描述
Micromax 4321 Resistor Paste, Cermet Trimmers
Type: Resistor Paste
Application: Cermet Trimmers / Potentiometers
Resistivity: 100 Ω/sq
Firing: 850°C / 30 min
Shelf Life: 6 months
MacDermid Alpha Micromax 4321 is a resistor paste from the 4300 Series, designed for cermet trimmers and potentiometers with 100Ω/sq sheet resistivity. Featuring fast 30-minute 850°C firing, CRV less than 1%, and excellent rotational life — compatible with stainless steel wipers and high-Ag conductors per TDS specifications.
Micromax 4321 is a resistor paste from the 4300 Series, specifically designed for high-performance cermet trimmers and potentiometers. This composition offers a sheet resistivity of 100Ω/sq, delivering excellent contact resistance variation (CRV) of less than 1%, superior rotational life, and outstanding solder dip stability. It is suitable for various wiper materials including stainless steel, providing design flexibility for trimmer and potentiometer applications.
The paste is optimized for 325-mesh screens with 10-16 μm emulsion thickness, producing a dried film thickness of 23-27 μm. Drying is performed at 150°C for 10-15 minutes. The fast 30-minute firing cycle with a 10-minute peak at 850°C improves production throughput. The composition is compatible with high silver containing conductors including Micromax 7780 terminations. Available in 100G and 1000G containers.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We maintain stable inventory of authentic MacDermid Alpha Micromax 4321 resistor paste. Factory-original TDS and batch-specific COA can be provided upon request for your trimmer and potentiometer projects.
Request Sample, TDS & Quotation
Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 4321
- 100Ω/sq sheet resistivity — ideal for trimmer and potentiometer applications per TDS specifications
- Fast 30-minute firing profile — 10-minute peak at 850°C for high-throughput production per TDS specifications
- CRV less than 1% — excellent contact resistance variation for reliable trimmer performance per TDS specifications
- Excellent rotational life — stable performance after 200 cycles per TDS specifications
- Stainless steel wiper compatible — suitable for various wiper materials per TDS specifications
- High-Ag conductor compatible — compatible with Micromax 7780 and high silver containing conductors per TDS specifications
- Cadmium free — formulated without intentional addition of cadmium per TDS specifications
- 325 mesh printable — optimized for standard stainless steel screens with 10-16 μm emulsion per TDS specifications
Primary Applications
- Cermet trimmers — resistor elements for high-performance trimmers per TDS specifications
- Potentiometers — resistive elements for potentiometer applications per TDS specifications
- Variable resistors — variable resistor elements for various applications
- Stainless steel wiper applications — compatible with stainless steel and other wiper materials per TDS specifications
Full Technical Specifications
| Property | Typical Value | TDS Reference |
| Product Type | Thick film resistor paste | TDS: Resistor paste |
| Application | Cermet trimmers, potentiometers | TDS: Variable resistor |
| Packaging Specification | 100G, 1000G | — |
| Resistivity | 100 Ω/sq | TDS: 100 |
| Viscosity (Brookfield HAT 10 rpm) | 120-200 Pa.s | TDS: 120 to 200 Pa.s |
| Recommended Mesh | 325 mesh | TDS: 325 mesh |
| Emulsion Thickness | 10-16 μm | TDS: 10 to 16 μm |
| Recommended Film Thickness | 23-27 μm | TDS: 23 to 27 μm |
| Leveling Time | 10-15 min | TDS: 10-15 min |
| Drying Temperature | 150°C | TDS: 150°C |
| Drying Time | 10-15 min | TDS: 10-15 min |
| Firing Peak Temperature | 850°C | TDS: 850°C peak |
| Firing Cycle | 30 min | TDS: 30 min (10 min at peak) |
| HTCR (25-125°C) | 0±200 ppm/°C | TDS: 0±200 |
| CTCR (-55-25°C) | 0±200 ppm/°C | TDS: 0±200 |
| CRV | <1% | TDS: <1 |
| Rotational Life (200 cycles) | <1% ΔR | TDS: <1 |
| Short Term Overload Voltage | 28 V/mm | TDS: 28 |
| Standard Working Voltage | 11.2 V/mm | TDS: 11.2 |
| Maximum Rated Power Dissipation | 741 mW/mm² | TDS: 741 |
| Resistivity Tolerance | 30-120 Ω | TDS: 30-120 |
| Termination Compatibility | Micromax 7780 / high-Ag conductors | TDS: 7780 termination |
| Wiper Compatibility | Stainless steel and other wiper materials | TDS: various wiper materials |
| Substrate Compatibility | 96% alumina | TDS: 96% alumina |
| Thinner | Micromax 8250 | TDS: 8250 |
| Shelf Life | 6 months | TDS: 6 months |
| Storage Temperature | 5-30°C | TDS: 5-30°C |
Note: All listed values are typical and may vary by batch. Independent qualification testing is required prior to production use.
