My Inquiry
My Account
Microchip Technology SMBG5343CE3/TR13
- Part No.:
- SMBG5343CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5343CE3/TR13.pdf
- Description:
- DIODE ZENER 7.5V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,536
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG5343CE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 7.5 V, ±2% tolerance (C suffix), 175 mA test current (IZT), and 630 Ω dynamic impedance (ZZT) at IZT. It operates in the DO-215AA gull-wing package and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the SMBG5343CE3/TR13 datasheet, SMBG5343CE3/TR13 pinout, SMBG5343CE3/TR13 application, or SMBG5343CE3/TR13 equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant plating details, and validated alternatives for industrial power management and analog reference designs.
Technical Context
This device functions as a two-terminal voltage regulator diode operating in reverse-biased breakdown mode. Its Zener voltage is specified at 7.5 V ±2% under 175 mA DC test current (IZT), with dynamic impedance of 630 Ω measured at 10% rms AC modulation superimposed on IZT.
Thermal performance is defined by junction-to-lead resistance of 25 °C/W and junction-to-ambient resistance of 90 °C/W when mounted on FR4 with recommended footprint. Maximum power dissipation is 5.0 W at lead temperature <25 °C, derating linearly above that point per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±2% at 175 mA - defines stable regulation point for feedback or clamping |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal design attention for sustained operation |
| Dynamic Impedance (ZZT) | 630 Ω at IZT - determines output voltage stability under load current variation |
| Maximum Regulator Current (IZM) | 630 mA - maximum continuous DC current before exceeding 5 W rating at VZ |
| Reverse Leakage (IR) | 10 µA max at 5.4 V - ensures low standby power loss in high-impedance bias networks |
| Junction Temperature Range | –65 to +150 °C - supports operation in extended industrial and automotive environments |
| Surge Current (IZSM) | 10.7 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; anode and cathode terminals are formed as symmetrical gull-wing leads suitable for visual solder inspection and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in Zener shunt regulator configuration |
| Cathode | Reverse breakdown terminal / high-side connection | Banded end; connected to regulated rail or input node requiring voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5343B equivalent | Fully compatible with legacy 1N5343B designs-identical electrical specs and test methods |
| RoHS-compliant matte-tin plating | e3 suffix confirms annealed matte-tin finish compliant with IPC-J-STD-020B Level 1 moisture sensitivity |
| Gull-wing lead form | Enables AOI visibility and reliable reflow solder joint formation on FR4 PCBs |
| High surge current capability | 10.7 A non-repetitive surge rating allows use in transient-prone power rails without external TVS |
| Low voltage tolerance | ±2% (C suffix) enables tighter regulation than ±5% (B) or ±10% (A) variants in precision references |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Provides stable 7.5 V reference for optocoupler-based feedback in isolated DC/DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input in secondary-side control loop. Use Value: ±2% tolerance and 630 Ω dynamic impedance minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Supplies precise bias voltage to analog front-end circuitry in pressure or temperature transducers. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ADC reference buffers and signal conditioning stages. Use Value: 10 µA leakage at 5.4 V ensures minimal loading on high-impedance sensor bridges and maintains measurement accuracy. |
| Overvoltage Clamp for MCU I/O | Programmable Threshold Detector |
Use Scenario: Protects 5 V or 3.3 V microcontroller GPIO pins against ESD and transient overvoltage. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to ≤7.5 V during surge events. Use Value: 10.7 A surge rating and 150 °C max junction temperature allow robust protection without sacrificial fuse dependency. |
Use Scenario: Sets threshold for comparator-based undervoltage lockout (UVLO) or brown-out detection. IC Role / Device Role / Timing Role: Precision voltage threshold element defining trip point for system reset logic. Use Value: Tight ±2% tolerance ensures consistent UVLO activation across production units and temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Through-hole axial T-18 package; identical VZ, IZT, ZZT, and IZM specs; non-RoHS Sn/Pb plating | Requires through-hole assembly and board space; unsuitable for high-density SMT layouts | Select when legacy through-hole manufacturing or manual prototyping is required |
| SMBJ5343 | Same DO-214AA J-bend package; identical electrical specs; RoHS-compliant matte-tin plating; same e3 suffix option | Lower profile but different lead geometry-requires PCB footprint revision and reflow profile adjustment | Choose when DO-214AA compatibility or existing J-bend layout reuse is prioritized over gull-wing AOI advantage |
Compared with SMBG5343CE3/TR13, 1N5343B offers identical regulation performance but mandates through-hole assembly, while SMBJ5343 matches SMT requirements but changes mechanical mounting and thermal path-neither is pin-compatible, and both require layout verification for thermal and solder joint reliability.
