Product Overview
Signal's CL2 Series Class 2 Transformers are designed for printed circuit board (PCB) and chassis mounting. Available in inherently or non-inherently limited versions, these transformers meet UL 1585 / UL 5085 recognition standards. They feature dual primaries (115/230 V, 50/60 Hz) and a single secondary, with split bobbin construction eliminating the need for an electrostatic shield. The insulation system is Class F (155C), and the bobbin and shroud material carry a UL 94V0 flammability rating. These transformers are RoHS compliant.
Product Attributes
- Brand: Signal
- Series: CL2 Series
- Mounting Types: Printed Circuit Mount, Chassis Mount
- Limitation Types: Inherently Limited, Non-Inherently Limited
- Agency Certifications: UL recognized to UL 1585 / UL 5085-3 Class 2 (File # E116583), CSA certified to C22.2 #66.1
- RoHS Compliant: Yes
- Insulation System: Class F (155C)
- Flammability Rating: Bobbin and shroud material rated UL 94V0
- Custom versions available upon request.
Technical Specifications
General Specifications
| Specification | Value |
|---|---|
| Power Range | 2.5 VA to 50 VA |
| Dielectric Strength | 4000 Vrms Hipot |
| Primaries | Dual primaries, 115/230 V, 50/60 Hz |
| Secondary | Single secondary |
| Class 2 Rating | Inherently or non-inherently limited |
| Electrostatic Shield | Not necessary (split bobbin construction) |
Part Number Selection & Fuse Requirements
| Part Number | Secondary RMS Rating | Secondary Fuse Required | Limitation Type |
|---|---|---|---|
| CL2-20-12 | 12 V @ 1.66 A | N/A* | Inherently limited |
| CL2-20-24 | 24 V @ 0.833 A | N/A* | Inherently limited |
| CL2-30-12 | 12 V @ 2.50 A | 3.0 A** | Non-inherently limited |
| CL2-30-24 | 24 V @ 1.25 A | 1.75 A** | Non-inherently limited |
| CL2-50-12 | 12 V @ 4.20 A | 5.0 A** | Non-inherently limited |
| CL2-50-24 | 24 V @ 2.10 A | 2.5 A** | Non-inherently limited |
| CL2-2.5R-12 | 12 V @ 0.20 A | N/A* | Inherently limited |
| CL2-2.5R-24 | 24 V @ 0.10 A | N/A* | Inherently limited |
| CL2-5.0R-12 | 12 V @ 0.42 A | N/A* | Inherently limited |
| CL2-5.0R-24 | 24 V @ 0.20 A | N/A* | Inherently limited |
| CL2-10R-12 | 12 V @ 0.83 A | N/A* | Inherently limited |
| CL2-10R-24 | 24 V @ 0.42 A | N/A* | Inherently limited |
* Inherently limited
** Non-inherently limited (Maximum secondary fuse value specified)
Mechanical Specifications (Dimensions in Inches (mm))
| VA | L | W | H* | A | B | C | Sq. Pin Dimension Size | Mounting Dimensions | Mounting Screw Size | Qty | Weight lbs (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.5 | 1.62 (41.3) | 1.43 (36.5) | 1.12 (28.6) | .20 (5.1) | .25 (6.4) | 1.00 (25.4) | 0.025 (0.64) | 1.06 (26.9) | #4 | 2 | 0.25 (0.11) |
| 5.0 | 1.62 (41.3) | 1.43 (36.5) | 1.37 (34.9) | .20 (5.1) | .40 (10.2) | 1.00 (25.4) | 0.025 (0.64) | 1.06 (26.9) | #4 | 2 | 0.37 (0.17) |
| 10.0 | 1.87 (47.6) | 1.56 (39.7) | 1.37 (34.9) | .20 (5.1) | .40 (10.2) | 1.14 (29.0) | 0.036 (0.91) | 1.25 (31.8) | #4 | 2 | 0.53 (0.24) |
| 20.0 | 2.25 (57.2) | 1.87 (47.6) | 1.62 (41.3) | .40 (10.2) | .40 (10.2) | 1.46 (37.1) | 0.036 (0.91) | 1.50 (38.1) | #4 | 2 | 0.90 (0.41) |
| 30.0 | 2.62 (66.7) | 2.18 (55.5) | 1.56 (39.7) | .55 (14.0) | .27 (7.0) | 1.68 (42.7) | 0.045 (1.02) | 1.75 (44.5) | #6 | 4 | 1.15 (0.52) |
| 50.0 | 3.00 (76.2) | 2.50 (63.5) | 1.83 (46.5) | .60 (15.2) | .30 (7.6) | 1.90 (48.3) | 0.045 (1.02) | 2.00 (50.8) | #6 | 4 | 1.70 (0.77) |
* Dimension H represents the total distance from the seating plane to the uppermost surface, stand offs and/or risers inclusive.
Note: Primaries are designed to be used simultaneously. They must be used either series or parallel connected (as one winding).
2411272146_Bel-Fuse-CL2-2-5R-12_C17343036.pdf
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