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Microchip Technology SMBG5373B/TR13
- Part No.:
- SMBG5373B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5373B/TR13.pdf
- Description:
- DIODE ZENER 68V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,288
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Product details
Overview
SMBG5373B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 68 V, ±5% tolerance (B suffix), 20 mA test current (IZT), 44 Ω dynamic impedance (ZZT), and maximum regulator current of 70 mA at 25 °C. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters.
For engineers reviewing the SMBG5373B/TR13 datasheet, SMBG5373B/TR13 pinout, SMBG5373B/TR13 application, or SMBG5373B/TR13 equivalent, this page delivers verified electrical specs, DO-215AA gull-wing package details, JEDEC 1N5373B-compliant performance, thermal derating behavior, and RoHS-compliant matte-tin plating confirmation.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, maintaining stable 68 V regulation across 1–70 mA operating current range. Its 44 Ω dynamic impedance ensures minimal voltage variation under load transients, while the 25 °C/W junction-to-lead thermal resistance supports reliable heat transfer to PCB copper when mounted per recommended footprint.
The SMBG5373B/TR13 uses void-free UL94V-0 epoxy encapsulation and gull-wing leads compatible with standard reflow profiles (260 °C/10 s). Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode, and moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% at 20 mA - defines precise clamping/reference point in feedback or protection circuitry |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - sets maximum continuous DC power handling with adequate heatsinking |
| Dynamic Impedance (ZZT) | 44 Ω at IZT = 20 mA - determines output voltage stability under varying load current |
| Max Regulator Current (IZM) | 70 mA - maximum safe DC current before thermal runaway at rated power |
| Junction Temp Range | −65 to +150 °C - enables operation in extended industrial and automotive under-hood environments |
| Thermal Resistance RθJL | 25 °C/W - quantifies thermal path efficiency from junction to lead, critical for PCB layout thermal design |
| Reverse Leakage (IR) | 0.5 µA at VR = 49 V - confirms low standby power loss in high-impedance bias networks |
Pinout & Package
Package: DO-215AA gull-wing surface-mount package (JEDEC standard), 0.1 g weight, UL94V-0 epoxy body, cathode indicated by band, RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 68 V reference or clamping voltage; must be biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5373B equivalence | Identical electrical characteristics and test methods - enables drop-in replacement in legacy designs |
| Gull-wing lead geometry | Visible solder joints and mechanical strain relief - improves post-reflow inspection and board-level reliability |
| Level 1 moisture sensitivity | No dry pack or baking required before assembly - reduces manufacturing overhead and handling risk |
| High surge current rating | 500 A non-repetitive 8.3 ms half-sine - provides robust transient overvoltage suppression in power rails |
| Low dynamic impedance | 44 Ω at 20 mA - minimizes output voltage deviation during load steps in regulation applications |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output within ±1%. IC Role / Device Role / Timing Role: Precision voltage reference providing error signal to PWM controller via secondary-side shunt regulator. Use Value: 68 V Zener voltage matches TL431-based reference design margin, enabling direct substitution without resistor recalibration. | Use Scenario: Placed across 60 V battery bus in solar charge controller to limit voltage spikes during load dump events. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing transient energy above 68 V threshold. Use Value: 500 A surge rating handles ISO 7637-2 Pulse 5a stress without degradation, validated per IEC 61000-4-5. |
| Programmable Reference Generator | Automotive ECU Voltage Monitor |
Use Scenario: Paired with DAC and op-amp in lab-grade programmable power supply to generate adjustable 10–70 V reference outputs. IC Role / Device Role / Timing Role: Stable Zener element establishing upper rail for precision voltage divider network. Use Value: 44 Ω dynamic impedance ensures <0.5% output drift across 5–70 mA current range, meeting 16-bit DAC resolution requirements. | Use Scenario: Monitoring 12 V vehicle battery rail in engine control unit; triggers fault flag if voltage exceeds safe threshold. IC Role / Device Role / Timing Role: Zener-based comparator input reference set to 15.5 V using resistive divider from 68 V device. Use Value: −65 to +150 °C operating range ensures reliable function across cold-crank to under-hood thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; same ±5% tolerance | Requires through-hole PCB assembly; unsuitable for high-density SMT layouts | Select when legacy through-hole production or manual prototyping is required |
| SMBJ5373B | DO-214AA J-bend package; identical electrical specs; same RoHS-compliant matte-tin finish | Different footprint and solder joint geometry; slightly higher RθJA (100 °C/W vs. 90 °C/W) | Select when existing DO-214AA land pattern is standardized and thermal margin permits |
Compared with 1N5373B and SMBJ5373B, the SMBG5373B/TR13 offers gull-wing visibility for automated optical inspection, lower RθJL (25 vs. 30 °C/W), and compatibility with fine-pitch SMT lines - making it optimal for new industrial power designs requiring traceability and reflow yield.
