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Microchip Technology SMBG5345BE3/TR13
- Part No.:
- SMBG5345BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5345BE3/TR13.pdf
- Description:
- DIODE ZENER 8.7V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
SMBG5345BE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 8.7 V, ±5% tolerance (B suffix), 2.0 Ω dynamic impedance at 150 mA test current, and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges in power supply reference and overvoltage protection circuits.
For engineers reviewing the SMBG5345BE3/TR13 datasheet, SMBG5345BE3/TR13 pinout, SMBG5345BE3/TR13 application, or SMBG5345BE3/TR13 equivalent, this page delivers verified electrical specs, thermal behavior, JEDEC-compliant packaging details, and real-world design implications for stable voltage clamping in industrial and automotive power rails.
Technical Context
This device operates as a precision shunt regulator in reverse-biased breakdown mode, maintaining stable 8.7 V output across 1.0 mA to 545 mA operating current range. Its 2.0 Ω dynamic impedance at IZT = 150 mA ensures minimal voltage deviation under load transients.
Thermal resistance is 25 °C/W junction-to-lead and 90 °C/W junction-to-ambient (on FR4 with recommended footprint), enabling reliable 5 W dissipation only when lead temperature remains below 25 °C - otherwise derated per Figure 1 curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V ±5% at 150 mA - defines precise clamping threshold for overvoltage protection and reference stability. |
| Power Dissipation (PD) | 5.0 W at TL ≤ 25 °C - requires heatsinking via PCB copper or thermal vias to sustain full rating. |
| Dynamic Impedance (ZZT) | 2.0 Ω at 150 mA - low impedance ensures <130 mV variation over ±10% current change near regulation point. |
| Max Regulator Current (IZM) | 545 mA - maximum continuous DC current before exceeding 5 W limit at VZ = 8.7 V. |
| Surge Current (IZSM) | 200 A (8.3 ms half-sine) - withstands short-duration transients like ESD or load dump without failure. |
| Junction Temp Range | –65 to +150 °C - supports operation in extended-temperature industrial and under-hood automotive environments. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode band marking; terminals are anode and cathode - cathode is banded end, operated positive relative to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to voltage rail being clamped; reverse-biased to conduct when rail exceeds 8.7 V. |
| Anode | Reference/ground return | Typically tied to system ground or low-side reference; completes current path during Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5345B equivalent | Identical electrical specs and test methods - enables drop-in replacement for legacy through-hole designs using adapter footprints. |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT handling and eliminates bake-out steps prior to reflow. |
| RoHS-compliant matte-tin plating (e3) | Lead-free solder compatibility with standard SnAgCu reflow profiles up to 260 °C for 10 s. |
| Gull-wing leads (DO-215AA) | Visible solder joints enable automated optical inspection (AOI) and improve process yield in high-density layouts. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Shunt reference providing fixed 8.7 V bias to optocoupler LED or TL431 input. Use Value: Maintains ±0.44 V regulation window (±5%) across –40 to +125 °C, ensuring consistent loop gain and output accuracy. |
Use Scenario: Protecting microcontroller I/O pins against 12 V rail transients in automotive body control modules. IC Role / Device Role / Timing Role: Fast-acting crowbar element that conducts above 8.7 V to divert surge energy to ground. Use Value: Withstands 200 A surge (8.3 ms) without degradation, preventing latch-up or gate oxide damage in downstream logic. |
| ESD Protection Network | Industrial Sensor Excitation |
Use Scenario: Secondary-stage clamping in multi-stage TVS + Zener ESD protection for USB 2.0 data lines. IC Role / Device Role / Timing Role: Low-impedance shunt limiter activated after primary TVS absorbs bulk energy. Use Value: 2.0 Ω ZZT minimizes clamping overshoot to <9.1 V at 1 A transient, preserving signal integrity. |
Use Scenario: Providing stable excitation voltage to 4–20 mA current-loop pressure transducers in factory automation PLCs. IC Role / Device Role / Timing Role: Precision voltage source for Wheatstone bridge biasing and analog front-end referencing. Use Value: Low 10 µA leakage at 6.25 V (VR) ensures minimal error contribution (<0.02% FS) in high-impedance sensor interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5345B | Same 8.7 V ±5%, 5 W rating, but axial DO-41 package - no gull-wing leads or SMT compatibility. | Requires through-hole assembly; unsuitable for high-density PCBs or automated SMT lines. | Select only for legacy repair or prototyping where manual soldering is acceptable and board space permits axial footprint. |
| SMBJ5345B | Identical electrical specs and DO-214AA J-bend package - same thermal resistance (RθJA = 90 °C/W) but different lead geometry. | Compatible with standard SMT pick-and-place but requires revised stencil and footprint vs. DO-215AA. | Choose when existing design uses DO-214AA land pattern; verify pad layout matches Microsemi's recommended dimensions before substitution. |
Compared with SMBG5345BE3/TR13, 1N5345B demands through-hole assembly and lacks RoHS compliance, while SMBJ5345B shares all electrical performance but requires footprint adaptation - making SMBG5345BE3/TR13 optimal for new SMT designs needing visible solder joints and Level 1 moisture handling.
