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Microchip Technology 1N5342BE3/TR12
- Part No.:
- 1N5342BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342BE3/TR12.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
1N5342BE3/TR12 from Microsemi is a 5.1 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply reference and overvoltage protection circuits. It delivers stable regulation at 240 mA test current with 1.5 Ω dynamic impedance, operates from –65°C to +150°C, and features RoHS-compliant matte-tin plating per MIL-STD-750.
For engineers reviewing the 1N5342BE3/TR12 datasheet, 1N5342BE3/TR12 pinout, 1N5342BE3/TR12 application, or 1N5342BE3/TR12 equivalent, key selection criteria include its 5.1 V nominal Zener voltage, 5 W steady-state power rating at TL < 25°C, ±5% tolerance (B suffix), 1.5 Ω Zener impedance at IZT, and T-18 axial package compatibility with standard through-hole PCB layouts.
Technical Context
This device functions as a precision shunt voltage regulator, maintaining a stable 5.1 V reference across a wide operating current range (10%–50% of IZM = 93–465 mA) with minimal voltage drift (ΔVZ = 0.39 V). Its low thermal resistance (25 °C/W junction-to-lead) enables high-current operation when mounted with 3/8" lead length from body.
The 1N5342BE3/TR12 exhibits robust surge capability (14.4 A peak half-sine, 8.3 ms), low reverse leakage (<1.0 µA at VR = 3.0 V), and tight knee impedance (400 Ω at 1.0 mA), making it suitable for transient-suppressed reference designs where stability under varying load and temperature is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% - precise reference point for feedback loops and clamping thresholds |
| Test Current (IZT) | 240 mA - defined operating point for guaranteed VZ and ZZ specification compliance |
| Dynamic Impedance (ZZ) | 1.5 Ω - low AC resistance ensures minimal output voltage variation under dynamic load changes |
| Max Regulator Current (IZM) | 930 mA - maximum DC current before exceeding 5 W power limit at TL < 25°C |
| Surge Current (IZSM) | 14.4 A - peak non-repetitive current handling for transient overvoltage events |
| Voltage Regulation (ΔVZ) | 0.39 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W - enables high-power operation with simple lead-length heat sinking (3/8" from body) |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL; cathode indicated by band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during reverse breakdown | Connected to lower-potential node (e.g., ground or return path) in shunt regulator configuration |
| Cathode | Regulated voltage output terminal | Banded end; connected to input rail or node requiring clamped/stabilized voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions, electrical behavior, and interchangeability across qualified suppliers |
| Moisture sensitivity Level 1 | No dry pack required-simplifies handling, storage, and assembly without baking preconditioning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling protocols during board assembly and testing |
| High surge current rating (14.4 A) | Provides inherent transient immunity in unregulated input stages without external TVS augmentation |
| Low Zener impedance (1.5 Ω) | Minimizes output voltage ripple in precision reference applications such as ADC voltage references or op-amp biasing |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete pass-transistor circuits. IC Role / Device Role / Timing Role: Shunt reference element providing fixed 5.1 V reference for error amplifier comparison. Use Value: Maintains ±5% output accuracy across –65°C to +150°C and load currents up to 930 mA with ΔVZ ≤ 0.39 V. |
Use Scenario: Protecting downstream circuitry from input voltage surges exceeding 5.1 V. IC Role / Device Role / Timing Role: Clamping device diverting excess current to ground when input exceeds VZ. Use Value: Withstands 14.4 A surge (8.3 ms half-sine) while limiting clamped voltage to ≤5.49 V (VZ + ΔVZ). |
| Industrial Sensor Excitation | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in harsh environments. IC Role / Device Role / Timing Role: Precision voltage source for Wheatstone bridge biasing in analog front-ends. Use Value: Delivers 5.1 V ±5% with <1.0 µA leakage at 3.0 V reverse bias, minimizing sensor offset error. |
Use Scenario: Safeguarding digital input pins on PLC modules against field-wiring transients. IC Role / Device Role / Timing Role: Primary shunt protection element on 24 V DC input channels. Use Value: Activates at 5.1 V to clamp fast transients before they reach internal logic, leveraging 1.5 Ω ZZ for rapid response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5342B (non-e3) | Same electrical specs but SnPb lead finish; not RoHS compliant | Restricted to legacy industrial or military programs permitting Pb | Select only if RoHS exemption applies and SnPb solder process is used |
| SMBJ5342B | Surface-mount SMB package; identical VZ, tolerance, and power rating (5 W) | Requires SMT reflow assembly; unsuitable for through-hole or prototyping breadboards | Choose for space-constrained PCBs where automated assembly and smaller footprint are prioritized |
Compared with 1N5342BE3/TR12, the 1N5342B offers identical performance without RoHS compliance, while SMBJ5342B provides equivalent regulation in a surface-mount format-neither is pin-compatible due to differing packages, but both serve the same functional role in voltage reference and clamping circuits.
Availability
1N5342BE3/TR12 is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, and industrial sensor excitation requiring stable component supply and long-term obsolescence management.
Supply support for 1N5342BE3/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 engineered for ruggedized voltage regulation in mission-critical power systems, emphasizing wide temperature operation, surge resilience, and JEDEC-standardized mechanical reliability.
FAQ
What is the Zener voltage tolerance of the 1N5342BE3/TR12?
The 1N5342BE3/TR12 has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, indicated by the "B" suffix in the part number. This tolerance is verified at 240 mA test current and 25°C lead temperature, and remains stable across its full operating temperature range of –65°C to +150°C.
Can the 1N5342BE3/TR12 be used in surface-mount designs?
No-the 1N5342BE3/TR12 uses a T-18 axial-leaded package and is designed for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5342B in SMB package with identical electrical specifications, including 5.1 V ±5% Zener voltage and 5 W power rating.
What is the maximum continuous current the 1N5342BE3/TR12 can handle?
The 1N5342BE3/TR12 supports a maximum continuous Zener current (IZM) of 930 mA when operated at lead temperature < 25°C with 3/8" lead length from body. At ambient temperature on FR4 board, derated power limits IZM to approximately 175 mA (1.47 W / 5.1 V).
Does the 1N5342BE3/TR12 require moisture preconditioning before reflow?
No-the 1N5342BE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and requires no dry pack or baking prior to soldering. It withstands standard 260°C/10 s solder profiles without risk of popcorning.
How does the 1N5342BE3/TR12 perform under transient overvoltage conditions?
The 1N5342BE3/TR12 is rated for 14.4 A peak surge current (IZSM) in a non-repetitive 8.3 ms half-sine waveform. During such events, it clamps voltage to ≤5.49 V (5.1 V + ΔVZ), protecting downstream components without degradation when operated within specified thermal limits.
1N5342BE3/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:
- ±5%
- 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
1N5342BE3/TR12 FAQ
1.How can I place an order for 1N5342BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342BE3/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 1N5342BE3/TR12 reliable?
The price and inventory of 1N5342BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5342BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342BE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342BE3/TR12?
1N5342BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342BE3/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 1N5342BE3/TR12?
For technical support, including 1N5342BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342BE3/TR12 requirements.
6.How does Aetrix verify that 1N5342BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5342BE3/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 1N5342BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5342BE3/TR12?
All 1N5342BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342BE3/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 1N5342BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5342BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342BE3/TR12 Tags
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MMBZ5240B-7-F
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MM5Z5V1ST1G
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