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Microchip Technology SMBG5370AE3/TR13
- Part No.:
- SMBG5370AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5370AE3/TR13.pdf
- Description:
- DIODE ZENER 56V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,841
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Product details
Overview
SMBG5370AE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 56 V, ±10% tolerance (A suffix), 20 mA test current (IZT), 35 Ω dynamic impedance (ZZT), and 280 A surge current rating (IZSM); used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5370AE3/TR13 datasheet, SMBG5370AE3/TR13 pinout, SMBG5370AE3/TR13 application, or SMBG5370AE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge capability (8.3 ms half-sine), moisture sensitivity level (MSL 1), and RoHS-compliant matte-tin plating.
Technical Context
This device operates as a two-terminal voltage reference in reverse-bias breakdown mode, maintaining stable output voltage across wide current (20 mA to 280 A surge) and temperature (–65 °C to +150 °C) ranges. Its DO-215AA gull-wing package enables visible solder joints and supports high-density PCB layouts.
It conforms to JEDEC 1N5370B specifications with identical electrical characteristics and testing. The cathode band indicates polarity, requiring the banded end to be biased positive relative to the anode during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±10% at 20 mA - defines regulated output voltage under nominal bias; tolerance impacts closed-loop feedback accuracy in SMPS designs. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - maximum steady-state power handling with lead temperature control; derates to 1.38 W at TA = 25 °C on FR4. |
| Dynamic Impedance (ZZT) | 35 Ω at IZT = 20 mA - low AC impedance ensures minimal voltage variation under dynamic load transients. |
| Surge Current (IZSM) | 280 A (8.3 ms half-sine) - withstands high-energy transient events such as lightning-induced surges or inductive kickback. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables efficient heat transfer to PCB copper; critical for reliability in compact, thermally constrained layouts. |
| Moisture Sensitivity | Level 1 per J-STD-020B - no dry pack required prior to reflow; simplifies manufacturing logistics and reduces BOM handling cost. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by a band on the body; terminals are anode (unbanded end) and cathode (banded end). Designed for visible solder joint inspection and compatible with standard SMT reflow profiles (260 °C peak, 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; referenced ground node in reverse-bias regulation | Connected to lower-potential side of circuit; forms return path for Zener current in shunt regulator topologies. |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse-bias operation | Banded terminal connected to higher-potential rail; maintains stable 56 V reference relative to anode under controlled reverse current. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5370B Equivalent | Fully interchangeable with legacy axial 1N5370B in electrical performance and test methodology - enables drop-in replacement in legacy designs. |
| RoHS Compliant Matte-Tin Plating | e3 suffix confirms annealed matte-tin finish compliant with RoHS Directive 2011/65/EU - eliminates lead content without sacrificing solderability or corrosion resistance. |
| High Surge Withstand | 280 A non-repetitive surge rating (8.3 ms half-sine) - protects downstream circuitry from ESD and line transients without external clamping components. |
| Low Dynamic Impedance | 35 Ω at 20 mA - minimizes output voltage deviation during rapid load changes, improving regulation stability in feedback-sensitive applications. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler-coupled feedback loop of isolated DC-DC converter to regulate 56 V output rail. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 56 V threshold for error amplifier comparison. Use Value: Maintains ±10% output regulation across –40 °C to +125 °C ambient while supporting 20–200 mA dynamic current range. | Use Scenario: Placed across input bus of industrial motor drive to clamp transient spikes above 56 V. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing energy from inductive kickback or lightning surges. Use Value: Withstands 280 A surge (8.3 ms) without degradation, eliminating need for additional TVS diodes in cost-sensitive designs. |
| Programmable Voltage Reference | DC Link Monitoring Threshold |
Use Scenario: Used with resistor divider to generate accurate 56 V reference for ADC input scaling in battery management system. IC Role / Device Role / Timing Role: Precision analog reference source for voltage measurement subsystem. Use Value: Delivers stable 56 V ±10% with 35 Ω dynamic impedance, enabling <0.5% full-scale error in 12-bit ADC measurements. | Use Scenario: Monitors 60 V DC link in solar inverter; triggers shutdown when voltage exceeds safe operating limit. IC Role / Device Role / Timing Role: Overvoltage detection element in safety-critical monitoring chain. Use Value: Provides deterministic 56 V trip point with MSL 1 moisture rating - ensures long-term reliability in humid outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5370B | Axial-leaded T-18 package; identical VZ (56 V), IZT (20 mA), ZZT (35 Ω), but RθJA = 120 °C/W vs. 90 °C/W for SMBG5370AE3/TR13 | Requires through-hole assembly; unsuitable for high-density SMT production or automated optical inspection | Select when legacy board repair or prototyping with through-hole infrastructure is required. |
| SMBJ5370B | DO-214AA J-bend package; same VZ, IZT, ZZT, and RoHS compliance, but RθJL = 30 °C/W (vs. 25 °C/W) and IZSM = 250 A (vs. 280 A) | Lower surge rating and higher thermal resistance reduce margin in high-stress industrial environments | Select when footprint compatibility with SMBJ series is prioritized over peak surge performance. |
Compared with 1N5370B and SMBJ5370B, SMBG5370AE3/TR13 offers superior thermal performance (25 °C/W RθJL), highest surge rating (280 A), and gull-wing geometry enabling visual solder joint verification - making it optimal for high-reliability SMT power regulation.
