Fibre Core Conformal Coated Wirewound Resistor - SPP Series
The SPP Series Fibre Core Conformal Coated Wirewound Resistors are designed for applications requiring reliable performance and fusing capabilities. These resistors are UL1412 recognized and feature weldable and solderable leads, making them suitable for various assembly processes. They offer a wide resistance range and are available with high temperature coefficients upon request. The flameproof fusible nature is indicated by a blue band on the marking.
Product Attributes
- Brand: TT Electronics / BI Technologies / IRC / Welwyn
- Certifications: UL1412 recognised (UL number E234469), RoHS3 compliant (for Pb-free parts)
- Construction: Fibre Core, Conformal Coated, Wirewound
- Lead Type: Weldable and solderable
- Marking: Five colour bands (Value, Multiplier, Tolerance, Flameproof Fusible Blue Band)
Technical Specifications
| IRC Type | Resistance - Std. Range | Tolerance - Std. | Power Rating @ 85C | Max. Continuous Working Voltage | Min. Insulation Resistance | Min. Dielectric Withstanding Volts (RMS) | Temperature Coefcient |
|---|---|---|---|---|---|---|---|
| SPP-1 | 0.1 to 1200 | 5% (E24), 10% (E12) | 1W | PR | 10,000 Meg / 100 Meg | 600V | 600ppm/C (0.10 - 0.91) 300ppm/C (1 - 1200) |
| SPP-2 | 1 to 470 | 5% (E24), 10% (E12) | 2W | PR | 10,000 Meg / 100 Meg | 600V | 600ppm/C (0.10 - 0.91) 300ppm/C (1 - 2400) |
| SPP-3 | 1 to 470 | 5% (E24), 10% (E12) | 3W2 | 75V | 10,000 Meg / 100 Meg | 600V | 600ppm/C (0.10 - 0.91) 300ppm/C (1 - 2400) |
Environmental & Physical Data
| Characteristic | Maximum Limits | Test Method |
|---|---|---|
| Thermal Shock | 5% | EIA Specication RS-344 |
| Low Temperature Operation | 5% | EIA Specication RS-344 |
| Short Time Overload | 5% | EIA Specication RS-344 |
| Commercial Short Time Overload | 5% | EIA Specication RS-344 |
| Resistance to Solder Immersion | 3% | EIA Specication RS-344 |
| Solderability | 95% minimum coverage | EIA Specication RS-344 |
| Moisture Resistance | 5% | EIA Specication RS-344 |
| Life Test | 5% | EIA Specication RS-344 |
| Ambient Temperature Range | -65 to 160C | N/A |
| Load Life Stability | 10% (1W @ 85C), 10% (2W @ 85C), 10% (3W @ 85C) | N/A |
| Current Noise | Negligible | N/A |
Dimensions
| IRC Type | A (max.) | B (max.) | C (.002(0.05)) |
|---|---|---|---|
| SPP-1 | 0.400(10.2) | 0.148(3.8) | 0.032(0.8) |
| SPP-2 | 0.570(14.5) | 0.170(4.3) | 0.032(0.8) |
| SPP-3 | 0.570(14.5) | 0.170(4.3) | 0.032(0.8) |
Fusing Characteristics
Note: After fusing, the ohmic value is at least 100 times the initial value, provided initial power 25W (SPP1) or 40W (SPP2) is applied.
Pulse Energy Limit
| Value (ohms) | Energy (J) |
|---|---|
| SPP1 | 1.2/50us Peak Voltage Limit (10 pulses at 30s intervals, R <5%) |
| SPP2 | 1.2/50us Peak Voltage Limit (10 pulses at 30s intervals, R <5%) |
| 1 | 0 |
| 10 | 1 |
| 100 | 10 |
| 1000 | 100 |
| 10000 | 1000 |
Peak Voltage Limit
| Value (ohms) | Voltage kV |
|---|---|
| SPP1 | 1.2/50us Peak Voltage Limit (10 pulses at 30s intervals, R <5%) |
| SPP2 | 1.2/50us Peak Voltage Limit (10 pulses at 30s intervals, R <5%) |
| 1 | 0 |
| 10 | 1 |
| 100 | 10 |
| 1000 | 100 |
| 10000 | 1000 |
Packaging
Resistors are supplied taped and reeled. Standard packing is tape & reel, 4000/reel.
Taping Dimensions
| Type | a (max) | b | c |
|---|---|---|---|
| SPP-1, SPP-2, SPP-3 | 0.41 (10.4) | 2.0620.062 (52.41.6) | 0.20.015 (5.10.4) |
Ordering Procedure Example
SPP1UL4700JLF (SPP1, UL recognised, 470 ohms 5%, Pb-free)
| 1. Type | 2. UL Status | 3. Value | 4. Tolerance | 5. Packing & Termination Finish | 6. Custom Code |
|---|---|---|---|---|---|
| SPP1, SPP2, SPP3 | UL = UL recognised | 3 digits + multiplier | J = 5% K = 10% | LF = Pb-free Standard packing is tape & reel, 4000/reel | Optional |
| (SPP1 & SPP2 only, see Electrical Data for applicable values.) | R = ohms for values <100 ohms | Omit for SnPb |
2403271650_TT-Electronics-SPP2UL2200JLF_C19486006.pdf
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