Littelfuse Inc

TMOV25S / 34S Thermal Varistor

The Littelfuse varistor series for surge protection applications is now UL1449 3rd Edition recognized

Image of Littelfuse's TMOV25S/34S Thermal VaristorThe Littelfuse TMOV 25S and TMOV34S varistor series are specifically designed for applications that must meet the requirements of the limited current, abnormal overvoltage test in the UL1449 (3rd edition) surge protection device (SPD) standard. The TMOV 25S and TMOV 34S series meet the surge suppressor component recognition requirements of UL1449 for both cord-connected and permanently connected SPD end products in a single integrated package. A patented, thermally-responsive element within the body of the varistor will open the device in case of overheating, due to abnormal overvoltages.

The varistors offer high surge current ratings up to 20 kA for TMOV 25S and 40 kA for TMOV 34S. The thermally protected varistors consist of a 25 or 34 mm²-format varistor element (MOV) with an integral thermally activated element. This element is designed to open in the event of overheating due to abnormal overvoltage, limited current conditions. A number of devices include a "monitor" lead that may be connected to signaling circuitry to indicate if the MOV has been disconnected from the circuit. TMOV 34S series and TMOV 25S varistor series devices offer quick thermal response, due to the close proximity of the integrated thermal element to the MOV body. The integrated configuration also offers lower inductance than most discrete solutions, which helps ensure faster clamping response to overvoltage transients.

TMOV25S Thermal Varistor

图片制造商零件编号描述压敏电压（最小）压敏电压（典型）可供货数量价格查看详情
VARISTOR 430V 20KA SQUARE 25MMTMOV25SP275MVARISTOR 430V 20KA SQUARE 25MM387 V430 V1098 - 立即发货$50.22查看详情
VARISTOR 510V 20KA SQUARE 25MMTMOV25SP320MVARISTOR 510V 20KA SQUARE 25MM459 V510 V1478 - 立即发货$43.63查看详情
VARISTOR 180V 20KA SQUARE 25MMTMOV25SP115MVARISTOR 180V 20KA SQUARE 25MM162 V180 V1396 - 立即发货$30.28查看详情

TMOV34S Thermal Varistor

图片制造商零件编号描述压敏电压（最小）压敏电压（典型）可供货数量价格查看详情
VARISTOR 1.05KV 40KA SQUARE 34MMTMOV34S661EPVARISTOR 1.05KV 40KA SQUARE 34MM945 V1.05 kV180 - 立即发货$125.50查看详情
VARISTOR 680V 40KA SQUARE 34MMTMOV34S421EPVARISTOR 680V 40KA SQUARE 34MM612 V680 V170 - 立即发货$112.23查看详情
VARISTOR 430V 40KA SQUARE 34MMTMOV34S271MPVARISTOR 430V 40KA SQUARE 34MM387 V430 V340 - 立即发货$117.38查看详情
发布日期： 2012-11-16

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Related Product Training Modules

Thermally Protected MOVs - TMOVs An introduction to basic operation, electrical characteristics, product portfolio, features and benefits, and applications for TMOVs.
Varistor UL1449 3rd Edition Safety Agency Update Covers the 1449 3rd edition standard, key factors to consider if designing to the 3rd edition, and see Litteluse components that comply with the new standard.