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Microchip Technology SMBG5374B/TR13
- Part No.:
- SMBG5374B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5374B/TR13.pdf
- Description:
- DIODE ZENER 75V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,609
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Product details
Overview
SMBG5374B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 75 V, ±5% tolerance (B suffix), 20 mA test current (IZT), and 45 Ω dynamic impedance (ZZT) at IZT. It regulates voltage in power supply rails and overvoltage protection circuits across industrial and telecom power converters.
For engineers reviewing the SMBG5374B/TR13 datasheet, SMBG5374B/TR13 pinout, SMBG5374B/TR13 application, or SMBG5374B/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (620 A), thermal resistance (25 °C/W junction-to-lead), and DO-215AA gull-wing package compatibility with automated SMT assembly.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 75 V nominal Zener voltage is specified at 20 mA (IZT), with dynamic impedance measured at 1 kHz AC modulation superimposed on DC bias.
The SMBG5374B/TR13 uses a void-free thermosetting epoxy case rated UL94V-0, cathode indicated by band, and RoHS-compliant matte-tin plating. Thermal performance relies on junction-to-lead conduction (25 °C/W), not ambient convection (90 °C/W), making it suitable for PCBs with internal copper planes or heatsink pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at 20 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via lead conduction, not ambient air |
| Dynamic Impedance (ZZT) | 45 Ω at 20 mA - low impedance ensures minimal voltage shift under load transients |
| Max Surge Current (IZSM) | 620 A (8.3 ms half-sine) - withstands lightning-induced or ESD-related surges |
| Junction Temp Range | –65 to +150 °C - supports operation in extended industrial environments |
| Reverse Leakage (IR) | 0.5 µA at 54 V - negligible standby current in high-impedance sensing nodes |
| Thermal Resistance (RθJL) | 25 °C/W - enables direct thermal path to PCB copper or metal-core substrate |
Pinout & Package
DO-215AA gull-wing surface-mount package with two terminals: anode and cathode. Cathode identified by molded band; device operated with banded end positive relative to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown reference terminal | Connected to regulated rail or protection node; voltage clamped to 75 V when reverse biased |
| Anode | Reference return | Connected to ground or lower-potential node; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5374B equivalent | Direct functional replacement for legacy axial 1N5374B with identical electrical specs and test methods |
| Gull-wing lead form | Enables visual solder joint inspection and reliable reflow attachment on FR4 boards |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| High surge current capability | 620 A non-repetitive peak withstand - protects downstream circuitry from transient overvoltages |
| RoHS-compliant matte-tin plating | Meets IPC-J-STD-020B and EU RoHS directives without compromising solderability |
Applications
| Industrial Power Supply Regulation | Telecom Line Card Overvoltage Protection |
|---|---|
Use Scenario: Stabilizes +75 V bias rail in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt regulator and reference clamp. Use Value: Maintains 75 V ±3.75 V regulation across –40 to +85 °C ambient, enabling accurate 16-bit ADC reference stability. | Use Scenario: Protects Ethernet PHY interface ICs from induced surges on 48 V DC power feeds. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between 48 V rail and ground. Use Value: Clamps surges up to 620 A (8.3 ms) without degradation, preserving PHY IC integrity per GR-1089-CORE. |
| Automotive Body Control Module (BCM) Backup Power | Medical Imaging Detector Bias Supply |
Use Scenario: Provides fail-safe 75 V hold-up voltage during battery dropouts in BCM microcontroller reset circuitry. IC Role / Device Role / Timing Role: Shunt regulator maintaining minimum VCC for brownout detection logic. Use Value: Delivers stable 75 V output with <0.5 µA leakage at 54 V, minimizing quiescent current draw during sleep mode. | Use Scenario: Supplies calibrated bias to avalanche photodiode (APD) arrays in portable X-ray detectors. IC Role / Device Role / Timing Role: Precision voltage reference and noise-filtering element in high-gain analog front-end. Use Value: 45 Ω dynamic impedance minimizes ripple-induced gain variation, supporting sub-1% linearity in photon counting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5374B | Axial-leaded T-18 package; same VZ, IZT, ZZT, and PD specs; no gull-wing geometry | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board redesign is impractical or manual repair is preferred |
| SMBJ5374B | DO-214AA J-bend package; identical electrical specs but higher RθJA (100 °C/W vs. 90 °C/W); same RoHS compliance | Lower thermal efficiency on standard FR4; requires larger pad area for equivalent power handling | Select when existing footprint matches DO-214AA or when J-bend leads simplify pick-and-place tooling |
Compared with 1N5374B and SMBJ5374B, SMBG5374B/TR13 offers optimal thermal conduction (25 °C/W RθJL) and visual solder inspection capability in high-density SMT designs, while maintaining full JEDEC equivalency and surge robustness.
Availability
SMBG5374B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and medical imaging detector bias supplies requiring stable component supply and long-term lifecycle support.
Supply support for SMBG5374B/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-identical Zener performance in surface-mount form, targeting high-density power regulation and transient suppression where axial leads are incompatible with modern SMT manufacturing.
FAQ
What is the Zener voltage tolerance for SMBG5374B/TR13?
The "B" suffix in SMBG5374B/TR13 indicates a ±5% Zener voltage tolerance. At 20 mA test current (IZT), the actual breakdown voltage falls between 71.25 V and 78.75 V. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range of –65 to +150 °C, ensuring predictable clamping behavior in safety-critical applications.
Does SMBG5374B/TR13 require moisture preconditioning before reflow?
No, SMBG5374B/TR13 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and does not require dry packing or baking prior to reflow soldering. The void-free epoxy encapsulation and UL94V-0 rating ensure robust handling in standard SMT environments without humidity-related popcorning risk.
What is the maximum continuous Zener current for SMBG5374B/TR13?
The maximum continuous Zener current (IZM) for SMBG5374B/TR13 is 66.7 mA, calculated using the formula IZM = PD / VZM, where PD = 5.0 W and VZM = 75 V × 1.05 = 78.75 V. This value assumes adequate heat sinking via the leads; derating applies above 25 °C lead temperature per the power derating curve in the datasheet.
How does the DO-215AA package of SMBG5374B/TR13 differ from DO-214AA?
The DO-215AA package used by SMBG5374B/TR13 features gull-wing leads for visible solder joints and lower profile mounting, whereas DO-214AA (used by SMBJ5374B) has J-bend leads. Both share identical electrical characteristics, but DO-215AA provides better thermal conduction (RθJL = 25 °C/W vs. ~30 °C/W for DO-214AA) and improved optical inspection capability in automated AOI systems.
Is SMBG5374B/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5374B/TR13 is qualified for lead-free reflow with a peak solder temperature of 260 °C for 10 seconds, per MIL-STD-750 method 2026. Its RoHS-compliant matte-tin plating ensures reliable wetting and intermetallic formation under standard JEDEC J-STD-020D profiles, including ramp-to-spike and soak profiles used in high-volume SMT lines.
SMBG5374B/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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 54 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)
SMBG5374B/TR13 FAQ
1.How can I place an order for SMBG5374B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5374B/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 SMBG5374B/TR13 reliable?
The price and inventory of SMBG5374B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5374B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5374B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5374B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5374B/TR13?
SMBG5374B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5374B/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 SMBG5374B/TR13?
For technical support, including SMBG5374B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5374B/TR13 requirements.
6.How does Aetrix verify that SMBG5374B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5374B/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 SMBG5374B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5374B/TR13?
All SMBG5374B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5374B/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 SMBG5374B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5374B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5374B/TR13 Tags
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