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
- Series: RTA
- Compliance: Lead-free, Halogen-free, RoHS
Technical Specifications
| Type | Rated Power (W) | Max. Rated Voltage (V) | Max. Overload Voltage (V) | T.C.R (ppm/) | Resistance Range () | Number of Terminals | Number of Resistors | Rated Current (JUMPER 0) | Max. Resistance (JUMPER 0) |
|---|---|---|---|---|---|---|---|---|---|
| RTA02-2D (0402) | 1 | 25 | 50 | 300 | 1R<10 (D:0.5%) 10R10M (D:0.5%) 1R<10 (F:1%) 10R10M (F:1%) 1R<10 (J:5%) 10R10M (J:5%) | 4 | 2 | 1A | 25m MAX. (D) 50m MAX. (F, J) |
| RTA02-4D (0402) | 1 | 25 | 50 | 300 | 1R<10 (D:0.5%) 10R10M (D:0.5%) 1R<10 (F:1%) 10R10M (F:1%) 1R<10 (J:5%) 10R10M (J:5%) | 8 | 4 | 1A | 25m MAX. (D) 50m MAX. (F, J) |
| RTA02-8D (0402) | 1 | 25 | 50 | 250 | 10R10M (D:0.5%) 1R10M (D:0.5%) 10R10M (F:1%) 1R10M (J:5%) | 16 | 8 | 1A | -- (D) 50m MAX. (F, J) |
| RTA03-2D (0603) | 1 | 50 | 100 | 200 | 10R10M (D:0.5%) 1R10M (D:0.5%) 10R10M (F:1%) 1R10M (J:5%) | 4 | 2 | 1A | -- (D) 50m MAX. (F, J) |
| RTA03-4D (0603) | 1 | 50 | 100 | 200 | 22R470K (D:0.5%) 1R10M (D:0.5%) 1R10M (F:1%) 1R10M (J:5%) | 8 | 4 | 1A | 25m MAX. (D) 50m MAX. (F, J) |
| RTA02-2C (0402) | 1 | 25 | 50 | 650 | 3R10 (D:0.5%) 10R<1M (D:0.5%) 3R<10 (F:1%) 10R1M (F:1%) 3R<10 (J:5%) 10R1M (J:5%) | 4 | 2 | 1A | -- (D) 50m MAX. (F, J) |
| RTA02-4C (0402) | 1 | 25 | 50 | 400 | 1R<10 (D:0.5%) 10R1M (D:0.5%) 1R<10 (F:1%) 10R1M (F:1%) 1R<10 (J:5%) 10R1M (J:5%) | 8 | 4 | 1A | -- (D) 50m MAX. (F, J) |
Operating Temperature Range: -55 ~ +155
Power Derating Curve: Power can be adjusted according to the curve when ambient temperature exceeds 70 to 155.
Rated Voltage or Rated Current Calculation:
- For resistance values (1): E=(RP), where E is rated voltage, R is nominal resistance, P is rated power. If calculated value exceeds max rated voltage, use max rated voltage.
- For JUMPER (0): I=(P/R), where I is rated current, P is rated power, R is nominal resistance. If calculated value exceeds max rated current, use max rated current.
