DFB2060 Single Phase Bridge Rectifier
Description Marking on Device: ON (onsemi logo), QH51, DFB2060 Manufacturer: onsemi (ON Semiconductor) Device Type: Single-Phase, Full-Wave Bridge Rectifier Package: TS-6P / 4-SIP (4-Pin, Through Hol…
Description
Description
- Marking on Device: ON (onsemi logo), QH51, DFB2060
- Manufacturer: onsemi (ON Semiconductor)
- Device Type: Single-Phase, Full-Wave Bridge Rectifier
- Package: TS-6P / 4-SIP (4-Pin, Through Hole, with center mounting hole)
-
Pin Configuration (left to right, as marked on body):
Pin Symbol Function 1 + DC Output (Positive) 2 ~ AC Input 3 ~ AC Input 4 − DC Output (Negative)
What This Component Does
This device converts an AC (alternating current) input into a pulsating DC (direct current) output. It integrates four diodes internally in a bridge configuration, allowing full-wave rectification from a single component — both halves of the incoming AC waveform are converted into usable DC. It's typically placed right after the transformer or AC input stage in a power supply, ahead of the smoothing/filter capacitor.
Core Electrical Ratings
| Parameter | Symbol | Rating |
|---|---|---|
| Max Peak Reverse Voltage | VRRM | 600V |
| Max DC Reverse Voltage | VR | 600V |
| Average Rectified Forward Current | Io | 20A |
| Max Forward Voltage Drop | VF | 1.1V @ 20A |
| Max Reverse Leakage Current | IR | 10µA @ 600V |
| Non-Repetitive Peak Forward Surge Current | IFSM | 250A |
| Operating Junction Temperature | TJ | −55°C to +150°C |
| Package / Case | — | 4-SIP, TS-6P |
| Mounting Type | — | Through Hole |
Important Usage Notes (for support/troubleshooting reference)
- Heatsinking is required to reach the full 20A rating: The center mounting hole is designed for direct heatsink attachment. Without adequate heatsinking, safe continuous current is significantly lower — check thermal contact first if a unit is running hot or underperforming.
- 600V VRRM is a hard limit: Reverse voltage spikes above this rating — common with inductive loads like motors, solenoids, or relay coils — can permanently damage the internal diode junctions. A snubber circuit or MOV across the AC input is recommended in such circuits.
- Inrush current at power-up is normal: A brief current surge while charging input filter capacitors is expected and falls within the 250A surge rating, provided it's momentary rather than sustained.
- AC pins are non-polarized; DC pins are not: The two "~" terminals can be wired in either orientation, but the "+" and "−" DC output pins must be connected correctly to protect downstream circuitry.
- Genuine onsemi branding: Look for the circular "ON" logo alongside the date/lot code (e.g., "QH51") — counterfeit or rebranded parts are common in this category, so verify markings match official onsemi datasheets when sourcing replacements.
Typical Applications
Switching mode power supplies (SMPS), AC adapters, battery chargers, motor drive rectification stages, and general-purpose AC-to-DC power conversion circuits.
When to Replace This Component
Failure typically results from: a reverse voltage transient exceeding 600V, sustained current draw beyond the 20A rating, inadequate heatsinking leading to thermal breakdown, or a downstream short circuit causing sustained overcurrent. A failed unit usually tests as shorted (or occasionally open) across its terminals when checked with a multimeter in diode test mode.
Package Includes:
- 1 x DFB2060 Single-Phase Bridge Rectifier (TS-6P/4-SIP)
