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Microchip Technology 1N5343CE3/TR13
- Part No.:
- 1N5343CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343CE3/TR13.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,565
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Product details
Overview
1N5343CE3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 7.5 V ±2%, 175 mA test current (IZT), 1.5 Ω maximum dynamic impedance (ZZ), and 630 mA maximum Zener current (IZM) at TL = 25°C. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5343CE3/TR13 datasheet, 1N5343CE3/TR13 pinout, 1N5343CE3/TR13 application, or 1N5343CE3/TR13 equivalent, key selection criteria include ±2% voltage tolerance, low 1.5 Ω dynamic impedance at 175 mA, 630 mA IZM capability with adequate heatsinking, RoHS-compliant matte-tin plating, and T-18 axial package compatibility with standard through-hole PCB layouts.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and line conditions. Its 7.5 V nominal Zener voltage is specified at 175 mA IZT with ±2% tolerance (C suffix), and it exhibits minimal voltage variation (ΔVZ = 0.15 V) between 10% and 50% of IZM.
The device features 25 °C/W junction-to-lead thermal resistance at 3/8" lead length, enabling reliable 5.0 W dissipation when mounted with proper heatsinking. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, eliminating dry-pack requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±2% - precise regulation point for feedback networks requiring tight voltage stability |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 1.5 Ω max - low AC resistance ensures minimal output voltage ripple under dynamic load changes |
| Max Zener Current (IZM) | 630 mA - maximum continuous DC current at TL = 25°C with appropriate heatsinking |
| Power Dissipation | 5.0 W at TL < 25°C - rated steady-state power handling with 3/8" lead length heatsinking |
| Operating Temperature | –65°C to +150°C - suitable for industrial and automotive under-hood environments |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; cathode indicated by band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail in Zener shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input voltage source and load; maintains 7.5 V relative to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in feedback circuits |
| Low 1.5 Ω dynamic impedance at 175 mA | Reduces output voltage deviation under transient load steps in linear regulators and clamps |
| 630 mA maximum Zener current (IZM) | Supports robust overvoltage clamping in 5 W power stages with margin for surge events |
| Moisture Sensitivity Level 1 | Eliminates baking requirements before PCB assembly, reducing manufacturing cost and risk |
| RoHS-compliant e3 suffix | Meets global environmental compliance mandates without performance trade-offs |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides precise 7.5 V reference for optocoupler-based feedback in isolated DC-DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input in secondary-side control loop. Use Value: ±2% tolerance and 0.15 V ΔVZ ensure stable output voltage regulation across line and load variations. | Use Scenario: Supplies stable bias voltage to bridge-based pressure or temperature transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision analog reference source for ratiometric sensor excitation and ADC reference scaling. Use Value: Low 1.5 Ω dynamic impedance minimizes reference drift under varying sensor current draw. |
| Overvoltage Clamp Protection | Programmable Voltage Monitor Threshold |
Use Scenario: Clamps transient surges on 12 V rail in automotive body control modules during load dump events. IC Role / Device Role / Timing Role: Passive shunt protector diverting excess energy to ground above 7.5 V threshold. Use Value: 630 mA IZM and 5 W power rating sustain repeated 8.3 ms surge pulses without degradation. | Use Scenario: Sets trip point for comparator-based brown-out detection in embedded microcontroller power domains. IC Role / Device Role / Timing Role: Fixed-voltage threshold generator for reset logic activation at 7.5 V ±2%. Use Value: Tight tolerance eliminates need for calibration, ensuring consistent reset behavior across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Same 7.5 V nominal VZ but ±5% tolerance (B suffix); identical IZT, ZZ, IZM, and package | Lower accuracy required in non-critical biasing or coarse clamping roles | Select when ±5% regulation tolerance is acceptable and cost optimization is prioritized |
| MMSZ5233BT1G | Surface-mount SOD-123 package; 7.5 V ±5%; 200 mW power rating; 10 mA IZT; 30 Ω ZZ | Low-power, space-constrained designs where 5 W dissipation is unnecessary | Choose for compact PCB layouts with <200 mW regulation needs; not a drop-in replacement |
Compared with 1N5343B and MMSZ5233BT1G, the 1N5343CE3/TR13 delivers superior voltage accuracy (±2% vs. ±5%), higher power handling (5 W vs. 200 mW), and lower dynamic impedance (1.5 Ω vs. 30 Ω), making it optimal for high-reliability, high-current Zener regulation where precision and robustness are critical.
Availability
1N5343CE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, industrial sensor reference, and overvoltage clamp protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5343CE3/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing components for aerospace, defense, and industrial markets.
The 1N53xxB series is designed for precision voltage regulation in demanding power management and protection applications, emphasizing wide temperature operation, high surge resilience, and JEDEC-standardized reliability.
FAQ
What is the Zener voltage tolerance of the 1N5343CE3/TR13?
The 1N5343CE3/TR13 has a Zener voltage tolerance of ±2%, designated by the "C" suffix in the part number. This means its nominal 7.5 V regulation voltage falls within 7.35 V to 7.65 V at 175 mA test current and 25°C lead temperature. This tighter tolerance supports high-accuracy applications such as precision feedback loops and calibrated reference circuits where ±5% variants like the 1N5343B would introduce unacceptable error.
What is the maximum continuous Zener current for the 1N5343CE3/TR13?
The 1N5343CE3/TR13 supports a maximum continuous Zener current (IZM) of 630 mA when operated at a lead temperature (TL) of 25°C with adequate heatsinking-typically achieved using 3/8" (10 mm) lead length from the body. This rating assumes 5.0 W power dissipation capacity; derating applies above 25°C per the published thermal curve. Exceeding IZM risks thermal runaway and permanent parametric shift.
Does the 1N5343CE3/TR13 require dry packing before PCB assembly?
No, the 1N5343CE3/TR13 does not require dry packing prior to PCB assembly. It carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, meaning it is not moisture-sensitive and may be stored and processed under standard ambient conditions without baking. This simplifies manufacturing flow and eliminates moisture-related popcorning risks during reflow or wave soldering.
What package type and marking does the 1N5343CE3/TR13 use?
The 1N5343CE3/TR13 uses the T-18 axial-leaded package (JEDEC DO-41 outline) with void-free thermosetting epoxy body compliant with UL94V-0. The cathode is marked by a visible band on the body, and the full part number "1N5343CE3" is laser-marked or molded onto the device surface. The "TR13" suffix indicates tape-and-reel packaging per EIA-296 standard, with 13-inch reels.
How does the dynamic impedance of the 1N5343CE3/TR13 affect its regulation performance?
With a maximum dynamic impedance (ZZ) of 1.5 Ω at 175 mA test current, the 1N5343CE3/TR13 exhibits minimal change in Zener voltage under varying load currents. This low ZZ directly translates to tighter regulation-e.g., a 100 mA load step induces only ~0.15 V output deviation-making it suitable for applications demanding stable reference voltages despite dynamic current demands, such as in closed-loop power supply feedback networks.
1N5343CE3/TR13 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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.4 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
1N5343CE3/TR13 FAQ
1.How can I place an order for 1N5343CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343CE3/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 1N5343CE3/TR13 reliable?
The price and inventory of 1N5343CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5343CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5343CE3/TR13 transactions.
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4.How is shipping managed for 1N5343CE3/TR13?
1N5343CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5343CE3/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 1N5343CE3/TR13?
For technical support, including 1N5343CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343CE3/TR13 requirements.
6.How does Aetrix verify that 1N5343CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5343CE3/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 1N5343CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5343CE3/TR13?
All 1N5343CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343CE3/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 1N5343CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5343CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5343CE3/TR13 Tags
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