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 various 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 (D:0.5%), 10R10M (D:0.5%, F:1%, J:5%) | 4 | 2 | 1A | 25m MAX. |
| RTA02-4D (0402) | 1 W | 25V | 50V | 300 (1R<10), 200 (10R10M) | 1R<10 (D:0.5%), 10R10M (D:0.5%, F:1%, J:5%) | 8 | 4 | 1A | 25m MAX. |
| RTA02-8D (0402) | 1 W | 25V | 50V | 250 (10R10M) | 10R10M (D:0.5%, F:1%, J:5%) | 16 | 8 | 1A | 50m MAX. |
| RTA03-2D (0603) | 1 W | 50V | 100V | 200 (10R10M) | 10R10M (D:0.5%, F:1%, J:5%) | 4 | 2 | 1A | 50m MAX. |
| RTA03-4D (0603) | 1 W | 50V | 100V | 200 (22R470K), 200 (1R10M) | 22R470K (F:1%), 1R10M (D:0.5%, F:1%, J:5%) | 8 | 4 | 1A | 25m MAX |
| RTA02-2C (0402) | 1 W | 25V | 50V | 650 (3R10), 200 (10R<1M) | 3R10 (D:0.5%), 10R<1M (D:0.5%, J:5%) | 4 | 2 | 1A | 50m MAX. |
| RTA02-4C (0402) | 1 W | 25V | 50V | 400 (1R<10), 200 (10R1M) | 1R<10 (D:0.5%), 10R1M (D:0.5%, J:5%) | 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
Refer to the provided diagrams for D (Convex) Type and C (Concave) Type structures.
Reliability Test Items
Electrical Performance Test
| Item | Conditions | Specifications |
|---|---|---|
| Temperature Coefficient of Resistance | Based on JIS-C5201-1 4.8 | NA |
| Short Time Overload | 2.5x rated voltage for 5 sec, rest 30 min. Based on JIS-C5201-1 4.13 | 0.5%, 1%: R=1.0%; 5%: R=2.0% |
| Insulation Resistance Test | 100 VDC for 1 min. Based on JIS-C5201-1 4.6 | 109 |
| Dielectric Withstand Voltage | 300 VAC for 1 min. Based on JIS-C5201-1 4.7 | No short circuit or burn |
| Intermittent Overload | 2.5x rated voltage, 1 sec ON, 25 sec OFF, 10,000 cycles. Based on JIS-C5201-1 4.13 | R=5.0% |
Mechanical Performance Test
| Item | Conditions | Specifications |
|---|---|---|
| Resistance to Solvent | Immersed in Isopropyl alcohol (20~25) for 50.5 min, rest 48 hrs. Based on JIS-C5201-1 4.29 | R=0.5% |
| Solderability | Pre-treatment: 4 hrs at 105/100% RH/1.22105 pa. Test: Immersion in 2355 solder bath for 20.5 sec. Based on JIS-C5201-1 4.17 | Soldered area >95% |
| Resistance to Soldering Heat | Test 1: Immersion in 260+5/-0 solder bath for 10 sec+1/-0. Test 2: Immersion in 260+5/-0 solder bath for 30 sec+1/-0. Based on JIS-C5201-1 4.18 | Test 1: R%=1.0%. Test 2: Soldered area >95%, no underlayer visible at electrode edge. |
| Joint Strength of Solder | Bending test: 5mm deflection. Based on JIS-C5201-1 4.33 | R%=1.0% |
Environmental Test
| Item | Conditions | Specifications |
|---|---|---|
| Resistance to Dry Heat | 10004 hrs at 1555. Based on JIS-C5201-1 4.25 | 0.5%, 1%: R=1.0%; 5%: R=2.0% |
| Thermal Shock | 300 cycles (-55 for 15 min, +125 for 15 min). Based on MIL-STD 202 Method 107 | R=1.0% |
| Moisture Load Test | 1,000 hrs at 402, 90~95% RH, rated voltage (90 min ON, 30 min OFF). Based on JIS-C5201-1 4.24 | 0.5%, 1%: R=2.0%; 5%: R=3.0% |
| Load Life | 1,000 hrs at 702, rated voltage (90 min ON, 30 min OFF). Based on 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)
Technical Application Notes
Recommended Soldering Conditions:
- Lead Free IR-Reflow Soldering Profile (Compliant with J-STD-020): Max component temperature 260+5/-0 for 10 seconds.
