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Microchip Technology SMBG5370B/TR13
- Part No.:
- SMBG5370B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5370B/TR13.pdf
- Description:
- DIODE ZENER 56V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,370
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Product details
Overview
SMBG5370B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 56 V, ±5% tolerance (B suffix), 20 mA test current, and 35 Ω dynamic impedance at IZT; used for precision voltage regulation in power supply feedback loops, overvoltage protection, and reference circuits.
For engineers reviewing the SMBG5370B/TR13 datasheet, SMBG5370B/TR13 pinout, SMBG5370B/TR13 application, or SMBG5370B/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current capability (280 A), thermal resistance (25 °C/W junction-to-lead), DO-215AA gull-wing package compatibility, and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse-biased breakdown mode with tightly controlled VZ = 56 V at IZT = 20 mA, exhibiting low dynamic impedance (ZZT = 35 Ω) and minimal voltage drift over temperature (−65 to +150 °C junction range). Its DO-215AA gull-wing package enables visible solder joints and supports high-density PCB layouts.
The SMBG5370B/TR13 delivers stable regulation across wide operating currents (IZK = 1.0 mA knee point, IZM = 280 mA max DC current) and withstands non-repetitive 8.3 ms half-sine surges up to 280 A, meeting MIL-STD-750 ESD robustness requirements without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 20 mA - defines precise clamping threshold for feedback or protection circuits |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management on FR4 board with recommended footprint |
| Dynamic Impedance (ZZT) | 35 Ω at 20 mA - ensures low output impedance and minimal voltage variation under load changes |
| Max Surge Current (IZSM) | 280 A (8.3 ms half-sine) - provides transient overvoltage immunity without derating |
| Junction Temp Range | −65 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 when mounted per spec |
| Reverse Leakage (IR) | 0.5 µA at 42.6 V - guarantees low standby power loss in high-impedance bias networks |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes polarity for reverse-bias operation |
| Cathode | Regulated output node | Banded end; carries regulated voltage referenced to anode; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5370B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Gull-wing lead form | Visible solder joints and automated optical inspection compatibility - improves manufacturing yield |
| Moisture Sensitivity Level 1 | No dry pack required - reduces handling cost and eliminates bake-out before reflow |
| RoHS-compliant finish | Matte-tin plating (e3) - meets EU directive and avoids lead-based solder compatibility issues |
| High surge current rating | 280 A peak - protects downstream circuitry against lightning-induced transients and inductive kickback |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference and error amplifier input clamp. Use Value: Maintains ±1% output regulation across line/load/temperature with 35 Ω ZZT limiting feedback loop gain variation. |
Use Scenario: Clamps rail voltage during motor drive turn-off or relay coil de-energization. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting microcontroller I/O and analog inputs. Use Value: Absorbs 280 A surge energy without failure, preventing latch-up or gate oxide damage in connected ICs. |
| Programmable Reference Source | Automotive Battery Monitoring |
Use Scenario: Provides stable 56 V reference for ADC input scaling in programmable power supplies. IC Role / Device Role / Timing Role: High-accuracy analog reference node with low temperature coefficient. Use Value: Enables 12-bit measurement resolution over −40 to +125 °C due to tight ±5% VZ tolerance and low IR drift. |
Use Scenario: Monitors 48 V battery stack voltage in commercial vehicle start-stop systems. IC Role / Device Role / Timing Role: Overvoltage detection element feeding comparator input. Use Value: Triggers shutdown at 58.8 V (high-end VZ tolerance) with sub-µA leakage preserving battery life during sleep mode. |
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, IZT, ZZT, and IZM specs; no gull-wing geometry | Requires through-hole assembly; unsuitable for high-density SMT lines | Select when legacy through-hole design or manual prototyping is required |
| SMBJ5370B | DO-214AA J-bend package; same electrical specs but higher RθJA (100 °C/W vs. 90 °C/W); different pad layout | Lower thermal performance on standard FR4; may require larger copper pour for 5 W dissipation | Select when existing DO-214AA footprint is fixed and thermal margin allows |
Compared with SMBG5370B/TR13, 1N5370B offers identical regulation performance but mandates through-hole assembly, while SMBJ5370B fits J-bend footprints but demands greater PCB thermal design effort to sustain full 5 W operation.
Availability
SMBG5370B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage clamps, and automotive battery monitoring systems requiring stable component supply, consistent Zener voltage accuracy, and RoHS-compliant packaging.
Supply support for SMBG5370B/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.
The SMBG53xxB series was designed to deliver JEDEC-registered Zener performance in surface-mount form for high-density power management and protection circuits where thermal reliability and manufacturability are critical.
FAQ
What is the Zener voltage tolerance for SMBG5370B/TR13?
The "B" suffix in SMBG5370B/TR13 specifies a ±5% Zener voltage tolerance, meaning the measured VZ at 20 mA falls between 53.2 V and 58.8 V. This tolerance is verified per JEDEC test conditions and applies across the full operating temperature range of −65 to +150 °C. The SMBG5370B/TR13 maintains this specification without requiring derating at elevated ambient temperatures when mounted per recommended footprint.
Does SMBG5370B/TR13 require dry packing before reflow soldering?
No, SMBG5370B/TR13 has a moisture sensitivity level (MSL) of Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking prior to reflow. This eliminates process steps and cost associated with moisture-sensitive handling, making SMBG5370B/TR13 suitable for high-volume SMT production lines without special humidity controls.
What is the maximum continuous Zener current for SMBG5370B/TR13?
The maximum regulator current (IZM) for SMBG5370B/TR13 is 280 mA at TL < 25 °C, calculated per Note 3 in the datasheet using P/VZM (5.0 W ÷ 58.8 V). At higher lead temperatures, IZM must be reduced per the derating curve in Figure 1. This value reflects the device's ability to sustain full 5 W dissipation when properly heatsunk to PCB copper, not ambient-rated operation.
How does SMBG5370B/TR13 compare to the axial-leaded 1N5370B?
SMBG5370B/TR13 is electrically identical to 1N5370B in all key parameters-VZ, IZT, ZZT, IZM, and IR-but uses a DO-215AA gull-wing surface-mount package instead of the T-18 axial-leaded case. The SMBG5370B/TR13 supports automated placement and reflow, whereas 1N5370B requires through-hole insertion. Both share the same ±5% tolerance and 5 W rating.
Is SMBG5370B/TR13 RoHS compliant?
Yes, SMBG5370B/TR13 is RoHS compliant, indicated by the "e3" marking variant (e.g., SMBG5370Be3) and confirmed in the datasheet's features and mechanical sections. It uses annealed matte-tin plating per MIL-STD-750 method 2026 and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. The TR13 tape-and-reel packaging also complies with RoHS shipping requirements.
SMBG5370B/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:
- ±5%
- 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)
SMBG5370B/TR13 FAQ
1.How can I place an order for SMBG5370B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5370B/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 SMBG5370B/TR13 reliable?
The price and inventory of SMBG5370B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5370B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5370B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5370B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5370B/TR13?
SMBG5370B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5370B/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 SMBG5370B/TR13?
For technical support, including SMBG5370B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5370B/TR13 requirements.
6.How does Aetrix verify that SMBG5370B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5370B/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 SMBG5370B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5370B/TR13?
All SMBG5370B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5370B/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 SMBG5370B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5370B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5370B/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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