The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting, offering superior isolation and low capacitive coupling thanks to their dual cavity platform. Featuring rigid pin construction for enhanced board insertion and reliability, these transformers are suitable for a wide range of power applications from 1.1 VA to 36 VA. They are built with a Class F (155C) insulation system and meet stringent agency certifications including UL and CSA.
| Part Number | Secondary RMS Rating (Series) | Secondary RMS Rating (Parallel) | Power (VA) | Primary Configuration | Pins | Dielectric Strength (Vrms Hipot) | Insulation System | Weight (lbs/kg) |
|---|---|---|---|---|---|---|---|---|
| ST-2-10**# / DST-2-10**# | 10 VCT @ 0.11 A | 5 V @ 0.22 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-10*# / DST-3-10*# | 10 VCT @ 0.25 A | 5 V @ 0.5 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-10*# / DST-4-10*# | 10 VCT @ 0.6 A | 5 V @ 1.2 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-10*# / DST-5-10*# | 10 VCT @ 1.2 A | 5 V @ 2.4 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-10 / DST-6-10 | 10 VCT @ 2.0 A | 5 V @ 4.0 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-10 / DST-7-10 | 10 VCT @ 3.6 A | 5 V @ 7.2 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-12**# / DST-2-12**# | 12.6 VCT @ 0.09 A | 6.3 V @ 0.18 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-12*# / DST-3-12*# | 12.6 VCT @ 0.2 A | 6.3 V @ 0.4 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-12*# / DST-4-12*# | 12.6 VCT @ 0.5 A | 6.3 V @ 1.0 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-12*# / DST-5-12*# | 12.6 VCT @ 1.0 A | 6.3 V @ 2.0 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-12 / DST-6-12 | 12.6 VCT @ 1.6 A | 6.3 V @ 3.2 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-12 / DST-7-12 | 12.6 VCT @ 2.85 A | 6.3 V @ 5.7 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-16**# / DST-2-16**# | 16 VCT @ 0.07 A | 8 V @ 0.14 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-16*# / DST-3-16*# | 16 VCT @ 0.15 A | 8 V @ 0.3 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-16*# / DST-4-16*# | 16 VCT @ 0.4 A | 8 V @ 0.8 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-16*# / DST-5-16*# | 16 VCT @ 0.8 A | 8 V @ 1.6 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-16 / DST-6-16 | 16 VCT @ 1.25 A | 8 V @ 2.5 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-16 / DST-7-16 | 16 VCT @ 2.25 A | 8 V @ 4.5 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-20**# / DST-2-20**# | 20 VCT @ 0.055 A | 10 V @ 0.11 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-20*# / DST-3-20*# | 20 VCT @ 0.12 A | 10 V @ 0.24 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-20*# / DST-4-20*# | 20 VCT @ 0.3 A | 10 V @ 0.6 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-20*# / DST-5-20*# | 20 VCT @ 0.6 A | 10 V @ 1.2 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-20 / DST-6-20 | 20 VCT @ 1.0 A | 10 V @ 2.0 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-20 / DST-7-20 | 20 VCT @ 1.8 A | 10 V @ 3.6 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-24**# / DST-2-24**# | 24 VCT @ 0.045 A | 12 V @ 0.09 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-24*# / DST-3-24*# | 24 VCT @ 0.1 A | 12 V @ 0.2 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-24*# / DST-4-24*# | 24 VCT @ 0.25 A | 12 V @ 0.5 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-24*# / DST-5-24*# | 24 VCT @ 0.5 A | 12 V @ 1.0 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-24 / DST-6-24 | 24 VCT @ 0.8 A | 12 V @ 1.6 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-24 / DST-7-24 | 24 VCT @ 1.5 A | 12 V @ 3.0 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-28 / DST-2-28 | 28 VCT @ 0.04 A | 14 V @ 0.08 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-28 / DST-3-28 | 28 VCT @ 0.085 A | 14 V @ 0.17 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-28 / DST-4-28 | 28 VCT @ 0.2 A | 14 V @ 0.4 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-28 / DST-5-28 | 28 VCT @ 0.42 A | 14 V @ 0.84 