5868 & TB4/1250 Tubes For Sale: TB4/1250 Tube Specs, Data Sheet & Substitute Info
5868 & TB4/1250 tubes for sale
Single or multiple 5868 and TB4/1250 tubes for sale.
If you’re looking for a 5868 or TB4/1250 tube for sale, you’re usually trying to match an existing designation used in RF/dielectric heating systems where uptime matters. This page is built to help you confirm the basics fast, then use the data sheet to verify operating limits and mechanical requirements before ordering.
The Penta Laboratories 5868 and TB4/1250 is a high-power power triode used in industrial RF energy applications, including generator setups found in RF heat sealing equipment. If you’re replacing an existing unit, we can confirm that our 5868 and TB4/1250 tubes are a plug and play replacement for these part numbers from other manufacturers.
You may also see the Amperex TB4/1250 tube listed as a variant in legacy documentation or installed systems. Electrically this tube is equivalent to the 5868, but the identifying markings and cross-references can differ (more details below).
If you’re still browsing options across families, you can also buy vacuum tubes by category. For other industrial tube applications we support, or you can explore our range of magnetrons for sale.
Penta Laboratories 5868 tube specs
Note: These are general specifications for quick matching. Use the data sheet to confirm the full set of electrical and mechanical requirements for your specific system.
Penta Laboratories 5868 general specifications
| Specification | Details |
|---|---|
| Type | Power Triode |
| Maximum Plate Dissipation | 1250 Watts |
| Maximum Output Power | 1.7 kW |
| Filament Voltage | 10 Volts |
| Filament Current | 9.9 Amps |
| Amplification Factor | 28 |
| Cooling | Forced Air |
Amperex TB4/1250 tube specs
The Amperex TB4/1250 and 5868 tubes are commonly treated as the same tube type for electrical matching, but they may appear in legacy inventories, instrument documentation, and cross-reference lists under different labels. If your system documentation calls out Amperex specifically, the instrument and part-number mapping below can help confirm you’re matching the correct tube.
Compatible instruments (as listed in legacy references):
- ELTRA: CS2000, CS800, Elementrac CS-i, SurfaceC-800
- LECO: CS125/225, CS200/C200/S200/WC200, CS230, CS244/344/IR212/232, CS300, CS400/C400/S400, CS444/IR412/432, CS600/CSL600, CS744/844, WR112
OEM equivalent parts:
- ELTRA: 77210
- LECO: 771-354
Manufacturer cross-reference part numbers:
- 771-354 (LECO)
- 77210 (ELTRA)
- SC1866
- AR354
Note: General specifications below mirror the core electrical expectations of the 5868 tube above. Use the data sheet and your equipment documentation to confirm integration requirements.
Amperex TB4/1250 general specifications
| Specification | Details |
|---|---|
| Type | Power Triode |
| Maximum Plate Dissipation | 1250 Watts |
| Maximum Output Power | 1.7 kW |
| Filament Voltage | 10 Volts |
| Filament Current | 9.9 Amps |
| Amplification Factor | 28 |
| Cooling | Forced Air |
5868 & TB4/1250 tube data sheet download
For full electrical limits, mechanical dimensions, socket/pinout requirements, and cooling guidance, use the data sheet below. If you need help verifying your operating conditions against the data sheet, contact us and share your equipment model and any tube markings.
5868 & TB4/1250 tube substitute & equivalent information
The Penta Laboratories 5868 & Amperex TB4/1250 are commonly sourced for maintenance and replacement where an existing 5868 or TB4/1250 is already in use. The Penta 5868 can be used as a direct replacement for an existing 5868 or TB4/1250 in all applications.
Common cross-reference naming may include alternate labels such as RS1016 and AX-9902 in some catalogs. If your documentation lists an alternate designation, we can help you validate whether it maps to a true 5868 or TB4/1250 tube equivalent for your application.
If you need another 5868 or TB4/1250 tubes set for a multi-tube deck or want guidance on confirming interchangeability for specific equipment, share your system details, and we’ll help you verify the best match.
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