Product Overview
Signal's CL2 Series Class 2 Transformers are designed for printed circuit and chassis mount applications. Available in inherently or non-inherently limited versions, these transformers are UL 1585 / UL 5085 recognized and RoHS compliant. They offer a power range from 2.5 VA to 50 VA, featuring dual primaries (115/230 V, 50/60 Hz) and a single secondary. The split bobbin construction eliminates the need for an electrostatic shield, and the Class F insulation system (155 C) ensures reliability. Bobbin and shroud materials are rated UL 94V0 for flammability.
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
- Insulation System: Class F (155 C)
- Flammability Rating: Bobbin and shroud material rated UL 94V0
- RoHS Compliant: Yes
- Customization: Custom versions available upon request.
Technical Specifications
General Specifications
| Specification | Details |
|---|---|
| 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)
Dimensions & Mechanical Specifications (Example for CL2 Series PC Mount)
| VA | Dimensions (Inches/mm) | Mounting Screw Size | Qty | Weight (lbs/kg) |
|---|---|---|---|---|
| L x W x H* | ||||
| 2.5 | 1.62 (41.3) x 1.43 (36.5) x 1.12 (28.6) | #4 | 2 | 0.25 (0.11) |
| 5.0 | 1.62 (41.3) x 1.43 (36.5) x 1.37 (34.9) | #4 | 2 | 0.37 (0.17) |
| 10.0 | 1.87 (47.6) x 1.56 (39.7) x 1.37 (34.9) | #4 | 2 | 0.53 (0.24) |
| 20.0 | 2.25 (57.2) x 1.87 (47.6) x 1.62 (41.3) | #4 | 2 | 0.90 (0.41) |
| 30.0 | 2.62 (66.7) x 2.18 (55.5) x 1.56 (39.7) | #6 | 4 | 1.15 (0.52) |
| 50.0 | 3.00 (76.2) x 2.50 (63.5) x 1.83 (46.5) | #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, either in series or parallel connected (as one winding).
2504101957_Bel-Fuse-CL2-50-12_C17185968.pdf
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