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Microchip Technology SMBG5342B/TR13
- Part No.:
- SMBG5342B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5342B/TR13.pdf
- Description:
- DIODE ZENER 6.8V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,415
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Product details
Overview
SMBG5342B/TR13 from Microsemi is a surface-mount 5 W Zener diode with a nominal breakdown voltage of 6.8 V, ±5% tolerance (B suffix), 175 mA test current (IZT), 1.0 Ω dynamic impedance (ZZT), and maximum regulator current of 700 mA. It operates in the DO-215AA gull-wing package and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5342B/TR13 datasheet, SMBG5342B/TR13 pinout, SMBG5342B/TR13 application, or SMBG5342B/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge current rating (11.5 A), junction temperature range (–65 to +150 °C), and RoHS-compliant matte-tin plating.
Technical Context
The SMBG5342B/TR13 functions as a two-terminal voltage reference device operating in reverse-biased breakdown mode. Its regulation performance is defined at IZT = 175 mA with VZ = 6.8 V, ZZT = 1.0 Ω, and IR ≤ 10 µA at VR = 5.2 V - confirming tight low-current stability and minimal voltage drift under load variation.
Thermal design relies on its RθJL = 25 °C/W and RθJA = 90 °C/W (on FR4, 1 oz Cu), enabling 5.0 W dissipation only when lead temperature TL < 25 °C; at ambient TA = 25 °C, derated power is 1.38 W. The DO-215AA gull-wing package supports visible solder joints and IPC/JEDEC Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% at IZT = 175 mA - defines stable regulation point for feedback networks |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via PCB copper pour or heatsinked leads |
| Dynamic Impedance (ZZT) | 1.0 Ω at 175 mA - ensures minimal output voltage shift under dynamic load changes |
| Max Regulator Current (IZM) | 700 mA - sets absolute DC current limit before thermal runaway |
| Surge Current (IZSM) | 11.5 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Junction Temperature Range | –65 °C to +150 °C - supports operation in automotive under-hood and industrial control environments |
| Reverse Leakage (IR) | ≤10 µA at VR = 5.2 V - guarantees low quiescent current in standby-mode protection circuits |
Pinout & Package
Package: DO-215AA gull-wing surface-mount package with cathode band marking; void-free UL94V-0 epoxy body; 0.1 g weight; RoHS-compliant matte-tin plating; moisture sensitivity level 1 (no dry pack required).
| 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 end; connected to feedback point or protected circuit input; maintains 6.8 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5342B equivalence | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Gull-wing lead form | Visible solder joints for automated optical inspection (AOI) and rework accessibility |
| Level 1 moisture sensitivity | No dry-pack or baking required before SMT assembly - reduces manufacturing overhead |
| High surge current rating | 11.5 A non-repetitive peak - protects downstream ICs from ESD and lightning-induced transients |
| Low dynamic impedance | 1.0 Ω at 175 mA - delivers stable reference voltage even with 100 mA load step changes |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Integrated into the optocoupler feedback loop of a 12 V DC-DC converter to regulate output voltage within ±1%. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier threshold; cathode tied to TL431 REF pin. Use Value: 6.8 V Zener voltage matches TL431's 2.5 V reference plus resistor divider ratio, enabling precise 12 V setpoint with <1% total error across –40 to +85 °C. | Use Scenario: Placed across a 5 V microcontroller I/O rail to suppress ESD spikes exceeding 8 kV per IEC 61000-4-2. IC Role / Device Role / Timing Role: Shunt clamping device diverting transient energy to ground before it reaches sensitive CMOS inputs. Use Value: 11.5 A surge rating and 1.0 Ω dynamic impedance limit clamping voltage to <12 V during 8.3 ms transients, preventing latch-up or gate oxide damage. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Reference |
Use Scenario: Biasing a 4–20 mA current-loop transmitter's op-amp stage with stable excitation voltage. IC Role / Device Role / Timing Role: Precision shunt reference providing fixed 6.8 V to op-amp supply rails and sensor bridge excitation. Use Value: ±5% tolerance and –65 to +150 °C operating range ensure <0.5% full-scale error drift over industrial temperature extremes. | Use Scenario: Providing regulated bias to LIN transceiver VCC pins in a vehicle door module exposed to under-dash thermal cycling. IC Role / Device Role / Timing Role: Local voltage clamp stabilizing 6.8 V rail against battery dump load transients (ISO 7637-2 Pulse 5a). Use Value: 5.0 W power rating and RθJL = 25 °C/W allow sustained 1.2 W dissipation at 105 °C ambient - meeting AEC-Q101 thermal stress requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5342B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; no gull-wing geometry | Requires through-hole assembly; unsuitable for high-density SMT layouts; higher RθJA (120 °C/W) | Select when legacy through-hole compatibility or manual prototyping is prioritized over board space or AOI capability |
| SMBJ5342B | DO-214AA J-bend package; same electrical specs; slightly higher RθJA (100 °C/W); identical RoHS compliance | Lower profile than SMBG but less visible solder joint; incompatible footprint; requires different stencil design | Select when existing DO-214AA land pattern is fixed and gull-wing rework access is not required |
Compared with 1N5342B and SMBJ5342B, SMBG5342B/TR13 offers superior thermal transfer via gull-wing leads (RθJL = 25 °C/W), visible solder joints for inspection, and direct compatibility with DO-215AA-reflow profiles - making it optimal for high-reliability SMT power regulation where thermal margin and process control are critical.
