TDK EPCOS Code B59154U1135B140 Alternative, PTC Thermistor for Telecom Overload Protection, 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.