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:Top inner electrode, 4:Resistive layer, 5:1st Protective coating, 6:Bottom inner electrode, 7:Marking, 8:Terminal inner electrode, 9:Ni plating, 10:Sn plating
C(Concave) Type: 1:Ceramic substrate, 2:2nd Protective coating, 3:Top inner electrode, 4:Resistive layer, 5:1st Protective coating, 6:Bottom inner electrode, 7:Marking, 8:Terminal inner electrode, 9:Ni plating, 10:Sn plating
Reliability Test Items
Electrical Performance Test
| Item | Conditions | Specifications |
|---|---|---|
| Temperature Coefficient of Resistance | TCR=(R2-R1)/R1(T2-T1)10 R1:Room temp resistance, R2:-55 or +125 resistance, T1:Room temp, T2:-55 or +125. Per JIS-C5201-1 4.8 | NA |
| Short Time Overload | Apply 2.5x rated voltage for 5 sec, rest 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 coating/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 | 2.5x rated voltage, 1 sec ON, 25 sec OFF, 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 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 bath for 20.5 sec. Per JIS-C5201-1 4.17 | Solder coverage >95%. |
| Resistance to Soldering Heat | Test 1: Immerse in 260+5/-0 solder bath for 10 sec+1/-0, rest 60 min. Test 2: Immerse in 260+5/-0 solder bath for 30 sec+1/-0, then wash. Per JIS-C5201-1 4.18 | Test 1: R%=1.0%. Test 2: Solder coverage >95%, no lower layer material visible at electrode edge. |
| Joint Strength of Solder | Bending test: Apply 5mm downward force at center of test board. Per JIS-C5201-1 4.33 | R%=1.0% |
Environmental Test
| Item | Conditions | Specifications |
|---|---|---|
| Resistance to Dry Heat | 1555 oven for 10004 hrs. Per JIS-C5201-1 4.25 | 0.5%, 1%: R=1.0%; 5%: R=2.0% |
| Thermal Shock | -55 for 15 min, +125 for 15 min, 300 cycles. Per MIL-STD 202 Method 107 | R=1.0% |
| Loading Life in Moisture | 402, 90~95% RH, rated voltage applied, 90 min ON, 30 min OFF, 1,000 hrs. Per JIS-C5201-1 4.24 | 0.5%, 1%: R=2.0%; 5%: R=3.0% |
| Load Life | 702 oven, rated voltage applied, 90 min ON, 30 min OFF, 1,000 hrs. 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)
Technical Application Notes (Recommendations)
- Recommended Soldering Conditions:
- Lead Free IR-Reflow Soldering Profile (Complies with J-STD-020): Max component temperature 260+5/-0, 10 seconds.
- Soldering Iron Method: 35010 within 3 seconds.
- Recommended Land Pattern Design (For Reflow Soldering): Resistance value may vary based on solder area and amount. Consider resistance decrease or increase during circuit design.
- Usage Environment Precautions: This product is for general electronic use. RALEC is not responsible for damages or losses due to use in special environments. Confirm applicability with RALEC for special environments like high temperature/humidity, corrosive gases (Cl2, H2S, NH3, SO2, NO2), unverified liquids, sealing with unverified resins, or cleaning with water-soluble detergents.
- Transient Overload Precautions: Transient overloads can cause loss of function. Prevent transient currents exceeding product specifications during manufacturing and storage.
- Handling and Processing Precautions: Avoid mechanical stress on resistor edges and protective coating. Handle PCBs carefully to prevent bending stress on resistors. Operate within rated power limits; exceeding limits can cause damage due to temperature rise. Set operating environment if resistors will be subjected to large load (pulse) impacts. Evaluate and confirm in your actual application, ensuring fail-safe design for system safety.
Storage and Handling Conditions
- Storage: 255, 6015% RH for two years.
- Avoid: Direct sunlight, condensation, corrosive environments (sea breeze, Cl2, H2S, NH3, SO2, NO2).
- 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 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 incompleteness in product information. RALEC may change information without notice. RALEC makes no commitment or warranty regarding product suitability for special purposes or continued production. To the maximum extent permitted by law, RALEC disclaims all liability for application or use of its products, including profit loss, direct, indirect, special, punitive, consequential, or incidental damages, and all implied warranties (fitness for a particular purpose, non-infringement, merchantability). This product is defined for general electronic use and is not suitable for automotive electronics, medical life-support/sustaining devices, 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. The buyer assumes all risks for using such advice and for combining RALEC products with other materials or implementing them in any process. RALEC reserves the right to modify this information without notice; product changes will be announced via ECN.
2411221110_RALEC-RTA03-4D473JTP_C102673.pdf
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