1.5SMB56A Alternative / Equivalent / Replacement

Introduction

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.

Product Overview

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.

Key Features

• 1500W peak: 1500W peak pulse power (10/1000µs).
• Unidirectional: Single-direction transient protection.
• 47.8V stand-off: Vrwm of 47.8V for 48V rail protection.
• Low leakage: 1µA max reverse current at Vrwm.
• AEC-Q101: Automotive-grade qualification.
• SMB package: Compact DO-214AA surface-mount.
• Wide temp: -55°C to +150°C operation.

Specifications / Electrical Parameters

Cross Reference

Comparison with Similar Models

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.

Applications

• Telecom power supply protection (48V)
• Industrial control system transient protection
• Automotive ECU overvoltage clamping
• Networking equipment surge protection
• DC-DC converter input protection
• Base station power rail protection

Why Choose YINT

• AEC-Q101 qualified for automotive applications
• 1500W peak pulse power in compact SMB package
• 100% tested for breakdown voltage and leakage
• RoHS and REACH compliant manufacturing
• Competitive pricing with reliable supply

Ordering Information

FAQ

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.

Conclusion

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.