Anti-static equipment splits into two functional families — active ionizers (powered, generate ions at the workpiece) and passive ESD materials (dissipative/conductive, drain charge to ground) — and the active family further divides by discharge principle and form factor [S3].
Spec sheets in 2026 keep converging on the same core data: ionizer output voltage, secondary current limit, primary mains range, and IP rating are the four fields that decide whether a unit survives on a semiconductor line, a converting line, or a paint booth [S1][S2].
Discharge Principle: AC, DC, and Pulsed DC
AC corona ionizers drive a high-voltage AC waveform to emitter pins, producing balanced positive and negative ions each half-cycle and cleaning contaminated surfaces effectively without precision decay-time control [S2]. The Meech 904 AC/AC supply, for example, delivers 7 kV output at 5 mA from a 110 V / 240 V universal input and is purpose-built to feed Meech AC bars and nozzles [S2].
DC steady-state ionizers run separate positive and negative emitter rails, giving longer decay times but tighter residual charge — common in cleanroom and wafer-handling cells. Pulsed DC ionizers alternate the polarity on a fixed timing cycle, which lets the user trade off ion density vs. offset voltage; the Simco-Ion A Unit controller covers 3.3 – 7 kV AC at a 2.5 mA secondary limit, with an optional HR (high-residual) and D configuration for line-specific tuning [S1]. For a working definition of how ionizers fit inside the broader static-control stack, see the anti-static equipment encyclopedia entry.
Form Factor: Power Supplies, Bars, Nozzles, Guns, Curtains
Anti-static equipment on the active side is built from a small set of form factors that a process engineer wires together. The Simco-Ion A Unit is a multi-ionizer controller: 4 connection ports, 1.8 m cable, IP-54 housing in aluminium-and-steel powdercoat, weighing 2.8 kg, 50 W draw, 110 V / 230 V universal primary, 50/60 Hz [S1].
Meech's 904 supply feeds a deeper catalogue: anti-static bars (910, 912 circular, 914, 915), ionizing air nozzles (940, 942 in-line, 942F full-cone flexible), an ionizing air gun (954v2), and ambient ionizing air curtains (957, horizontal/vertical/door-sized) [S2]. The pattern is consistent — one supply, multiple emitter heads, and the emitter determines whether the static control is point, line, or area. The Simco-Ion spec sheet also lists 0 – 50 °C ambient operation, which is the real-world floor for most plastic-film and converting lines [S1].
Passive ESD Materials: Mats, Floors, Bags, Films
The passive family does not generate ions; it provides a controlled-resistance path so a charged surface bleeds to ground at a non-perturbing rate. Achilles Corporation's ESD line covers all four canonical passive forms: conductive rubber mat (PF Color Seiden Mat), long conductive floor material for walking (Elefeel Floor R), transparent anti-static bag (Sky Poly Bag), plus the broader category of equipment materials, packaging materials, and elimination equipment typical of Japanese ESD programmes [S3].
Selection between dissipative (10⁶ – 10⁹ Ω typical, by industry convention) and conductive (<10⁵ Ω) is set by the application: a soldering bench mat sits in the dissipative band to slow transient discharge, while a floor tile under an explosive-powder hopper trends conductive so a walking person never accumulates a potential. The packaging side — bags, films, wafer-pack foam — is specified by surface resistivity and static-decay time, with the Sky Poly Bag positioned for transparent, visible inspection of parts inside the bag [S3].
Selection Criteria: Voltage, Current, IP, and Mains Range
For active ionizers, the spec gate in 2026 is unambiguous. Output voltage window: 3.3 – 7 kV AC for the Simco-Ion A Unit [S1] and 7 kV fixed for the Meech 904 [S2]. Secondary current limit: 2.5 mA on the Simco-Ion [S1] and 5 mA on the Meech 904 [S2], with the higher current capable of driving more bars or longer bars before decay time degrades.
Primary supply: 110 V / 230 V at 50/60 Hz is now table stakes for both, and the 904 documents explicit 100–120 V and 200–240 V input versions by frequency, so a North American plant (60 Hz) and a European plant (50 Hz) cannot share the same SKU without verifying the part code [S2]. Environmental: IP-54 and 0 – 50 °C on the A Unit [S1] rules it out of wet washdown rooms but is fine for most dry converting and SMT lines. Approvals: UL on the Simco-Ion [S1] is the marker a US inspector will look for first.
