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Microchip Technology SMBG5355C/TR13
- Part No.:
- SMBG5355C/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5355C/TR13.pdf
- Description:
- DIODE ZENER 18V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,388
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Product details
Overview
SMBG5355C/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 18 V, ±2% tolerance (C suffix), and maximum Zener current IZM of 5.5 mA at TL < 25 °C - designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation in industrial control modules.
For engineers reviewing the SMBG5355C/TR13 datasheet, SMBG5355C/TR13 pinout, SMBG5355C/TR13 application, or SMBG5355C/TR13 equivalent, key selection criteria include verified Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge current rating (IZSM = 75 A), 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 dynamic impedance (ZZT = 2.5 Ω at IZT = 65 mA) and minimal voltage drift over temperature (−65 to +150 °C junction range). Its low leakage current (IR ≤ 0.5 µA at VR = 14.4 V) ensures stable regulation under light-load conditions.
The SMBG5355C/TR13 uses a void-free thermosetting epoxy case (UL94V-0 rated) and gull-wing leads compatible with standard SMT reflow profiles (260 °C/10 s). It meets MIL-STD-750 Method 1020 for ESD robustness and requires no dry pack due to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±2% at IZT = 65 mA - enables precise 18 V reference generation with tight tolerance for feedback networks. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports high-energy transient clamping when mounted on lead frame with adequate heat sinking. |
| Dynamic Impedance (ZZT) | 2.5 Ω at IZT = 65 mA - ensures minimal output voltage variation under changing load currents in regulation circuits. |
| Max Surge Current (IZSM) | 75 A (8.3 ms half-sine) - provides robust protection against short-duration voltage transients per IEC 61000-4-5. |
| Thermal Resistance (RθJL) | 25 °C/W - allows direct thermal path from junction to lead, critical for sustained power operation without PCB copper pour. |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 14.4 V - guarantees negligible standby current in high-impedance bias networks. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; banded end must be held positive relative to anode during operation. Leads are RoHS-compliant matte-tin plated and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown terminal | Connected to regulated output node; reverse-biased voltage reference point requiring positive potential relative to anode. |
| Anode | Reference return | Connected to system ground or lower-potential rail; completes Zener conduction path during regulation or clamping events. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5355B equivalent | Identical electrical characteristics and test methods - enables drop-in replacement for legacy through-hole designs using adapter footprints. |
| Level 1 moisture sensitivity | No dry pack required before SMT assembly - reduces handling cost and eliminates bake-out step in production flow. |
| Gull-wing lead geometry | Visible solder joints after reflow - supports automated optical inspection (AOI) and improves process yield in high-density layouts. |
| UL94V-0 epoxy encapsulation | Self-extinguishing plastic body - satisfies flammability requirements for industrial and medical power supplies. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision 18 V reference source for TL431 or similar shunt regulator ICs. Use Value: ±2% VZ tolerance ensures output accuracy within ±1.5% across line/load/temperature, meeting IEC 62368-1 safety margins. |
Use Scenario: Clamps transient surges on 15 V DC bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed between rail and ground to limit peak excursion. Use Value: 75 A surge rating absorbs 8.3 ms transients without degradation, protecting downstream MOSFET gate drivers. |
| Industrial Sensor Reference | Programmable Logic Controller Input Conditioning |
|
Use Scenario: Provides stable 18 V excitation for 4–20 mA current-loop pressure transmitters. IC Role / Device Role / Timing Role: Low-drift voltage reference for analog front-end op-amp biasing. Use Value: 2.5 Ω dynamic impedance minimizes error contribution (<0.1% FS) under varying sensor loading conditions. |
Use Scenario: Conditions 24 V digital input signals to logic-level thresholds in PLC backplane modules. IC Role / Device Role / Timing Role: Input voltage limiter preventing damage from field-wiring faults or EFT bursts. Use Value: 0.5 µA leakage at 14.4 V ensures negligible current draw on high-impedance input dividers, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 18 V ±2% VZ, but axial T-18 package; RθJA = 120 °C/W vs. 90 °C/W for SMBG5355C/TR13. | Requires through-hole mounting and larger board area; unsuitable for high-density SMT assemblies. | Select only when legacy through-hole design or manual repair constraints prohibit surface-mount adoption. |
| SMBJ5355C | Same electrical specs and DO-214AA package, but J-bend leads instead of gull-wing; RθJL = 30 °C/W vs. 25 °C/W. | Lower thermal performance limits continuous power handling in compact enclosures without forced airflow. | Prefer SMBG5355C/TR13 where thermal management or AOI visibility is critical; SMBJ5355C acceptable for cost-sensitive, low-power use cases. |
Compared with 1N5355B and SMBJ5355C, SMBG5355C/TR13 delivers superior thermal transfer (25 °C/W), visible solder joints for inspection, and identical regulation accuracy - making it optimal for space-constrained, thermally demanding industrial power designs.
Availability
SMBG5355C/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor reference systems requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SMBG5355C/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 SMBG53xx series was engineered to deliver JEDEC-standard Zener performance in surface-mount form factor, targeting high-density power conversion and ruggedized embedded systems where thermal reliability and regulatory compliance are mandatory.
FAQ
What is the Zener voltage tolerance of SMBG5355C/TR13?
The SMBG5355C/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its measured VZ falls between 17.64 V and 18.36 V at IZT = 65 mA and TL = 30 °C, as confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0246-1 datasheet.
Is SMBG5355C/TR13 RoHS compliant?
Yes, SMBG5355C/TR13 is RoHS compliant, indicated by the "e3" marking option and matte-tin plating per MIL-STD-750 Method 2026. The "C" suffix confirms ±2% tolerance, and the "TR13" denotes EIA-481-1-A tape-and-reel packaging with 12 mm carrier tape - all consistent with Microsemi's RoHS-compliant product line.
What is the maximum surge current rating for SMBG5355C/TR13?
The SMBG5355C/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 75 A, specified for an 8.3 ms half-sine waveform. This value is explicitly listed in the Electrical Characteristics table for SMBG5355B/C variants and applies directly to SMBG5355C/TR13 as part of the same SMBG5333B–SMBG5388B family.
Does SMBG5355C/TR13 require dry packing before SMT assembly?
No, SMBG5355C/TR13 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored and assembled without baking or humidity-controlled handling - a benefit confirmed in the "MECHANICAL and PACKAGING" section of the datasheet.
What is the thermal resistance junction-to-lead (RθJL) for SMBG5355C/TR13?
The thermal resistance junction-to-lead (RθJL) for SMBG5355C/TR13 is 25 °C/W, as stated in the "MAXIMUM RATINGS" table on page 1 of the datasheet. This value reflects the direct thermal path from silicon die to soldered lead, enabling higher continuous power dissipation than ambient-limited ratings would suggest.
SMBG5355C/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)
SMBG5355C/TR13 FAQ
1.How can I place an order for SMBG5355C/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5355C/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 SMBG5355C/TR13 reliable?
The price and inventory of SMBG5355C/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5355C/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5355C/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5355C/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5355C/TR13?
SMBG5355C/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5355C/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 SMBG5355C/TR13?
For technical support, including SMBG5355C/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5355C/TR13 requirements.
6.How does Aetrix verify that SMBG5355C/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5355C/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 SMBG5355C/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5355C/TR13?
All SMBG5355C/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5355C/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 SMBG5355C/TR13 part is unused and in its original packaging.
Return procedure for SMBG5355C/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5355C/TR13 Tags
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