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Microchip Technology SMBG5355CE3/TR13
- Part No.:
- SMBG5355CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5355CE3/TR13.pdf
- Description:
- DIODE ZENER 18V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,518
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Product details
Overview
SMBG5355CE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 18 V, ±2% tolerance (C suffix), RoHS-compliant matte-tin plating, 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 SMBG5355CE3/TR13 datasheet, SMBG5355CE3/TR13 pinout, SMBG5355CE3/TR13 application, or SMBG5355CE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (5.5 A), thermal resistance (25 °C/W junction-to-lead), and compatibility with high-density PCB layouts requiring visible solder joints.
Technical Context
This device operates as a precision voltage reference in reverse-biased mode, maintaining stable 18 V regulation at IZT = 65 mA with dynamic impedance ZZT = 2.5 Ω. Its low knee impedance (ZZK = 264 Ω @ 1 mA) ensures predictable behavior near breakdown onset.
The DO-215AA gull-wing package enables visual solder inspection and supports moisture sensitivity Level 1 handling without dry pack. Thermal performance is defined by RθJL = 25 °C/W and RθJA = 90 °C/W on FR4 with recommended footprint, enabling reliable 5 W dissipation only when lead temperature TL < 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±2% at IZT = 65 mA - precise reference for 15–21 V system rails |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via copper pour or heatsinked leads |
| Dynamic Impedance (ZZT) | 2.5 Ω at IZT - low AC impedance ensures minimal output voltage variation under load transients |
| Max Regulator Current (IZM) | 75 mA - maximum DC current before exceeding 5 W rating at upper VZ tolerance limit (18.36 V) |
| Surge Current (IZSM) | 5.5 A (8.3 ms half-sine) - withstands transient overvoltage events in industrial power inputs |
| Junction Temperature Range | −65 to +150 °C - supports operation in extended-temperature automotive and industrial environments |
| Reverse Leakage (IR) | 0.5 µA at VR = 14.4 V - negligible standby current in battery-backed or low-power monitoring circuits |
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, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lowest potential point; establishes return path for Zener current |
| Cathode | Regulated output node | Banded terminal; supplies stable 18 V to downstream circuitry when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5355B equivalence | Identical electrical characteristics and test methods - enables drop-in replacement in legacy designs |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT assembly logistics and reduces handling cost |
| Gull-wing lead form | Visible solder joints - enables automated optical inspection (AOI) and rework verification |
| High surge current capability | 5.5 A non-repetitive peak - protects downstream ICs from line transients without external TVS stacking |
| Low dynamic impedance | 2.5 Ω at 65 mA - maintains voltage stability under varying load currents in feedback loops |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Precision voltage reference for optocoupler-based error amplifier input. Use Value: ±2% VZ tolerance and 2.5 Ω dynamic impedance ensure <±0.5% output voltage drift across line/load/temperature. |
Use Scenario: Protecting microcontroller I/O pins from 24 V field bus surges in PLC modules. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy to ground during transients. Use Value: 5.5 A surge rating and 18 V clamping threshold prevent latch-up or damage without adding series impedance. |
| Voltage Monitor Threshold | Industrial Sensor Excitation |
|
Use Scenario: Detecting brownout conditions in 24 V industrial control systems. IC Role / Device Role / Timing Role: Fixed reference for comparator input against scaled system voltage. Use Value: Low IR (0.5 µA) avoids loading divider networks; tight 18 V tolerance enables accurate 10% undervoltage detection. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in process instrumentation. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for bridge biasing. Use Value: Minimal VZ drift vs. current (low ZZT) and −65 to +150 °C operating range ensure measurement repeatability across ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; non-RoHS (Sn/Pb plating) | Requires through-hole assembly; unsuitable for high-density SMT boards | Select when legacy through-hole production or hand-solder repair is required |
| SMBJ5355B | DO-214AA J-bend package; same electrical specs; 20% higher RθJA (108 °C/W) due to smaller thermal pad area | Lower thermal performance on FR4; derates to ~3.7 W at TA = 25 °C | Select when existing DO-214AA footprint is fixed and 18 V ±5% tolerance is acceptable |
Compared with SMBG5355CE3/TR13, 1N5355B offers identical regulation but mandates through-hole assembly, while SMBJ5355B fits SMT lines yet sacrifices thermal margin-making SMBG5355CE3/TR13 optimal for new high-density, RoHS-compliant designs needing full 5 W capability.
Availability
SMBG5355CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, PLC input protection, RTD sensor excitation, and brownout detection circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG5355CE3/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 SMBG53xxB series was designed specifically for surface-mount voltage regulation in space-constrained, high-surge industrial power systems-emphasizing JEDEC compatibility, visual solder inspection, and moisture-insensitive handling.
FAQ
What is the Zener voltage tolerance for SMBG5355CE3/TR13?
The 'C' suffix in SMBG5355CE3/TR13 denotes ±2% Zener voltage tolerance at 65 mA test current, resulting in a guaranteed 17.64 V to 18.36 V range at 25 °C. This tighter tolerance supports precision reference applications where standard ±5% devices would introduce unacceptable error margins.
Can SMBG5355CE3/TR13 replace 1N5355B in existing designs?
Yes, SMBG5355CE3/TR13 is electrically identical to 1N5355B per Microsemi documentation and JEDEC registration, with matching VZ, IZT, ZZT, and IZM values. However, the DO-215AA gull-wing package requires PCB footprint revision-no direct drop-in replacement without layout change.
What is the maximum continuous power dissipation for SMBG5355CE3/TR13?
SMBG5355CE3/TR13 delivers 5.0 W only when lead temperature TL remains below 25 °C. On standard FR4 with recommended footprint, power must be derated above 25 °C per Figure 1, reaching zero at TL = 150 °C. At TA = 25 °C, practical dissipation is ~1.38 W without heatsinking.
Does SMBG5355CE3/TR13 require dry packing for moisture sensitivity?
No. SMBG5355CE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/85% RH without dry pack or floor-life restrictions-simplifying inventory management and eliminating bake-out steps prior to reflow.
What is the surge current rating for SMBG5355CE3/TR13 and how is it defined?
SMBG5355CE3/TR13 has a non-repetitive peak surge current (IZSM) of 5.5 A, specified for a single 8.3 ms half-sine waveform per Note 4. This rating validates its use in protecting against common industrial transients like inductive switch-off spikes or lightning-induced surges on 24 V control lines.
SMBG5355CE3/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):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13 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)
SMBG5355CE3/TR13 FAQ
1.How can I place an order for SMBG5355CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5355CE3/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 SMBG5355CE3/TR13 reliable?
The price and inventory of SMBG5355CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5355CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5355CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5355CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5355CE3/TR13?
SMBG5355CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5355CE3/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 SMBG5355CE3/TR13?
For technical support, including SMBG5355CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5355CE3/TR13 requirements.
6.How does Aetrix verify that SMBG5355CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5355CE3/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 SMBG5355CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5355CE3/TR13?
All SMBG5355CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5355CE3/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 SMBG5355CE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5355CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5355CE3/TR13 Tags
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