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Microchip Technology 1N5350A/TR12
- Part No.:
- 1N5350A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350A/TR12.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,993
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Product details
Overview
1N5350A/TR12 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 voltage reference and overvoltage protection in power supply feedback loops and industrial control circuits.
For engineers reviewing the 1N5350A/TR12 datasheet, 1N5350A/TR12 pinout, 1N5350A/TR12 application, or 1N5350A/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (7.0 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a reverse-biased voltage reference with specified regulation over 10–50% of IZM (10–50 mA), exhibiting ΔVZ ≤ 0.25 V across that range. Its low thermal resistance (25 °C/W at 10 mm lead length) enables stable regulation under sustained DC current when mounted with adequate heat sinking.
The 1N5350A/TR12 features a void-free UL94V-0 epoxy case, cathode band polarity marking, and moisture sensitivity level 1 per J-STD-020B-requiring no dry pack. It withstands 8.3 ms half-sine surge currents up to 7.0 A and maintains <1 μA reverse leakage at VR = 10.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±10% - defines nominal regulation point; high-end VZM = 14.3 V sets IZM calculation limit |
| Test Current (IZT) | 100 mA - standardized bias point for measuring VZ and ZZ; ensures repeatable characterization |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - low series resistance enables tight voltage regulation under varying load current |
| Max Regulator Current (IZM) | 100 mA - maximum continuous DC current at TL = 25 °C; derates linearly above 25 °C |
| Surge Current (IZSM) | 7.0 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - determines temperature rise under power dissipation |
| Reverse Leakage (IR) | 1.0 μA max at VR = 10.1 V - ensures minimal standby power loss in high-impedance bias networks |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, matte-tin plated leads per MIL-STD-750 Method 2026, cathode indicated by colored band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; forms return path during Zener operation |
| Cathode | Zener regulation terminal / Voltage reference output | Banded end; connected to regulated node; reverse-biased to maintain 13 V reference |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures cross-manufacturer interchangeability and standardized mechanical/electrical definitions |
| ±10% voltage tolerance (A suffix) | Cost-optimized regulation accuracy suitable for non-critical reference and clamp applications |
| RoHS-compliant (e3 suffix implied) | Meets global environmental compliance without lead-based solder compatibility compromise |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during manual assembly |
Applications
| Power Supply Feedback Loop | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in discrete linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Voltage reference element providing precise 13 V setpoint for error comparator input. Use Value: Maintains ±10% output regulation despite line/load variations due to low ΔVZ (0.25 V) and stable VZ over temperature. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 12 V rail systems. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when rail exceeds 14.3 V (VZM). Use Value: Absorbs 7.0 A surge (8.3 ms) without degradation, enabling robust system-level ESD/surge immunity. |
| Industrial Sensor Excitation | Reference Voltage Generator |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift DC reference source powering Wheatstone bridges with minimal self-heating. Use Value: Delivers 13 V ±10% with <1 μA leakage at 10.1 V, minimizing measurement offset in high-impedance sensor interfaces. | Use Scenario: Generating fixed bias points for op-amp comparators or ADC reference dividers in embedded controllers. IC Role / Device Role / Timing Role: Passive precision reference node establishing known voltage thresholds. Use Value: Achieves 2.5 Ω dynamic impedance at 100 mA, ensuring minimal voltage shift under varying divider loading conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5350B/TR12 | ±5% VZ tolerance (vs. ±10%); same VZ nominal, package, and IZM | Higher accuracy required in feedback loops where tighter output regulation is critical | Select when design requires reduced VZ variation across production lots or temperature |
| MMBZ5243B-7-F | Surface-mount SOD-123 package; 13 V ±5%, 225 mW Pd (vs. 5 W); different thermal profile | Space-constrained PCBs where axial leads are incompatible with layout or automated assembly | Choose only if power dissipation ≤225 mW suffices and board real estate prohibits axial mounting |
Compared with 1N5350A/TR12, the 1N5350B/TR12 offers improved voltage accuracy at identical power handling, while MMBZ5243B-7-F trades substantial power capacity for miniaturization-making it unsuitable for sustained 100 mA operation but viable for low-current biasing.
Availability
1N5350A/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and sensor excitation systems requiring stable component supply and long-term obsolescence management.
Supply support for 1N5350A/TR12 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 1N53xxA/B series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized mechanical interoperability.
FAQ
What is the Zener voltage tolerance for 1N5350A/TR12?
The 1N5350A/TR12 has a nominal Zener voltage of 13 V with ±10% tolerance, as designated by the "A" suffix per Microsemi documentation. This means the actual VZ falls between 11.7 V and 14.3 V at 100 mA test current and 25 °C lead temperature. The tolerance directly impacts regulation accuracy in feedback and clamp applications.
What is the maximum continuous current rating for 1N5350A/TR12?
The 1N5350A/TR12 is rated for a maximum continuous Zener current (IZM) of 100 mA at TL = 25 °C with 3/8″ (10 mm) lead length from the body. Power dissipation must be limited to 5 W, and current must be derated linearly above 25 °C using the 25 °C/W thermal resistance specification to avoid junction overheating.
Does 1N5350A/TR12 require dry packing before PCB assembly?
No, the 1N5350A/TR12 has moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture during ambient storage to require dry packing or floor-life controls prior to reflow or hand soldering. This simplifies inventory handling and eliminates bake-out steps in manufacturing.
What is the surge current capability of 1N5350A/TR12?
The 1N5350A/TR12 supports a peak non-repetitive surge current (IZSM) of 7.0 A for an 8.3 ms half-sine waveform. This rating enables reliable transient voltage suppression in automotive and industrial environments where load dump or ESD events may exceed steady-state operating limits without damaging the device.
How is polarity marked on the 1N5350A/TR12 package?
The 1N5350A/TR12 uses a cathode band marking on its axial T-18 epoxy body to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown and regulation. Incorrect polarity results in forward conduction (~1.2 V drop) rather than voltage regulation.
1N5350A/TR12 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/TR12 FAQ
1.How can I place an order for 1N5350A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350A/TR12 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/TR12 reliable?
The price and inventory of 1N5350A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5350A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350A/TR12?
1N5350A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350A/TR12 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/TR12?
For technical support, including 1N5350A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350A/TR12 requirements.
6.How does Aetrix verify that 1N5350A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5350A/TR12 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/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5350A/TR12?
All 1N5350A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350A/TR12, 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/TR12 part is unused and in its original packaging.
Return procedure for 1N5350A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350A/TR12 Tags
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