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Microchip Technology 1N5344C/TR8
- Part No.:
- 1N5344C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344C/TR8.pdf
- Description:
- DIODE ZENER 8.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
1N5344C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 14 V, ±2% tolerance (C suffix), 100 mA maximum Zener current (IZM), 2.5 Ω dynamic impedance (ZZ) at 175 mA test current, and operates from –65 °C to +150 °C. It provides stable voltage reference in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the 1N5344C/TR8 datasheet, 1N5344C/TR8 pinout, 1N5344C/TR8 application, or 1N5344C/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), voltage regulation (ΔVZ = 0.25 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its Zener voltage is specified at 175 mA (IZT), with dynamic impedance measured at 1 kHz AC superimposed on DC bias. Voltage regulation (ΔVZ) is defined as the difference between voltages measured at 10% and 50% of IZM.
The 1N5344C/TR8 uses void-free thermosetting epoxy encapsulation (UL94V-0), features cathode band polarity marking, and is rated for 260 °C soldering (10 s max). Thermal performance depends on lead length: 25 °C/W junction-to-lead at 3/8″ (10 mm) from body, or 85 °C/W junction-to-ambient on FR4 with defined copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V ±2% - precise reference for feedback and clamping at nominal 175 mA bias |
| Power Dissipation | 5.0 W at TL = 25 °C - requires heatsinking above 25 °C lead temperature |
| Dynamic Impedance (ZZ) | 2.5 Ω at IZT = 175 mA - low impedance ensures minimal voltage shift under load variation |
| Max Reverse Current (IR) | 1.0 μA at VR = 10.1 V - tight leakage enables stable regulation near knee region |
| Surge Current (IZSM) | 6.7 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ at 10% and 50% of IZM, indicating line regulation stability |
| Thermal Resistance | 25 °C/W junction-to-lead - defines required thermal path for sustained 5 W operation |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS-compliant per e3 suffix), solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / regulation output node | Banded end; connected to regulated voltage rail; must be held positive relative to anode for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter regulation in feedback paths without external trimming components |
| JEDEC-registered 1N53xxB series | Guarantees mechanical and electrical interchangeability across qualified suppliers |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protective packaging during assembly |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference element setting error amplifier threshold. Use Value: ±2% tolerance ensures output accuracy within ±1.5% over line/load/temperature without calibration. | Use Scenario: Clamps transient surges on 12 V automotive control bus lines during load dump events. IC Role / Device Role / Timing Role: Two-terminal shunt protector absorbing energy above safe threshold. Use Value: 6.7 A surge rating and 5 W steady-state dissipation handle ISO 7637-2 Pulse 5a without failure. |
| Reference Voltage Generator | Industrial Sensor Biasing |
Use Scenario: Provides stable 14 V reference for analog front-end instrumentation amplifiers in PLC modules. IC Role / Device Role / Timing Role: Low-drift DC voltage source for ADC reference scaling and sensor excitation. Use Value: 0.25 V ΔVZ and 2.5 Ω ZZ ensure <0.2% reference error across 10–100 mA load current range. | Use Scenario: Biases bridge-type pressure sensors in harsh-environment industrial transmitters. IC Role / Device Role / Timing Role: Temperature-stable excitation source maintaining constant bridge current. Use Value: –65 °C to +150 °C operating range supports operation in unheated outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B/TR8 | ±5% tolerance (B suffix) vs. ±2% (C suffix); otherwise identical electrical specs and package | Acceptable where tighter regulation not required; lower cost in high-volume production | Select 1N5344B/TR8 when system-level calibration compensates for wider tolerance |
| MMBZ5241ET1G | Surface-mount SOD-123 package; 14 V ±5%; 0.5 W rating; 20 Ω ZZ at 20 mA | Not suitable for 5 W continuous dissipation; limited to low-power biasing or signal clamping | Choose MMBZ5241ET1G only for space-constrained PCBs where power <0.5 W suffices |
Compared with 1N5344B/TR8 and MMBZ5241ET1G, the 1N5344C/TR8 delivers superior voltage accuracy and thermal robustness for high-reliability 5 W regulation tasks, while the alternatives trade precision or power capability for cost or footprint reduction.
Availability
1N5344C/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5344C/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 1N53xx series was designed specifically for ruggedized 5 W Zener regulation in environments demanding wide temperature operation, high surge immunity, and JEDEC-standard mechanical compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5344C/TR8?
The 1N5344C/TR8 has a Zener voltage tolerance of ±2%, designated by the "C" suffix per Microsemi's datasheet. This means its nominal 14.0 V regulation falls within 13.72 V to 14.28 V at 175 mA test current and 25 °C lead temperature. The tolerance remains valid across the full operating temperature range of –65 °C to +150 °C, as confirmed in the Electrical Characteristics table on page 1 of the official datasheet.
How does the 1N5344C/TR8 handle thermal management in high-power operation?
The 1N5344C/TR8 achieves 5 W dissipation via low thermal resistance: 25 °C/W junction-to-lead when leads are trimmed to 3/8″ (10 mm) from the epoxy body. When mounted on FR4 with specified copper pads, junction-to-ambient rises to 85 °C/W. Engineers must limit lead temperature (TL) to ≤25 °C for full 5 W rating; derating is linear beyond that point per Figure 1. The 1N5344C/TR8's design assumes adequate heatsinking for sustained operation.
Is the 1N5344C/TR8 RoHS compliant?
Yes, the 1N5344C/TR8 is RoHS compliant, indicated by the "e3" suffix in its full ordering designation (1N5344C/TR8-e3 per Microsemi documentation). Its leads feature annealed matte-tin plating conforming to MIL-STD-750 Method 2026, and the void-free thermosetting epoxy body meets UL94V-0 flammability standards. No lead or other restricted substances exceed EU RoHS limits.
What is the maximum surge current rating for the 1N5344C/TR8?
The 1N5344C/TR8 has a maximum non-recurrent surge current (IZSM) rating of 6.7 A, defined as the peak of an 8.3 ms half-sine waveform. This value is verified per Microsemi's datasheet (page 1, Electrical Characteristics table) and reflects the device's ability to absorb transient energy without parametric shift or catastrophic failure. Surge testing follows JEDEC standard conditions and applies to the full 1N53xxB family.
Can the 1N5344C/TR8 replace the 1N5344B/TR8 in existing designs?
The 1N5344C/TR8 can replace the 1N5344B/TR8 mechanically and electrically, as both share identical package (T-18), pinout, power rating (5 W), and Zener voltage nominal (14 V). The sole functional difference is tighter ±2% tolerance (C) versus ±5% (B), which improves regulation accuracy without requiring layout changes. No requalification is needed unless the original design relied on the wider tolerance band for margin.
1N5344C/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
1N5344C/TR8 FAQ
1.How can I place an order for 1N5344C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344C/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 1N5344C/TR8 reliable?
The price and inventory of 1N5344C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5344C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344C/TR8?
1N5344C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344C/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 1N5344C/TR8?
For technical support, including 1N5344C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344C/TR8 requirements.
6.How does Aetrix verify that 1N5344C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5344C/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 1N5344C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5344C/TR8?
All 1N5344C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344C/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 1N5344C/TR8 part is unused and in its original packaging.
Return procedure for 1N5344C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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