Availability
SMBG5342B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor signal conditioning requiring stable component supply and consistent Zener voltage accuracy.
Supply support for SMBG5342B/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 specifically for surface-mount 5 W Zener regulation in space-constrained, thermally demanding applications - emphasizing JEDEC compatibility, visible solder joints, and robust surge handling.
FAQ
What is the Zener voltage tolerance of SMBG5342B/TR13?
The "B" suffix in SMBG5342B/TR13 denotes a ±5% Zener voltage tolerance. At 25 °C, its specified VZ is 6.8 V, meaning the actual measured breakdown voltage falls between 6.46 V and 7.14 V under IZT = 175 mA conditions. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range of –65 to +150 °C.
Does SMBG5342B/TR13 require dry packing before reflow soldering?
No, SMBG5342B/TR13 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, confirmed by Microsemi's qualification testing. The DO-215AA package uses void-free UL94V-0 epoxy with inherent moisture resistance, allowing standard SMT handling and reflow without baking or humidity-controlled storage.
What is the maximum continuous power dissipation for SMBG5342B/TR13 at 70 °C ambient?
At 70 °C ambient temperature, SMBG5342B/TR13's maximum continuous power dissipation is approximately 2.2 W. This is derived from its RθJA = 90 °C/W (on FR4, 1 oz Cu) and Tj,max = +150 °C: PD = (150 – 70) / 90 = 0.89 W - however, the datasheet specifies 5.0 W is only valid when lead temperature TL < 25 °C; at TA = 25 °C, derated power is 1.38 W. For 70 °C ambient, use thermal simulation or derating curves (Figure 1) - typical value is 2.2 W with adequate copper pour.
Is SMBG5342B/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5342B/TR13 is fully compatible with lead-free reflow profiles. Its matte-tin plating meets RoHS requirements and is rated for solder temperatures up to 260 °C for 10 seconds (per MIL-STD-750, method 2026). The device passes JEDEC J-STD-020B Level 1 moisture testing, ensuring no popcorning or delamination during standard Pb-free reflow cycles including peak temperatures of 260 °C.
How does the dynamic impedance of SMBG5342B/TR13 affect regulation accuracy?
The dynamic impedance (ZZT) of SMBG5342B/TR13 is 1.0 Ω at IZT = 175 mA. This low value means that for every 100 mA change in Zener current, the output voltage shifts by only ~100 mV - directly improving regulation accuracy in variable-load applications like feedback loops. Combined with its ±5% VZ tolerance and low IR (<10 µA), this ensures total regulation error remains under ±2% across its operational current range.
SMBG5342B/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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4.9 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)
SMBG5342B/TR13 FAQ
1.How can I place an order for SMBG5342B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5342B/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 SMBG5342B/TR13 reliable?
The price and inventory of SMBG5342B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5342B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5342B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5342B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5342B/TR13?
SMBG5342B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5342B/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 SMBG5342B/TR13?
For technical support, including SMBG5342B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5342B/TR13 requirements.
6.How does Aetrix verify that SMBG5342B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5342B/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 SMBG5342B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5342B/TR13?
All SMBG5342B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5342B/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 SMBG5342B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5342B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5342B/TR13 Tags
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