Availability
SMBG5370AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and DC link monitoring systems requiring stable component supply and RoHS compliance.
Supply support for SMBG5370AE3/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 SMBG53xx series was designed specifically for surface-mount voltage regulation in space-constrained, high-surge industrial power systems - emphasizing thermal efficiency, MSL 1 manufacturability, and JEDEC-compatibility.
FAQ
What is the Zener voltage tolerance of SMBG5370AE3/TR13?
The SMBG5370AE3/TR13 has a Zener voltage tolerance of ±10%, denoted by the "A" suffix in its part number. This means its nominal 56 V Zener voltage falls within the range of 50.4 V to 61.6 V when measured at 20 mA test current and 25 °C. This tolerance directly affects regulation accuracy in feedback loops and must be accounted for in system-level voltage margining.
Does SMBG5370AE3/TR13 require dry packing before reflow soldering?
No, SMBG5370AE3/TR13 does not require dry packing before reflow soldering. It carries a moisture sensitivity level (MSL) rating of Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ≤30 °C/60% RH without baking. This eliminates pre-reflow drying steps and reduces manufacturing overhead in high-volume SMT lines.
What is the maximum continuous power dissipation for SMBG5370AE3/TR13?
The SMBG5370AE3/TR13 has a maximum continuous power dissipation of 5.0 W when lead temperature (TL) is maintained below 25 °C. On a standard FR4 PCB with 1 oz copper and recommended footprint, this derates to 1.38 W at 25 °C ambient temperature (TA), due to its RθJA of 90 °C/W. Thermal design must ensure adequate copper area and airflow to sustain target power levels.
How is polarity marked on SMBG5370AE3/TR13?
Polarity on SMBG5370AE3/TR13 is marked by a cathode band on the body of the DO-215AA package. During operation, the banded end must be biased positive relative to the unbanded (anode) end to achieve Zener breakdown regulation. Incorrect orientation results in forward conduction (~1.2 V drop) rather than voltage regulation.
Is SMBG5370AE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5370AE3/TR13 is compatible with lead-free reflow profiles. Its matte-tin (e3) plating supports peak temperatures up to 260 °C for 10 seconds, meeting JEDEC J-STD-020 requirements for Pb-free assembly. The device's thermal resistance and package integrity remain stable across standard SAC305 reflow cycles without delamination or parametric shift.
SMBG5370AE3/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):
- 56 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 40.3 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)
SMBG5370AE3/TR13 FAQ
1.How can I place an order for SMBG5370AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5370AE3/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 SMBG5370AE3/TR13 reliable?
The price and inventory of SMBG5370AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5370AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5370AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5370AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5370AE3/TR13?
SMBG5370AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5370AE3/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 SMBG5370AE3/TR13?
For technical support, including SMBG5370AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5370AE3/TR13 requirements.
6.How does Aetrix verify that SMBG5370AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5370AE3/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 SMBG5370AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5370AE3/TR13?
All SMBG5370AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5370AE3/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 SMBG5370AE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5370AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5370AE3/TR13 Tags
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