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 suitable for a wide range of general electronic uses.
Product Attributes
- Brand: RALEC
- Certifications: RoHS compliant, Lead-free, Halogen-free
Technical Specifications
| Type | Rated Power | Max. Rated Voltage | Max. Overload Voltage | T.C.R (ppm/) | Resistance Range | Number of Terminals | Number of Resistors | JUMPER (0) Rated Current | JUMPER (0) Resistance |
|---|---|---|---|---|---|---|---|---|---|
| RTA02-2D (0402) | 1 W | 25V | 50V | 300 (1R<10) 200 (10R10M) | 1R<10 10R10M | 4 | 2 | 1A | 25m MAX. |
| RTA02-4D (0402) | 1 W | 25V | 50V | 300 (1R<10) 200 (10R10M) | 1R<10 10R10M | 8 | 4 | 1A | 25m MAX. |
| RTA02-8D (0402) | 1 W | 25V | 50V | 250 (10R10M) | 10R10M | 16 | 8 | 1A | 50m MAX. |
| RTA03-2D (0603) | 1 W | 50V | 100V | 200 (10R10M) | 10R10M | 4 | 2 | 1A | 50m MAX. |
| RTA03-4D (0603) | 1 W | 50V | 100V | 200 (22R470K) 200 (1R10M) | 22R470K 1R10M | 8 | 4 | 1A | 25m MAX |
| RTA02-2C (0402) | 1 W | 25V | 50V | 650 (3R10) 200 (10R<1M) | 3R10 10R<1M | 4 | 2 | 1A | 50m MAX. |
| RTA02-4C (0402) | 1 W | 25V | 50V | 400 (1R<10) 200 (10R1M) | 1R<10 10R1M | 8 | 4 | 1A | 50m MAX. |
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 |
Structure Diagram
D (Convex) Type: 1. Ceramic substrate, 2. 2nd Protective coating, 3. Bottom inner electrode, 4. Top inner electrode, 5. Resistive layer, 6. 1st Protective coating, 7. Terminal inner electrode, 8. Ni plating, 9. Sn plating, 10. Marking.
C (Concave) Type: 1. Ceramic substrate, 2. 2nd Protective coating, 3. Bottom inner electrode, 4. Top inner electrode, 5. Resistive layer, 6. 1st Protective coating, 7. Terminal inner electrode, 8. Ni plating, 9. Sn plating, 10. Marking.
Reliability Test Items
Electrical Performance Test
| Item | Conditions | Specifications |
|---|---|---|
| Temperature Coefficient of Resistance | TCR = (R2-R1) / [R1(T2-T1)] 10 R1: Resistance at room temp. R2: Resistance at -55 or +125. T1: Room temp. T2: -55 or +125. Per JIS-C5201-1 4.8 | See Specification Table |
| Short Time Overload | Apply 2.5 times rated voltage for 5 sec, rest for 30 min. Per JIS-C5201-1 4.13 | 0.5%, 1%: R=1.0% 5%: R=2.0% |
| Insulation Resistance | Apply 100 VDC for 1 min between electrodes and protective layer/substrate. Per JIS-C5201-1 4.6 | 10 |
| Dielectric Withstand Voltage | Apply 300 VAC for 1 min between electrodes. Per JIS-C5201-1 4.7 | No short circuit or burn. |
| Intermittent Overload | 1 sec ON, 25 sec OFF at 2.5 times rated voltage for 10,000 cycles. Per JIS-C5201-1 4.13 | R=5.0% |
Mechanical Performance Test
| Item | Conditions | Specifications |
|---|---|---|
| Resistance to Solvent | Immerse in isopropyl alcohol at 20~25 for 50.5 min, rest for 48 hrs. Per JIS-C5201-1 4.29 | R=0.5% |
| Solderability | Pre-treatment: 4 hrs aging at 105, 100% RH, 1.2210 pa. Test: Immerse in 2355 solder for 20.5 sec. Per JIS-C5201-1 4.17 | Soldering area > 95%. |
| Resistance to Soldering Heat | Test 1: Immerse in 260+5/-0 solder for 10 sec+1/-0. Test 2: Immerse in 260+5/-0 solder for 30 sec+1/-0. Per JIS-C5201-1 4.18 | Test 1: R%=1.0% Test 2: Soldering area > 95%. No under-layer visible at electrode edge. |
| Joint Strength of Solder | Bending test: Apply load to center of test board. D=5mm. Per JIS-C5201-1 4.33 | R%=1.0% |
Environmental Test
| Item | Conditions | Specifications |
