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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology SMBG5388B/TR13

Name: SMBG5388B/TR13
Brand: Microchip Technology
SKU: SMBG5388B/TR13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG5388B/TR13

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG5388B/TR13.pdf

Description:: DIODE ZENER 200V 5W DO214AA

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Product details

Overview

SMBG5388B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 200 V, ±5% tolerance (B suffix), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges, supports surge currents up to 1850 A (8.3 ms half-sine), and operates from –65 °C to +150 °C junction temperature - used in overvoltage protection and precision reference circuits for industrial power supplies.

For engineers reviewing the SMBG5388B/TR13 datasheet, SMBG5388B/TR13 pinout, SMBG5388B/TR13 application, or SMBG5388B/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating, thermal resistance (R_θJL = 25 °C/W), moisture sensitivity level (MSL 1), and RoHS-compliant matte-tin plating.

Technical Context

This device functions as a voltage reference and clamping element in DC power rails, leveraging sharp Zener breakdown at 200 V with dynamic impedance of 480 Ω at I_ZT = 5.0 mA. Its low leakage (I_R ≤ 0.5 µA at V_R = 144 V) ensures minimal standby loss in high-impedance bias networks.

The DO-215AA gull-wing package enables visible solder joints and meets IPC/JEDEC J-STD-020B MSL Level 1, eliminating dry-pack requirements. Thermal performance is specified for FR4 boards with recommended footprint: R_θJA = 90 °C/W and R_θJL = 25 °C/W, supporting stable regulation under transient load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	200 V ±5% at I_ZT = 5.0 mA - defines precise clamping threshold for overvoltage protection circuits.
Power Dissipation (P_D)	5.0 W at T_L < 25 °C - requires heatsinking or layout derating above ambient for sustained operation.
Max Surge Current (I_ZSM)	1850 A (8.3 ms half-sine) - withstands lightning-induced transients in AC/DC front-end stages.
Dynamic Impedance (Z_ZT)	480 Ω at I_ZT = 5.0 mA - determines voltage regulation stability under varying load current.
Reverse Leakage (I_R)	≤0.5 µA at V_R = 144 V - ensures negligible quiescent current in high-impedance reference dividers.
Junction Temp Range	–65 °C to +150 °C - supports operation in automotive under-hood and industrial motor drive environments.
Thermal Resistance	R_θJL = 25 °C/W - enables direct thermal path to PCB copper for efficient heat transfer without external heatsink.

Pinout & Package

DO-215AA gull-wing surface-mount package with cathode band marking; terminals are anode and cathode only. Polarity: banded end is cathode; device operated with cathode positive relative to anode.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (banded end)	High-side terminal in reverse-bias configuration	Connected to protected rail or reference node; clamps voltage when exceeds 200 V.
Anode	Low-side terminal / reference return	Typically tied to ground or common return; completes Zener conduction path during overvoltage events.

Key Features

Feature	Design Value
JEDEC 1N5388B Equivalent	Identical electrical characteristics and test methods - enables drop-in replacement in legacy designs.
Moisture Sensitivity Level	MSL Level 1 per J-STD-020B - no dry pack or baking required before reflow assembly.
RoHS Compliance	Matte-tin plating (e3 suffix implied in TR13 tape-and-reel variant) - meets global environmental compliance mandates.
Surge Withstand Capability	Rated for non-repetitive 1850 A surges - protects downstream circuitry against IEC 61000-4-5 line transients.
Low Dynamic Impedance Drift	Z_ZT = 480 Ω at 5 mA with minimal variation over temperature - maintains voltage reference accuracy in varying thermal environments.

Applications

Industrial Power Supply Protection	Automotive ECU Voltage Clamping
Use Scenario: Protects 24 V and 48 V DC input stages in programmable logic controllers and motor drives from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp transient voltages above 200 V. Use Value: Prevents damage to upstream DC-DC converters and microcontrollers by limiting peak rail voltage to 200 V ±5%.	Use Scenario: Integrated into engine control unit (ECU) power entry modules to suppress alternator load-dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Standalone voltage clamp placed across main 12 V supply rail. Use Value: Absorbs 1850 A surge energy without failure, maintaining system uptime during harsh automotive transients.
High-Voltage Reference Source	Telecom Line Interface Protection
Use Scenario: Provides stable 200 V reference for analog-to-digital converter biasing and high-voltage sensor scaling in test equipment. IC Role / Device Role / Timing Role: Precision Zener reference in feedback divider network of isolated flyback regulators. Use Value: Delivers <0.5 µA leakage and 480 Ω dynamic impedance to minimize reference error and drift over temperature.	Use Scenario: Shields Ethernet PHY and PoE controller ICs on telecom line cards from induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Primary overvoltage protector on DC bias lines feeding transformer-coupled interfaces. Use Value: Activates within nanoseconds at 200 V threshold, diverting >1 kA surge current away from sensitive interface ICs.

Industrial Power Supply Protection

Automotive ECU Voltage Clamping

Use Scenario: Protects 24 V and 48 V DC input stages in programmable logic controllers and motor drives from load dump and inductive switching spikes.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp transient voltages above 200 V.

Use Value: Prevents damage to upstream DC-DC converters and microcontrollers by limiting peak rail voltage to 200 V ±5%.

Use Scenario: Integrated into engine control unit (ECU) power entry modules to suppress alternator load-dump transients per ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: Standalone voltage clamp placed across main 12 V supply rail.

Use Value: Absorbs 1850 A surge energy without failure, maintaining system uptime during harsh automotive transients.

