Chip Quik NC191AX50T5 Leaded Solder Paste 50g
- T5 powder, 15 to 25 microns
- 89.5% metal by weight
- Sn63/Pb37 alloy, 183 C (361 F) melting point
- Synthetic no-clean flux, ROL0
- Halogen free per EN14582
- Stencil life over 8 hours at 20 to 50% RH
- Refrigerated shelf life over 12 months
Last refreshed Sep 28, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A leaded no-clean solder paste in a jar with a fine powder grade and a flow-focused flux. It contains lead and needs cold storage and a warm-up period.
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ASIN: B08KRB2J11Model: NC191AX T5Category: Solder
Overview
A lower density flux vehicle does the work in this Chip Quik Smooth Flow paste, spreading under shear and flowing better as it heats. The fine powder grade and synthetic no-clean flux come packed in a jar.
The reason to buy it is the finer powder grade in a jar, with shelf life and stencil life stated for two humidity bands. The limitation is the handling: the alloy is leaded and the paste must be refrigerated and tempered before each session.
Who it's for
Production lines and repair shops running leaded processes with fine features are the intended users. Hobbyists needing only a few joints, and teams limited to lead-free materials, should look at a smaller or different product.
Pros and cons
- Fine powder grade
- Flow-focused flux vehicle
- Halogen free per test method
- No-clean synthetic flux
- Needs refrigeration and warm-up
- Bulk jar wastes paste on small jobs
Performance notes
The flux vehicle is designed for better spread under shear, which helps the paste release cleanly through a stencil and flow as heat is applied. Humidity sets the working window: stencil life is longer at lower humidity and shorter at higher. Cleaning stencils can be automated or done by hand with isopropyl alcohol.
Specifications
| Brand | Chip Quik |
|---|---|
| Model | NC191AX T5 |
| Dimensions & fit | |
| Particle size | T5 (15 to 25 microns) |
| Size | 50 g jar |
| Item weight | 1.76 ounces |
| Package dimensions | 1.97 x 1.93 x 1.34 inches |
| Construction & materials | |
| Shelf life | Over 12 months refrigerated, over 6 months unrefrigerated |
| Other details | |
| Alloy ratio | Sn63/Pb37 (leaded) |
| Melting point | 183 C (361 F) |
| Flux type | Synthetic no-clean |
| Halogen | Halogen free (EN14582) |
| Metal content | 89.5% by weight |
| Flux classification | ROL0 |
| Stencil life | Over 8 hours at 20 to 50% RH, over 4 hours at 50 to 70% RH (22 to 28 C) |
| Storage | Refrigerate at 3 to 8 C (37 to 46 F), do not freeze |
Frequently asked questions
How big is the Chip Quik NC191AX50T5 jar?
The paste is sold as a 50 g jar. Listed package dimensions are 1.97 x 1.93 x 1.34 inches and the item weight is 1.76 ounces.
Can the Chip Quik NC191AX50T5 jar be kept at room temperature?
The listing says to refrigerate at 3 to 8 C and not to freeze it. Shelf life is over 12 months refrigerated and over 6 months unrefrigerated.
Is the Chip Quik NC191AX50T5 paste halogen free?
Yes, by the EN14582 test method. It uses a synthetic no-clean flux classified ROL0.