Electronics Desiccants

Moisture Control Solution for Electronics Components and Semiconductor Devices

Electronic components — particularly Moisture Sensitive Devices (MSDs) such as semiconductor ICs, microprocessors, and SMD modules — can be permanently damaged when moisture permeates their plastic housings during storage. When a moisture-loaded MSD is subsequently soldered at high temperature (> 260°C during reflow soldering), the trapped moisture rapidly vaporises, triggering the "popcorn effect" — generating micro-cracks or internal delamination within the package that irreversibly destroys the device. CEMACOSG supplies Silica Gel and Clay desiccants compliant with JEDEC/IPC standards for the electronics industry, designed for use inside moisture barrier bags (MBBs) to protect MSDs according to their assigned moisture sensitivity level (MSL) classification.

Recommended Products

In electronics, Silica Gel is the near-universal standard — electrically inert, dust-free (no conductive particle risk), non-reactive with solder flux and metallic component leads, and regenerable multiple times at 120–150°C. Indicator-type Silica Gel (CoCl₂-free) using safe orange/pink transition indicators enables visual saturation monitoring without hazardous cobalt compounds. Most common sizes: 1g–10g for MBBs protecting individual devices; 50g–100g for JEDEC trays and tape-and-reel packaging; 500g–1,000g hanging format for component warehouse storage areas. CaCl₂ powder desiccants must not be used in electronics packaging — liquid leakage would immediately corrode component leads and destroy PCBs.

Compliance Standards

• JEDEC J-STD-033D — the governing standard for handling, packing, shipping, and use of MSDs; specifies MBB + desiccant + Humidity Indicator Card (HIC) requirements per MSL classification (levels 1–6).
• JEDEC J-STD-020E — MSL classification standard; defines floor life (maximum time an MSD may remain outside sealed packaging at < 30°C/60% RH) from MSL 1 (unlimited) to MSL 6a (6 hours).
• IPC/JEDEC J-STD-001 — soldering standard requiring verified moisture control of components prior to reflow/wave soldering.
• RoHS Directive 2011/65/EU + RoHS 3 (2015/863/EU) — CEMACOSG Silica Gel and Clay are free from lead, cadmium, mercury, hexavalent chromium, PBDE, and PBB.
• ESD (Electrostatic Discharge) safety — desiccant packets are non-conductive and safe for use in ESD-controlled environments; should be enclosed within ESD shielding bags when co-packed with ESD-sensitive devices.

Dosage Reference

Per JEDEC J-STD-033D: sealed MBB contents must be maintained at RH < 10% throughout the specified shelf life. Calculation formula: W = (V × ΔRH × ρ_air) / (C_SG × 100), where V is MBB volume (litres), ΔRH is maximum permissible RH variation, ρ_air is water vapour density (g/m³), and C_SG is Silica Gel moisture absorption capacity (%). Practical applications: MBB 20 cm × 30 cm containing a JEDEC tray: 5–10g Silica Gel. Large PCB storage box (30 cm × 40 cm × 5 cm): 10–20g. Component storage container 50 L: 50g. Component warehouse room (~50 m²): combine 500g hanging Silica Gel units with industrial dehumidifier to maintain RH < 50%.

Standard Packing Procedure per JEDEC J-STD-033D

1. Dry bake components before MBB sealing — if devices have exceeded floor life or are suspected of moisture ingress, dry bake per the time-temperature table in J-STD-033D (e.g., MSL 3: 40°C/5% RH for 33 hours; or 125°C for 10 hours for heat-tolerant packages).
2. Insert HIC (Humidity Indicator Card) inside the MBB — a three-level indicator card (10%, 20%, 30% RH) enables rapid MBB integrity verification upon receipt at the receiving factory.
3. Place the correct quantity of Silica Gel per J-STD-033D calculations — use CoCl₂-free Silica Gel, positioned in a corner of the MBB, not in direct contact with component leads.
4. Heat-seal the MBB — use a dedicated impulse heat-sealer; verify seal integrity by gentle air pressure or seal test strips.
5. Label with MSL and bag-seal date — mark MSL level, floor life, and bag-seal date on the outer label as required by J-STD-033D to enable proper first-in/first-out inventory management.

Why Choose CEMACOSG

• CoCl₂-free, RoHS-compliant Silica Gel — meets the supply chain requirements of global electronics manufacturers including Samsung, LG, Foxconn, Flextronics, and tier-1/tier-2 EMS providers.
• Wide range of small sizes (1g–10g) — readily available for MBB, JEDEC tray, and small component packaging applications where other suppliers require high MOQs or do not carry stock.
• J-STD-033D dosage calculation support — technical team assists in calculating exact Silica Gel quantities per MBB volume and component MSL level.
• Stable supply to electronics factories in HCMC, Dong Nai, and Binh Duong — scheduled delivery aligned with production cycles; buffer stock available under blanket order agreements.