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-28 / DST-6-28 | 28 VCT @ 0.7 A | 14 V @ 1.4 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-28 / DST-7-28 | 28 VCT @ 1.3 A | 14 V @ 2.6 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-36 / DST-2-36 | 36 VCT @ 0.03 A | 18 V @ 0.06 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-36 / DST-3-36 | 36 VCT @ 0.065 A | 18 V @ 0.13 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-36 / DST-4-36 | 36 VCT @ 0.17 A | 18 V @ 0.34 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-36 / DST-5-36 | 36 VCT @ 0.35 A | 18 V @ 0.7 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-36 / DST-6-36 | 36 VCT @ 0.55 A | 18 V @ 1.1 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-36 / DST-7-36 | 36 VCT @ 1.0 A | 18 V @ 2.0 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-48 / DST-2-48 | 48 VCT @ 0.023 A | 24 V @ 0.046 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-48 / DST-3-48 | 48 VCT @ 0.05 A | 24 V @ 0.1 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-48 / DST-4-48 | 48 VCT @ 0.125 A | 24 V @ 0.25 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-48 / DST-5-48 | 48 VCT @ 0.25 A | 24 V @ 0.5 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-48 / DST-6-48 | 48 VCT @ 0.4 A | 24 V @ 0.8 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-48 / DST-7-48 | 48 VCT @ 0.75 A | 24 V @ 1.5 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-56 / DST-2-56 | 56 VCT @ 0.02 A | 28 V @ 0.04 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-56 / DST-3-56 | 56 VCT @ 0.045 A | 28 V @ 0.09 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-56 / DST-4-56 | 56 VCT @ 0.11 A | 28 V @ 0.22 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-56 / DST-5-56 | 56 VCT @ 0.22 A | 28 V @ 0.44 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-56 / DST-6-56 | 56 VCT @ 0.35 A | 28 V @ 0.7 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-56 / DST-7-56 | 56 VCT @ 0.65 A | 28 V @ 1.3 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| ST-2-120 / DST-2-120 | 120 VCT @ 0.01 A | 60 V @ 0.02 A | 1.1 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.17 (0.08) |
| ST-3-120 / DST-3-120 | 120 VCT @ 0.02 A | 60 V @ 0.04 A | 2.4 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.25 (0.11) |
| ST-4-120 / DST-4-120 | 120 VCT @ 0.05 A | 60 V @ 0.1 A | 6 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.44 (0.20) |
| ST-5-120 / DST-5-120 | 120 VCT @ 0.1 A | 60 V @ 0.2 A | 12 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.70 (0.32) |
| ST-6-120 / DST-6-120 | 120 VCT @ 0.16 A | 60 V @ 0.32 A | 20 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 0.80 (0.36) |
| ST-7-120 / DST-7-120 | 120 VCT @ 0.3 A | 60 V @ 0.6 A | 36 | Single 115 V / Dual 115/230 V | 6 / 8 | 2500 | Class F, 155 C | 1.1 (0.50) |
| Size | VA | L (inches/mm) | W (inches/mm) | H (inches/mm) | ML (inches/mm) | A (inches/mm) | B (inches/mm) | C (inches/mm) | Mounting Hardware (Optional) | Weight (lbs/kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1.1 | 1.37 (34.9) | 1.12 (28.6) | 0.97 (24.6) | - | 0.25 (6.4) | 0.25 (6.4) | 1.20 (30.5) | - | 0.17 (0.08) |
| 3 | 2.4 | 1.37 (34.9) | 1.12 (28.6) | 1.21 (30.8) | - | 0.25 (6.4) | 0.25 (6.4) | 1.20 (30.5) | - | 0.25 (0.11) |
| 4 | 6 | 1.62 (41.3) | 1.31 (33.3) | 1.31 (33.3) | 1.06 (26.9) | 0.25 (6.4) | 0.35 (8.9) | 1.25 (31.8) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.44 (0.20) |
| 5 | 12 | 1.91 (48.4) | 1.59 (40.4) | 1.45 (36.9) | 1.25 (31.8) | 0.30 (7.6) | 0.40 (10.2) | 1.41 (35.8) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.70 (0.32) |
| 6 | 20 | 2.25 (57.2) | 1.88 (47.8) | 1.45 (36.9) | 1.50 (38.1) | 0.30 (7.6) | 0.40 (10.2) | 1.60 (40.6) | Nylon 4-40 x 1.37 (4-40 x 34.9) | 0.80 (0.36) |
| 7 | 36 | 2.62 (66.7) | 2.18 (55.5) | 1.59 (40.4) | (hole centers) | 0.40 (10.2) | 0.40 (10.2) | 1.85 (47.0) | 4 mounting holes for #6 screws (2.18 x 1.75 centers) | 1.1 (0.50) |
Note: Mounting hardware (ST-MS screw, ST-MN nut) available from Signal. Size 7 has 4 mounting holes on 2.18 x 1.75 centers for #6 screws.