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Microchip Technology SMBG5357A/TR13
- Part No.:
- SMBG5357A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5357A/TR13.pdf
- Description:
- DIODE ZENER 20V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,734
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Product details
Overview
SMBG5357A/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 20 V, ±10% tolerance (A-suffix), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges, supports surge currents up to 5.1 A (8.3 ms half-sine), and operates from –65 °C to +150 °C junction temperature - used in power supply overvoltage clamping and reference circuits.
For engineers reviewing the SMBG5357A/TR13 datasheet, SMBG5357A/TR13 pinout, SMBG5357A/TR13 application, or SMBG5357A/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJL = 25 °C/W), maximum regulator current (IZM = 75 mA), surge capability (IZSM = 5.1 A), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a precision voltage reference and transient suppressor in DC power rails. Its Zener voltage is specified at IZT = 65 mA with dynamic impedance ZZT ≤ 3.0 Ω, and exhibits minimal voltage drift versus current due to low knee impedance (ZZK ≤ 237 Ω at 1.0 mA).
Designed for high-density PCB layouts, the DO-215AA gull-wing package enables visible solder joints and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required. Thermal performance is rated at RθJA = 90 °C/W on FR4 (1 oz Cu) with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±10% at IZT = 65 mA - defines stable regulation point under nominal bias. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management above ambient to sustain full rating. |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current before exceeding 5 W at upper VZ limit (22 V). |
| Surge Current (IZSM) | 5.1 A (8.3 ms half-sine) - withstands short-duration transients without degradation. |
| Dynamic Impedance (ZZT) | ≤3.0 Ω at IZT = 65 mA - ensures tight voltage regulation under varying load current. |
| Junction Temperature Range | –65 °C to +150 °C - supports operation in automotive under-hood and industrial environments. |
| Thermal Resistance (RθJL) | 25 °C/W - enables efficient heat transfer to PCB copper land, critical for sustained power handling. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; operated with banded end positive relative to anode. Terminals are solderable per MIL-STD-750 Method 2026 using matte-tin (RoHS) or Sn/Pb plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Positive terminal during reverse-bias regulation | Connected to higher-potential rail; clamps overvoltage by conducting when VIN exceeds VZ. |
| Anode | Reference/ground terminal | Typically tied to system ground or low-side return path; completes Zener conduction loop. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N53xxB equivalent | Identical electrical specs and test methods to legacy through-hole 1N5357B - simplifies redesign migration. |
| Gull-wing lead form | Enables visual solder joint inspection and reliable reflow attachment on fine-pitch PCBs. |
| Level 1 moisture sensitivity | No dry pack or baking required prior to assembly - reduces manufacturing overhead and risk of popcorning. |
| High surge current rating | 5.1 A non-repetitive peak withstand capability - protects downstream circuitry from ESD and line transients. |
| Low dynamic impedance | ZZT ≤ 3.0 Ω ensures <100 mV output variation over 20–100% IZT range - improves reference stability. |
Applications
| Power Supply Overvoltage Clamp | DC Reference Voltage Generator |
|---|---|
|
Use Scenario: Clamps 24 V rail against surges exceeding 28 V in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground. Use Value: Prevents damage to 20 V-rated regulators and microcontrollers by limiting rail voltage to ≤22 V (VZ + tolerance). |
Use Scenario: Provides stable 20 V reference for ADC voltage scaling in battery-monitoring circuits. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance and minimal tempco. Use Value: Enables 0.5% full-scale accuracy in 12-bit measurements despite load current variations up to 65 mA. |
| ESD Protection for Sensor Inputs | Fieldbus Termination Voltage Clamp |
|
Use Scenario: Protects analog sensor front-end (e.g., RTD bridge) from ±8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed at connector entry point. Use Value: Absorbs 5.1 A surge without latch-up while adding <1 pF parasitic capacitance - preserves signal integrity. |
Use Scenario: Stabilizes termination voltage on RS-485 bus nodes operating from unregulated 24 V supply. IC Role / Device Role / Timing Role: Shunt regulator maintaining common-mode voltage within transceiver compliance range. Use Value: Ensures >2.5 V differential margin across all nodes even during 10% supply sag - prevents communication dropouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same VZ, tolerance, and IZM, but axial T-18 package - higher RθJA (125 °C/W) and manual assembly only. | Used where through-hole mounting or legacy board compatibility is required; not suitable for automated SMT lines. | Select 1N5357B only if retrofitting existing through-hole designs or avoiding reflow process entirely. |
| SMBJ5357A | Same VZ and tolerance, but DO-214AA (J-bend) package - RθJA = 95 °C/W, slightly lower surge rating (4.9 A). | Better suited for space-constrained layouts where gull-wing leads interfere with adjacent components. | Choose SMBJ5357A when board real estate limits lateral lead spread, accepting minor thermal and surge trade-offs. |
Compared with SMBG5357A/TR13, 1N5357B lacks SMT compatibility and thermal efficiency, while SMBJ5357A sacrifices 4% surge margin and 5 °C/W thermal resistance for tighter footprint - SMBG5357A/TR13 balances manufacturability, robustness, and thermal performance.
