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Specifications
Resistance:
6.8Ω
Power(Watts):
20W
Type:
Wirewound Resistor
Tolerance:
±5%
Temperature Coefficient:
±400ppm/℃
Mfr. Part #:
WPRT20AB-6R8JB270
Package:
Through Hole
Key Attributes
Model Number:
WPRT20AB-6R8JB270
Product Description
Wirewound Power Radial Terminal Resistor - WPRT Series
The WPRT Series resistors are wirewound power resistors designed for various applications requiring high overload capability and reliability. Available in wattages from 10 to 50 watts, they feature quick connect or soldered tag terminals, with optional mounting brackets for enhanced installation flexibility. These resistors are AEC-Q200 qualified, RoHS compliant, and feature a flameproof case, making them suitable for demanding environments.
Product Attributes
- Brand: TT Electronics
- Origin: BI Technologies, IRC, Welwyn
- Material: Ceramic rod (Al2O3), tin plated steel terminals, steel brackets
- Certifications: AEC-Q200 qualified, RoHS compliant (EU Directive 2011/65/EU amended by (EU) 2015/863)
Technical Specifications
| Model | Power Rating (25C) (W) | Power Rating (70C) (W) | 5s Overload Rating (25C) (W) | Resistance Range (Ohms) | Thermal Impedance (C/W) | Isolation Voltage (V) | TCR (ppm/C) | Resistance Tolerance (%) | Ambient Temperature Range (C) | L (mm) | W (mm) | D (mm) | P (mm) | J (mm) | K (mm) | F (mm) | G (mm) | E (mm) | M1 (mm) | M2 (mm) | H (mm) | N (mm) | S (mm) | R (mm) | Weight (nom.) (g) |
| WPRT10 | 10 | 10 | 50 | 1R0 - 820R | 18 | 2000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 48 | 10 | 9.01.0 | 32 | 4.1 | 3.0 | 8.7 | 5.0 | 12 | 4.2 | 4.2 | 19 | 23 | 60 | 72 | 11 |
| WPRT15 | 15 | 12.3 | 75 | 1R0 1K0 | 14 | 3000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 48 | 12.5 | 11.51.0 | 32 | 4.1 | 3.0 | 8.0 | 6.0 | 12 | 4.2 | 4.2 | 23.5 | 23 | 60 | 72 | 18 |
| WPRT20 | 20 | 16.4 | 100 | 2R0 1K2 | 12 | 4000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 63 | 12.5 | 13.51.0 | 44 | 4.1 | 3.0 | 10.0 | 6.0 | 12 | 4.2 | 4.2 | 25 | 23 | 74 | 86.5 | 27 |
| WPRT30 | 30 | 24.6 | 150 | 3R0 1K5 | 8.5 | 4000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 75 | 19 | 191.0 | 54 | 6.0 | 4.0 | 9.5 | 7.5 | 18 | 4.2 | 4.2 | 30 | 39 | 88 | 105 | 66 |
| WPRT40 | 40 | 32.8 | 200 | 6R0 1K5 | 7 | 4000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 90 | 19 | 190.6 | 70 | 6.0 | 4.0 | 9.5 | 7.5 | 18 | 5.2 | 4.5 | 30 | 39 | 104 | 122 | 81 |
| WPRT50 | 50 | 41 | 250 | 6R0 1K5 | 7 | 4000 | <20R: 400, 20R: 350 | 5 | -55 to +155 | 90 | 19 | 190.6 | 70 | 6.0 | 4.0 | 9.5 | 7.5 | 18 | 5.2 | 4.5 | 30 | 39 | 104 | 122 | 81 |
Performance Data
| Parameter | Specification |
| Maximum Load (1000hrs at 25C) | R% 5 |
| Derating from rated power | Zero at 275C |
| Short term overload (5 x rated power) | R% 5 +0.05 |
| Damp heat steady state (56 days, 40C, 90% RH) | R% 5 +0.05 |
| Temperature rapid change (5 cycles -55C to +155C) | R% 2 +0.05 |
| Resistance to solder heat | R% 1 +0.05 |
| Voltage Proof (1kV for 60s) | No flashover, mechanical damage, arcing or breakdown |
| Solderability | Min. 95% coverage |
| Flammability | Resistor will not burn under any condition of applied temperature or overload. |
| Solvent resistance | Body protection and marking are resistant to all normal industrial solvents suitable for printed circuits. |
2412061725_TT-Electronics-WPRT20AB-6R8JB270_C6025999.pdf
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