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Microchip Technology SMBG5373AE3/TR13
- Part No.:
- SMBG5373AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5373AE3/TR13.pdf
- Description:
- DIODE ZENER 68V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,051
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Product details
Overview
SMBG5373AE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 68 V, ±10% tolerance (A suffix), and maximum Zener current IZM of 500 mA at TL < 25 °C. It uses DO-215AA gull-wing package, features 44 Ω dynamic impedance at 20 mA test current, and is rated for surge current up to 500 A (8.3 ms half-sine). It serves as a precision voltage reference or overvoltage clamp in DC power rails.
For engineers reviewing the SMBG5373AE3/TR13 datasheet, SMBG5373AE3/TR13 pinout, SMBG5373AE3/TR13 application, or SMBG5373AE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge capability (IZSM = 500 A), RoHS-compliant matte-tin plating, and compatibility with automated SMT assembly on FR4 boards.
Technical Context
This device operates in reverse-bias breakdown mode, delivering stable regulation across 1.0 mA to 500 mA operating current range. Its 68 V Zener voltage is specified at 20 mA (IZT), with dynamic impedance measured at 44 Ω under 10% rms ac modulation superimposed on IZT.
The DO-215AA gull-wing package enables visible solder joints and supports thermal dissipation via lead-frame conduction (RθJL = 25 °C/W) and ambient convection (RθJA = 90 °C/W on 1 oz Cu FR4). Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±10% at IZT = 20 mA - defines regulated output voltage under nominal bias |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires heatsinking or layout derating above 25 °C lead temperature |
| Dynamic Impedance (ZZT) | 44 Ω at IZT = 20 mA - determines voltage variation under load current changes |
| Max Surge Current (IZSM) | 500 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Reverse Leakage (IR) | 0.5 µA at VR = 49 V - ensures minimal standby power loss in high-impedance bias networks |
| Junction Temperature Range | –65 to +150 °C - supports operation in industrial and automotive under-hood environments |
| Thermal Resistance (RθJL) | 25 °C/W - enables direct thermal path from junction to PCB copper via leads |
Pinout & Package
DO-215AA gull-wing surface-mount package with two terminals: cathode (banded end) and anode. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required prior to reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Positive terminal during Zener operation | Connected to higher-potential node; reverse-biased to achieve breakdown regulation |
| Anode | Negative terminal during Zener operation | Connected to lower-potential node (e.g., ground or return rail); completes bias path |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | e3 suffix confirms lead-free finish compliant with JEDEC J-STD-020B Level 1 handling |
| Gull-wing lead geometry | Enables visual solder-joint inspection and reduces tombstoning risk in reflow |
| JEDEC 1N53xxB equivalent | Direct functional and electrical replacement for legacy through-hole 1N5373B |
| High surge current rating | 500 A non-repetitive surge capacity protects downstream circuitry from transients |
| Low dynamic impedance | 44 Ω at 20 mA ensures tight voltage regulation under varying load conditions |
Applications
| Industrial Power Supply Clamp | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Clamping 72 V battery transients in 24 V commercial vehicle systems. IC Role / Device Role / Timing Role: Standalone Zener clamping element placed across DC input rail. Use Value: Limits voltage spikes to ≤75 V using 500 A surge rating and 68 V nominal breakdown. |
Use Scenario: Providing stable 68 V reference for analog sensor excitation in engine control units. IC Role / Device Role / Timing Role: Precision shunt reference in low-current bias network. Use Value: Maintains ±10% regulation over –40 to +125 °C with 0.5 µA leakage at 49 V. |
| Telecom DC-DC Converter Feedback | Test Equipment Overvoltage Protection |
Use Scenario: Secondary-side voltage sensing in isolated 48 V telecom power supplies. IC Role / Device Role / Timing Role: Zener-based feedback divider top element in optocoupler-coupled loop. Use Value: Enables accurate 68 V threshold detection with 44 Ω ZZT minimizing loop gain error. |
Use Scenario: Protecting DMM input stages against accidental 100 V+ connections. IC Role / Device Role / Timing Role: Front-end shunt limiter before precision attenuator network. Use Value: Activates at 68 V with fast response (<100 ns) and survives repeated 500 A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | Same 68 V ±10%, 5 W rating, but axial DO-204AL (T-18) package; no RoHS e3 marking | Requires through-hole assembly; not suitable for high-density SMT layouts | Select when legacy board redesign is impractical or manual assembly is preferred |
| SMBJ5373B | Identical electrical specs but DO-214AA (J-bend) package; RθJA = 90 °C/W same, but RθJL not specified | Lower profile than SMBG but less visible solder joint; different footprint and reflow profile | Select when existing DO-214AA footprint is fixed and gull-wing inspection is not required |
Compared with SMBG5373AE3/TR13, 1N5373B offers identical regulation but mandates through-hole assembly, while SMBJ5373B retains SMT compatibility with altered mechanical form factor and unverified thermal conduction path to lead.
Availability
SMBG5373AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply clamp, automotive ECU voltage reference, and telecom DC-DC converter feedback requiring stable component supply and full RoHS compliance.
Supply support for SMBG5373AE3/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 SMBG53xx series targets surface-mount Zener regulation in space-constrained, high-surge environments where gull-wing visibility and JEDEC-compatibility are critical.
FAQ
What is the Zener voltage tolerance for SMBG5373AE3/TR13?
The 'A' suffix in SMBG5373AE3/TR13 specifies ±10% Zener voltage tolerance, meaning the actual breakdown voltage falls between 61.2 V and 74.8 V when measured at 20 mA and 25 °C. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range of –65 to +150 °C.
Does SMBG5373AE3/TR13 require dry packing before reflow soldering?
No, SMBG5373AE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ambient conditions without dry packing. The DO-215AA package uses void-free epoxy meeting UL94V-0 and does not absorb sufficient moisture to cause popcorning during standard reflow profiles.
What is the maximum continuous Zener current for SMBG5373AE3/TR13?
The maximum continuous Zener current (IZM) for SMBG5373AE3/TR13 is 500 mA when lead temperature (TL) is maintained below 25 °C. At higher lead temperatures, power must be derated linearly per the curve in Figure 1 of the datasheet, reaching zero dissipation at 150 °C junction temperature.
How does the gull-wing package of SMBG5373AE3/TR13 improve manufacturability?
The gull-wing leads of SMBG5373AE3/TR13 provide self-centering during reflow and enable post-solder optical inspection of each solder joint - a critical advantage over J-bend packages like SMBJ5373B. This geometry reduces tombstoning risk and supports AOI validation in high-reliability production lines.
Is SMBG5373AE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5373AE3/TR13 features RoHS-compliant matte-tin plating (e3 suffix) and is qualified for peak reflow temperatures up to 260 °C for 10 seconds. Its thermosetting epoxy body and lead-frame construction withstand standard JEDEC J-STD-020D lead-free reflow cycles without delamination or parametric shift.
SMBG5373AE3/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):
- 68 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 44 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 49 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)
SMBG5373AE3/TR13 FAQ
1.How can I place an order for SMBG5373AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5373AE3/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 SMBG5373AE3/TR13 reliable?
The price and inventory of SMBG5373AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5373AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5373AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5373AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5373AE3/TR13?
SMBG5373AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5373AE3/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 SMBG5373AE3/TR13?
For technical support, including SMBG5373AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5373AE3/TR13 requirements.
6.How does Aetrix verify that SMBG5373AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5373AE3/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 SMBG5373AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5373AE3/TR13?
All SMBG5373AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5373AE3/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 SMBG5373AE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5373AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5373AE3/TR13 Tags
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MM5Z5V1ST1G
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