V320SM7 LITTELFUSE Varistor (Diodes Moulded Non Polarised) In Stock
Littelfuse V320SM7 is a surface-mount varistor rated for up to 320 V RMS with 25 J energy absorption capacity, housed in a rectangular SMT package measuring 11.4 mm x 6 mm. It provides transient voltage suppression for AC line protection in industrial and consumer electronics equipment.
- Manufacturer
- LITTELFUSE
- Package
- Diodes Moulded Non Polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- V320SM7 Datasheet PDF
- Category
- Varistor
- Price
- From $0.8280(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 320 V RMS maximum circuit voltage rating provides robust surge protection for AC mains-powered equipment and industrial power lines
- 25 J energy absorbing capacity clamps high-energy transients such as lightning surges and switching spikes without failure
- Surface-mount rectangular package (11.4 mm x 6 mm, 6 mm height) enables automated SMT assembly on high-voltage power PCBs
- REACH-compliant and RoHS-compatible design meets global regulatory requirements for hazardous substance restrictions
Applications
The V320SM7 is used for AC mains transient voltage suppression in appliances, industrial motor drives, and HVAC control boards operating at 230 V or 120 V AC lines where surge protection up to 25 J is required. It is also applied in power supply input stages, lighting ballasts, and building automation controllers to protect sensitive electronics from voltage spikes caused by switching events or lightning. Its surface-mount form factor simplifies integration into dense power management PCBs replacing bulky leaded varistors.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 8.25 |
| Circuit RMS Voltage-Max | 320V |
| Energy Absorbing Capacity-Max | 25J |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 6mm |
| Package Length | 11.4mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 8.3mm |
| Packing Method | TR, 13 INCH |
| Rated Temperature | 85°C |
| Reference Standard | UL |
| Resistor Type | VARISTOR |
| Surface Mount | YES |
| Technology | METAL OXIDE |
| Terminal Finish | MATTE TIN |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | J BEND |
| Working Voltage | 420V |
| Package | Diodes Moulded Non Polarised |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.40.40.00 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for V320SM7:
suggested
suggested
Frequently Asked Questions
What is the maximum voltage rating and energy absorption of the Littelfuse V320SM7?
The V320SM7 is rated for a maximum RMS circuit voltage of 320 V and can absorb up to 25 joules of energy during a transient surge event. This combination makes it suitable for protecting 230 V AC mains-powered equipment from lightning-induced voltage spikes and electrical switching transients.
For which PCB assembly process is the V320SM7 optimized given its package style?
The V320SM7 is a surface-mount (SMT) device in a rectangular package measuring 11.4 mm in length and 6 mm in height, optimized for reflow soldering at standard lead-free peak temperatures of 260 degrees C. Its non-polarized design simplifies board placement and eliminates orientation errors in automated pick-and-place assembly.
How does the V320SM7 protect AC mains circuits from transient overvoltage events?
The V320SM7 is a metal oxide varistor (MOV) that exhibits a nonlinear voltage-current characteristic, clamping voltages above its rated 320 V RMS threshold within nanoseconds. During a surge event, it absorbs up to 25 joules of energy by shunting excess current, protecting downstream components from damage caused by transients exceeding several kilovolts peak.
Is the V320SM7 an alternative for standard leaded disc varistors in space-constrained power supply designs?
Yes. The V320SM7 replaces leaded disc varistors of equivalent rating with a compact SMT footprint of 11.4 mm by 6 mm, reducing PCB area by approximately 30 to 50 percent compared to equivalent through-hole MOV packages. Its surface-mount format also allows placement closer to the protected node, minimizing parasitic inductance in the transient suppression loop.
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About LITTELFUSE
LITTELFUSE is a leading electronic component manufacturer. FindMyChip sources LITTELFUSE ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8280 | $0.83 |
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