Microchip Technology SMBG5377BE3/TR13

Overview

SMBG5377BE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 91 V, ±5% tolerance (B suffix), RoHS-compliant matte-tin plating (e3), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges, supports surge currents up to 760 A (8.3 ms half-sine), and operates from –65 °C to +150 °C junction temperature - used in industrial power supply overvoltage clamping and DC bus protection.

For engineers reviewing the SMBG5377BE3/TR13 datasheet, SMBG5377BE3/TR13 pinout, SMBG5377BE3/TR13 application, or SMBG5377BE3/TR13 equivalent, key selection criteria include Zener voltage accuracy at I_ZT = 15 mA, dynamic impedance of 75 Ω at 10% AC modulation, maximum regulator current of 52.5 mA, and thermal resistance R_θJA = 90 °C/W on FR4 board.

Technical Context

This device functions as a precision voltage reference and transient suppressor in DC power rails. Its Zener voltage is specified at 91 V ±5% measured at 15 mA test current (I_ZT) with dynamic impedance of 75 Ω, and it maintains stable regulation down to knee current I_ZK = 1.0 mA where Z_ZK = 52.5 Ω.

The SMBG5377BE3/TR13 uses a void-free thermosetting epoxy case (UL94V-0), gull-wing leads for visible solder joints, and achieves IPC/JEDEC moisture sensitivity level 1 - eliminating dry-pack requirements. It withstands 260 °C soldering for 10 s and exhibits non-sensitive ESD behavior per MIL-STD-750 Method 1020.

Key Specifications

Pinout & Package

DO-215AA gull-wing surface-mount package with cathode band marking; terminals are anode and cathode only - no internal circuitry or additional pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with SMBG5377BE3/TR13, 1N5377B offers mechanical robustness and ease of hand-soldering but sacrifices board space and automated assembly efficiency; SMBJ5377B matches SMT process flow but demands footprint redesign due to J-bend lead form - neither is pin-compatible without layout change.

Availability

SMBG5377BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply clamping, DC bus overvoltage protection, and telecom line card surge suppression requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for SMBG5377BE3/TR13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microsemi Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

The SMBG53xxB series targets surface-mount Zener regulation in space-constrained, high-surge environments - engineered for repeatable breakdown voltage, low dynamic impedance, and moisture-insensitive packaging.

FAQ

What is the Zener voltage tolerance of SMBG5377BE3/TR13?

The SMBG5377BE3/TR13 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its actual breakdown voltage falls between 86.45 V and 95.55 V when tested at 15 mA (I_ZT) and 30 °C. The tolerance is guaranteed per JEDEC specification and verified during 100% production testing - critical for precision clamping in regulated power supplies where tight voltage margins are required.

Does SMBG5377BE3/TR13 require dry packing before reflow soldering?

No, SMBG5377BE3/TR13 does not require dry packing prior to reflow soldering. Its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1, meaning it can be stored indefinitely at ambient conditions (≤30 °C / 60% RH) without baking. This eliminates pre-reflow baking steps, reduces assembly cost, and prevents moisture-induced delamination or popcorning during reflow - confirmed by Microsemi's qualification testing per MIL-STD-750.

What is the maximum continuous Zener current for SMBG5377BE3/TR13?

The maximum continuous Zener current (I_ZM) for SMBG5377BE3/TR13 is 52.5 mA at 25 °C lead temperature. This value is derived from P_D = 5.0 W and the upper-limit Zener voltage (V_ZM = 95.55 V) per Note 3 in the datasheet. Operation above this current requires thermal derating based on R_θJA = 90 °C/W - exceeding I_ZM risks thermal runaway and permanent parametric shift.

Can SMBG5377BE3/TR13 replace 1N5377B in existing designs?

SMBG5377BE3/TR13 is electrically equivalent to 1N5377B per Microsemi documentation, sharing identical V_Z, I_ZT, Z_ZT, and surge ratings. However, it cannot be a direct drop-in replacement without PCB modification: SMBG5377BE3/TR13 uses DO-215AA gull-wing packaging versus 1N5377B's axial T-18 leads. A footprint adapter or layout revision is required to maintain mechanical reliability and thermal performance.

What is the surge current rating of SMBG5377BE3/TR13 and how is it defined?

SMBG5377BE3/TR13 is rated for a non-repetitive peak surge current (I_ZSM) of 760 A, defined as the maximum peak value of an 8.3 ms half-sine waveform per Note 4. This rating reflects its ability to absorb high-energy transients - such as those from inductive load switching or lightning-induced surges - without parametric shift or catastrophic failure. The value is validated per JEDEC test method JESD22-A112 and applies only to single-event conditions.