Who It Is For — And Who It Is Not
Active ionizers are for processes that generate charge faster than passive materials can drain it: film unwinds, sheet feeders, paint spray, label converting, and any line handling webs above ~50 m/min. Passive mats, floors, bags, and films are for assembly benches, packaging cells, and storage/transport of sensitive components where the charge source is human handling, not web friction [S3].
Active ionizers are NOT a substitute for grounding wrist straps at an electronics assembly bench, and passive dissipative mats are NOT a substitute for ionizers on an unwinding film line. Specifying one for the other is a common error and shows up as recurring ESD events despite an apparently compliant workstation. The right read of the line is to ask where the charge originates — handling vs. web/spray — and pick the family that addresses that source. For a parallel spec-driven look at how static-control hardware is integrated into PV cell and module production, see PV manufacturing equipment: spec-driven selection map for cell, module, and test lines.
Comparison: Three Power Supplies on Four Criteria
Lining up representative units from the research material: Simco-Ion A Unit vs. Meech 904 (and noting that the Meech 905 is the low-voltage sibling). On output voltage, the A Unit spans 3.3 – 7 kV AC [S1] and the 904 holds a fixed 7 kV [S2]; the 905 sits in the low-voltage band for short-range applications. On secondary current, the A Unit is 2.5 mA max [S1] vs. the 904 at 5 mA [S2], so the 904 supports a longer bar string per supply.
On form factor, both are 2 – 3 kg bench/cabinet units with neon high-voltage indication, but only the A Unit is documented to IP-54 [S1]; the 904 datasheet does not list an IP code, so specifiers need to confirm with the vendor for washdown environments. On approvals, the A Unit is UL listed [S1] and the 904 carries CE/UKCA documentation typical of a UK-built unit, with the 50 Hz / 60 Hz SKU split explicitly called out [S2].
Limitations, Failure Modes, and Constraints
Ionizer output degrades visibly as emitter pins foul — the Simco-Ion HE air nozzle is engineered with the high-voltage points installed outside the air flow "to reduce fouling," but routine pin cleaning is still on the maintenance schedule [S1]. Current limit at 2.5 mA on the A Unit is a hard safety cap; pushing more bars onto a single supply past the rated count will lengthen decay time and can push offset voltage out of spec without any alarm [S1].
On the passive side, dissipative materials lose their resistivity band when coated with solder flux, oil, or paint, and the failure mode is silent: the mat still looks fine, the wrist-strap snap still clicks, but the surface is no longer dissipative. For plants where explosive atmospheres coexist with ESD programs, hardware selection must also respect zone classification — see Explosion-Proof Electrical Installation: Zone Mapping, Ex d vs Ex e vs Ex i, and Cable for the zone-classification framework that constrains which ionizer housings are acceptable in solvent-rich booths.
Standards, Sourcing, and Sizing
The research material references UL approval on the Simco-Ion A Unit [S1] and explicit 50 Hz vs. 60 Hz SKU separation on the Meech 904 [S2]. Plants bound by IEC 61340-5-1 (the canonical ESD-protected-area standard for electronics manufacturing) typically spec the dissipative band at 10⁶ – 10⁹ Ω for work surfaces, which lines up with the conductive rubber mat category Achilles sells [S3]. For users sourcing a complete kit, the catalogue pattern is one supply plus multiple emitter heads: one 904 supply can feed a 910 bar plus a 940 nozzle plus a 954v2 gun in the same cell, sharing one mains feed [S2].
Two trackable signals for the next spec cycle: ionizer vendors are pushing higher secondary current (5 mA is now standard on the 904 [S2], 2.5 mA on the older A Unit platform [S1]) to support longer bar strings per supply, and passive-material vendors are broadening the transparent anti-static bag category to serve optically inspected parts [S3]. Specifiers should weigh both when refreshing a 2027 ESD specification.
For the relevant spec sheets and selection criteria, see static var generator, and static pressure molding machine.