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Microchip Technology 1N5342CE3/TR8
- Part No.:
- 1N5342CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342CE3/TR8.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,199
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Product details
Overview
1N5342CE3/TR8 from Microsemi is a 6.8 V, ±2% tolerance, 5 W axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply reference and overvoltage protection circuits. It delivers 700 Ω dynamic impedance at 175 mA test current, supports 11.5 A maximum surge current (8.3 ms half-sine), and operates across –65°C to +150°C with cathode-band polarity marking.
For engineers reviewing the 1N5342CE3/TR8 datasheet, 1N5342CE3/TR8 pinout, 1N5342CE3/TR8 application, or 1N5342CE3/TR8 equivalent, key selection criteria include its tight ±2% VZ tolerance (C suffix), 1.0 V maximum forward voltage at 1.0 A, RoHS-compliant matte-tin plating, and T-18 package compatibility with standard axial-lead PCB mounting.
Technical Context
The 1N5342CE3/TR8 functions as a two-terminal shunt regulator, maintaining stable 6.8 V output by conducting reverse current above its breakdown threshold. Its low 25 °C/W junction-to-lead thermal resistance enables reliable 5 W operation with minimal heatsinking when leads are trimmed to 10 mm from body.
It exhibits 1.0 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA and 1.0 V regulation delta (ΔVZ) between 10% and 50% of IZM, confirming high line regulation stability under varying load currents from 17.5 mA to 87.5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±2% - precise reference voltage with C-suffix tolerance for stable feedback loops. |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified; defines nominal regulation condition. |
| Dynamic Impedance (ZZ) | 1.0 Ω - low AC resistance ensures minimal voltage shift under dynamic load transients. |
| Max Surge Current (IZSM) | 11.5 A (8.3 ms half-sine) - withstands brief overvoltage events without failure. |
| Thermal Resistance (RθJL) | 25 °C/W - enables full 5 W dissipation with simple lead-length thermal management. |
| Reverse Leakage (IR) | 10 μA @ 5.2 V - low off-state current preserves efficiency in standby or low-power modes. |
| Forward Voltage (VF) | 1.2 V max @ 1.0 A - supports use as clamp or series rectifier in dual-role designs. |
Pinout & Package
Package: T-18 axial-leaded plastic case per JEDEC DO-204AL; void-free UL94V-0 epoxy body; cathode indicated by band; RoHS-compliant matte-tin plated leads; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential. |
| Cathode | Regulated output node | Banded end; held at precise 6.8 V relative to anode during conduction; used for feedback or clamping. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in analog power supplies. |
| 5.0 W steady-state power rating | Supports robust regulation in industrial DC-DC converters and battery charge controllers without auxiliary heatsinks. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to assembly-reduces manufacturing cost and risk. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Permits handling in standard environments without special static control-lowers production overhead. |
| RoHS-compliant e3 suffix | Meets global environmental compliance mandates without performance trade-offs or requalification effort. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt reference element providing precise 6.8 V setpoint to optocoupler or TL431 error amplifier. Use Value: ±2% VZ tolerance ensures consistent output voltage accuracy across temperature and line variations. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient surges exceeding 6.8 V. IC Role / Device Role / Timing Role: Bidirectional clamp limiting reverse voltage to safe levels while blocking forward conduction. Use Value: 11.5 A surge rating absorbs 8.3 ms transients without degradation-extends system reliability in noisy industrial environments. |
| DC Link Voltage Monitor | Programmable Threshold Detector |
Use Scenario: Monitoring 12 V rail integrity in automotive body control modules using resistor-divider + comparator. IC Role / Device Role / Timing Role: Precision Zener reference generating stable 6.8 V threshold for comparator trip point. Use Value: Low ΔVZ (1.0 V) ensures consistent trip voltage across operating current range-reduces false triggers. |
Use Scenario: Configuring adjustable brown-out detection in embedded systems via resistor network. IC Role / Device Role / Timing Role: Fixed-voltage node defining lower bound of programmable window comparator. Use Value: Tight 1.0 Ω ZZ minimizes voltage drift under varying divider current-improves detection repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5342B | ±5% VZ tolerance; same 6.8 V nominal, 175 mA IZT, and T-18 package. | Acceptable where ±5% regulation accuracy suffices-e.g., non-critical biasing or coarse clamping. | Select 1N5342B only if cost sensitivity outweighs precision requirements; no layout change needed. |
| MMSZ5234ET1G | Surface-mount SOD-123 package; 6.8 V ±5%; 500 mW rating; 100 mA IZT; 10 Ω ZZ. | Limited to low-power signal-level clamping or portable electronics due to 0.5 W power limit. | Choose MMSZ5234ET1G only for space-constrained PCBs where 5 W capability is unnecessary. |
Compared with 1N5342CE3/TR8, the 1N5342B offers lower cost but sacrifices 3% absolute voltage accuracy, while MMSZ5234ET1G reduces footprint at the expense of 90% power handling and degraded regulation stability-making 1N5342CE3/TR8 optimal for industrial-grade 5 W reference and clamp roles.
Availability
1N5342CE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and ruggedized instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5342CE3/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 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, ESD immunity, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5342CE3/TR8?
The 1N5342CE3/TR8 has a ±2% Zener voltage tolerance, designated by the "C" suffix in its part number. This means its actual breakdown voltage falls within 6.664 V to 6.936 V at 25°C when tested at 175 mA. This tighter tolerance supports high-accuracy applications such as precision power supply feedback networks and calibrated voltage references where ±5% devices like the 1N5342B would introduce unacceptable error.
Can the 1N5342CE3/TR8 be used in surface-mount designs?
No, the 1N5342CE3/TR8 uses a through-hole T-18 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5342B (SMB package, 5 W) or MMSZ5234ET1G (SOD-123, 0.5 W). The 1N5342CE3/TR8 requires axial-lead PCB footprints with 0.180"–0.220" lead spacing and adequate copper pour for thermal management.
What is the maximum continuous power dissipation for the 1N5342CE3/TR8?
The 1N5342CE3/TR8 is rated for 5.0 W steady-state power dissipation at 25°C lead temperature (TL), provided leads are trimmed to 10 mm (3/8") from the body. Derating is required above 25°C-approximately 40 mW/°C reduction beyond that point. On FR4 board with 4 mm² copper pads, its usable power drops to 1.47 W at 25°C ambient due to higher junction-to-ambient thermal resistance (85°C/W).
Does the 1N5342CE3/TR8 require dry packing or baking before soldering?
No, the 1N5342CE3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and does not require dry packing, vacuum sealing, or pre-soldering bake-out. This simplifies inventory handling and eliminates moisture-related popcorning risks during reflow or wave soldering-reducing process complexity and yield loss.
How is polarity identified on the 1N5342CE3/TR8?
The 1N5342CE3/TR8 uses a cathode band marking: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown. During forward bias, the device conducts with ≤1.2 V drop at 1.0 A. Correct orientation is critical-reverse installation prevents regulation and may cause open-circuit behavior in shunt configurations.
1N5342CE3/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):
- 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/TR8 FAQ
1.How can I place an order for 1N5342CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342CE3/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 1N5342CE3/TR8 reliable?
The price and inventory of 1N5342CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5342CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342CE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342CE3/TR8?
1N5342CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342CE3/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 1N5342CE3/TR8?
For technical support, including 1N5342CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342CE3/TR8 requirements.
6.How does Aetrix verify that 1N5342CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5342CE3/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 1N5342CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5342CE3/TR8?
All 1N5342CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342CE3/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 1N5342CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5342CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342CE3/TR8 Tags
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