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Microchip Technology 1N5340E3/TR12
- Part No.:
- 1N5340E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340E3/TR12.pdf
- Description:
- DIODE ZENER 6V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,386
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Product details
Overview
1N5340E3/TR12 from Microsemi is a 6.0 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers 200 mA maximum Zener current (IZM) at 25°C with 1.0 Ω dynamic impedance (ZZ) and operates across –65°C to +150°C.
For engineers reviewing the 1N5340E3/TR12 datasheet, 1N5340E3/TR12 pinout, 1N5340E3/TR12 application, or 1N5340E3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (12.7 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown. Its regulation performance is defined by measured ΔVZ ≤ 0.19 V (difference between voltage at 10% and 50% of IZM) and low knee impedance (ZZK = 500 Ω @ 1.0 mA), enabling stable operation even at low bias currents.
The 1N5340E3/TR12 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 260 °C soldering (10 s), and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V ±5% - precise regulation setpoint for feedback or clamping at nominal current |
| Test Current (IZT) | 200 mA - standardized bias point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 1.0 Ω - low AC resistance ensures minimal voltage shift under load transients |
| Max Regulator Current (IZM) | 790 mA - maximum continuous DC current when adequately heat-sunk at TL = 25°C |
| Surge Current (IZSM) | 12.7 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.19 V - tight variation between 10% and 50% of IZM confirms stable regulation |
| Thermal Resistance | 25 °C/W junction-to-lead - enables high-power operation with simple lead-length heat sinking |
Pinout & Package
Package: T-18 axial-leaded plastic case (JEDEC TO-204-AD), void-free UL94V-0 epoxy body, 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 | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower potential; forward voltage ≤ 1.2 V @ 1.0 A |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; operated positive relative to anode to maintain reverse-bias regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures industry-standard mechanical and electrical interchangeability across manufacturers |
| ±5% voltage tolerance (B suffix) | Reduces need for post-production trimming in mid-precision voltage references |
| Level 1 moisture sensitivity | Eliminates baking requirements before PCB assembly, lowering manufacturing cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special static control in standard production environments |
| High surge current rating | Withstands 12.7 A transient surges without degradation-suitable for input-stage clamping |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler-coupled feedback loop of isolated DC-DC converter to regulate 12 V output. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces TL431 in cost-sensitive designs. Use Value: 6.0 V nominal VZ provides stable reference despite ±5% tolerance and 0.19 V ΔVZ across 79–395 mA operating range. | Use Scenario: Placed across DC bus of motor drive to clamp transients exceeding 6.5 V. IC Role / Device Role / Timing Role: Two-terminal shunt protector absorbing energy during MOSFET turn-off spikes. Use Value: 12.7 A surge rating and 5 W steady-state dissipation enable reliable clamping without external series resistor. |
| Industrial Sensor Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Biasing bridge sensor output in 4–20 mA transmitter with ratiometric ADC. IC Role / Device Role / Timing Role: Precision voltage reference for excitation and signal scaling; mounted directly on sensor board. Use Value: Stable 6.0 V reference over –40°C to +85°C ambient due to low ΔVZ and 25 °C/W thermal resistance. | Use Scenario: Level-shifting and clamping 24 V digital inputs to protect FPGA I/O pins. IC Role / Device Role / Timing Role: Input stage clamp limiting voltage to 6.0 V while sinking fault current. Use Value: Matte-tin leads ensure reliable solder joint integrity after multiple reflow cycles in industrial PCB assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5340B | Same VZ, IZT, ZZ, and package; differs only in RoHS compliance (e3 vs. B suffix) | No functional difference; 1N5340B lacks RoHS designation and uses tin-lead plating | Select 1N5340E3/TR12 for new designs requiring RoHS compliance and lead-free assembly |
| MMBZ5234B-TP | Surface-mount SOT-23 package; same 6.0 V ±5%, but lower Pd = 350 mW and higher ZZ = 17 Ω | Not suitable for 5 W power dissipation; limited to low-current bias/reference roles | Choose MMBZ5234B-TP only for space-constrained PCBs where power < 0.35 W is sufficient |
Compared with 1N5340B and MMBZ5234B-TP, the 1N5340E3/TR12 uniquely combines full 5 W power handling, axial-leaded through-hole mounting, and RoHS compliance-making it optimal for industrial power supplies requiring robust thermal management and regulatory alignment.
Availability
1N5340E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5340E3/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 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, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance for 1N5340E3/TR12?
The 1N5340E3/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its base part number (1N5340B). This tolerance applies at 25°C lead temperature with test current IZT = 200 mA. The e3 suffix denotes RoHS compliance but does not affect voltage specification.
Can 1N5340E3/TR12 be used in surface-mount designs?
No-1N5340E3/TR12 uses a T-18 axial-leaded package and requires through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5340B (DO-214AA) and SMBG5340B (DO-214AB), both rated for 5 W and sharing identical electrical specs.
What is the maximum steady-state power dissipation for 1N5340E3/TR12 at 25°C?
The 1N5340E3/TR12 is rated for 5.0 W steady-state power dissipation at TL = 25°C with 3/8 inch (10 mm) lead length from body. When mounted on FR4 with specified copper pads, derated power drops to 1.47 W at TA = 25°C due to higher junction-to-ambient thermal resistance (85 °C/W).
Does 1N5340E3/TR12 require dry packing before reflow soldering?
No. The 1N5340E3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored and processed without dry pack or baking-even after exposure to ambient humidity-due to its hermetic-grade epoxy encapsulation.
How is polarity marked on 1N5340E3/TR12?
Polarity is marked by a visible cathode band near one end of the T-18 package. During operation, the banded (cathode) end must be held at a higher potential than the anode end to achieve Zener breakdown and regulation. Forward voltage is ≤1.2 V at 1.0 A.
1N5340E3/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 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 3 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
1N5340E3/TR12 FAQ
1.How can I place an order for 1N5340E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340E3/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 1N5340E3/TR12 reliable?
The price and inventory of 1N5340E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5340E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5340E3/TR12?
1N5340E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340E3/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 1N5340E3/TR12?
For technical support, including 1N5340E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340E3/TR12 requirements.
6.How does Aetrix verify that 1N5340E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5340E3/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 1N5340E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5340E3/TR12?
All 1N5340E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340E3/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 1N5340E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5340E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5340E3/TR12 Tags
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MM5Z5V1ST1G
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