

UltraMOVTM 25S Varistor Series - High Peak Surge Current Radial Lead Varistor
The UltraMOVTM 25S Varistor Series is designed for applications requiring high peak surge current ratings and high energy absorption capability. UltraMOVTM varistors are primarily intended for use in AC Line Voltage applications or other products that require voltage clamping of high transient surge currents from sources.
These devices have 25mm square forms are produced in a radial lead package and offered with straight leads. UltraMOVs are manufactured with recognized epoxy encapsulation and are rated for ambient temperatures up to 85℃ with no derating. This 25S Series is LASER-branded and is supplied in bulk packaging.
The UltraMOVTM 25S Varistor Series is designed for applications requiring high peak surge current ratings and high energy absorption capability. UltraMOVTM varistors are primarily intended for use in AC Line Voltage applications or other products that require voltage clamping of high transient surge currents from sources.
These devices have 25mm square forms are produced in a radial lead package and offered with straight leads. UltraMOVs are manufactured with recognized epoxy encapsulation and are rated for ambient temperatures up to 85℃ with no derating. This 25S Series is LASER-branded and is supplied in bulk packaging.
- Lead-free and RoHS compliant
- High peak surge current rating (ITM) 22kA, single 8/20μs pulse, (25mm)
- 40kA rating when 2 devices paralleled (VN(DC) matched within +/- 5%
- Standard operating voltage range compatible with common AC line voltages (115 to 750 VAC)
- Characterized for maximum standby current (Leakage)
- Custom voltage types available
- Standard lead form and lead space options
UltraMOV25S Parts
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Showing 1 to 12 of 18 Total Results
Part Number | Actions | VMAX AC (V) | VMAX DC (V) | Surge Energy (WTM) (J) | ITM 1xAmps (A) | VNDC MIN (V) | VNDC MAX (V) | Vc (V) | Polarity | Co Typ (pF) | Agency Approvals |
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Part Number | Actions | VMAX AC (V) | VMAX DC (V) | Surge Energy (WTM) (J) | ITM 1xAmps (A) | VNDC MIN (V) | VNDC MAX (V) | Vc (V) | Polarity | Co Typ (pF) | Agency Approvals | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
115 | 150 | 230 | 22000 | 162 | 198 | 295 | Bi-directional | 4500 | cURus / CSA / IECEX / iecex / TUV / VDER / CRU | |||
130 | 170 | 255 | 22000 | 184 | 226 | 335 | Bi-directional | 3900 | cURus / CSA / IECEX / iecex / TUV / CRU / VDER | |||
140 | 180 | 285 | 22000 | 200 | 240 | 355 | Bi-directional | 3500 | cURus / IECEX / TUV / CSA / iecex / VDER / CRU | |||
150 | 200 | 300 | 22000 | 216 | 264 | 390 | Bi-directional | 3200 | cURus / CSA / IECEX / TUV / VDER / iecex / CRU | |||
175 | 225 | 315 | 22000 | 243 | 297 | 450 | Bi-directional | 2550 | cURus / CSA / IECEX / VDER / iecex / CRU / TUV | |||
230 | 300 | 400 | 22000 | 324 | 396 | 585 | Bi-directional | 1900 | cURus / iecex / TUV / CSA / IECEX / CRU / VDER | |||
250 | 320 | 435 | 22000 | 351 | 429 | 640 | Bi-directional | 1750 | cURus / CSA / IECEX / iecex / VDER / TUV / CRU | |||
275 | 350 | 470 | 22000 | 387 | 473 | 700 | Bi-directional | 1610 | cURus / CSA / IECEX / iecex / VDER / CRU / TUV | |||
300 | 385 | 500 | 22000 | 423 | 517 | 765 | Bi-directional | 1450 | cURus / CSA / IECEX / iecex / TUV / VDER / CRU | |||
320 | 420 | 540 | 22000 | 459 | 561 | 825 | Bi-directional | 1350 | cURus / CSA / IECEX / VDER / iecex / CRU / TUV | |||
385 | 505 | 630 | 22000 | 558 | 682 | 1010 | Bi-directional | 1080 | cURus / CSA / iecex / VDER / CRU / TUV / IECEX | |||
420 | 560 | 655 | 22000 | 612 | 748 | 1100 | Bi-directional | 1000 | cURus / CSA / IECEX / iecex / TUV / VDER / CRU |
UltraMOV25S Applications
- Surge Protective Devices (SPD)
- Uninterruptable Power Supplies (UPS)
- AC Power Taps and Meters
- Lightning
- Inductive Load and Capacitor Bank Switching
Series: UltraMOV25S Resources

Varistors Catalog
Learn about Littelfuse varistors and how to choose the best form of overvoltage protection for your application.

Circuit Protection Selection Guide
Consult this guide to learn about circuit protection considerations and the solutions Littelfuse offers. Tables help match products with applications.
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