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Microchip Technology 1N5344CE3/TR8
- Part No.:
- 1N5344CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344CE3/TR8.pdf
- Description:
- DIODE ZENER 8.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
1N5344CE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 8.2 V, ±2% tolerance (C suffix), 150 mA maximum Zener current (IZM), 150 Ω dynamic impedance (ZZ) at 150 mA test current, and operates from –65°C to +150°C. It serves as a precision voltage reference or shunt regulator in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5344CE3/TR8 datasheet, 1N5344CE3/TR8 pinout, 1N5344CE3/TR8 application, or 1N5344CE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (10 A), reverse leakage (10 µA @ 6.2 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal shunt voltage regulator, operating in reverse breakdown with stable VZ maintained across a broad current range (10–150 mA). Its low dynamic impedance (150 Ω) and tight ±2% voltage tolerance ensure minimal output variation under load and line changes.
The 1N5344CE3/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 5 W steady-state dissipation at 25°C lead temperature and derated linearly above that point. Thermal resistance is specified at 25 °C/W junction-to-lead (3/8" lead length) and 85 °C/W junction-to-ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±2% - precise reference for feedback networks requiring stable setpoint accuracy |
| Test Current (IZT) | 150 mA - defines operating point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 150 Ω max @ IZT - low AC impedance ensures minimal voltage shift under varying load currents |
| Max Reverse Leakage (IR) | 10 µA @ 6.2 V - low off-state current minimizes standby power loss in regulation paths |
| Max Zener Current (IZM) | 1000 mA - peak DC current capability when adequately heat-sunk (5 W / 8.2 V ≈ 610 mA; value adjusted for ±2% tolerance) |
| Surge Current (IZSM) | 10 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Voltage Regulation (ΔVZ) | 0.20 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case with void-free thermosetting epoxy body (UL94V-0), cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS compliant, e3 suffix), solderable per MIL-STD-750 Method 2026.
| 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 stable 8.2 V relative to anode during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in feedback or sensing paths |
| JEDEC-registered 1N53xxB series | Guarantees standardized mechanical dimensions, thermal performance, and electrical behavior across qualified suppliers |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for standard SMT/reflow or hand-soldering |
| 10 A surge current rating | Provides robust transient immunity in industrial power rails and automotive load-dump scenarios |
| RoHS-compliant e3 suffix | Meets global environmental compliance mandates with matte-tin plating and halogen-free epoxy encapsulation |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing precise 8.2 V threshold to TL431-like control IC or discrete comparator input. Use Value: Tight ±2% tolerance ensures output regulation within ±1% over line/load/temperature, reducing need for post-production calibration. | Use Scenario: Clamps transient spikes on 12 V automotive or industrial DC bus lines during load dump or inductive switching. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when bus exceeds 8.2 V. Use Value: 10 A surge rating and low ΔVZ (0.20 V) maintain clamping stability during repetitive transients without thermal runaway. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Sets reference voltage for DAC output buffers, ADC reference dividers, or analog sensor signal conditioning stages. IC Role / Device Role / Timing Role: Stable 8.2 V source feeding precision resistor networks or op-amp reference inputs. Use Value: Low 150 Ω dynamic impedance minimizes voltage droop under varying reference current draw (e.g., 1–10 mA). | Use Scenario: Establishes bias current for BJT/MOSFET gate drivers or LED constant-current sinks in industrial lighting controls. IC Role / Device Role / Timing Role: Zener-based current mirror reference or emitter-degeneration voltage setpoint. Use Value: Stable VZ over –65°C to +150°C enables reliable biasing in wide-temperature environments without drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B | Same 8.2 V nominal VZ, but ±5% tolerance (B suffix) vs. ±2% (C suffix); otherwise identical ratings and package | Acceptable where tighter regulation is not required; lower cost for non-critical references | Select 1N5344B if system-level tolerance budget allows ≥±5% output variation |
| MMSZ5231ET1G | Surface-mount SOD-123 package; 8.2 V ±5%, 500 mW rating (vs. 5 W); 30 Ω ZZ; 100 mA IZM | Not suitable for high-power regulation or surge handling; limited to low-current bias/reference roles | Choose MMSZ5231ET1G only for space-constrained PCBs with <100 mA Zener current requirements |
Compared with 1N5344B and MMSZ5231ET1G, the 1N5344CE3/TR8 delivers superior thermal robustness (5 W vs. 0.5 W), tighter voltage accuracy (±2% vs. ±5%), and higher surge resilience (10 A vs. ~1 A), making it optimal for industrial-grade power regulation where reliability and precision coexist.
Availability
1N5344CE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5344CE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized manufacturability across military and commercial grades.
FAQ
What is the Zener voltage tolerance of the 1N5344CE3/TR8?
The 1N5344CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 8.036 V to 8.364 V at 150 mA test current and 25°C lead temperature, enabling high-accuracy reference applications without external trimming.
How does the 1N5344CE3/TR8 handle thermal stress in high-power operation?
The 1N5344CE3/TR8 features a thermal resistance of 25 °C/W junction-to-lead (measured at 3/8" lead length), allowing it to dissipate its full 5 W rating when leads are properly heat-sunk. Derating begins linearly above 25°C lead temperature, maintaining safe operation up to +150°C junction temperature per specification.
Is the 1N5344CE3/TR8 suitable for automotive load-dump protection?
Yes-the 1N5344CE3/TR8 supports 10 A non-repetitive surge current (8.3 ms half-sine), meeting typical ISO 7637-2 load-dump pulse requirements. Its –65°C to +150°C operating range and RoHS-compliant e3 construction further align with automotive under-hood deployment needs.
What does the "TR8" suffix indicate in 1N5344CE3/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm tape width and component orientation optimized for automated pick-and-place assembly. The base part remains 1N5344CE3, retaining all electrical and thermal specifications of the bulk version.
Can the 1N5344CE3/TR8 replace a 1N5344B in an existing design?
Yes-1N5344CE3/TR8 is a direct functional replacement for 1N5344B with identical package, pinout, and voltage rating, differing only in tighter ±2% tolerance (vs. ±5%). No layout or schematic changes are needed, though improved regulation accuracy may reduce downstream calibration effort in precision applications.
1N5344CE3/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):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.9 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
1N5344CE3/TR8 FAQ
1.How can I place an order for 1N5344CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344CE3/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 1N5344CE3/TR8 reliable?
The price and inventory of 1N5344CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5344CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344CE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344CE3/TR8?
1N5344CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344CE3/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 1N5344CE3/TR8?
For technical support, including 1N5344CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344CE3/TR8 requirements.
6.How does Aetrix verify that 1N5344CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5344CE3/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 1N5344CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5344CE3/TR8?
All 1N5344CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344CE3/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 1N5344CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5344CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5344CE3/TR8 Tags
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MM5Z5V1ST1G
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