Availability
SMBG5357A/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface protection, RS-485 fieldbus termination, and battery-management reference circuits requiring stable component supply and long-term obsolescence support.
Supply support for SMBG5357A/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The SMBG53xxA series was designed specifically for surface-mount voltage regulation and transient suppression in space-constrained, high-surge industrial systems - emphasizing manufacturability, thermal resilience, and JEDEC compatibility.
FAQ
What is the Zener voltage tolerance of SMBG5357A/TR13?
The SMBG5357A/TR13 has a Zener voltage tolerance of ±10%, denoted by the "A" suffix in its part number. This means its breakdown voltage is guaranteed between 18.0 V and 22.0 V when tested at IZT = 65 mA and TL = 25 °C. The tolerance directly impacts regulation accuracy in reference and clamp applications - design margins must accommodate this full range.
Does SMBG5357A/TR13 require dry packing before reflow soldering?
No, SMBG5357A/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing or baking. This eliminates pre-reflow handling steps and reduces risk of popcorn cracking during assembly - a key advantage for high-volume SMT production.
What is the maximum continuous Zener current for SMBG5357A/TR13?
The maximum continuous Zener current (IZM) for SMBG5357A/TR13 is 75 mA at TL < 25 °C. This value is derived from PD = 5.0 W and the upper limit of VZ (22 V). Exceeding 75 mA risks thermal runaway unless board-level heatsinking reduces junction temperature below rated limits.
How does the DO-215AA package of SMBG5357A/TR13 improve thermal performance?
The DO-215AA gull-wing package of SMBG5357A/TR13 achieves RθJL = 25 °C/W by optimizing copper land area and thermal via placement per Microsemi's recommended pad layout. This is 35 °C/W better than the DO-214AA alternative, enabling higher sustained power dissipation without derating - critical for compact power supply designs.
Is SMBG5357A/TR13 RoHS compliant?
Yes, SMBG5357A/TR13 is RoHS compliant, indicated by the absence of a suffix after "A" (e.g., "e3") - Microsemi defaults to matte-tin plating for all TR-suffixed parts unless otherwise specified. This satisfies EU Directive 2011/65/EU and supports lead-free reflow profiles up to 260 °C for 10 seconds.
SMBG5357A/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):
- 20 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 14.4 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)
SMBG5357A/TR13 FAQ
1.How can I place an order for SMBG5357A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5357A/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 SMBG5357A/TR13 reliable?
The price and inventory of SMBG5357A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5357A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5357A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5357A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5357A/TR13?
SMBG5357A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5357A/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 SMBG5357A/TR13?
For technical support, including SMBG5357A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5357A/TR13 requirements.
6.How does Aetrix verify that SMBG5357A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5357A/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 SMBG5357A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5357A/TR13?
All SMBG5357A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5357A/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 SMBG5357A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5357A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5357A/TR13 Tags
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