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Microchip Technology SMBG5373CE3/TR13
- Part No.:
- SMBG5373CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5373CE3/TR13.pdf
- Description:
- DIODE ZENER 68V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,674
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Product details
Overview
SMBG5373CE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 68 V, ±2% tolerance (C suffix), rated test current of 20 mA, dynamic impedance of 44 Ω at IZT, and maximum Zener current of 70 mA. It regulates voltage in power supply feedback loops and overvoltage protection circuits across industrial power converters and telecom DC-DC modules.
For engineers reviewing the SMBG5373CE3/TR13 datasheet, SMBG5373CE3/TR13 pinout, SMBG5373CE3/TR13 application, or SMBG5373CE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current capability (500 A), thermal resistance (25 °C/W junction-to-lead), and RoHS-compliant matte-tin plating for lead-free reflow compatibility.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, maintaining stable regulation over 1.0–70 mA operating current and -65 to +150 °C temperature range. Its low dynamic impedance (44 Ω) ensures minimal voltage variation under load transients.
The DO-215AA gull-wing package enables visible solder joints and supports high-density PCB layouts. With moisture sensitivity level 1 per J-STD-020B, it requires no dry pack prior to assembly and withstands 260 °C soldering for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±2% at 20 mA - precise regulation point for 68 V rail monitoring and clamping |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports continuous operation with adequate heatsinking on lead frame |
| Dynamic Impedance (ZZT) | 44 Ω at IZT = 20 mA - low AC impedance ensures tight voltage stability during ripple and transient events |
| Max Surge Current (IZSM) | 500 A (8.3 ms half-sine) - robust protection against lightning-induced or switching-induced surges |
| Junction-to-Lead Thermal Resistance | 25 °C/W - enables efficient heat transfer to PCB copper, critical for sustained 5 W operation |
| Reverse Leakage (IR) | <0.5 µA at 51.7 V - negligible standby current in high-impedance sensing or bias networks |
| Forward Voltage (VF) | 1.2 V at 1.0 A - supports use as clamp or rectifier in bidirectional protection schemes |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; banded end must be biased positive relative to anode for Zener operation. Leads are RoHS-compliant annealed matte-tin plated and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to lower-potential side of regulated circuit; defines polarity for voltage clamping |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential side (e.g., feedback node or supply rail) to enable regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5373B equivalent | Identical electrical specs and testing to legacy through-hole 1N5373B - enables drop-in replacement in upgraded SMT designs |
| ±2% Zener voltage tolerance | Tighter regulation window than ±5% (B) or ±10% (A) variants - reduces need for post-regulation trimming in precision supplies |
| Level 1 moisture sensitivity | No dry pack required before reflow - eliminates handling overhead and shelf-life constraints in production |
| Gull-wing lead form | Visible solder fillets and mechanical strain relief - improves process yield and long-term reliability in thermally cycled environments |
Applications
| Industrial Power Supply Feedback | Telecom DC-DC Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint. Use Value: ±2% VZ tolerance ensures output stays within ±3% spec without software calibration or external trimming. | Use Scenario: Clamps secondary-side rail during transient overvoltage events in 48 V telecom power systems. IC Role / Device Role / Timing Role: Fast-acting shunt protector absorbing up to 500 A surge energy. Use Value: 500 A IZSM rating handles 8.3 ms line surges without degradation, extending system MTBF. |
| Automotive Body Control Module Protection | Test Equipment Reference Calibration |
Use Scenario: Suppresses load-dump spikes on 12 V battery rails in BCM microcontroller power inputs. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between input filter and LDO regulator. Use Value: 25 °C/W RθJL allows direct thermal coupling to chassis ground plane, sustaining repeated 120 V/100 ms pulses. | Use Scenario: Provides stable 68 V reference in automated calibration fixtures for multimeter and DMM verification. IC Role / Device Role / Timing Role: Low-drift Zener source for analog reference chain. Use Value: 44 Ω ZZT minimizes current-dependent voltage shift during 1–20 mA sourcing, improving measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM; non-RoHS Sn/Pb plating | Requires through-hole assembly; unsuitable for high-density SMT boards | Select when legacy through-hole design or manual repair is required |
| SMBJ5373B | DO-214AA J-bend package; same VZ and electrical specs; 90 °C/W RθJA vs. 25 °C/W RθJL of SMBG5373CE3/TR13 | Lower thermal performance limits continuous power in compact layouts | Select only if footprint compatibility with existing DO-214AA designs is mandatory |
Compared with SMBG5373CE3/TR13, 1N5373B offers identical regulation but lacks SMT manufacturability and RoHS compliance, while SMBJ5373B sacrifices thermal efficiency for footprint reuse-neither provides the combined benefits of gull-wing visibility, Level 1 moisture rating, and 25 °C/W junction-to-lead conduction.
