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Microchip Technology 1N5350A/TR8
- Part No.:
- 1N5350A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350A/TR8.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,619
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Product details
Overview
1N5350A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 13 V, ±10% tolerance (A suffix), 100 mA maximum regulator current (IZM), and 2.5 Ω maximum dynamic impedance (ZZ) at 100 mA test current - used for precision voltage reference and overvoltage protection in DC power supplies and industrial control circuits.
For engineers reviewing the 1N5350A/TR8 datasheet, 1N5350A/TR8 pinout, 1N5350A/TR8 application, or 1N5350A/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), reverse leakage performance (1.0 µA at 9.4 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to maintain stable output voltage across wide current (10–100 mA) and temperature (−65 °C to +150 °C) ranges. Its low dynamic impedance (2.5 Ω) and tight voltage regulation (ΔVZ = 0.25 V) ensure minimal drift under load variation.
The 1N5350A/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band marking, rated for 5 W steady-state dissipation at 25 °C lead temperature (3/8″ from body), and supports tape-and-reel packaging (TR8 suffix denotes EIA-296 standard reel).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±10% - defines nominal regulation point; high-end tolerance limit is 14.3 V for IZM calculation. |
| Test Current (IZT) | 100 mA - standardized bias point where VZ and ZZ are measured; ensures repeatable characterization. |
| Dynamic Impedance (ZZ) | 2.5 Ω max - low series resistance enables stable regulation under varying load currents. |
| Max Reverse Current (IR) | 1.0 µA at VR = 9.4 V - confirms sharp knee and low leakage below breakdown threshold. |
| Max Regulator Current (IZM) | 100 mA - maximum continuous DC current at TL = 25 °C; derates linearly above 25 °C. |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage suppression. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with discrete heat sinking at 3/8″ lead length. |
Pinout & Package
T-18 axial-leaded plastic package (void-free UL94V-0 epoxy); cathode indicated by single black band; leads plated with RoHS-compliant annealed matte tin, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential. |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; held at stable 13 V relative to anode during regulation; carries full IZM/IZSM current. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xx series | Industry-standard footprint and electrical behavior enabling direct replacement in legacy designs. |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling in manufacturing without special static controls beyond standard practices. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU; matte-tin plating replaces lead-based finishes. |
| High surge current withstand (75 A) | Protects downstream circuitry against 8.3 ms line transients without failure. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loops in 24 V DC-DC converters powering PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise 13 V reference to error amplifier input. Use Value: Maintains ±1% output stability over −40 °C to +85 °C ambient due to low ΔVZ (0.25 V) and 25 °C/W RθJL. |
Use Scenario: Clamping induced surges on 12 V automotive sensor supply lines exposed to load-dump events. IC Role / Device Role / Timing Role: Transient voltage suppressor diverting >75 A surge current away from sensitive analog front-ends. Use Value: Withstands 8.3 ms half-sine surges up to 75 A without parametric shift or catastrophic failure. |
| Programmable Logic Controller Input Conditioning | Test Equipment Voltage Reference |
Use Scenario: Level-shifting and noise filtering for 0–10 V analog inputs in modular PLC backplanes. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to 13 V while absorbing EMI-induced spikes. Use Value: Low 1.0 µA IR at 9.4 V prevents loading of high-impedance signal sources during normal operation. |
Use Scenario: Providing stable 13 V reference in portable multimeter calibration circuits. IC Role / Device Role / Timing Role: Precision voltage standard traceable to JEDEC-regulated Zener characteristics. Use Value: ±10% VZ tolerance and 2.5 Ω ZZ support <0.5% measurement uncertainty in 4-wire reference topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5350B/TR8 | ±5% VZ tolerance (vs. ±10% for 1N5350A/TR8); identical VZ nominal, IZT, ZZ, and package. | Higher precision required in feedback references where tighter regulation margin is critical. | Select 1N5350B/TR8 when system-level voltage accuracy demands <±0.65 V deviation at 13 V. |
| MMBZ5243B-TP | Surface-mount SOD-123 package; 13 V ±5%; 225 mW power rating (vs. 5 W); 30 Ω ZZ. | Space-constrained PCBs where thermal mass and surge immunity are secondary to footprint size. | Choose MMBZ5243B-TP only for low-power signal-level clamping; not suitable for 100 mA IZM or 75 A IZSM use cases. |
Compared with 1N5350B/TR8, the 1N5350A/TR8 trades voltage precision for cost and legacy compatibility; versus MMBZ5243B-TP, it delivers 22× higher power handling and 12× lower dynamic impedance - essential for industrial-grade regulation and surge suppression.
Availability
1N5350A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable logic controller input conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1N5350A/TR8 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 (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 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems - emphasizing surge resilience, wide temperature operation, and JEDEC-standard interoperability.
FAQ
What is the Zener voltage tolerance of the 1N5350A/TR8?
The 1N5350A/TR8 has a nominal Zener voltage of 13 V with ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ falls between 11.7 V and 14.3 V at 100 mA test current and 25 °C lead temperature. The tolerance directly affects regulation accuracy in feedback networks and must be accounted for in worst-case design margins.
Can the 1N5350A/TR8 be used in surface-mount designs?
No - the 1N5350A/TR8 is an axial-leaded T-18 package and is not compatible with surface-mount assembly processes. For SMT equivalents, Microsemi offers the SMBJ5350A series in DO-214AA (SMB) package. Substituting 1N5350A/TR8 into an SMT layout would require mechanical rework, thermal redesign, and validation of solder joint reliability under vibration and thermal cycling.
What is the maximum power dissipation of the 1N5350A/TR8 at 75 °C lead temperature?
At 75 °C lead temperature (TL), the 1N5350A/TR8 derates linearly from 5.0 W at 25 °C. Using the specified 25 °C/W thermal resistance, power dissipation drops to 3.75 W (5.0 W × [1 − (75 − 25)/200]). This value must be respected in thermal design to avoid exceeding junction temperature limits and ensure long-term reliability.
Does the 1N5350A/TR8 meet RoHS requirements?
Yes - the "e3" designation in Microsemi's official documentation confirms the 1N5350A/TR8 is RoHS compliant, with annealed matte-tin plating on leads meeting EU Directive 2011/65/EU. The T-18 epoxy body is also halogen-free and complies with IPC/JEDEC J-STD-020B moisture sensitivity Level 1.
How does the 1N5350A/TR8 compare to the 1N4742A in terms of power handling?
The 1N5350A/TR8 is rated for 5 W continuous dissipation, whereas the 1N4742A is a 1 W Zener. At identical 13 V nominal voltage, the 1N5350A/TR8 supports 100 mA IZM versus 76 mA for the 1N4742A - making it suitable for higher-current regulation and surge clamping where thermal mass and robustness are required.
1N5350A/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5350A/TR8 FAQ
1.How can I place an order for 1N5350A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350A/TR8 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 1N5350A/TR8 reliable?
The price and inventory of 1N5350A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5350A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350A/TR8?
1N5350A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350A/TR8 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 1N5350A/TR8?
For technical support, including 1N5350A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350A/TR8 requirements.
6.How does Aetrix verify that 1N5350A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5350A/TR8 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 1N5350A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5350A/TR8?
All 1N5350A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350A/TR8, 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 1N5350A/TR8 part is unused and in its original packaging.
Return procedure for 1N5350A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350A/TR8 Tags
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