SMD Transformers - E10 EM Series
Product Overview
The TDK Electronics E10 EM series comprises high-performance SMD transformers designed for a variety of demanding applications. These transformers feature a robust construction with a ferrite core, SMD gullwing pins, and triple-insulated wire, ensuring reliability and safety. They are qualified to AEC-Q200 and designed in compliance with key IEC standards, offering a wide operating temperature range up to +150 C. Ideal for isolated DC/DC converters, gate driver circuits, and digital isolator ICs, the E10 EM series provides excellent electrical insulation and operational stability.
Product Attributes
- Brand: TDK Electronics
- Series: E10 EM series
- Construction: Ferrite core (MnZn), SMD gullwing pins, Triple insulated wire, Non-conductive pick-and-place cap
- Insulation System: UL1446 class 155(F)
- Certifications: AEC-Q200 Qualified, RoHS compatible
- Delivery Mode: Blister tape (380 mm diameter), 280 pcs per reel
- Plastic Materials: UL94-V0, CTI 175
- Insulated Wire: UL60950-1, Annex U
Technical Specifications
| Specification | Value |
|---|---|
| Height | 11.35 mm max |
| Operating Temperature Range | -40 C +150 C (component) |
| Weight | Approx. 2 g |
| Typical Operational Frequency | 100 ... 500 kHz (typ.) |
| High Voltage Test (AC N1 / N2) | 3000 V AC (50 Hz, 1 s) |
| High Voltage Type Test (AC, N1 / N2) | 3750 V AC (50 Hz, 60 s) |
| Partial Discharge Inception Voltage (N1/N2) | >900 V peak (type test) |
| Partial Discharge Extinction Voltage (N1/N2) | >700 V peak (type test) |
| Creepage Distance N1 / N2 | >6 mm; cumulative, core floating |
| Clearance Distance N1 / N2 | >5.5 mm; cumulative, core floating |
| Creepage Distance [N1,N2] / core | >3 mm |
| Clearance Distance [N1,N2] / core | >2.75 mm |
| Clearance, Creepage core / top surface | >2 mm |
| Pollution Degree | P2 (to IEC 60664) |
| Insulation Thermal Class | +155 C (F) (to IEC 60085) |
| Climatic Category | 40/150/56 (to IEC 60068) |
| Storage Conditions | 25 C +40 C, humidity 75% RH |
| Resistance to Reflow Soldering Heat | In accordance with JEDEC J-STD-020D, Tpeak= +245 C (Tpeak 5 C for 30 seconds) |
| Overvoltage Category | OVC II |
| CTI | 175 |
| Altitude | 2 km / 5 km (depending on OVC/Pollution Degree) |
Characteristics and Ordering Codes
| Topology | Turns Ratio N1/N2 | LN1 (H) | Lleak,typ, N1 (H) | Isat,N1 (A) | E*dtN1 (max, unipolar/ bipolar) (Vs) | RDC,N1 (m) | RDC,N2 (m) | Cp N1/N2 (pF) | Fig. | Ordering Code |
|---|---|---|---|---|---|---|---|---|---|---|
| B1, B2 | 1 : 1.08 | 100 | 0.35 | - | 15 / 30 | 350 | 410 | 9 | F1 | B78307A2276A003 |
| B1, B2 | 1 : 0.76 | 100 | 0.45 | - | 18 / 36 | 360 | 300 | 9 | F1 | B78307A9741A003 |
| B1, B2 | 1 : 3.67 | 10 | 0.1 | - | 10 / 20 | 200 | 700 | 6 | F2 | B78307A2385A003 |
| B3,B4 | 1 : 4 2 10% | 0.06 | 4 | -105 | 340 | 4 | F3 | B78307A2338A003 | ||
| B3,B4 | 4 : 1 25 10% | - | 1 | - | - | - | 4 | F4 | B78307A2338A003 |
Note: 1) T150 C, B= 200 mT, B= 400 mT (bipolar mode). The maximum volt-sec rating limits the peak flux density to B= 200 mT when used in a unipolar drive application. For bipolar drive applications, a maximum volt-sec of two times is acceptable (B 400 mT). 3) B78307A2238A003 Configuration 1 : 4 use pins 8-5 for primary; Configuration 4 : 1 use pins 2-3 for primary. 4) T150 C, L drop 20% 5) T150 C, B= 200 mT, B= 400 mT (bipolar mode). The maximum volt-sec rating limits the peak flux density to B= 200 mT when used in a unipolar drive application. For bipolar drive applications, a maximum volt-sec of two times is acceptable (B 400 mT).
Applications
- Isolated DC/DC converters (bridge and flyback topology)
- Gate driver circuits (e.g., for 650 V IGBTs)
- Digital isolator ICs
2411272151_TDK-B78307A9741A003_C17645656.pdf
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