Key facts
- Brand
- 3M
- Model
- 1245 Tape
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-09
Start here
3M 1245 Tape Data Sheet
3M 1245 Tape consists of an embossed 1‑ounce dead‑soft copper foil backing with an aggressive pressure‑sensitive acrylic adhesive. The embossed pattern penetrates the adhesive to create reliable metal‑to‑metal contact, making the tape suitable for grounding and EMI shielding in equipment, components, and shielded rooms.
The tape offers a backing thickness of 1.4 mil (0.04 mm), total thickness of 4.0 mil, breaking strength of 25 Ib./in, adhesion to steel of 35 oz/in, and an electrical resistance through the adhesive of 0.001 Ω. It passes UL‑recognized flame‑retardancy tests and provides typical far‑field shielding effectiveness of 75‑85 dB from 80 MHz to 1 GHz.
3M 1245 Tape specifications
| Backing thickness | 1.4 mil (0.04 mm) |
|---|---|
| Total thickness (backing plus adhesive) | 4.0 mil (101mm) |
| Breaking strength | 25 Ib./in (44 N/10mm) |
| Adhesion to steel | 35 oz/in (3.8 N/10mm) |
| Flame retardancy | Pass (UL 510) |
| Shielding effectiveness (far field) | 75‑85 dB (80 MHz‑1 GHz) |
Source: 3M 1245 Tape Data Sheet
All 3M 1245 Tape documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical shielding effectiveness of 3M 1245 Tape?
It provides 75‑85 dB of shielding effectiveness in the far field, measured from 80 MHz to 1 GHz.
From: 3M 1245 Tape Data Sheet
What is the backing thickness of the 1245 Tape?
The copper foil backing is 1.4 mil (0.04 mm) thick.
From: 3M 1245 Tape Data Sheet
What is the typical shielding effectiveness of 3M 1245 Tape?
Typical shielding effectiveness (far field) is in the range of 75 dB to 85 dB (30 MHz to 1 GHz).
What widths and lengths are available for 3M 1245 Tape?
Widths range from ¼" to 23"; standard length is 18 yards, with longer lengths available on request.