: Avoid transient currents exceeding product specifications.
- Handling and Operation: Protect edges and protective layers from mechanical stress. Avoid bending the PCB. Operate within rated power limits. Consider pulse load impacts. Evaluate and confirm in actual application for fail-safe design.
Storage and Handling Conditions
- Storage: 255, 6015% RH for two years. Avoid corrosive environments, direct sunlight, and condensation.
- Handling: Ensure correct box orientation. Do not drop or crush boxes to prevent damage to electrodes or body.
2411221110_RALEC-RTA03-4D242JTP_C2991294.pdf
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