ETD Cores

ETD (Economical Transformer Design) cores were developed specifically for Power Transformer cores used in Switched Mode power supplies. The combined cross-sectional area of the two outer limbs equals the cross-sectional area of the centre limb allowing an even flux distribution throughout the core. This ensures the absence of localised ‘hot spots’ that can reduce performance at high frequencies or high flux levels. Their round centre limb provides for minimal winding resistance, leakage inductance and copper eddy current losses. ETD Cores are available in a range of sizes and materials as per IEC 62317-6 together with their associated coil formers (both Horizontal and Vertical mounting) and clips.

Materials - Manganese Zinc Materials - Nickel Zinc ETD Cores Table

Dimensional details & AL Values with Tolerance Code

Part No.	Core	A mm	B mm	C mm	D mm	E mm	F mm	Effective Parameters			F5	F9	F5A	F44	F48	F9C	F10
Part No.	Core	A mm	B mm	C mm	D mm	E mm	F mm	le mm	Ae mm²	Ve mm³	F5	F9	F5A	F44	F48	F9C	F10
32-580-	ETD29/16/10	30.6_-1.6	16_-0.4	9.8_-0.6	22^+1.4	9.8_-0.6	10.7^+0.6	70.4	76	5376	-	-	2350/R	1950/R	2250/R	-	-
32-500-	ETD34/17/11	34⁺¹ _-0.6	17.5^-0.4	11.1^-0.6	25.6^+1.4	11.1_-0.6	11.8^+0.6	78.6	97.10	7640	2400/R	-	2840/R	2250/R	2711/R	-	-
32-520-	ETD39/20/13	38.9^+1.1 _-0.7	20_-0.4	12.8_-0.6	29.3^+1.6	12.8_-0.6	14.2^+0.8	92.20	125	11500	2700/R	-	3210/R	2470/R	2800/R	-	-
32-540-	ETD44/25/15	43.8^+1.2 _-0.8	22.5_-0.4	15.2_-0.8	32.5^+1.6	15.2_-0.8	16.1^+0.8	103	173	17800	3300/R	-	3920/R	3100/R	-	-	-
32-560-	ETD49/25/17	48.5^+1.3 _-0.9	24.9_-0.4	16.7_-0.8	36.1^+1.8	16.7_-0.8	17.80_Mini	114	211	24000	3700/R	-	4400/R	3525/R	4090/R	-	-
32-490-	ETD59/31/22	59.8^±1.4	31.2_-0.4	22.1_-0.9	43.6^+2.2	22.1_-0.9	22^+0.9	139	368	51200	5000/R	-	-	4900/R	5800/R	-	-