COMPONENT SOURCING / DS
Discrete semiconductors
Discrete devices can look alike while behaving differently in a circuit. Put the complete ordering code first, then identify the ratings and test conditions your engineering team needs to preserve.
- MOSFETs
- Diodes & rectifiers
- Transistors
SOURCING CHECKLIST
Details to include with your RFQ
Keep the requirements on the same enquiry. Mark unknown details for confirmation.
- 01
Device identity
Manufacturer, full part number, device type and package. Include polarity, pin assignment and any automotive or other application qualification requirement.
- 02
Electrical conditions
Voltage, current and power requirements under the actual operating conditions. For MOSFETs, include gate drive and the on-resistance conditions that matter to the design.
- 03
Switching behaviour
Where relevant, record switching frequency, capacitance, reverse recovery, gate charge or forward voltage requirements for engineering comparison.
- 04
Thermal and mechanical fit
Package drawing, mounting constraints, cooling arrangement and the operating temperature range required by your application.
- 05
Purchase constraints
Quantity, carrier, required delivery date and any specific date-code or traceability documents needed for the purchase.
ENGINEERING REVIEW
Keep the original requirement visible
Do not select a discrete replacement by its headline voltage and current alone. Those values do not establish equivalent thermal performance, switching behaviour or safe operation in your circuit.
List a proposed alternative separately with its full code and approval status. Confirm the part, quantity, condition, documentation and delivery assumptions before purchasing.
Read the alternatives checklistCOMMON QUESTIONS
Before you enquire
Is a higher current rating automatically better?
No. Ratings depend on stated conditions, package and cooling. An engineer should compare the complete datasheets against the application rather than approve a single higher number.
Can an alternative package be quoted?
Label it as a proposed alternative and include its full ordering code. Mechanical, thermal and board changes require engineering approval before it becomes a purchase requirement.