B72540E1140S262 EPCOS Varistor (Varistors Chip) In Stock
EPCOS B72540E1140S262 is a flame-proof SMD chip varistor rated for 16 V continuous voltage with a 40 V clamping voltage at 8/20 µs impulse and 5.8 J energy absorption capacity. It protects sensitive circuits from transient voltage surges in 12 V to 14 V RMS power systems and data lines. This ceramic transient voltage suppressor is available in stock with worldwide shipping for industrial and consumer electronics protection applications.
- Manufacturer
- EPCOS
- Package
- Varistors Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- B72540E1140S262 Datasheet PDF
- Category
- Varistor
- Price
- From $1.2600(MOQ 100)
- Temp Range
- -55.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16 V maximum continuous voltage with 40 V clamping voltage (8/20 µs) provides fast overvoltage protection for 12 V system rails
- 5.8 J energy absorbing capacity handles high-energy transient pulses in automotive and industrial power protection circuits
- Flame-proof construction meets safety standards for board-level protection in consumer and industrial equipment
- SMD chip package (5.7 mm × 2.5 mm) enables compact surface-mount transient protection in space-constrained PCB designs
Applications
The B72540E1140S262 is designed for transient voltage protection in 12 V to 14 V DC power supply rails used in automotive electronics, industrial control modules, and consumer appliances where inductive load switching or external ESD events can generate voltage spikes exceeding 40 V. Its 5.8 J energy absorption rating makes it suitable for protecting against 8/20 µs lightning surge waveforms per IEC 61000-4-5, ensuring compliance with conducted immunity standards in industrial and domestic equipment. The flame-proof SMD chip format simplifies board-level surge protection designs by replacing bulky through-hole MOV components with a compact surface-mount alternative rated for 14 V RMS continuous operation.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 11Weeks |
| YTEOL | 7.47 |
| Additional Feature | FLAME PROOF |
| Circuit RMS Voltage-Max | 14V |
| Energy Absorbing Capacity-Max | 5.8J |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 2.5mm |
| Package Length | 5.7mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 5mm |
| Packing Method | TR, BLISTER, 7 INCH |
| Rated Power Dissipation (P) | 0.03W |
| Rated Temperature | 150°C |
| Reference Standard | AEC-Q200 |
| Resistor Type | VARISTOR |
| Surface Mount | YES |
| Technology | CERAMIC |
| Terminal Finish | MATTE TIN OVER NICKEL |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | WRAPAROUND |
| Working Voltage | 16V |
| Package | Varistors Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.40.40.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what voltage does the B72540E1140S262 clamp transient spikes, and how fast does it respond to surge events?
The B72540E1140S262 clamps transient voltage spikes to a maximum of 40 V during an 8/20 µs standard lightning surge impulse, as specified in IEC 61000-4-5 test conditions. Varistors respond to overvoltage events in nanoseconds (typically below 25 ns), making the B72540E1140S262 effective against both fast ESD pulses in the sub-microsecond range and slower 8/20 µs lightning surge waveforms on 12 V to 16 V system rails.
How much energy can the B72540E1140S262 absorb in a single transient event, and what does this mean for system protection design?
The B72540E1140S262 has a maximum energy absorbing capacity of 5.8 J per single 8/20 µs pulse. In practical terms, this corresponds to absorbing a 500 A peak surge current in a 12 V system without device failure. Designers should ensure the expected worst-case surge energy, calculated as 0.5 × L × I² for inductive load switching or per IEC 61000-4-5 test levels, remains below 5.8 J to maintain long-term protection reliability.
For which automotive or industrial overvoltage protection scenarios is the B72540E1140S262's 16 V rating well-matched?
The 16 V continuous voltage rating of the B72540E1140S262 is well-matched to 12 V automotive electrical systems where the alternator may produce up to 14.4 V during charging, with inductive load dump transients reaching 40 V to 60 V under ISO 7637-2 pulse profiles. It is also appropriate for industrial 12 V SELV power rails in PLC I/O modules and sensor interfaces, protecting against ESD events per IEC 61000-4-2 Level 4 (8 kV contact discharge) when used in combination with a series resistance to limit clamped current below the varistor's pulse current rating.
How does the SMD chip format of the B72540E1140S262 compare to through-hole MOV varistors in terms of board space and performance?
The B72540E1140S262 SMD chip package (5.7 mm × 2.5 mm) occupies approximately 14 mm² of PCB area and stands only 2.5 mm tall, compared to 7 mm diameter through-hole MOV discs that require approximately 38 mm² of PCB area plus a 3 mm lead clearance height of 10 mm or more. The surface-mount format enables automated assembly and allows the varistor to be placed within 5 mm of the protected component, minimizing the inductance of the clamping loop that would otherwise reduce effectiveness against fast rise-time ESD transients above 100 V/ns.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.6725 | $167.25 |
| 250+ | $1.5806 | $395.15 |
| 500+ | $1.5252 | $762.62 |
| 1000+ | $1.3100 | $1310.00 |
| 1500+ | $1.2800 | $1920.00 |
| 3000+ | $1.2600 | $3780.00 |
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