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Microchip Technology SMBG5385B/TR13
- Part No.:
- SMBG5385B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5385B/TR13.pdf
- Description:
- DIODE ZENER 170V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,389
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Product details
Overview
SMBG5385B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 170 V, ±5% tolerance (B suffix), 8.0 mA test current (IZT), 380 Ω dynamic impedance (ZZT), and maximum regulator current of 28 mA - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5385B/TR13 datasheet, SMBG5385B/TR13 pinout, SMBG5385B/TR13 application, or SMBG5385B/TR13 equivalent, key selection criteria include Zener voltage accuracy at IZT, thermal resistance (RθJL = 25 °C/W), surge current rating (IZSM = 1750 A), moisture sensitivity level (MSL Level 1), and DO-215AA gull-wing package compatibility with automated SMT assembly.
Technical Context
This device operates in reverse breakdown to maintain stable reference voltage across wide current (8.0 mA to 28 mA) and temperature (–65 °C to +150 °C) ranges. Its low dynamic impedance (380 Ω at 8.0 mA) ensures minimal voltage variation under load transients.
The DO-215AA gull-wing package enables visible solder joints and supports 5 W power dissipation at lead temperature <25 °C, with thermal resistance junction-to-lead of 25 °C/W and junction-to-ambient of 90 °C/W on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 170 V ±5% at 8.0 mA - defines precise clamping threshold for overvoltage protection and feedback sensing. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via PCB copper pour or heatsink for sustained operation. |
| Dynamic Impedance (ZZT) | 380 Ω at 8.0 mA - determines voltage regulation stability under varying load current. |
| Max Surge Current (IZSM) | 1750 A (8.3 ms half-sine) - withstands transient energy surges without degradation. |
| Junction Temperature Range | –65 °C to +150 °C - supports industrial and automotive under-hood environments. |
| Moisture Sensitivity Level | MSL Level 1 - no dry pack or bake-out required before reflow soldering. |
| Forward Voltage (VF) | 1.2 V at 1.0 A - relevant for reverse-polarity protection or series diode applications. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; operated with banded end positive relative to anode. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side terminal | Connected to circuit ground or lower potential node during Zener operation. |
| Cathode | High-side terminal | Banded end; connected to regulated rail or input side - carries full Zener current and dissipates heat. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N53xxB equivalent | Identical electrical specs and test methods to legacy through-hole 1N5385B - simplifies migration to SMT. |
| Gull-wing lead form | Enables optical inspection of solder joints and reduces tombstoning risk in high-density layouts. |
| Level 1 moisture sensitivity | Eliminates pre-bake requirements and streamlines SMT line integration. |
| High surge current rating | 1750 A peak (8.3 ms) supports robust protection against lightning-induced transients and ESD events. |
| Stable voltage vs. temperature | Minimal VZ drift over –65 °C to +150 °C enables reliable operation in uncontrolled environments. |
Applications
| Switch-Mode Power Supply Feedback | DC Link Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference providing error signal to PWM controller. Use Value: 170 V Zener voltage sets upper limit for auxiliary winding sensing, ensuring stable regulation across line/load variations. |
Use Scenario: Clamps transient spikes on 150–200 V DC bus in motor drives and inverters. IC Role / Device Role / Timing Role: Passive overvoltage protection element absorbing surge energy. Use Value: 1750 A surge rating handles repetitive 8.3 ms transients without parameter shift or failure. |
| Industrial Sensor Signal Conditioning | Telecom Line Interface Protection |
Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop sensors in harsh factory environments. IC Role / Device Role / Timing Role: Low-drift voltage reference source for analog front-end biasing. Use Value: ±5% tolerance and 380 Ω dynamic impedance ensure <±0.5% output voltage variation over 5–25 mA load range. |
Use Scenario: Protects line interface ICs from induced surges on 48 V telecom power feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp in multi-stage protection network. Use Value: MSL Level 1 and gull-wing leads support direct placement near RJ-45 connectors without moisture concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5385B | Through-hole DO-41 package; identical VZ, IZT, ZZT, and IZM specs. | Requires axial-leaded PCB footprint and manual or wave soldering. | Select when legacy through-hole assembly or prototyping with breadboard compatibility is needed. |
| SMBJ5385B | J-bend leads (DO-214AA); same electrical specs but higher RθJA (100 °C/W vs. 90 °C/W). | Lower thermal performance in high-power continuous operation; less visible solder joint. | Choose only if existing DO-214AA footprint reuse is mandatory and power dissipation remains below 3.5 W. |
Compared with SMBG5385B/TR13, 1N5385B offers identical regulation performance in through-hole format, while SMBJ5385B trades thermal efficiency and visual inspection capability for footprint compatibility - making SMBG5385B/TR13 optimal for new SMT designs requiring reliability, manufacturability, and surge resilience.
Availability
SMBG5385B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, DC link protection circuits, industrial sensor interfaces, and telecom line protection requiring stable component supply and long-term obsolescence mitigation.
Supply support for SMBG5385B/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The SMBG53xxB series was designed to deliver JEDEC-standard Zener performance in a gull-wing SMT package for high-density power management and protection applications where thermal reliability and process compatibility are critical.
FAQ
What is the Zener voltage tolerance of SMBG5385B/TR13?
The "B" suffix in SMBG5385B/TR13 denotes ±5% Zener voltage tolerance at 8.0 mA test current. This means the actual VZ falls between 161.5 V and 178.5 V under specified conditions, enabling predictable clamping behavior in overvoltage protection circuits.
Can SMBG5385B/TR13 be used in place of 1N5385B?
Yes - SMBG5385B/TR13 is a surface-mount drop-in replacement for 1N5385B with identical electrical characteristics per Microsemi documentation. It maintains the same 170 V Zener voltage, 8.0 mA IZT, 380 Ω ZZT, and 28 mA IZM, but uses DO-215AA instead of DO-41 packaging.
What is the maximum surge current rating for SMBG5385B/TR13?
SMBG5385B/TR13 has a non-repetitive peak surge current (IZSM) rating of 1750 A for an 8.3 ms half-sine waveform. This value is confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0246-1 datasheet and reflects its suitability for transient voltage suppression.
Is SMBG5385B/TR13 RoHS compliant?
Yes - SMBG5385B/TR13 is offered with RoHS-compliant matte-tin plating (e3 marking), as stated in the Features section and Part Nomenclature block. The device meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity requirements without dry pack.
What thermal resistance values apply to SMBG5385B/TR13?
SMBG5385B/TR13 has RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4 with recommended footprint). These values govern thermal design - for example, at 5 W dissipation, junction temperature rise above ambient is 450 °C without heatsinking, so proper copper area or thermal vias are essential.
SMBG5385B/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):
- 170 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 380 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 122 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)
SMBG5385B/TR13 FAQ
1.How can I place an order for SMBG5385B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5385B/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 SMBG5385B/TR13 reliable?
The price and inventory of SMBG5385B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5385B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5385B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5385B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5385B/TR13?
SMBG5385B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5385B/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 SMBG5385B/TR13?
For technical support, including SMBG5385B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5385B/TR13 requirements.
6.How does Aetrix verify that SMBG5385B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5385B/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 SMBG5385B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5385B/TR13?
All SMBG5385B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5385B/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 SMBG5385B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5385B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5385B/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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