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Microchip Technology 1N5344BE3/TR8
- Part No.:
- 1N5344BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344BE3/TR8.pdf
- Description:
- DIODE ZENER 8.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,828
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Product details
Overview
1N5344BE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 8.2 V ±5%, 150 mA maximum Zener current (IZM), 1.5 Ω dynamic impedance (ZZ) at 150 mA test current, and operates across –65 °C to +150 °C. It delivers stable voltage reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5344BE3/TR8 datasheet, 1N5344BE3/TR8 pinout, 1N5344BE3/TR8 application, or 1N5344BE3/TR8 equivalent, key selection criteria include its ±5% tolerance, 5 W steady-state power rating at lead temperature <25 °C, low 1.5 Ω impedance at IZT = 150 mA, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with tightly controlled knee characteristics, specified for regulation at 150 mA test current (IZT). Its thermal resistance is 25 °C/W junction-to-lead (3/8″ lead length) and 85 °C/W junction-to-ambient on FR4 board.
Voltage regulation (ΔVZ) is defined as the difference between voltages measured at 10% and 50% of IZM - 0.20 V for 1N5344BE3/TR8 - and surge current rating is 10 A (8.3 ms half-sine). Polarity is marked by cathode band; device must be biased with banded end positive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±5% at 150 mA - defines precise regulation point under standard test conditions |
| Power Dissipation | 5.0 W at TL < 25 °C (3/8″ lead length) - sets maximum continuous DC power handling with adequate heatsinking |
| Dynamic Impedance (ZZ) | 1.5 Ω at IZT = 150 mA - indicates low AC resistance for stable regulation under varying load current |
| Max Reverse Current (IR) | 10 μA at VR = 5.9 V - confirms low leakage below breakdown threshold |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design using lead as primary heat path |
| Surge Current (IZSM) | 10 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial, automotive, and aerospace environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band, RoHS-compliant matte-tin plated leads, weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower potential node in reverse-bias regulation configuration |
| Cathode | Banded lead | Connected to regulated output or higher potential node; Zener breakdown occurs when cathode is > anode by VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - robust against electrostatic discharge during handling and assembly |
| High Surge Withstand | Rated for 10 A non-recurrent 8.3 ms half-sine surge - protects downstream circuitry from transient overvoltages |
| Stable Regulation Over Temp | ΔVZ = 0.20 V across 10–50% IZM - ensures predictable voltage deviation under load variation |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces precision shunt regulator where cost and simplicity are prioritized. Use Value: Delivers 8.2 V reference with ±5% tolerance and 1.5 Ω dynamic impedance, enabling stable loop response without active compensation. | Use Scenario: Placed across sensitive IC supply rail (e.g., microcontroller VDD) to clamp transients exceeding safe operating voltage. IC Role / Device Role / Timing Role: Passive crowbar element conducting only above 8.2 V, diverting surge energy to ground before damage occurs. Use Value: Withstands 10 A 8.3 ms surges and exhibits only 0.20 V regulation spread, ensuring reliable clamping without false triggering. |
| Industrial Sensor Excitation | Programmable Reference Divider |
Use Scenario: Provides stable excitation voltage for resistive bridge sensors (e.g., strain gauges) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage source referenced to system ground; used with op-amp buffer to drive sensor bridges. Use Value: Maintains regulation within ±5% over –40 °C to +85 °C ambient, supporting 12-bit measurement accuracy in unheated enclosures. | Use Scenario: Configured with external resistors to generate custom reference voltages (e.g., 2.5 V, 4.096 V) for ADCs or DACs. IC Role / Device Role / Timing Role: Primary Zener element in two-resistor divider network; sets upper voltage node of ratio-based reference. Use Value: Low 1.5 Ω dynamic impedance minimizes loading error on divider output, preserving accuracy across load current variations. |
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 | Same 8.2 V ±5% VZ and 5 W rating, but lacks e3 RoHS suffix - uses SnPb plating | Not suitable for RoHS-compliant production; requires exemption documentation | Select 1N5344B only for legacy repair or non-RoHS programs |
| MMBZ5231BS-7-F | Surface-mount SOD-123 package, 8.2 V ±5%, 225 mW Pd - not a direct power replacement | Limited to low-power signal-level regulation; cannot replace 5 W dissipation requirement | Use MMBZ5231BS-7-F only in space-constrained, low-current bias networks |
Compared with 1N5344B and MMBZ5231BS-7-F, the 1N5344BE3/TR8 uniquely combines axial-leaded serviceability, 5 W thermal capability, RoHS compliance, and JEDEC-standardized mounting - making it the only option for high-reliability, through-hole, medium-power Zener regulation.
Availability
1N5344BE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor excitation requiring stable component supply and full RoHS compliance.
Supply support for 1N5344BE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed as a JEDEC-standardized, high-power axial Zener platform delivering stable voltage references across extreme temperature ranges and surge conditions - targeting power conversion and ruggedized control systems.
FAQ
What is the Zener voltage tolerance of the 1N5344BE3/TR8?
The 1N5344BE3/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its nominal 8.2 V regulation voltage falls within 7.79 V to 8.61 V at 150 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance, but does not affect voltage tolerance.
Can the 1N5344BE3/TR8 be used in surface-mount designs?
No, the 1N5344BE3/TR8 is an axial-leaded T-18 package and is not compatible with surface-mount assembly. Microsemi offers surface-mount equivalents such as SMBJ5344B for SMC packages, but the 1N5344BE3/TR8 requires through-hole mounting with 3/8″ lead length for thermal derating compliance.
What is the maximum steady-state power dissipation for the 1N5344BE3/TR8 on a standard PCB?
When mounted on a standard FR4 PCB (1 oz Cu, 4 mm² copper pad, 1 mm track width, 25 mm length), the 1N5344BE3/TR8 has a steady-state power rating of 1.47 W at 25 °C ambient. This is derived from its 85 °C/W junction-to-ambient thermal resistance - significantly lower than its 5.0 W rating at lead temperature <25 °C.
Does the 1N5344BE3/TR8 require moisture preconditioning before reflow soldering?
No, the 1N5344BE3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not moisture-sensitive and requires no dry pack or baking prior to soldering. Its void-free epoxy encapsulation and Level 1 classification eliminate handling restrictions associated with humidity-sensitive devices.
How is polarity identified on the 1N5344BE3/TR8?
Polarity on the 1N5344BE3/TR8 is identified by a single color band on the cathode end of the axial body. The banded lead is the cathode and must be connected to the more positive potential in reverse-bias operation; the unbanded lead is the anode and connects to the lower-potential node or ground.
1N5344BE3/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:
- ±5%
- 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
1N5344BE3/TR8 FAQ
1.How can I place an order for 1N5344BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344BE3/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 1N5344BE3/TR8 reliable?
The price and inventory of 1N5344BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5344BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344BE3/TR8?
1N5344BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344BE3/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 1N5344BE3/TR8?
For technical support, including 1N5344BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344BE3/TR8 requirements.
6.How does Aetrix verify that 1N5344BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5344BE3/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 1N5344BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5344BE3/TR8?
All 1N5344BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344BE3/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 1N5344BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5344BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5344BE3/TR8 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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