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The 1.5SMB56A is a 1500W unidirectional TVS (Transient Voltage Suppression) diode in the DO-214AA (SMB) surface-mount package. It protects sensitive electronics from voltage transients induced by lightning, switching, and ESD events in 48V DC systems.
YINT Electronics 1.5SMB56A provides a stand-off voltage of 47.8V, with a breakdown voltage range of 53.2V to 58.8V (at 1mA test current). The clamping voltage is 77V at peak pulse current of 19.7A (8/20µs waveform).
AEC-Q101 qualified and rated for 1500W peak pulse power dissipation, this TVS operates from -55°C to +150°C. It comes in SMB tape-and-reel packaging (2500 pcs/reel) and is a direct replacement for 1.5SMB56A from Littelfuse, Vishay, ON Semi, and other brands.
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Peak Pulse Power | PPK | 1500 | W |
| Stand-off Voltage | Vrwm | 47.8 | V |
| Breakdown Voltage (Min) | Vbr | 53.2 | V |
| Breakdown Voltage (Max) | Vbr | 58.8 | V |
| Clamping Voltage | Vc | 77.0 | V |
| Peak Pulse Current | Ipp | 19.7 | A |
| Reverse Leakage | IR | 1.0 | µA |
| Test Current | iT | 1.0 | mA |
| Junction Temperature | TJ | -55 to +150 | °C |
| Package Type | DO-214AA (SMB) | ||
| Packing | 2500 pcs/reel |
| Brand | Part Number | Comment |
|---|---|---|
| YINT | 1.5SMB56A | Direct replacement |
| Littelfuse | 1.5SMB56A | Pin-to-pin compatible |
| Vishay | 1.5SMB56A | Drop-in equivalent |
| ON Semiconductor | 1.5SMB56A | Same SMB package |
| Diodes Inc. | 1.5SMB56A | Functional equivalent |
| Bourns | 1.5SMB56A | Direct alternative |
| Parameter | 1.5SMB56A (YINT) | 1.5SMB51A | 1.5SMB62A |
|---|---|---|---|
| Vrwm | 47.8V | 43.6V | 53.0V |
| Vbr Range | 53.2-58.8V | 48.5-53.6V | 58.9-65.1V |
| Vc (Max) | 77.0V | 70.1V | 85.0V |
| Ipp | 19.7A | 21.4A | 17.6A |
| PPK | 1500W | 1500W | 1500W |
The 1.5SMB56A is optimized for 48V DC rail protection. Use 1.5SMB51A for 42V systems or 1.5SMB62A for 56V systems. All share the same SMB footprint and 1500W power rating.
| Part Number | Package | Packing | MOQ |
|---|---|---|---|
| 1.5SMB56A | DO-214AA (SMB) | Tape & Reel, 2500 pcs | 2500 |
Q1: What is the stand-off voltage of 1.5SMB56A?
A1: 47.8V (Vrwm), suitable for 48V DC rail protection.
Q2: What is the clamping voltage?
A2: 77V maximum at 19.7A peak pulse current.
Q3: Is 1.5SMB56A bidirectional?
A3: No, it is unidirectional. For bidirectional, use 1.5SMB56CA.
Q4: What is the power rating?
A4: 1500W peak pulse power (10/1000µs waveform).
Q5: What package does it use?
A5: DO-214AA (SMB) surface-mount package.
Q6: Is it automotive qualified?
A6: Yes, AEC-Q101 qualified.
Q7: What is the operating temperature range?
A7: -55°C to +150°C junction temperature.
Q8: What is the marking code?
A8: Marking code is N15I.
Q9: Can it replace Littelfuse 1.5SMB56A?
A9: Yes, it is a direct pin-to-pin replacement.
The YINT 1.5SMB56A is an AEC-Q101 qualified 1500W TVS diode in SMB package, offering reliable 48V rail protection. Order 1.5SMB56A from YINT Electronics for competitive pricing.
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