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Microchip Technology SMBG5344B/TR13
- Part No.:
- SMBG5344B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5344B/TR13.pdf
- Description:
- DIODE ZENER 8.2V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,168
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Product details
Overview
SMBG5344B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 8.2 V, ±5% tolerance (B suffix), 150 mA test current (IZT), 1.5 Ω dynamic impedance (ZZT), and 580 mA maximum regulator current (IZM). It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation under broad temperature and current conditions.
For engineers reviewing the SMBG5344B/TR13 datasheet, SMBG5344B/TR13 pinout, SMBG5344B/TR13 application, or SMBG5344B/TR13 equivalent, this part serves as a RoHS-compliant, gull-wing DO-215AA packaged Zener for precision voltage clamping and stabilization where thermal resistance junction-to-lead is critical at 25 °C/W.
Technical Context
This device operates in reverse-biased breakdown mode with a specified Zener voltage of 8.2 V measured at 150 mA (IZT) and 30 °C lead temperature. Its low dynamic impedance (1.5 Ω) ensures minimal voltage variation across load current changes, while its 580 mA IZM rating supports robust surge handling when paired with adequate heat sinking.
The SMBG5344B/TR13 uses a void-free thermosetting epoxy case (UL94V-0), matte-tin plating per MIL-STD-750 method 2026, and cathode polarity indicated by a band. It meets moisture sensitivity Level 1 per J-STD-020B-no dry pack required-and withstands 260 °C soldering for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±5% at 150 mA - defines stable regulation point in feedback or clamp circuits |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management on PCB to sustain full rating |
| Dynamic Impedance (ZZT) | 1.5 Ω at 150 mA - ensures tight voltage regulation under varying load currents |
| Max Regulator Current (IZM) | 580 mA - sets absolute DC current limit before thermal runaway risk |
| Junction Temperature Range | –65 to +150 °C - enables operation in industrial and automotive ambient environments |
| Thermal Resistance (RθJL) | 25 °C/W - indicates efficient heat transfer from junction to lead, critical for reliability |
| Reverse Leakage (IR) | 10 µA max at 5.9 V - confirms low off-state power loss in high-impedance bias networks |
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 |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference node in reverse-bias regulation | Connected to lower-potential side of circuit; forms return path during Zener conduction |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Banded terminal; connected to voltage rail being stabilized or clamped |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5344B equivalent | Identical electrical specs and test methods - enables legacy design reuse without requalification |
| Gull-wing DO-215AA leads | Visible solder joints and automated optical inspection compatibility - improves manufacturing yield |
| Level 1 moisture sensitivity | No dry pack or baking required before SMT assembly - reduces production overhead |
| RoHS-compliant matte-tin plating | MIL-STD-750 solderability verified - ensures reliable reflow joint formation |
| High surge current rating (IZSM) | 10 A peak (8.3 ms half-sine) - protects downstream circuitry against transient overvoltages |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizes error amplifier reference in isolated flyback or forward converter feedback loop. IC Role / Device Role / Timing Role: Zener voltage reference providing precise 8.2 V threshold for optocoupler bias and TL431-type comparators. Use Value: Low 1.5 Ω ZZT minimizes regulation error across line/load transients, improving output accuracy to ±1.5%. |
Use Scenario: Clamps input rail to 8.2 V during ESD or load-dump events in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Passive overvoltage shunt protecting LDO regulators and microcontroller I/O pins. Use Value: 10 A IZSM rating absorbs 8.3 ms surges without degradation, meeting ISO 7637-2 Pulse 1/2a requirements. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Generates stable excitation voltage for precision RTD or strain gauge bridges in data acquisition modules. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source replacing higher-cost IC references where 5% tolerance is acceptable. Use Value: 10 µA IR at 5.9 V ensures negligible current draw from high-impedance bridge arms, preserving measurement linearity. |
Use Scenario: Supplies regulated bias to analog front-end op-amps and ADC drivers in PLC analog input cards. IC Role / Device Role / Timing Role: Local rail stabilizer decoupling noisy 24 V backplane supplies from sensitive signal chains. Use Value: –65 to +150 °C operating range supports extended industrial temperature compliance without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; non-surface-mount form factor | Requires through-hole assembly and board space; unsuitable for high-density SMT layouts | Select when legacy through-hole production or manual prototyping is used |
| SMBJ5344B | DO-214AA J-bend package; same electrical specs but higher RθJA (100 °C/W vs. 90 °C/W); different footprint | Lower thermal performance on FR4; requires larger copper area for equivalent power handling | Select when DO-214AA footprint is standardized and thermal margin permits |
Compared with SMBG5344B/TR13, 1N5344B offers identical regulation performance in axial form but lacks SMT manufacturability, while SMBJ5344B shares electrical behavior but demands greater PCB thermal design effort due to inferior junction-to-ambient thermal resistance.
Availability
SMBG5344B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, RoHS compliance, and gull-wing surface-mount reliability.
Supply support for SMBG5344B/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The SMBG53xxB series targets high-density, low-profile voltage regulation and protection in ruggedized power systems where JEDEC-compatibility, moisture resilience, and surge immunity are mandatory.
FAQ
What is the Zener voltage tolerance for SMBG5344B/TR13?
The 'B' suffix in SMBG5344B/TR13 denotes ±5% Zener voltage tolerance. At 150 mA test current and 30 °C lead temperature, the actual VZ falls between 7.79 V and 8.61 V. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0246-1 datasheet and applies directly to SMBG5344B/TR13-not inferred from family data.
Can SMBG5344B/TR13 be used in place of 1N5344B?
Yes-SMBG5344B/TR13 is explicitly stated as electrically equivalent to 1N5344B with identical electrical characteristics and testing per JEDEC standards. However, SMBG5344B/TR13 uses a DO-215AA gull-wing package versus the axial T-18 of 1N5344B, so PCB layout and assembly process differ. The SMBG5344B/TR13 datasheet confirms this equivalence on page 1.
What is the maximum surge current rating for SMBG5344B/TR13?
SMBG5344B/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 10 A for an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table on page 3. This value is measured under defined transient conditions and supports robust overvoltage clamping in automotive and industrial surge environments.
Is SMBG5344B/TR13 RoHS compliant?
Yes-SMBG5344B/TR13 carries the 'e3' RoHS compliance marking per the nomenclature block on page 2 of the datasheet. It features annealed matte-tin plating and meets EU RoHS Directive 2011/65/EU requirements, with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
What is the thermal resistance junction-to-ambient for SMBG5344B/TR13?
The thermal resistance junction-to-ambient (RθJA) for SMBG5344B/TR13 is 90 °C/W when mounted on a standard FR4 PCB with 1 oz copper and the recommended pad layout (page 5). This value assumes natural convection cooling and is critical for calculating safe operating area under continuous 5 W dissipation.
SMBG5344B/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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.9 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)
SMBG5344B/TR13 FAQ
1.How can I place an order for SMBG5344B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5344B/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 SMBG5344B/TR13 reliable?
The price and inventory of SMBG5344B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5344B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5344B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5344B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5344B/TR13?
SMBG5344B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5344B/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 SMBG5344B/TR13?
For technical support, including SMBG5344B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5344B/TR13 requirements.
6.How does Aetrix verify that SMBG5344B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5344B/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 SMBG5344B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5344B/TR13?
All SMBG5344B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5344B/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 SMBG5344B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5344B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5344B/TR13 Tags
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BZT52C5V6T-7
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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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