Description
Unboxing & Hardware Overview
- Manufacturer & Architecture: Vishay General Semiconductor / International Rectifier (Discrete Semiconductor Division)
- Part Number: 120NQ045R
- Product Type: 120 A High-Current Schottky Rectifier Diode (Reverse Polarity / “R” Configuration)
- Physical Dimensions: Standard D-67 HALF-PAK chassis-mount package format
- Estimated Shipping Weight: 0.2 lbs (0.09 kg) enclosed in protective anti-static packaging
- Primary Condition Status: Factory New / New Surplus / Obsolete Lifecycle Status (active alternatives like the SMC Diode Solutions
120NQ045R-1are commonly deployed as direct form-fit functional substitutes)
Product Introduction
The 120NQ045R is a high-power Schottky rectifier module optimized for low forward voltage drop and high-frequency switching operations. Designed in a rugged D-67 HALF-PAK chassis-mount package, it handles up to 120 amperes of average rectified forward current with a 45 V DC reverse voltage threshold.
The “R” suffix designates reverse polarity pin configuration (where the anode and cathode connections are reversed relative to the standard base model layout), making it ideal for custom busbar arrangements, multi-diode parallel configurations, and high-efficiency power supplies, switch-mode power converters, and heavy-duty industrial battery chargers.
Core Technical Specifications
| Parameter | Value |
| Diode Technology | Schottky Rectifier (Fast Recovery \le 500 ns) |
| Maximum DC Reverse Voltage (V_{R}) | 45 V |
| Average Rectified Forward Current (I_O) | 120 A |
| Max Forward Voltage (V_F) | 570 mV @ 120 A (25^\circC) |
| Max Reverse Leakage Current (I_R) | 10 mA @ 45 V (25^\circC) |
| Non-Repetitive Peak Surge Current | ~1.86 kA peak half-sine wave |
| Junction Capacitance | 5200 pF (@ 5 V, 1 MHz) |
| Operating Junction Temperature | -55°C to +150°C |
| Mounting Package Style | D-67 HALF-PAK (Chassis Mount Module) |
Compliance & Standards Alignment
- Designed and manufactured in compliance with RoHS hazardous substance regulations.
- Built with robust metal-base packaging to guarantee structural stability and efficient thermal transfer when mated to external extruded heat sinks.
- Features high surge-current ratings to withstand sudden electrical transients in heavy industrial environments.
Technical Note: Because the original Vishay/IR 120NQ045R has reached active lifecycle obsolescence, system maintenance teams frequently substitute active equivalents such as the 120NQ045R-1 (SMC Diode Solutions), ensuring proper verification of forward voltage drop and terminal orientation before installation.
Storage & Asset Preservation Guidelines
- Store the module inside its protective anti-static containment or original factory packaging to prevent physical terminal oxidation.
- Keep warehouse storage environments dry with a relative humidity level maintained below 60%.
- Ensure the mounting surface of the HALF-PAK module remains completely flat and free of particulate debris to guarantee optimal thermal grease transfer during heatsink mounting.
Physical Installation Prerequisites
- Apply a thin, uniform layer of thermal interface compound (grease or pad) between the D-67 baseplate and the cabinet heat sink to prevent thermal runaway.
- Torque down chassis mounting hardware evenly to manufacturer specifications to avoid stressing or cracking the internal semiconductor die.
- Verify polarity matching (paying close attention to the reverse-polarity “R” designation) prior to connecting high-current busbars.
Buyer’s FAQ & Logistics
Q: What Harmonized System (HS) code applies to the international shipment of this diode module?
A: Discrete semiconductor diodes and rectifiers typically classify under HS code 8541.10. Confirm precise classification details with your licensed customs broker.
Q: Is the original Vishay part still actively manufactured?
A: No, the original part number is designated obsolete by the primary manufacturer, though active drop-in alternatives (such as SMC Diode Solutions -1 variants) are readily accessible.
Q: Is the listed online price final for procurement?
A: Note: Price is subject to market availability and remaining surplus stock levels; contact our technical sales desk for a formal, time-sensitive quotation.
