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The ER19/4.8/15 PoE++ Transformer is a high-power dedicated magnetic component independently developed by Nanjing Infinity Technology for Power over Ethernet PlusPlus systems, a leading product in the company’s ER series high frequency transformers. As a professional Power over Ethernet PlusPlus Transformer, it is tailor-made for CCM flyback and active clamp forward topologies, with a maximum supported power rating of 95W and an operating frequency range of 250-400kHz, perfectly meeting the high-power power supply and signal transmission requirements of modern PoE++ equipment. The ER19 PoE Transformer for Telecommunications adopts a high-precision magnetic core and optimized winding ratio design, with flexible output voltage options and excellent electrical performance, and is widely used in telecommunications, industrial systems and IoT intelligent equipment. With strict quality control and international certification compliance, it has become the first choice of PoE++ power supply components for global equipment manufacturers in the fields of wireless LAN and smart lighting.
As a High Power ER19/4.8/15 PoE++ Transformer for Wireless LAN, the product breaks the power limit of traditional PoE transformers, supporting a maximum output power of 95W, which can meet the high-power power supply needs of PoE++ equipment such as high-power wireless AP, industrial cameras and smart LED drivers. Its optimized power transmission structure ensures stable power supply under high load conditions, with low voltage drop and no heat accumulation, effectively improving the working stability of PoE++ systems.
The product has a stable operating frequency range of 250-400kHz, which is higher than the mainstream PoE transformer frequency in the market, and is specially adapted to high-frequency PoE++ power supply circuit design. It is exclusively tailored for CCM flyback and active clamp forward topologies, with perfect matching with the core circuits of PoE++ power supply modules, reducing the design difficulty and R&D cycle for customers. The high-quality ferrite core material effectively reduces frequency loss and ensures high energy conversion efficiency under high-frequency operation.
The ER19/4.8/15 PoE++ Transformer provides multiple flexible output voltage options (5V/12V/24V) and matching inductance values (100μH/153μH), which can be customized according to the power supply requirements of different PoE++ equipment. For ER19 PoE++ Transformer for Smart LED Lighting Networks, it can provide stable 12V/24V low-voltage power supply; for wireless LAN equipment such as high-power wireless AP, it can provide 5V high-current power supply, realizing one product for multiple scenarios and improving the versatility of the component.
Order Code | VIN | Vout1 | lout1 | Vout2 | lout2 | Vaux | L | n | lSAT | VT |
INF-ER19/4.8/15-153μH | 40-57V(DC) | 5 | 14 | - | - | 12 | 153 | 4:4:1:1:5 | - | 2250 |
INF-ER19/4.8/15-100μH | 40-57V(DC) | 24 | 3 | - | - | 12 | 100 | 4:4:4:4:4 | - | 2250 |
INF-ER19/4.8/15-153μH | 37-57V(DC) | 12 | 6 | - | - | 12 | 153 | 4:4:2:2:4 | - | 2250 |
The ER19/4.8/15 PoE++ Transformer is a core component for PoE++ power supply systems, and its typical applications cover the core ToB fields of telecommunications and IoT:
Telecommunications & Industrial Systems: 5G base station supporting equipment, industrial PoE power supply modules and industrial control terminal equipment (ER19 PoE Transformer for Telecommunications);
Wireless LAN Equipment: High-power wireless AP, WiFi routers and wireless access points (High Power ER19/4.8/15 PoE++ Transformer for Wireless LAN);
Security & Surveillance Devices: HD network cameras, PoE video recorders (DVR/NVR) and access control systems;
Smart LED Lighting Networks: High-power smart LED drivers, intelligent lighting control terminals (ER19 PoE++ Transformer for Smart LED Lighting Networks);
IoT Intelligent Equipment: PoE-powered intelligent sensors, industrial IoT gateways and portable smart terminals.
The ER19/4.8/15 PoE++ Transformer is manufactured in strict accordance with international PoE and magnetic component industry standards, and all products have obtained a number of authoritative certifications to ensure global market access:
Quality management system: ISO9001:2015 (Certificate No.: 31623Q10734R0S), the core production process complies with UL follow-up service procedures;
Product safety: UL (File E487712), CE, complying with IEC/EN PoE++ power supply safety standards;
Environmental protection: RoHS, meeting the EU environmental protection material requirements;
Chinese national certification: CQC (Certificate No.: CQC23001414401, CQC2001414403), complying with GB/T19212 series national standards.
| Main Category | Subcategory | Details |
| MOQ | Prototyping & Small-batch | 10 piece minimum order |
| Sample Service | Free proofing & custom service, 5 free samples (shipping at buyer’s cost) | |
| Bulk Order | 5,000 pieces and above with bulk pricing | |
| Lead Time | All Standard Components | Shipped within 5–7 working days |
| Custom Inductance / Pin Design (Sample) | Sample order confirmed within 5–7 working days | |
| Custom Inductance / Pin Design (Mass Order) | Shipped within 15–30 working days | |
| Payment Terms | Main Payment Term | T/T in advance, L/C at sight |
| Procurement Standard | Complies with global enterprise procurement standard for passive components | |
| Quality Deposit | No quality security deposit required | |
| Accepted Terms | FOB Shanghai / Nanjing / Hong Kong, T/T Advance | |
Quality Assurance | Manufacturing Defects | Free replacement for issues caused by manufacturing defects |
| Inspection Report | Batch inspection reports available as certification upon customer request | |
Packaging Specifications | Updated Packaging (2026) | Blister tray packaging; Sealed Tape & Reel for SMD products |
| Optional Packaging | Vacuum sealed packaging for customers with strict moisture-proof requirements |
Nanjing Infinity Technology provides professional customization and efficient procurement services for the ER19/4.8/15 PoE++ Transformer to meet the personalized needs of global ToB customers:
Customized Winding & Voltage: Customize winding ratio, output voltage and inductance value according to customers’ PoE++ power supply module design requirements;
Free Sample Testing: Provide free product samples for electrical performance and compatibility testing, and support sample adjustment according to test results;
Global Supply Chain: With a production and supply network centered in Nanjing and covering the world, it supports mass production and global delivery, with a short lead time;
One-stop Technical Service: Provide professional PoE++ circuit matching guidance, product installation and after-sales maintenance services, and establish a long-term cooperative technical support mechanism with customers;
ODM/OEM Cooperation: Support deep customization of product labels, packaging and structural size according to customers’ brand and product integration requirements.
