17 * Applied standards : ECSS-Q-ST-70-02C , MIL-STD-202 , DO-160 and ESCC 3201 generic specification for space products * Power input max. 250 mW * Isolation prim. to sec. 500 VDC minimum * Suitable for IR and vapor reflow soldering * SMD or through-hole cases * Bandwidth : 100 KHz to 400 MHz * Operating temperature - 55 C to + 125 C * Weight : 1 gram * Shielded version upon request Electrical Data (25C) ID Code WRFT41 1R0 1X WRFT41 2R0 1X WRFT42 2R0 1X WRFT41 2R5 1X WRFT41 4R0 1X WRFT42 5R0 1X WRFT42 8R0 1X WRFT41 12R 1X WRFT41 13R 1X WRFT42 13R 1X WRFT41 16R 1X WRFT42 16R 1X Impedance ratio () 50 : 50 50 : 100 50 : 100 center tap 50 : 125 50 : 200 50 : 250 center tap 50 : 400 center tap 50 : 600 50 : 650 50 : 650 center tap 50 : 800 50 : 800 center tap To Order Connections 3 dB Bandwidth (MHz) 2 dB 1 dB 0.35 - 400 0.30 - 300 0.10 - 200 0.10 - 100 0.20 - 350 0.30 - 300 0.10 - 140 0.20 - 110 0.30 - 130 0.30 - 120 0.30 - 120 0.10 - 75 0.35 - 200 0.5 - 250 0.5 - 100 0.1 - 50 0.35 - 300 0.6 - 200 0.1 - 90 0.5 - 80 0.4 - 85 0.7 - 80 0.7 - 80 0.2 - 30 2 - 50 2 - 230 2 - 50 0.1 - 20 2 - 100 0.5 - 100 1 - 60 1 - 50 1 - 65 5 - 20 5 - 20 0.3 - 20 6 # ### 1 Range 1 = without center tap 2 = with center tap Impedance ratio Version 1 6 1 3 4 3 2 4 Shielded Version 6 1 5 2 4 3 Marking WRFT4 # ### 1x WRFT4 Center tap Standard x x = S surface mount x = P through hole x = Q Shielded MB4x xxx MB4x xxx: Microspire part number yyww : Date code Typical Dimensions (mm) Surface-mount case WRFT4# ### 1S 5.5 Through-hole case WRFT4# ### 1P 5.5 0.2 5.5 0.2 yywwP 4.5 0.2 Pin Section 0.7 x 0.3 0.15 5.5 0.2 0.1 0.2 4.5 0.2 +0.2 -0 SMD shielded case WRFT4# ### 1Q yywwP Pin Section 0.7 x 0.3 90 105 6.9 +0.2 -0 10.1 0.3 7.62 6 5 4 1 2-CT 3 Top view 6 1.78 1.1 3 2 1 7.10 MAX Weight : 1 gram 11.0 4 5 6 1.78 7.20 1.10 3.556 Drill Diameter 0.9 min. Applications Packaging Impedance matching, DC isolation, balanced-unbalanced mixing, power splitting, coupling and signal inversion Tel : + 33 (0) 3 82 59 13 33 7.62 3.556 yywwP 10.1 0.3 12 4 5 6 MAX 5.3 MAX PCB Layout (suggested) 3 2 1 6.80 Pin 6 DOT www.microspire.com Individually packed in a 160 x 137 x 55 cardboard box. 40 parts on 2 layers Specifications may change without prior notice - Revised 06/08 .....High Grade Technologies............ .....RF and Data Magnetics............. .....Wide Band RF Transformers............ Wide Band RF Transformers - WRFT 4x Series