Overvoltage and Overcurrent Protection
AssemblyCrowbar circuit (SCR or Zener + transistor) crowbarring output to ground on overvoltage, plus thermal shutdown limiting continuous dissipation. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Overvoltage and Overcurrent Protection parts and their functions
4 top-level parts · 4 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Crowbar SCR | 1× | Silicon-controlled rectifier (TIC225 or similar) shunting excess voltage to ground |
| 2 | Overvoltage Comparator | 1× | Precision comparator detecting voltage > setpoint + margin |
| 3 | Primary-Side Fuse | 1× | Primary-side fuse (15–20 A) protecting transformer and rectifier |
| 4 | Thermal Fuse | 1× | Thermostat or thermal cutoff in regulator dissipation path |
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Bill of materials for Overvoltage and Overcurrent Protection
4 top-level lines · 4 rows shown · 4 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Crowbar SCR | bench-power-supply-crowbar-scr | 1× | 1 | · | part |
| 2 | Overvoltage Comparator | bench-power-supply-crowbar-comparator | 1× | 1 | · | part |
| 3 | Primary-Side Fuse | bench-power-supply-fuse | 1× | 1 | · | part |
| 4 | Thermal Fuse | thermal-fuse | 1× | 1 | · | part |
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Where the overvoltage and overcurrent protection is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
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🇨🇳Foxconn
foxconn.com ↗
|
Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| flex.com ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| dixoninfo.com ↗ | Noida, IN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| bydelectronic.com ↗ | Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |