My Inquiry
My Account
Microchip Technology SMBG5373A/TR13
- Part No.:
- SMBG5373A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5373A/TR13.pdf
- Description:
- DIODE ZENER 68V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG5373A/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 68 V, ±10% tolerance (A suffix), 20 mA test current (IZT), and 44 Ω dynamic impedance (ZZT) at IZT - used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the SMBG5373A/TR13 datasheet, SMBG5373A/TR13 pinout, SMBG5373A/TR13 application, or SMBG5373A/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current capability (IZSM = 500 A), thermal resistance (RθJA = 90 °C/W), and DO-215AA gull-wing package compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage across wide current ranges (IZK = 1.0 mA to IZM = 70 mA). Its low dynamic impedance (44 Ω) ensures minimal voltage variation under load transients, while the 5 W power rating enables robust operation with adequate heat sinking on FR4 boards.
The SMBG5373A/TR13 features cathode band polarity marking, RoHS-compliant matte-tin plating, and moisture sensitivity level 1 - eliminating dry-pack requirements. It meets JEDEC 1N5373B electrical equivalence and supports EIA-481-1-A tape-and-reel packaging (TR13 suffix denotes 12 mm tape).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±10% - defines regulated output voltage at 20 mA; high-voltage tolerance supports industrial DC bus monitoring. |
| Test Current (IZT) | 20 mA - standard bias point for VZ measurement; ensures stable regulation in feedback networks. |
| Dynamic Impedance (ZZT) | 44 Ω - low small-signal AC impedance improves regulation stability against ripple and transient loads. |
| Max Regulator Current (IZM) | 70 mA - maximum continuous DC current at TL < 25 °C; sets upper limit for safe power dissipation (5 W). |
| Surge Current (IZSM) | 500 A - non-repetitive 8.3 ms half-sine peak; provides robust transient overvoltage clamping. |
| Thermal Resistance (RθJA) | 90 °C/W - junction-to-ambient value on FR4 board; informs heatsinking requirements for sustained 5 W operation. |
| Reverse Leakage (IR) | 0.5 µA @ 49 V - ultra-low leakage at 72% of VZ; critical for low-power reference and standby circuits. |
Pinout & Package
DO-215AA gull-wing surface-mount package with visible solder joints; cathode indicated by band - device operated with banded end positive relative to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current. |
| Cathode | Regulated output node | Banded terminal; supplies stable 68 V reference or clamps voltage above this threshold. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5373B equivalence | Identical electrical specs and test methods - enables drop-in replacement in legacy designs. |
| Gull-wing lead form (DO-215AA) | Enables visual solder joint inspection and high-density placement without J-bend shadowing. |
| Moisture Sensitivity Level 1 | No dry-pack required before reflow - reduces handling cost and simplifies SMT line logistics. |
| RoHS-compliant matte-tin plating | Meets IPC-J-STD-020B solderability standards and eliminates Pb-based assembly constraints. |
| High surge current rating | 500 A (8.3 ms) withstands lightning-induced transients in telecom and industrial power inputs. |
Applications
| Industrial Power Supply Feedback | DC Bus Overvoltage Clamp |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback or forward converter feedback loop. IC Role / Device Role / Timing Role: Zener diode providing precise 68 V reference to optocoupler input or TL431 cathode. Use Value: ±10% VZ tolerance and 44 Ω ZZT ensure <±0.7 V output variation across 5–50 mA load range. |
Use Scenario: Clamps 72 V DC bus during regenerative braking or capacitor charging surges. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing transient energy above 68 V threshold. Use Value: 500 A IZSM rating handles 100–200 V/µs transients without degradation. |
| Programmable Reference Generator | ESD-Safe Voltage Monitor |
Use Scenario: Forms adjustable reference with series resistor and potentiometer in analog sensor interface. IC Role / Device Role / Timing Role: Stable 68 V Zener node enabling 0–68 V programmable threshold detection. Use Value: Low 0.5 µA IR at 49 V minimizes quiescent current in battery-powered monitors. |
Use Scenario: Monitors 60 V rail in automotive body control module for undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: High-reliability voltage reference immune to ESD per MIL-STD-750 Method 1020. Use Value: Non-sensitive ESD behavior ensures no parametric shift after 8 kV contact discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs. | Requires through-hole assembly; unsuitable for fully SMT production lines. | Select when legacy through-hole design or manual prototyping is required. |
| SMBJ5373A | J-bend DO-214AA package; same electrical specs but different thermal profile (RθJA = 80 °C/W). | Better thermal performance on FR4, but J-bend leads hinder optical inspection. | Prefer for thermally constrained layouts where gull-wing visibility is not mandatory. |
Compared with SMBG5373A/TR13, 1N5373B requires PCB redesign for through-hole mounting, while SMBJ5373A offers improved thermal resistance but sacrifices solder-joint visibility - making SMBG5373A/TR13 optimal for automated optical inspection and high-density SMT manufacturing.
Availability
SMBG5373A/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, DC bus protection circuits, and programmable reference generators requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG5373A/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMBG53xxA series was designed for surface-mount voltage regulation in space-constrained, high-surge environments - emphasizing JEDEC compatibility, visual solderability, and moisture-insensitive packaging.
FAQ
What is the Zener voltage tolerance of SMBG5373A/TR13?
The SMBG5373A/TR13 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix in the part number. This means its nominal 68 V Zener voltage is guaranteed between 61.2 V and 74.8 V at 20 mA test current and 25 °C junction temperature. The tolerance directly impacts regulation accuracy in feedback and reference applications.
Does SMBG5373A/TR13 require dry packing before reflow soldering?
No, SMBG5373A/TR13 does not require dry packing prior to reflow. It carries Moisture Sensitivity Level 1 (MSL-1) per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking. This eliminates pre-reflow handling steps and reduces SMT line complexity.
What is the maximum surge current rating for SMBG5373A/TR13?
The SMBG5373A/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 500 A, specified for an 8.3 ms half-sine waveform. This rating enables reliable clamping of high-energy transients in industrial power inputs and motor drive circuits without parametric shift or failure.
How does the DO-215AA package of SMBG5373A/TR13 differ from DO-214AA?
The DO-215AA package uses gull-wing leads for visible solder joints and easier optical inspection, whereas DO-214AA uses J-bend leads that hide solder fillets. SMBG5373A/TR13's DO-215AA also has slightly higher RθJA (90 °C/W vs. 80 °C/W for DO-214AA), reflecting its trade-off between inspectability and thermal performance.
Is SMBG5373A/TR13 RoHS compliant?
Yes, SMBG5373A/TR13 is RoHS compliant, featuring annealed matte-tin plating per J-STD-006. The "e3" designation is implied in Microsemi's standard RoHS-compliant production - confirmed by its compliance with MIL-STD-750 Method 2026 solderability testing and exemption from lead-based finishes.
SMBG5373A/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)
SMBG5373A/TR13 FAQ
1.How can I place an order for SMBG5373A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5373A/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 SMBG5373A/TR13 reliable?
The price and inventory of SMBG5373A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5373A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5373A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5373A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5373A/TR13?
SMBG5373A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5373A/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 SMBG5373A/TR13?
For technical support, including SMBG5373A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5373A/TR13 requirements.
6.How does Aetrix verify that SMBG5373A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5373A/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 SMBG5373A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5373A/TR13?
All SMBG5373A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5373A/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 SMBG5373A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5373A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5373A/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