Availability
SMBG5343CE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply, RoHS compliance, and high-surge resilience.
Supply support for SMBG5343CE3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The SMBG53xx series was designed specifically for surface-mount voltage regulation and clamping in space-constrained, thermally demanding power systems where JEDEC-compatibility and moisture-insensitive packaging are critical.
FAQ
What is the Zener voltage tolerance for SMBG5343CE3/TR13?
The "C" suffix in SMBG5343CE3/TR13 denotes a ±2% Zener voltage tolerance, meaning its breakdown voltage is guaranteed between 7.35 V and 7.65 V at 175 mA test current and 25 °C. This tighter tolerance supports higher-accuracy regulation compared to ±5% (B) or ±10% (A) variants, making SMBG5343CE3/TR13 suitable for precision reference applications where voltage drift must be minimized across temperature and current variations.
Is SMBG5343CE3/TR13 RoHS compliant?
Yes, SMBG5343CE3/TR13 is RoHS compliant, confirmed by the "e3" suffix indicating annealed matte-tin plating per J-STD-020B Level 1 moisture sensitivity classification. No dry pack is required, and the device meets lead-free soldering requirements up to 260 °C for 10 seconds. The RoHS compliance applies to both material content and plating process, verified in Microsemi's T4-LDS-0246-1 datasheet.
What is the maximum continuous Zener current for SMBG5343CE3/TR13?
The maximum continuous Zener current (IZM) for SMBG5343CE3/TR13 is 630 mA, calculated from its 5.0 W power rating and upper-limit Zener voltage (7.5 V × 1.02 = 7.65 V). This value assumes proper thermal management-specifically, lead temperature maintained below 25 °C. At higher ambient temperatures or on standard FR4, derating per Figure 1 applies, reducing usable IZM to maintain safe junction temperature.
How does SMBG5343CE3/TR13 compare to SMBJ5343 in terms of package and thermal performance?
SMBG5343CE3/TR13 uses the DO-215AA gull-wing package with 25 °C/W junction-to-lead thermal resistance, while SMBJ5343 uses DO-214AA J-bend with higher junction-to-lead resistance (typically ~30–35 °C/W). The gull-wing leads of SMBG5343CE3/TR13 provide better heat conduction to PCB copper and enable visible solder joints. Both share identical electrical specs, but thermal design and reflow profile must be re-validated when substituting between them.
Can SMBG5343CE3/TR13 replace 1N5343B in existing designs?
SMBG5343CE3/TR13 is electrically equivalent to 1N5343B per Microsemi documentation, matching VZ, IZT, ZZT, IZM, and surge ratings. However, it is not a drop-in replacement due to package differences: SMBG5343CE3/TR13 is surface-mount DO-215AA, whereas 1N5343B is through-hole T-18. PCB redesign and assembly process changes are required-though schematic-level functionality remains identical in regulation and protection roles.
SMBG5343CE3/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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.4 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)
SMBG5343CE3/TR13 FAQ
1.How can I place an order for SMBG5343CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5343CE3/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 SMBG5343CE3/TR13 reliable?
The price and inventory of SMBG5343CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5343CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5343CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5343CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5343CE3/TR13?
SMBG5343CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5343CE3/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 SMBG5343CE3/TR13?
For technical support, including SMBG5343CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5343CE3/TR13 requirements.
6.How does Aetrix verify that SMBG5343CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5343CE3/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 SMBG5343CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5343CE3/TR13?
All SMBG5343CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5343CE3/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 SMBG5343CE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5343CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5343CE3/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…
