Product Overview
Dual Schottky Center-Tap Rectifier 15A 45V TO-220AB
Condition
Unused new old stock (NOS). Sourced from distributor inventory consolidation. Straight, untrimmed through-hole leads with clean surfaces. Markings read 94 20, B1545, and Motorola logo with AKA pinout indicator. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
Motorola MBR1545CT Schottky barrier power rectifier in a standard TO-220AB package. Dual center-tap diode array configured as Anode-Cathode-Anode (AKA), rated for 15A total average forward current (7.5A per leg) and 45V peak reverse voltage. Features an exposed metal mounting tab electrically common to the center cathode pin. Built for low forward voltage drop and fast switching recovery in high-frequency power circuits.
Key Features
- 15A total average rectified forward current (7.5A per leg)
- 45V peak repetitive reverse voltage rating
- Dual common-cathode center-tap configuration (A-K-A)
- Low forward voltage drop: 0.57V to 0.84V depending on current and junction temperature
- 150A non-repetitive peak forward surge current rating
- Standard TO-220AB package (Case 221A-09) with exposed metal mounting tab
- Junction operating temperature range from -65°C to +150°C
Applications
- Replacing failed secondary rectifiers on switched-mode power supply (SMPS) output rails.
- Installing as free-wheeling flyback diodes in low-voltage motor drives and solenoid drivers.
- Building low-drop polarity protection or solar battery charging circuits on maker bench projects.
- Upgrading linear DC bench supply secondary rectification stages for lower thermal dissipation.
Frequently Asked Questions
Is the mounting tab electrically isolated?
No. The TO-220AB package on this unit has an exposed metal tab connected internally to the center cathode pin. If mounting to a grounded heatsink shared with other potentials, an insulating mounting kit (mica/silicone pad and bushing) is required.
What do the face markings indicate?
The top line 94 20 represents the production date code (1994, week 20). B1545 is the device family mark for MBR1545CT, and the AKA stamping designates the pin layout: Pin 1 Anode, Pin 2 Cathode (connected to tab), Pin 3 Anode.
Why buy these individual pieces instead of an unverified surplus bulk lot?
You receive the exact, genuine Motorola component photographed, with clean untrimmed leads ready for through-hole assembly. Buying more pieces costs less each, and the price-break table on this page shows what each quantity costs. Orders ship for an $8 flat rate, qualify for free shipping at $28 or more, and leave our Idaho warehouse the same or next business day.
Nothing restores an old switching supply quite like authentic vintage Motorola silicon dropping right into place. Clean leads, honest center-tap geometry, and ready to get your rail back under regulation.
