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Microchip Technology SMBG5344A/TR13
- Part No.:
- SMBG5344A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5344A/TR13.pdf
- Description:
- DIODE ZENER 8.2V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,599
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Product details
Overview
SMBG5344A/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 8.2 V, ±10% tolerance, 150 mA test current (IZT), 1.5 Ω dynamic impedance (ZZT), and DO-215AA gull-wing package. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation under varying load and temperature conditions.
For engineers reviewing the SMBG5344A/TR13 datasheet, SMBG5344A/TR13 pinout, SMBG5344A/TR13 application, or SMBG5344A/TR13 equivalent, key selection criteria include Zener voltage tolerance, maximum regulator current (IZM = 580 mA), thermal resistance (RθJL = 25 °C/W), surge current rating (IZSM = 10 A), and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse breakdown to maintain stable voltage across its terminals over broad current (150 mA IZT to 580 mA IZM) and temperature (-65 °C to +150 °C) ranges. Its low dynamic impedance (1.5 Ω at 150 mA) ensures minimal voltage variation with current changes, critical for precision regulation.
The DO-215AA gull-wing package provides visible solder joints, Level 1 moisture sensitivity (no dry pack required), and thermal performance optimized for FR4 PCBs with recommended footprint-achieving 5.0 W dissipation at lead temperature <25 °C or 1.38 W at ambient 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±10% - defines regulated output voltage at 150 mA; high-end tolerance is 9.02 V for IZM calculation. |
| Test Current (IZT) | 150 mA - operating point where VZ and ZZT are specified; sets baseline bias for stable regulation. |
| Dynamic Impedance (ZZT) | 1.5 Ω - small-signal AC impedance at 150 mA; determines voltage deviation under load transients. |
| Max Regulator Current (IZM) | 580 mA - maximum DC current at rated power; derived as P/VZM = 5.0 W / 9.02 V ≈ 554 mA (rounded to 580 mA per datasheet). |
| Surge Current (IZSM) | 10 A - non-repetitive 8.3 ms half-sine peak; enables transient overvoltage clamping without failure. |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead thermal path; supports high-power operation when leads act as heatsinks. |
| Reverse Leakage (IR) | 10 µA @ 5.9 V - low off-state current ensures minimal power loss in standby or high-impedance bias networks. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode band marking; polarity requires banded end to be positive relative to the opposite terminal during operation. Weight: 0.1 g. Moisture sensitivity level: IPC/JEDEC J-STD-020B Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference/Return Node | Connected to circuit ground or lower-potential rail; forms return path for Zener current. |
| Cathode | Regulated Output Node | Banded terminal; supplies stable 8.2 V reference or clamps voltage to ≤9.02 V under overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5344B equivalence | Identical electrical characteristics and testing to legacy through-hole 1N5344B-enables drop-in SMT upgrade. |
| Gull-wing lead form | Enables visual solder joint inspection and reliable reflow attachment on FR4 PCBs with standard footprint. |
| RoHS-compliant matte-tin plating | Meets environmental compliance requirements without sacrificing solderability or reliability (MIL-STD-750 method 2026). |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints-reduces handling overhead in production. |
| High surge current capability | Withstands 10 A, 8.3 ms surges-protects downstream circuitry from ESD or line transients without derating. |
Applications
| Power Supply Feedback Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in isolated DC-DC converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener reference node defining upper voltage threshold for error amplifier input. Use Value: 1.5 Ω dynamic impedance minimizes output voltage drift across 10–150 mA load variations, maintaining ±1% regulation accuracy. | Use Scenario: Clamping 12 V rail against automotive load-dump transients exceeding 30 V. IC Role / Device Role / Timing Role: Passive shunt element diverting surge current away from sensitive LDOs or microcontrollers. Use Value: 10 A surge rating absorbs 8.3 ms half-sine energy without degradation, preserving system uptime during ISO 7637-2 pulses. |
| Reference Voltage Generation | ESD-Safe Bias Network |
Use Scenario: Providing stable 8.2 V reference for ADC voltage dividers or analog sensor excitation circuits. IC Role / Device Role / Timing Role: Precision voltage source establishing known potential for ratiometric measurements. Use Value: ±10% VZ tolerance and low IR (10 µA @ 5.9 V) ensure predictable divider ratios and negligible quiescent error contribution. | Use Scenario: Biasing high-impedance inputs of RS-485 transceivers in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Low-leakage clamp limiting input voltage to safe levels while avoiding signal distortion. Use Value: Non-sensitive to ESD per MIL-STD-750 method 1020 ensures robustness against contact discharge without external TVS stacking. |
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; higher RθJA (150 °C/W vs. 90 °C/W). | Requires through-hole assembly and larger board area; unsuitable for high-density SMT designs. | Select when legacy through-hole compatibility or manual prototyping is prioritized over board space and thermal performance. |
| SMBJ5344 | DO-214AA J-bend package; same VZ, IZT, ZZT, and IZM; slightly higher RθJA (95 °C/W) and no gull-wing visual inspection benefit. | Compatible with standard SMT pick-and-place but lacks gull-wing solder joint visibility for AOI validation. | Select when existing DO-214AA footprint reuse is required and visual solder inspection is not mandated by quality process. |
Compared with SMBG5344A/TR13, 1N5344B trades SMT efficiency and thermal performance for through-hole simplicity, while SMBJ5344 retains SMT compatibility but sacrifices gull-wing inspection capability and marginally increases thermal resistance-making SMBG5344A/TR13 optimal for high-reliability, high-density, and AOI-validated production.
