“万和”牌自恢复保险丝（WHPTC、WHSMD）可以对各类电动玩具提供电池、电机、控制板的过流保护或者堵转保护，选择专业就等于选择安全，选择WH牌，享受优质电路保护解决方案。
PTC可有效的应用在玩具电池、锂电池中，热敏电阻与电池串联可有效的对过流，过热进行快速响应，对其保护，选择专业的WH6系列、WH16系列、WH30系列、WHSMD自恢复保险丝，我们只生产最安全的保险丝。
详情请咨询全国24小时服务热线：400-0503-668。
| 符号Sign | 说明 | Definition |
| Ih |
WHPTC在25℃环境温度下的最大 工作电流 |
Hold current-maximum current at which the device will not trip at 25℃ |
| It | WHPTC在25℃环境温度下启动保护的最小电流 | Trip current-minimum current at which the device will always trip at 25℃ |
| Vmax | WHPTC的最大工作电压 | Maximum voltage at which the device will not trip |
| Vmaxi | WHPTC在阻断状态下所承受的最大电压 | Maximum voltage device can withstand without damage at it rated current |
| Imax | WHPTC能承受的最大电流 | Maximum fault current device can withstand without damage at rated voltage |
| Rmin | WHPTC工作前的初始最小阻值 | Minimum device resistance at 25℃ prior to tripping |
| Rmax | WHPTC工作前的初始最大阻值 | Maximum device resistance at 25℃ prior to tripping |
| Figure | 图示 | The Figure of WHPTC |
| Lead | 导线尺寸 | Lead diameter |
| WH Series | -20℃ | 0℃ | 25℃ | 30℃ | 40℃ | 50℃ | 60℃ | 70℃ | 85℃ |
| WH6 | 130% | 115% | 100% | 91% | 83% | 77% | 68% | 61% | 52% |
| WH16 | 132% | 120% | 100% | 96% | 88% | 80% | 71% | 61% | 47% |
| WH30 | 130% | 115% | 100% | 91% | 83% | 77% | 68% | 61% | 52% |
| WH60 | 136% | 119% | 100% | 90% | 81% | 72% | 63% | 54% | 40% |
| WH130 | 136% | 119% | 100% | 92% | 81% | 72% | 63% | 54% | 40% |
| WH250 | 132% | 117% | 100% | 91% | 85% | 77% | 68% | 61% | 48% |
| WH600 | 138% | 119% | 100% | 92% | 83% | 73% | 64% | 55% | 42% |
