TDK Standard Metal Oxide Varistor, 250V AC, 38J
TDK 250V AC metal oxide varistor with 38J energy rating. UL94V-0 epoxy coated, for industrial surge protection. Approved to UL, CSA, VDE, IEC.
The TDK Standard Metal Oxide Leaded Varistor is a robust electronic component designed to provide reliable over-voltage protection in a wide range of applications. Housed in a flame-retardant UL94V-0 epoxy resin coating, it offers excellent safety and durability. This varistor maintains its full performance rating without derating in ambient temperatures up to 85°C, ensuring stable operation in demanding environments.
It features a round varistor element and is backed by a comprehensive suite of international approvals, including UL, CSA, VDE, CQC, and IEC, making it suitable for global markets and regulated industries. The component is engineered for endurance, capable of operating for 1000 hours at 85°C under specified test conditions.
With a nominal AC voltage rating of 250V and a DC rating of 320V, it effectively clamps transient voltages, with a maximum clamping voltage (Vc) of 650V. It can handle significant surge currents, with a peak rating of 2.5kA for an 8/20µs waveform, and absorbs energy pulses up to 38 joules (10/1000µs). Its compact disc form factor measures 10mm in diameter.
Key Specifications & Features
- Voltage Protection: Rated for 250V AC / 320V DC systems.
- High Energy Absorption: Capable of dissipating surge energy up to 38J.
- Robust Construction: Metal Oxide Varistor (MOV) technology with a flame-retardant epoxy coating.
- Wide Temperature Range: Operates reliably from -40°C to +85°C.
- International Compliance: Approved to UL, CSA, VDE, CQC, and IEC standards.
- Tight Tolerances: Available with ±10% or ±5% varistor voltage tolerance for precision circuits.
This component is an essential safeguard for electronic equipment, diverting dangerous voltage spikes away from sensitive circuitry to prevent damage.
- Industrial power supply protection
- Safety-critical electronic systems
- AC line voltage surge suppression
- DC circuit over-voltage protection
- Voltage Rating (VAC): 250V
- Voltage Rating (VDC): 320V
- Clamping Voltage (Vc) Max: 650V
- Peak Surge Current (8/20µs): 2.5kA
- Peak Energy (10/1000µs): 38J
- Case Style: Disc, 10mm
- Coating: UL94V-0 Flame-Retardant Epoxy Resin
- Operating Temperature Range: -40°C to 85°C
- Endurance: 1000h at 85°C
- Voltage Tolerance: ±10% and ±5% options
- Approvals: UL, CSA, VDE, CQC (S05/07, S10/S14, S20), IEC
- Product Range: Standard series
- Weight: 2 grams
- Dimensions: 33mm (W) x 43mm (H) x 15mm (D)
- Varistor Case Style: Disc 10mm
- Varistor Type: Metal Oxide Varistor (MOV)
- Operating Temperature Min: -40°C
- Operating Temperature Max: 85°C
- Peak Energy (10/1000uS): 38J
- SVHC: No SVHC (25-Jun-2025)
Always follow local regulations and product guidance.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
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