Availability
SMBG5344A/TR13 is available at Aetrix Electronics and suitable for power supply feedback regulation, overvoltage protection clamping, and reference voltage generation requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant packaging.
Supply support for SMBG5344A/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 transient suppression in space-constrained, thermally demanding environments-emphasizing JEDEC compatibility, visual solder verification, and robust surge handling.
FAQ
What is the Zener voltage tolerance for SMBG5344A/TR13?
The SMBG5344A/TR13 has a Zener voltage tolerance of ±10%, meaning its regulated voltage falls between 7.38 V and 9.02 V at 150 mA test current. This tolerance directly impacts design margins in feedback networks and clamping thresholds-engineers must use the 9.02 V upper limit when calculating maximum regulator current (IZM) or worst-case power dissipation in SMBG5344A/TR13 applications.
How does SMBG5344A/TR13 handle surge events?
SMBG5344A/TR13 supports a non-repetitive peak surge current (IZSM) of 10 A for an 8.3 ms half-sine waveform, enabling it to absorb transient energy without failure. This capability is validated per datasheet Note 4 and makes SMBG5344A/TR13 suitable for automotive load-dump protection and industrial surge suppression where short-duration overvoltages exceed steady-state ratings.
Is SMBG5344A/TR13 RoHS compliant?
Yes, SMBG5344A/TR13 uses RoHS-compliant annealed matte-tin plating on its gull-wing terminals, meeting EU Directive 2011/65/EU requirements. The "A" suffix in the part number denotes ±10% tolerance, while RoHS compliance is confirmed by the e3 marking on the device body per Microsemi's nomenclature guide-ensuring SMBG5344A/TR13 meets environmental standards without compromising solderability or reliability.
What is the thermal resistance of SMBG5344A/TR13, and how does it affect power dissipation?
SMBG5344A/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W and junction-to-ambient (RθJA) of 90 °C/W when mounted on FR4 with the recommended footprint. At lead temperature <25 °C, SMBG5344A/TR13 delivers full 5.0 W; at 25 °C ambient, power drops to 1.38 W-requiring careful thermal design if operating near IZM (580 mA) continuously.
Can SMBG5344A/TR13 replace 1N5344B in existing designs?
Yes, SMBG5344A/TR13 is electrically equivalent to 1N5344B per Microsemi documentation, sharing identical VZ, IZT, ZZT, IZM, and IR specifications. However, the DO-215AA gull-wing package requires PCB footprint revision from axial T-18-so SMBG5344A/TR13 serves as a functional upgrade rather than a drop-in replacement unless layout adaptation is performed.
SMBG5344A/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:
- ±10%
- 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)
SMBG5344A/TR13 FAQ
1.How can I place an order for SMBG5344A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5344A/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 SMBG5344A/TR13 reliable?
The price and inventory of SMBG5344A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5344A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5344A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5344A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5344A/TR13?
SMBG5344A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5344A/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 SMBG5344A/TR13?
For technical support, including SMBG5344A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5344A/TR13 requirements.
6.How does Aetrix verify that SMBG5344A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5344A/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 SMBG5344A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5344A/TR13?
All SMBG5344A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5344A/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 SMBG5344A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5344A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5344A/TR13 Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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