Terminal blocks and screw terminals
Half the weight is plastic and steel screws, and brass with steel still in it gets bid as irony brass, not brass.
How to spot it
Green, blue or black plastic blocks along a board edge with visible screw heads and wire entries — Euro-style rising clamp, barrier strips, or two-piece pluggable Phoenix and Wago styles. Ubiquitous on industrial control, PSU, alarm and lighting boards.
Metal content
| Metal | Quantity | Notes |
|---|---|---|
| Copper | 110–200 g/lb | brass cages and current bars are roughly 60–65% Cu, but plastic and steel screws are a large share of mass |
At 4 Aug 2026 spot prices that works out to $1.60 per pound of contained metal — Copper 150 g = $1.60. A refiner paying $1.2 returns about 75% of that, which is normal: refining costs money and the buyer takes a margin.
Safe removal
Working temperature: Hot air 360–390 °C
Hot air at 360–390 °C; the pins are thick and go into heavy pours. Faster: crack the plastic in a vice, pull the brass cages, back the steel screws out separately. That step is the difference between $2.50 and $1.00 a pound.
Hazards
NEVER dry sweep or use compressed air on a scrapping bench. HEPA-vac or wet-wipe only.
NEVER burn card plastic or cable jacket.
NEVER burn boards, wire insulation or plastic. Ever.
Before you scrap it
The common trap
Questions
How much gold is in terminal blocks and screw terminals?
Copper: 110–200 g/lb. At current spot that is about $1.60 of contained metal per pound.
How do you identify terminal blocks and screw terminals?
Half the weight is plastic and steel screws , and brass with steel still in it gets bid as irony brass, not brass.
How do you remove terminal blocks and screw terminals safely?
Hot air at 360–390 °C; the pins are thick and go into heavy pours. Faster: crack the plastic in a vice, pull the brass cages, back the steel screws out separately. That step is the difference between $2.50 and $1.00 a pound.
Is terminal blocks and screw terminals worth more working than as scrap?
Better than scrap. Pluggable Phoenix Contact, Wago and Weidmüller connectors sell $1–5 each; generic Euro blocks are worth cents.
Related in Contacts & relays
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