DXW21BN2511NL Murata Electronics Filter (Other) In Stock
Murata DXW21BN2511NL is a 13.56 MHz RF transformer for NFC/RFID signal conditioning in a compact 0805 (2.0 x 1.25 mm) surface mount package. Key specs: 20V DC input, 250 mA rated current, 1 dB insertion loss, 1.2 mm height. Available from stock with worldwide shipping.
- Manufacturer
- Murata Electronics
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- DXW21BN2511NL Datasheet PDF
- Category
- Filter
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Optimized for 13.56 MHz NFC and RFID applications with 1 dB maximum insertion loss, preserving signal strength in reader antenna matching circuits
- Compact 0805 (2.0 x 1.25 mm) surface mount package with 1.2 mm height enables integration into ultra-slim NFC-enabled devices and smart cards
- Rated 20V DC input voltage and 250 mA current capacity supports robust NFC reader front-end circuits and ISO 14443/15693 compliant antenna driver stages
- Tape-and-reel (TR) packaging on 7-inch reels supports high-volume automated SMT assembly for IoT devices and contactless payment modules
Applications
DXW21BN2511NL is used in NFC reader antenna matching networks, RFID transponder front-ends, and contactless smart card interfaces operating at the ISO 14443/15693 standard frequency of 13.56 MHz. The RF transformer provides impedance matching between the NFC controller IC output and the antenna loop, maximizing power transfer while maintaining a 1 dB low insertion loss for maximum read range in retail payment terminals, access control readers, and IoT sensor tags. Its 0805 SMT footprint and 1.2 mm height integrate directly onto the antenna board of mobile payment modules and wearable NFC devices with tight form-factor constraints.
Specifications
| Factory Lead Time | 8Weeks |
| YTEOL | 7 |
| Cut-off Frequency-Min | 13.56MHz |
| Height | 1.2mm |
| Input Voltage-Nom | 20V |
| Insertion Loss | 1dB |
| Mounting Feature | SURFACE MOUNT |
| Packing Method | TR, EMBOSSED, 7 INCH |
| Surface Mount | YES |
| Transformer Type | RF TRANSFORMER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what frequency is the DXW21BN2511NL RF transformer optimized, and what NFC standards does it support?
The DXW21BN2511NL is optimized for 13.56 MHz, the internationally standardized frequency for NFC and RFID communication per ISO 14443, ISO 15693, and FeliCa protocols. The transformer's 13.56 MHz cut-off frequency and 1 dB insertion loss make it suitable for Class 1 through Class 4 NFC devices in contactless payment, access control, and electronic article surveillance (EAS) applications requiring reliable data transfer at ranges up to 10 cm.
What is the insertion loss specification of the DXW21BN2511NL and why does it matter for NFC read range?
The DXW21BN2511NL has an insertion loss of 1 dB at 13.56 MHz, meaning it passes approximately 79% of incident RF power to the antenna with minimal dissipation. For NFC reader applications, every 1 dB reduction in insertion loss translates directly to improved antenna efficiency and longer read range; with 1 dB loss, a reader antenna system designed for 50 mm nominal range retains over 90% of its theoretical maximum read range in a real-world 13.56 MHz deployment.
What are the maximum voltage and current ratings for the DXW21BN2511NL in NFC antenna driver circuits?
The DXW21BN2511NL is rated for 20V DC input voltage and 250 mA continuous current, which comfortably accommodates the typical 3.3V to 12V supply rails and 100 mA to 200 mA antenna drive currents used in commercial NFC reader ICs. The 20V headroom also provides safe operation during voltage spikes from ESD events or resonant antenna voltage build-up, protecting the front-end matching circuit in high-traffic access control and retail payment terminal environments.
How does the 0805 package and 1.2 mm height of DXW21BN2511NL benefit NFC-enabled wearable or card-form-factor designs?
The 0805 footprint (2.0 mm x 1.25 mm) with 1.2 mm maximum height allows the DXW21BN2511NL to fit within the 1.5 mm to 2.0 mm PCB-plus-component stack budget of NFC smart card modules and wearable wristband PCBs. Compared to larger 1206 or SMD transformer alternatives, the 0805 form factor reduces the area consumed by the antenna matching network by approximately 40%, freeing board space for the NFC controller IC and battery in ultra-compact IoT designs.
What is the typical factory lead time for DXW21BN2511NL, and how should procurement teams plan for NFC module production?
The DXW21BN2511NL carries a factory lead time of approximately 8 weeks when ordered direct from Murata. For NFC module production schedules with less than 8 weeks between order and assembly, procurement teams should leverage authorized distributor buffer stock or pre-book blanket orders to avoid supply gaps. The 7-inch tape-and-reel packaging standard supports just-in-time delivery to SMT lines producing contactless payment and access control hardware in volumes from 1000 to 100,000 units per month.
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