|---|---|---|
| Resistance to Dry Heat | 10004 hrs at 1555. Per JIS-C5201-1 4.25 | 0.5%, 1%: R=1.0% 5%: R=2.0% |
| Thermal Shock | 300 cycles: -55 (15 min) to +125 (15 min). Per MIL-STD 202 Method 107 | R=1.0% |
| Loading Life in Moisture | 1000 hrs: 90 min ON, 30 min OFF at 402, 90~95% RH, with rated voltage. Per JIS-C5201-1 4.24 | 0.5%, 1%: R=2.0% 5%: R=3.0% |
| Load Life | 1000 hrs: 90 min ON, 30 min OFF at 702, with rated voltage. Per JIS-C5201-1 4.25 | 0.5%, 1%: R=2.0% 5%: R=3.0% |
Plating Thickness
- Nickel layer (Ni): 2m
- Pure Tin layer (Sn): 3m (Matte tin)
Recommended Application Notes
- Soldering Conditions: Lead Free IR-Reflow Soldering Profile (J-STD-020 compliant, max temp 260+5/-0, 10 sec). Soldering iron: 35010 within 3 seconds.
- Land Pattern Design: Refer to diagrams for RTA02-2D, RTA02-2C/RTA03-2D, RTA02-4D/RTA02-4C, RTA03-4D, RTA02-8D.
- Usage Environment: For general electronic use. RALEC is not responsible for damages in special environments. Consult RALEC for applications in high temperature/humidity, corrosive atmospheres (Cl2, H2S, NH3, SO2, NO2), unverified liquids, or with unverified sealing/coating materials. Cleaning after soldering is recommended, even for no-clean flux.
- Transient Overload: Be aware of potential functional loss due to transient overload.
- Handling and Operation: Avoid mechanical stress on resistor edges and protective layers. Handle PCBs carefully to prevent bending-induced stress. Operate within rated power limits. Consider pulse load impacts and implement fail-safe designs.
Storage and Handling Conditions
- Storage: 2 years under 255, 6015% RH.
- Avoid: Sea breeze, corrosive gases (Cl2, H2S, NH3, SO2, NO2), direct sunlight, condensation.
- Handling: Maintain correct box orientation. Avoid dropping or crushing boxes to prevent damage to electrodes or body.
Marking
Outer boxes for export to mainland China will be marked with the Electronic Information Product Pollution Control Mark and the Packaging Recycling Mark.
Legal Disclaimer
RALEC and its distributors/agents (collectively "RALEC") disclaim liability for any errors, inaccuracies, or omissions in product information. RALEC may change product information without notice. RALEC makes no commitments or warranties regarding product suitability for specific purposes or continued production. RALEC is not liable for any application or use of its products, including but not limited to lost profits, direct, indirect, special, punitive, consequential, or incidental damages. All implied warranties, including fitness for a particular purpose, non-infringement, and merchantability, are disclaimed to the maximum extent permitted by law. This product is defined for general electronic use and is not suitable for automotive electronics, medical life-support or life-sustaining equipment, or any application where failure could result in injury or death. Technical advice from RALEC is provided free of charge and without obligation or liability. The buyer assumes all risks associated with the use of such advice and with the combination of RALEC products with other materials or processes. RALEC reserves the right to modify this information without notice. Product changes will be announced via ECN.
2411221110_RALEC-RTA02-4D200JTH_C458680.pdf
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