Availability
SMBG5345BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and sensor interface circuits requiring stable component supply with RoHS compliance and SMT manufacturability.
Supply support for SMBG5345BE3/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.
SMBG53xxB series belongs to Microsemi's precision Zener diode product line, engineered for stable voltage regulation in harsh environments where long-term drift, surge resilience, and moisture immunity are critical.
FAQ
What is the Zener voltage tolerance for SMBG5345BE3/TR13?
The "B" suffix in SMBG5345BE3/TR13 specifies ±5% Zener voltage tolerance, meaning its regulated voltage falls between 8.265 V and 9.135 V at 150 mA test current and 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0246-1 datasheet, where SMBG5345B is explicitly listed with VZ = 8.7 V and IZT = 150 mA.
Does SMBG5345BE3/TR13 require dry packing before reflow soldering?
No - SMBG5345BE3/TR13 has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, meaning it can be stored indefinitely at ambient conditions without desiccant or dry pack. The device's void-free epoxy body and Level 1 rating eliminate the need for baking prior to reflow, streamlining SMT manufacturing per the Mechanical and Packaging section on page 2.
What is the maximum continuous current SMBG5345BE3/TR13 can handle?
SMBG5345BE3/TR13 supports a maximum continuous Zener current (IZM) of 545 mA, calculated from its 5.0 W power rating and upper-limit Zener voltage (8.7 V × 1.05 = 9.135 V → 5.0 W ÷ 9.135 V ≈ 547 mA). The datasheet directly lists IZM = 545 mA for SMBG5345B on page 3, confirming safe DC operation within thermal limits when lead temperature stays ≤25 °C.
How does the DO-215AA package of SMBG5345BE3/TR13 differ from DO-214AA?
SMBG5345BE3/TR13 uses DO-215AA gull-wing leads, whereas DO-214AA (used in SMBJ5345B) has J-bend terminations. Gull-wing leads provide visible solder joints for AOI and lower coplanarity risk, while J-bend offers higher standoff but requires tighter placement accuracy. Both share identical RθJA = 90 °C/W on FR4, but their footprints are mechanically incompatible per Microsemi's pad layout drawings on page 5.
Is SMBG5345BE3/TR13 suitable for automotive under-hood applications?
Yes - SMBG5345BE3/TR13 is rated for junction temperatures from –65 to +150 °C and withstands 200 A surge current (8.3 ms half-sine), meeting key requirements for engine control units and battery management systems. Its RoHS-compliant matte-tin plating and Level 1 moisture rating further support reliability in thermally aggressive, high-vibration automotive environments as stated in the Applications/Benefits and Maximum Ratings sections.
SMBG5345BE3/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):
- 8.7 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.25 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)
SMBG5345BE3/TR13 FAQ
1.How can I place an order for SMBG5345BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5345BE3/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 SMBG5345BE3/TR13 reliable?
The price and inventory of SMBG5345BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5345BE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5345BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5345BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5345BE3/TR13?
SMBG5345BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5345BE3/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 SMBG5345BE3/TR13?
For technical support, including SMBG5345BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5345BE3/TR13 requirements.
6.How does Aetrix verify that SMBG5345BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5345BE3/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 SMBG5345BE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5345BE3/TR13?
All SMBG5345BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5345BE3/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 SMBG5345BE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5345BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5345BE3/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MM5Z5V1ST1G
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