Availability
SMBG5373B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery management systems, and programmable laboratory equipment requiring stable component supply, full RoHS compliance, and JEDEC-standard Zener performance.
Supply support for SMBG5373B/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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The SMBG53xxB series was designed specifically for surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding power systems - delivering JEDEC-verified performance in a gull-wing DO-215AA package.
FAQ
What is the Zener voltage tolerance and test current for SMBG5373B/TR13?
The SMBG5373B/TR13 has a ±5% Zener voltage tolerance (denoted by the "B" suffix) and is specified at a test current (IZT) of 20 mA. Its nominal breakdown voltage is 68 V, meaning the actual measured VZ falls between 64.6 V and 71.4 V when biased at 20 mA at 25 °C. This tolerance and test condition are confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0246-1 datasheet.
Does SMBG5373B/TR13 meet RoHS requirements?
Yes, SMBG5373B/TR13 is RoHS compliant, featuring annealed matte-tin plating per the "e3" marking convention referenced in the nomenclature block. The device meets EU Directive 2011/65/EU and is manufactured without lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE. This is explicitly stated in the Features section and Mechanical/Packaging description of the official Microsemi datasheet.
What is the maximum surge current rating for SMBG5373B/TR13?
The SMBG5373B/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 500 A for an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table. This rating reflects its capability to absorb transient overvoltage events such as load dump or inductive switching spikes without failure, provided the surge occurs infrequently and within thermal limits.
How does the thermal resistance of SMBG5373B/TR13 affect PCB layout?
The SMBG5373B/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W and junction-to-ambient (RθJA) of 90 °C/W when mounted on FR4 with the recommended footprint. To maintain safe junction temperature below 150 °C at full 5 W dissipation, designers must provide adequate copper area (≥0.320″ × 0.085″ pad per lead) and consider thermal vias - especially since RθJA rises significantly without heatsinking.
Is SMBG5373B/TR13 a direct replacement for 1N5373B?
Yes, SMBG5373B/TR13 is electrically equivalent to 1N5373B per Microsemi documentation, sharing identical VZ, IZT, ZZT, IZM, and IR specifications. However, it is not pin-compatible due to differing packages (DO-215AA gull-wing vs. axial T-18). Replacement requires PCB redesign but preserves circuit functionality and performance in new SMT-based designs.
SMBG5373B/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:
- ±5%
- 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)
SMBG5373B/TR13 FAQ
1.How can I place an order for SMBG5373B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5373B/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 SMBG5373B/TR13 reliable?
The price and inventory of SMBG5373B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5373B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5373B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5373B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5373B/TR13?
SMBG5373B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5373B/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 SMBG5373B/TR13?
For technical support, including SMBG5373B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5373B/TR13 requirements.
6.How does Aetrix verify that SMBG5373B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5373B/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 SMBG5373B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5373B/TR13?
All SMBG5373B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5373B/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 SMBG5373B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5373B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5373B/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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