- Soldering Iron Method: Within 3 seconds at 35010.
Recommended Land Pattern Design (For Reflow Soldering):
| Type | A | B | P | Q1 | Q2 |
|---|---|---|---|---|---|
| RTA02-2D | 0.50 | 2.00 | 0.67 | 0.33 | 0.34 |
| RTA02-4D | 0.50 | 2.00 | 0.50 | 0.28 | 0.22 |
| RTA02-8D | 1.00 | 2.60 | 0.50 | 0.25 | 0.25 |
| RTA03-2D | 1.00 | 2.60 | 0.80 | 0.40 | 0.40 |
| RTA03-4D | 1.00 | 2.60 | 0.80 | 0.40 | 0.40 |
| RTA02-2C | 0.50 | 2.00 | 0.50 | 0.28 | 0.22 |
| RTA02-4C | 0.50 | 2.00 | 0.50 | 0.28 | 0.22 |
Usage Environment Precautions: This product is for general electronic use. RALEC is not responsible for damages, costs, or losses incurred due to the use of this product in special environments. Confirmation with RALEC is required for other applications. For special environments (high temperature/humidity, corrosive gases like Cl2, H2S, NH3, SO2, NO2, unverified liquids, unverified sealing/coating materials), product characteristics and reliability must be individually approved. Cleaning after soldering is recommended, even with no-clean flux.
Transient Overload Precautions: Transient overloads can cause product malfunction. Ensure manufacturing and storage processes prevent transient currents exceeding product specifications.
Handling Precautions:
- Protect resistor edges and protective layers from mechanical stress.
- Handle PCBs carefully during separation or support fixation to avoid mechanical stress on resistors.
- Operate within rated power limits; exceeding them can cause damage due to temperature rise.
- For applications with high pulse load, set up the operating environment beforehand.
- Evaluate and confirm in your actual application, ensuring fail-safe design for system safety.
Storage and Handling Conditions
- Storage: 2 years under 255, 6015% RH.
- Avoid harsh environments: sea breeze, corrosive gases (Cl2, H2S, NH3, SO2, NO2), direct sunlight, condensation.
- Maintain correct box orientation during transport and storage. Avoid dropping or crushing boxes to prevent damage to electrodes or the body.
Labeling
Outer boxes for export to mainland China will be marked with the following labels: Electronic Information Product Pollution Control Mark, Packaging Recycling Mark.
Attachment
- Document Revision Record Table (QA-QR-027)
Legal Disclaimer
RALEC and its distributors/agents (collectively "RALEC") assume no liability for any errors, inaccuracies, or omissions in product information (specifications, data, images, charts). RALEC may change or improve product information without notice. RALEC makes no commitment, warranty, or guarantee regarding the suitability of its products for specific purposes or their continued production. To the maximum extent permitted by law, RALEC disclaims all liability for (i) application or use of RALEC products, (ii) lost profits, direct, indirect, special, punitive, consequential, or incidental damages arising from or related to RALEC products, and (iii) all implied warranties, including fitness for a particular purpose, non-infringement, and merchantability. 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 cause injury or death. Technical advice provided by RALEC is gratuitous; RALEC assumes no obligation or liability for its use or results. Buyer assumes all risks for adopting such advice. Buyer assumes all risks and liability for combining RALEC products with other materials or implementing them in any process, regardless of any oral or written technical descriptions, advice, or other information provided by RALEC. Information provided is for specification illustration only. RALEC reserves the right to modify content without notice. Product changes will be announced via ECN.
2411221110_RALEC-RTA02-2D390JTH_C881761.pdf
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