TO-3
- Picture & Models
- Description
- Unite Price
- Quantity
- Operation
-
-
Voltage References LT1031 - Precision 10 Volt Reference
-
1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 8012
-
-
Standard Regulator 1.2V to 37V 0.1A 8-Pin SOIC N Rail
-
1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 7500
-
-
Trans IGBT Chip N-CH 600V 80A 375000mW 3-Pin(3+Tab) TO-3P Tube
-
1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 10
-
Q:What defines the physical structure of TO-3?
A:Key features include:
- Metal can packaging: Robust hermetically sealed metal casing for durability.
- Central mounting hole: Facilitates secure heatsink attachment (e.g., M3/M4 screw compatibility).
- 2-pin layout: High-current leads (typically 10–20A rated) with radial or vertical orientation.
- Large thermal base: 20–25 mm diameter baseplate for efficient heat dissipation. -
Q:Why choose TO-3 over alternatives?
A:Critical advantages:
- High power handling: Supports up to 100W+ dissipation (vs. TO-220’s ~50W).
- Thermal Performance: Direct metal-to-heatsink contact for <1.5°C/W thermal resistance.
- Electrical Benefits: Low-inductance leads for stable high-current applications.
- Reliability: Hermetic sealing ensures moisture/chemical resistance (MIL-STD compliant). -
Q:What are common technical specs?
A:Standard configurations (consult datasheets):
- Body Size: 22.5 mm diameter (round can).
- Height: 10.5 mm (excluding leads).
- Lead Spacing: 5.45 mm (standard pitch).
- Material: Aluminum/stainless steel casing, copper alloy leads.
- Temp Range: -65°C to +200°C (military-grade options available). -
Q:Where is TO-3 typically applied?
A:Dominant use cases:
- Power electronics: Linear regulators (e.g., LM317K), motor drivers.
- High-voltage devices: Audio amplifiers (e.g., 2N3055 transistors).
- Aerospace/defense: Ruggedized systems requiring hermetic sealing. -
Q:What are critical assembly guidelines?
A:Key recommendations:
- Heatsink Mounting: Use thermal grease + 5–10 N·m torque on mounting screw.
- PCB Design: Reinforced holes for lead strain relief; avoid thin traces.
- Handling: Avoid bending leads repeatedly (risk of metal fatigue).
- Inspection: Visual check for can integrity and lead oxidation pre-soldering.



ALL CATEGORIES