Recommended Processing Conditions
| Parameter | Recommended Value | TDS Reference |
| Mixing Prior to Use | Slow gentle hand-stirring with clean spatula, 0.5-1 minute | TDS: 0.5-1 minute |
| Optimal Printing Temperature | 20-23°C | TDS: 20-23°C |
| Screen Mesh | 325 mesh stainless steel | TDS: 325 mesh |
| Emulsion Thickness | 10-16 μm | TDS: 10-16 μm |
| Dried Film Thickness | 23-27 μm | TDS: 23-27 μm |
| Leveling Time | 10-15 minutes at room temperature | TDS: 10-15 min |
| Drying Temperature | 150°C | TDS: 150°C |
| Drying Time | 10-15 minutes | TDS: 10-15 min |
| Firing Peak Temperature | 850°C | TDS: 850°C |
| Total Firing Cycle | 30 minutes (10 min at peak) | TDS: 30 min |
| Firing Atmosphere | Air (oxidizing) | TDS: air oxidizing |
| Substrate | 96% alumina | TDS: 96% alumina |
| Termination | Micromax 7780 / high-Ag conductors | TDS: 7780 termination |
Handling and Storage Recommendations
| Storage Rules | Store in tightly sealed containers in clean, stable environment at 5-30°C. | TDS: 5-30°C |
| Shelf Life | 6 months in unopened containers from date of shipment. | TDS: 6 months |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling may occur during storage. | — |
| Thinning | Not normally required; use Micromax 8250 thinner sparingly for evaporative losses. | TDS: 8250 |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 4321 original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
| SDS | Safety Data Sheet for handling and storage | Request SDS |
Frequently Asked Questions
What is Micromax 4321?
Micromax 4321 is a resistor paste from the 4300 Series, designed for cermet trimmers and potentiometers with 100Ω/sq resistivity and fast 30-minute 850°C firing per TDS specifications.
What is the resistivity of Micromax 4321?
100Ω/sq per TDS specifications.
What is the firing cycle for Micromax 4321?
A fast 30-minute firing cycle with a 10-minute peak hold at 850°C per TDS specifications.
What is the CRV performance of Micromax 4321?
CRV is less than 1% per TDS specifications.
What mesh screen is recommended for Micromax 4321?
325 mesh stainless steel screens with 10-16 μm emulsion thickness per TDS specifications.
What wiper materials are compatible with Micromax 4321?
Various wiper materials including stainless steel per TDS specifications.
What packaging options are available for Micromax 4321?
Standard 100G and 1000G containers. Bulk supply options are available upon request.
Get MacDermid Alpha Micromax 4321 Bulk Pricing and Technical Support
We supply authentic MacDermid Alpha Micromax 4321 resistor paste for cermet trimmer and potentiometer applications. Contact our team for bulk quotations, sample availability, technical documentation, and application support.
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Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots.
