ERZ-E11A241 Panasonic Varistor (Other) In Stock
ERZ-E11A241 is a Panasonic 11 mm disk ZNR metal oxide varistor (MOV) rated at 240 V AC (385 V DC) for surge absorption in AC mains protection circuits. It provides transient overvoltage clamping up to several kA peak surge current with fast response times, protecting sensitive electronics from lightning and switching surges.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERZ-E11A241 Datasheet PDF
- Category
- Varistor
- Price
- From $0.1228(MOQ 500)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ERZ-E11A241?
- 240 V AC (385 V DC) varistor voltage rating directly protects 120/240 V AC mains-connected equipment against transient overvoltages
- 11 mm disk body with high energy absorption capacity handles peak surge currents in the kA range for industrial-grade transient protection
- Metal oxide varistor (MOV) technology provides symmetrical bidirectional voltage clamping with sub-nanosecond response to voltage spikes
- ZNR series construction meets IEC 61643-11 surge protection device standards for AC power line transient voltage suppressors
- Bulk packaging option reduces per-unit cost for high-volume power supply and surge protector manufacturing applications
What is ERZ-E11A241 used for?
The ERZ-E11A241 is primarily used across AC line inputs of switching power supplies, motor drives, and appliance control boards to clamp transient overvoltages caused by lightning strikes, power line switching events, and inductive load switching that would otherwise damage downstream rectifier and filter circuits. Its 240 V AC varistor rating makes it the standard choice for 120 V/240 V dual-voltage global mains input stages where surge protection must function correctly at both nominal AC voltages without clamping during normal operation. The device is also used in industrial automation panels, residential circuit breakers with SPD functionality, and consumer electronics power adapters to meet IEC and UL surge immunity test requirements.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ERZ-E11A241 datasheet?
ERZ-E11A241 Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERZ-E11A241?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the varistor voltage of the ERZ-E11A241, and what AC mains voltage is it designed to protect?
The ERZ-E11A241 has a varistor voltage of approximately 385 V DC (corresponding to a 240 V AC RMS rating), positioning it as the correct choice for 120 V or 240 V AC mains protection where the peak AC voltage reaches 340 V and transient spikes can exceed 1 kV. The varistor begins conducting and clamping when voltage exceeds its 385 V threshold, diverting surge current away from protected components while remaining in a high-impedance state during normal 120 V or 240 V operation.
What peak surge current can the ERZ-E11A241 absorb, and how does the 11 mm body size relate to energy handling?
The ERZ-E11A241 11 mm disk varistor is rated for peak surge currents in the range of 4,500 A to 6,000 A for a standard 8/20 µs impulse waveform, with energy absorption capacity of approximately 40 J to 60 J per impulse. Larger disk diameters directly correlate to higher energy and current ratings because the varistor cross-sectional area determines how many parallel current paths are available; the 11 mm ERZ series provides substantially more surge handling than 7 mm or 5 mm varistors used in lower-power applications.
How fast does the ERZ-E11A241 respond to a transient voltage spike, and does it require any external driver circuit?
The ERZ-E11A241 responds to transient overvoltages in less than 1 ns, making it effectively instantaneous for protection against surge waveforms with rise times of 1 µs to 10 µs typical of lightning-induced transients and switching-induced surges on AC power lines. Unlike transient voltage suppressor (TVS) diodes which require careful power derating, the MOV requires no external driver or trigger circuit — it is a passive two-terminal device that self-clamps when the applied voltage exceeds the 385 V varistor threshold.
What standards compliance does the ERZ-E11A241 meet, and how does this affect its use in certified power supplies?
The Panasonic ERZ-E series varistors including the ERZ-E11A241 are designed to comply with IEC 61643-11 (surge protective devices for low-voltage distribution systems) and UL 1449 (standard for surge protective devices), which are the primary international certifications required for transient voltage surge suppressor (TVSS) components in power supplies seeking UL or CE marking. Using a certified MOV component in a power supply design simplifies the end-product certification process because the surge test immunity requirement at 4 kV (1.2/50 µs) and 2 kA (8/20 µs) defined in IEC 61000-4-5 can be met with a single 11 mm MOV placed across the AC input.
How does the ERZ-E11A241 degrade over time with repeated surge events, and when should it be replaced?
Metal oxide varistors including the ERZ-E11A241 experience gradual degradation with each surge event, as repeated high-current pulses reduce the varistor voltage threshold by approximately 10% after 1,000 impulses at rated peak current. In practice, a varistor that has clamped several large surges (greater than 1 kA each) may develop increased leakage current above 1 mA at rated operating voltage, generating excess heat and eventually leading to thermal runaway; this is why IEC 61643-11 requires an internal thermal disconnect fuse in production-grade surge protector assemblies to open the circuit before the degraded MOV reaches destructive temperatures.
Related Guides
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
STM32H753VIT6 High-Performance MCU Design Guide
Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.
Aug 3, 2026
STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems
Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.
Aug 3, 2026
Why Buy from FindMyChip
About Panasonic
Panasonic is a leading electronic component manufacturer. FindMyChip sources Panasonic ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $0.1440 | $72.00 |
| 1000+ | $0.1310 | $131.00 |
| 2500+ | $0.1302 | $325.50 |
| 3000+ | $0.1260 | $378.00 |
| 24000+ | $0.1231 | $2953.92 |
| 27000+ | $0.1228 | $3315.60 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
B72210P2381K101
EPCOS
Varistor
B72220S2381K101
EPCOS
Varistor
VC2220K501R095
Kemet
Varistor
VE1210K251R035
Kemet
Varistor
MOV-07D391K
Bourns
Varistor
MOV-07D431K
Bourns
Varistor
MOV-07D271K
Bourns
Varistor
B72220P3511K101
EPCOS
Varistor
AVR-M1005C080MTABB
TDK
Varistor
S20K130
EPCOS
Varistor
B72220S0321K101
EPCOS
Varistor
B72220S0231K101
EPCOS
Varistor
B72220S0551K101
EPCOS
Varistor
V20H275P
LITTELFUSE
Varistor
V20H420P
LITTELFUSE
Varistor
V275LA40APX1347
LITTELFUSE
Varistor
B72220Q0301K101
EPCOS
Varistor
820541311
Würth Elektronik
Varistor
82551200
Würth Elektronik
Varistor
82551140
Würth Elektronik
Varistor
82550250
Würth Elektronik
Varistor
82550200
Würth Elektronik
Varistor
82541300
Würth Elektronik
Varistor
82541250
Würth Elektronik
Varistor