Availability
SMBG5373CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply feedback, telecom DC-DC overvoltage clamp, and automotive body control module protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG5373CE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, industrial, and communications markets.
The SMBG53xx series targets surface-mount Zener regulation in space-constrained, high-surge environments where precision, thermal performance, and assembly compatibility are critical.
FAQ
What is the Zener voltage tolerance of SMBG5373CE3/TR13?
The SMBG5373CE3/TR13 has a ±2% Zener voltage tolerance, denoted by the "C" suffix in its part number. This means its nominal 68 V Zener voltage is guaranteed between 66.64 V and 69.36 V when measured at 20 mA and 25 °C. This tighter tolerance supports precision regulation without post-production calibration in SMBG5373CE3/TR13-based feedback networks.
Is SMBG5373CE3/TR13 RoHS compliant?
Yes, SMBG5373CE3/TR13 is RoHS compliant, indicated by the "e3" suffix. It features annealed matte-tin plating instead of Sn/Pb, meeting EU Directive 2011/65/EU requirements. The device is qualified for lead-free reflow soldering up to 260 °C for 10 seconds and carries IPC/JEDEC moisture sensitivity level 1, eliminating dry-pack requirements before assembly.
What is the maximum surge current rating for SMBG5373CE3/TR13?
The SMBG5373CE3/TR13 is rated for a maximum non-repetitive peak Zener surge current (IZSM) of 500 A, specified for an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy in overvoltage protection applications such as telecom line surge suppression or automotive load-dump clamping without parametric shift or failure.
How does the thermal resistance of SMBG5373CE3/TR13 compare to other 5 W Zeners?
SMBG5373CE3/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W, significantly lower than the 90 °C/W junction-to-ambient (RθJA) typical of DO-214AA packages. This enables more efficient heat transfer directly into PCB copper traces or thermal pads, allowing SMBG5373CE3/TR13 to sustain full 5 W dissipation with proper lead-frame heatsinking-unlike ambient-limited alternatives.
Can SMBG5373CE3/TR13 replace 1N5373B in existing designs?
Yes, SMBG5373CE3/TR13 is electrically equivalent to 1N5373B per Microsemi documentation, sharing identical Zener voltage, test current, dynamic impedance, and surge ratings. However, the SMBG5373CE3/TR13 uses a DO-215AA gull-wing package versus the axial T-18 of 1N5373B, so board layout and assembly processes must be updated-no PCB changes are needed only if migrating from another SMBG-series variant.
SMBG5373CE3/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):
- 68 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 44 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 49 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)
SMBG5373CE3/TR13 FAQ
1.How can I place an order for SMBG5373CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5373CE3/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 SMBG5373CE3/TR13 reliable?
The price and inventory of SMBG5373CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5373CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5373CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5373CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5373CE3/TR13?
SMBG5373CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5373CE3/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 SMBG5373CE3/TR13?
For technical support, including SMBG5373CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5373CE3/TR13 requirements.
6.How does Aetrix verify that SMBG5373CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5373CE3/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 SMBG5373CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5373CE3/TR13?
All SMBG5373CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5373CE3/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 SMBG5373CE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5373CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5373CE3/TR13 Tags
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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