BYT3400B STMicroelectronics Diode (Other) In Stock
STMicroelectronics BYT3400B is a silicon fast-recovery rectifier diode with 3 A forward current, 400 V reverse voltage, maximum 1.5 V forward drop, and low-noise operation, in a 2-pin through-hole package.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- BYT3400B Datasheet PDF
- Category
- Diode
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fast recovery time minimizes switching losses at high frequencies in SMPS and inverter circuits handling up to 400 V reverse voltage
- Low forward voltage maximum 1.5 V reduces conduction losses, improving efficiency in rectifier bridge and freewheeling diode applications
- Low-noise silicon design suitable for sensitive power conversion stages where EMI from the rectifier stage must be minimized
Applications
The BYT3400B is used as an output rectifier or freewheeling diode in switched-mode power supplies and DC-DC converters operating up to 400 V. Its fast recovery characteristic reduces reverse-recovery switching losses in half-bridge and full-bridge topologies, improving efficiency at frequencies above 50 kHz. Industrial motor drive snubber circuits and UPS systems also use this diode to handle transient voltage spikes and provide reliable rectification under high forward current conditions.
Specifications
| YTEOL | 0 |
| Additional Feature | LOW NOISE |
| Application | FAST RECOVERY |
| Case Connection | CATHODE |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | RECTIFIER DIODE |
| Forward Voltage-Max (VF) | 1.5V |
| JESD-30 Code | R-PSSO-G2 |
| JESD-609 Code | e3 |
| Non-rep Pk Forward Current-Max | 60A |
| Number of Elements | 1 |
| Number of Phases | 1 |
| Output Current-Max | 3A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Qualification Status | Not Qualified |
| Rep Pk Reverse Voltage-Max | 400V |
| Reverse Current-Max | 20 µ A |
| Reverse Recovery Time-Max | 0.06 µ s |
| Reverse Test Voltage | 400V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Position | SINGLE |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.80 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What repetitive reverse voltage does BYT3400B block and which power supply topologies suit it?
The BYT3400B is rated for a repetitive peak reverse voltage of 400 V, making it suitable for mains-connected offline SMPS designs, half-bridge converters, and boost PFC front-ends where rectified AC bus voltages reach 300 V to 400 V DC. Its 3 A continuous forward current rating covers a wide range of low-to-medium power supply outputs.
How does the fast-recovery characteristic of BYT3400B reduce losses compared to standard rectifier diodes?
Standard rectifier diodes have reverse recovery times often exceeding 1 µs, causing significant switching losses at frequencies above 20 kHz. The BYT3400B's fast recovery time (typically well below 500 ns) reduces the reverse recovery charge, cutting switching losses in SMPS transformers and inductors and lowering EMI-related noise in the 100 kHz to 200 kHz operating range.
What is the maximum forward voltage of BYT3400B and how does that affect power dissipation?
The maximum forward voltage of BYT3400B is 1.5 V at rated forward current. For a 3 A continuous load, the worst-case conduction power loss is 4.5 W (1.5 V × 3 A). Designers should account for this in thermal management, ensuring adequate heatsinking or a suitable PCB copper area to keep junction temperature within the rated limit.
In a freewheeling diode role for a motor driver, how does the BYT3400B's rating compare to the circuit demands?
A motor drive bridge circuit running from a 24 V or 48 V DC bus typically requires a freewheeling diode rated for at least 2× the supply voltage to handle inductive kick, so 48 V systems need at minimum 100 V rated diodes. BYT3400B's 400 V rating provides an 8× margin over a 48 V bus, offering robust protection against inductive transient spikes up to 400 V peak.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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