TDK EPCOS Code B59154U1135B140 Alternative
PTC Thermistor for Telecom Overload Proection,
Leaded Disk Coated 650V 50 Ohm 3A
PTC Thermistor for Telecom Overload Proection,
Leaded Disk Coated 650V 50 Ohm 3A
AMWEI Ordering Code: AMZ23-50RM075
Appearance and Dimension
Telecom PTC Leaded Disk Coated Appearance Engineering Drawing
- Silicon resin coated ceramic body, grey color
- Coated ceramic body outer diameter D : 9.5mm max.
- Coated ceramic body thickness T: 5.5mm max.
- Pin wire diameter d: 0.6mm
Application
Overcurrent overload protection for telecom applications
Suitable for line card applications e.g. POTS, access networks,
customer premises equipment (CPE) or integrated voice data (IVD)
Features
Compliant with ITU-T standards
- basic-level lightning surges (10/700 µs)
- basic-level power induction (600 V, 1 A, 0.2 s)
- power contact criteria A/B (230 V, 15 min.)
Matching available with narrow resistance tolerance.
Tight resistance matching maintained after switching.
Negligible resistance drift after soldering or switching.
Electrical Specifications
- Resistance @25C R25 : 50Ω,
- Standard R25 tolerance +/- 20%, tight tolerance +/- 15% can be supplied upon request.
- R25 resistance matching per packing unit can be supplied upon request.
- Rated voltage (RMS) : 230 V
- Maximum operating voltage Vmax: 650 V
- Maximum permissible repetitive turn over current Imax: 3 A
- Non-trip Current at +25C : 75 mA
- Non-trip Current at +40C: 60 mA
- PTC Thermistor Trip Current, Operating Current at +25℃ It : 150 mA
- Tripping time at +25C:
1A→ 0.5A: 0.35~0.65 seconds.
0.5A→0.15A, 3 seconds
0.35A→0.15, 6 seconds - Tripping time at max. current 3A: <0.2 seconds,
- Operating ambient temperature range (V=0): -40~+125C
- Operating ambient temperature range (V=230V) : 0~60C
Reliability Data
| Test Item | Standard | Test conditions | |ΔR25/R25| |
|---|---|---|---|
| Electrical endurance, cycling |
IEC 60738-1 | Room temperature, 3A; 230V Number of cycles: 10 |
<20% |
| Electrical endurance, constant |
IEC 60738-1 | storage at Voltage: 230V Ambient temperature: +60C Test duration: 1000 h |
<25% |
| Damp heat | IEC 60738-1 | Temperature of air: 40℃, Relative humidity of air: 93%, Duration: 56 days Test according to IEC 60068-2-78 |
<10% |
| Lead wire tensile | IEC60068-2-21 | Test Ua: pull strength 10N, 10 seconds, Test Ub: bending 90°, pull strength 5N, successively twice. Test Uc: revolving 180°, successively twice. |
<20% |
| Rapid change of temperature |
IEC 60738-1 | T1 = Top,min (0 V), T2 = Top,max (0 V) Number of cycles: 5 Test duration: 30 min Test according to IEC 60068-2-14, test Na |
<10% |
| Climatic sequence | IEC 60738-1 | Dry heat: T = Top,max (0 V) Test duration: 16 h Damp heat first cycle Cold: T = Top,min (0 V) Test duration: 2 h Damp heat 5 cycles Tests performed according to IEC 60068-2-30 |
<10% |
ITU Performance
| Test Item | Condition | Test Method | Performance Requirement |
|---|---|---|---|
| Over Current Withstanding | 220V/3A, 20 cycles |
Max. voltage of supply: 220VAC, Initial current: 3A. ON 60S, OFF 600S , Cycle:20 times, |
No damage, 4 hours after the conditioning then re-test Rn. Zero power resistance at 25℃ ΔR/Rn≤20%. |
| Lightning Surge Current Withstanding | 10/1000μs, 30 cycles |
Duration: 30 times, Temperature: 25℃ Short circuit current wave:10/1000μs, Minimum open voltage: 4 KV Short circuit current peak value: 25A Interval time: 3min |
No damage, 4 hours after the conditioning then re-test Rn. Zero power resistance at 25℃ ΔR/Rn≤20%. |
| Power Line Contact (Over Voltage Withstanding) |
250V/3A, 15 minutes |
Duration: 1 cycle Ambient Temperature: 25 ± 2 ℃ Voltage: 250 Vrms Frequency: 50Hz Current: 3A, 15 minutes On |
No damage, 4 hours after the conditioning then re-test Rn. Zero power resistance at 25℃ ΔR/Rn≤20%. |
| Induction Voltage Withstanding |
650V/1.1A, 20 cycles |
Duration: 20 cycles Voltage: 650Vdc Temperature: 25℃ Current: 1.1A Cycle: 1 sec ON/60sec. OFF |
No damage, 4 hours after the conditioning then re-test Rn. Zero power resistance at 25℃ ΔR/Rn≤20%. |
| Fail Model | 650V/10A, 30 minutes |
Voltage of power supply: 650VAC. Initial current: 10Arms. Energized time: 30min. |
High resistance or open circuit is allowable. Low resistance state or firing is not allowed |
Packaging Information
Loose bulk in plastic package.