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Microchip Technology 1N5342CE3/TR12
- Part No.:
- 1N5342CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342CE3/TR12.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,987
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Product details
Overview
1N5342CE3/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 6.8 V, ±1% tolerance (C suffix), 175 mA test current (IZT), 1.0 Ω maximum dynamic impedance (ZZ), and 700 mA maximum Zener current (IZM) at TL = 25°C. It regulates voltage in power supply feedback loops and overvoltage protection circuits across industrial control systems.
For engineers reviewing the 1N5342CE3/TR12 datasheet, 1N5342CE3/TR12 pinout, 1N5342CE3/TR12 application, or 1N5342CE3/TR12 equivalent, key selection criteria include tight ±1% voltage tolerance, low 1.0 Ω dynamic impedance at 175 mA, high 700 mA IZM capability with adequate heat sinking, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This Zener operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and line conditions. Its regulation performance is defined by ΔVZ = 0.15 V (difference between voltage at 10% and 50% of IZM), ZZK = 5.2 Ω at 1.0 mA, and VR = 5.2 V for IR ≤ 10 μA.
Thermal design relies on junction-to-lead thermal resistance of 25 °C/W at 10 mm lead length, enabling 5.0 W steady-state dissipation at TL < 25°C. The device meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and withstands 8.3 ms half-sine surge currents up to 200 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±1% - precise reference for feedback networks requiring minimal drift |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified; defines optimal regulation zone |
| Dynamic Impedance (ZZ) | 1.0 Ω max - low AC resistance ensures minimal output voltage variation under dynamic load changes |
| Max Zener Current (IZM) | 700 mA - maximum continuous DC current before thermal runaway when adequately heat sunk |
| Reverse Current (IR) | 10 μA max at VR = 5.2 V - low leakage preserves regulation accuracy in high-impedance bias networks |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ measured at 70 mA and 350 mA, indicating regulation linearity |
| Surge Current (IZSM) | 200 A peak - non-repetitive 8.3 ms half-sine capability for transient overvoltage clamping |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, cathode indicated by band, 0.7 g weight, leads solderable at 260°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input rail through series resistor and to load to maintain 6.8 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±1% Zener voltage tolerance | Enables precision feedback without external trimming in 5 V–12 V SMPS designs |
| Low 1.0 Ω dynamic impedance | Minimizes output ripple in high-frequency switching environments (e.g., >100 kHz PWM controllers) |
| RoHS-compliant matte-tin plating | Ensures reliable solderability and intermetallic formation per MIL-STD-750 Method 2026 |
| JEDEC DO-204AL (T-18) package | Supports manual and wave soldering; 10 mm lead length enables 25 °C/W thermal path to heatsink |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during board assembly and field service |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Shunt reference providing precise 6.8 V threshold to TL431-like comparator or optocoupler LED drive circuit. Use Value: ±1% VZ tolerance maintains ±1.5% overall output regulation without calibration, reducing BOM count. | Use Scenario: Clamping transient surges on 12 V automotive accessory rails exposed to load-dump events. IC Role / Device Role / Timing Role: Parallel-connected Zener absorbing energy above 6.8 V while diverting current away from downstream ICs. Use Value: 200 A surge rating handles ISO 7637-2 Pulse 5a without degradation; low ΔVZ ensures predictable clamping onset. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Generating stable excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Precision shunt reference feeding op-amp buffer to drive 100 Ω–1 kΩ sensor loads. Use Value: 1.0 Ω ZZ and 0.15 V ΔVZ limit reference drift to <0.3% over 10:1 load current range. | Use Scenario: Providing regulated bias to RTD or strain gauge signal conditioning front-ends in harsh factory environments. IC Role / Device Role / Timing Role: Low-drift voltage source referenced to system ground, operating from unregulated 15–24 V DC bus. Use Value: -65°C to +150°C operating range and 25 °C/W thermal resistance enable reliable operation on hot control cabinet PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5342B | Same VZ (6.8 V) but ±5% tolerance; higher ZZ = 1.0 Ω (same), identical IZM = 700 mA | Acceptable where ±5% regulation suffices; lower cost; no RoHS compliance (SnPb leads) | Select when cost sensitivity outweighs precision and environmental compliance requirements |
| MMSZ5234ET1G | Surface-mount SOD-123; same 6.8 V ±5%; lower power (500 mW); IZT = 20 mA; ZZ = 5.0 Ω | For space-constrained PCBs; unsuitable for >100 mA continuous regulation; requires different thermal layout | Choose only for low-power, high-density layouts where 5 W dissipation is unnecessary |
Compared with 1N5342B and MMSZ5234ET1G, the 1N5342CE3/TR12 delivers superior precision (±1% vs ±5%), full 5 W capability, and RoHS compliance-making it optimal for industrial-grade power regulation where long-term stability and regulatory alignment are mandatory.
Availability
1N5342CE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable logic controller (PLC) analog input stages requiring stable component supply and long-lifecycle support.
Supply support for 1N5342CE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed as a JEDEC-registered family of 5 W axial Zeners to deliver precision voltage regulation with military-grade screening options, wide temperature operation, and robust surge immunity for mission-critical power systems.
FAQ
What is the Zener voltage tolerance of the 1N5342CE3/TR12?
The 1N5342CE3/TR12 has a Zener voltage tolerance of ±1%, denoted by the "C" suffix in its part number. This means its actual regulation voltage falls within 6.732 V to 6.868 V at 175 mA test current and 25°C lead temperature. This tight tolerance supports high-accuracy feedback in regulated power supplies without additional calibration circuitry.
Can the 1N5342CE3/TR12 be used in surface-mount designs?
No, the 1N5342CE3/TR12 uses an axial-leaded T-18 (DO-204AL) package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5342B or SMBG5342B series. The 1N5342CE3/TR12 requires through-hole mounting with 10 mm lead length to achieve its rated 25 °C/W thermal resistance.
What is the maximum surge current rating for the 1N5342CE3/TR12?
The 1N5342CE3/TR12 has a maximum non-repetitive surge current (IZSM) rating of 200 A for an 8.3 ms half-sine waveform. This rating is verified per Microsemi's characterization and enables the 1N5342CE3/TR12 to absorb transient overvoltages in industrial and automotive environments without failure.
How does the 1N5342CE3/TR12 handle thermal management?
The 1N5342CE3/TR12 achieves 25 °C/W junction-to-lead thermal resistance when mounted with 10 mm lead length from the body, allowing full 5.0 W dissipation at TL < 25°C. When mounted on FR4 with 4 mm² copper pads, its junction-to-ambient resistance rises to 85 °C/W, limiting steady-state power to 1.47 W at TA = 25°C. Proper lead bending and heatsinking are essential for high-current operation.
Is the 1N5342CE3/TR12 RoHS compliant?
Yes, the 1N5342CE3/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its part number. Its leads feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free thermosetting epoxy body meets UL94V-0 flammability standards. Full compliance documentation is available from Microchip Technology's product change notices.
1N5342CE3/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):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4.9 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
1N5342CE3/TR12 FAQ
1.How can I place an order for 1N5342CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342CE3/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 1N5342CE3/TR12 reliable?
The price and inventory of 1N5342CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5342CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342CE3/TR12 transactions.
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4.How is shipping managed for 1N5342CE3/TR12?
1N5342CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342CE3/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 1N5342CE3/TR12?
For technical support, including 1N5342CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342CE3/TR12 requirements.
6.How does Aetrix verify that 1N5342CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5342CE3/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 1N5342CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5342CE3/TR12?
All 1N5342CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342CE3/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 1N5342CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5342CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342CE3/TR12 Tags
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