High-Voltage Reference Source

Telecom Line Interface Protection

Use Scenario: Provides stable 200 V reference for analog-to-digital converter biasing and high-voltage sensor scaling in test equipment.

IC Role / Device Role / Timing Role: Precision Zener reference in feedback divider network of isolated flyback regulators.

Use Value: Delivers <0.5 µA leakage and 480 Ω dynamic impedance to minimize reference error and drift over temperature.

Use Scenario: Shields Ethernet PHY and PoE controller ICs on telecom line cards from induced surges on RJ45 ports.

IC Role / Device Role / Timing Role: Primary overvoltage protector on DC bias lines feeding transformer-coupled interfaces.

Use Value: Activates within nanoseconds at 200 V threshold, diverting >1 kA surge current away from sensitive interface ICs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5388B	Axial-leaded T-18 package; identical V_Z, I_ZM, and I_ZSM; R_θJA = 125 °C/W (higher thermal resistance).	Requires through-hole mounting and larger board area; unsuitable for high-density SMT layouts.	Select 1N5388B only when axial leaded form factor is mandated or thermal constraints allow higher ambient rise.
SMBJ5388	J-bend DO-214AA package; same V_Z and power rating but lower I_ZSM = 1500 A; R_θJA = 100 °C/W.	Compatible with standard SMT pick-and-place but offers reduced surge margin and less efficient thermal coupling than gull-wing SMBG.	Choose SMBJ5388 where existing DO-214AA footprint exists and 1500 A surge rating suffices.

Compared with 1N5388B and SMBJ5388, SMBG5388B/TR13 delivers superior thermal performance (R_θJL = 25 °C/W), visible solder joints for AOI inspection, and highest surge rating (1850 A) in a compact gull-wing SMT package - making it optimal for space-constrained, high-reliability industrial and automotive applications.

Availability

SMBG5388B/TR13 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive ECU clamping, and high-voltage reference design requiring stable component supply and full traceability.

Supply support for SMBG5388B/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, industrial, and communications markets.

The SMBG53xxB series targets robust voltage regulation and transient suppression in harsh-environment power systems, emphasizing surge resilience, MSL Level 1 handling, and JEDEC-compatibility for seamless integration into legacy and new designs.

FAQ

What is the Zener voltage tolerance for SMBG5388B/TR13?

The "B" suffix in SMBG5388B/TR13 specifies a ±5% Zener voltage tolerance. At the rated test current of 5.0 mA, the actual breakdown voltage falls between 190 V and 210 V. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range of –65 °C to +150 °C. The SMBG5388B/TR13 datasheet confirms this value in the Electrical Characteristics table on page 3.

Does SMBG5388B/TR13 require dry packing before reflow soldering?

No, SMBG5388B/TR13 does not require dry packing. It is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life at ≤30 °C/60% RH and can be reflowed directly without baking. This is confirmed in the Mechanical and Packaging section of the Microsemi datasheet (T4-LDS-0246-1, Rev. 1), which states "moisture classification is 'Level 1' with no dry pack required."

What is the maximum surge current rating for SMBG5388B/TR13?

SMBG5388B/TR13 is rated for a non-repetitive peak surge current (I_ZSM) of 1850 A, defined as a single 8.3 ms half-sine waveform. This value is measured under standardized test conditions and appears in the Electrical Characteristics table on page 3 of the official Microsemi datasheet. It reflects the device's capability to absorb transient energy without parametric shift or catastrophic failure.

How does the DO-215AA package of SMBG5388B/TR13 differ from DO-214AA?

The DO-215AA gull-wing package of SMBG5388B/TR13 features outward-bent leads enabling visual solder joint inspection and lower thermal resistance (R_θJL = 25 °C/W), while DO-214AA uses J-bend leads with higher R_θJL ≈ 30 °C/W. Both are surface-mount, but DO-215AA provides better thermal transfer to PCB copper and supports automated optical inspection - critical for high-reliability manufacturing of SMBG5388B/TR13.

Is SMBG5388B/TR13 RoHS compliant?

Yes, SMBG5388B/TR13 is RoHS compliant. The "TR13" suffix indicates tape-and-reel packaging, and Microsemi's documentation confirms RoHS-compliant matte-tin plating for all SMBG53xxB devices unless otherwise marked. This is stated in the Features section ("RoHS compliant versions available") and Mechanical and Packaging section ("RoHS compliant annealed matte-tin plating") of the T4-LDS-0246-1 datasheet.

SMBG5388B/TR13 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-215AA, SMB Gull Wing

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 200 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 480 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 144 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMBG)

SMBG5388B/TR13 FAQ

1.How can I place an order for SMBG5388B/TR13 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG5388B/TR13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMBG5388B/TR13 reliable?

The price and inventory of SMBG5388B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5388B/TR13 is usually 5 days.

3.What payment methods are accepted for SMBG5388B/TR13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5388B/TR13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG5388B/TR13?

SMBG5388B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG5388B/TR13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMBG5388B/TR13?

For technical support, including SMBG5388B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5388B/TR13 requirements.

6.How does Aetrix verify that SMBG5388B/TR13 is sourced from the original manufacturer or authorized distributors?

All SMBG5388B/TR13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBG5388B/TR13 meets industry standards.

7.What is the process for return or replacement of SMBG5388B/TR13?

All SMBG5388B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5388B/TR13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMBG5388B/TR13 part is unused and in its original packaging.

Return procedure for SMBG5388B/TR13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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