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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1N5340C/TR8

Name: 1N5340C/TR8
Brand: Microchip Technology
SKU: 1N5340C/TR8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5340C/TR8

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5340C/TR8.pdf

Description:: DIODE ZENER 6V 5W T18

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N5340C/TR8 from Microsemi is a 6.0 V, ±2% tolerance, 5 W axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers stable regulation at 200 mA test current with 1.0 Ω dynamic impedance and operates across –65°C to +150°C.

For engineers reviewing the 1N5340C/TR8 datasheet, 1N5340C/TR8 pinout, 1N5340C/TR8 application, or 1N5340C/TR8 equivalent, key selection criteria include its tight ±2% V_Z tolerance, low 1.0 Ω Z_Z at I_ZT, high 790 mA maximum Zener current (I_ZM), and compatibility with tape-and-reel automated assembly (TR8).

Technical Context

This discrete Zener diode functions as a two-terminal shunt regulator, maintaining a stable 6.0 V reverse breakdown voltage across a wide operating current range (1.0 mA to 790 mA). Its low dynamic impedance (1.0 Ω) and minimal voltage regulation drift (ΔV_Z = 0.19 V) ensure consistent performance under varying load and thermal conditions.

The device uses a void-free thermosetting epoxy T-18 package with tin-lead or RoHS-compliant matte-tin plating, rated for 25 °C/W junction-to-lead thermal resistance at 3/8″ lead length. It meets MIL-STD-750 ESD immunity and withstands 18.7 A non-recurrent surge current (8.3 ms half-sine).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.0 V ±2% - precise reference voltage for feedback and clamping circuits
Test Current (I_ZT)	200 mA - defines nominal operating point for V_Z and Z_Z specification
Dynamic Impedance (Z_Z)	1.0 Ω - low AC resistance ensures minimal output voltage variation with current changes
Max Zener Current (I_ZM)	790 mA - maximum continuous DC current at 25°C with adequate heat sinking
Power Dissipation (P_D)	5.0 W - steady-state power handling at TL < 25°C, derates linearly above that temperature
Surge Current (I_ZSM)	18.7 A - peak non-recurrent surge capability for transient overvoltage suppression
Voltage Regulation (ΔV_Z)	0.19 V - difference between V_Z measured at 10% and 50% of I_ZM, indicating regulation linearity

Pinout & Package

T-18 axial-leaded plastic package with cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Moisture sensitivity level: Level 1 (no dry pack required).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Reference ground node	Connected to circuit ground or lower-potential rail; enables forward bias operation below 1.2 V
Cathode (banded end)	Zener breakdown terminal / Regulated output node	Connected to regulated voltage node; reverse-biased to maintain 6.0 V reference during regulation

Key Features

Feature	Design Value
±2% Zener voltage tolerance (C suffix)	Enables tighter closed-loop control in power supply feedback without external trimming
Low 1.0 Ω dynamic impedance at 200 mA	Minimizes output voltage deviation under dynamic load transients
790 mA maximum Zener current (I_ZM)	Supports higher-power regulation without external series limiting resistors in many designs
RoHS-compliant e3 option available	Meets environmental compliance requirements for industrial and commercial end equipment
Nonsensitive to ESD per MIL-STD-750 Method 1020	Reduces handling precautions and eliminates need for special ESD controls in assembly

Applications

Switch-Mode Power Supply Feedback	Overvoltage Protection Clamp
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt reference providing precise 6.0 V threshold to drive optocoupler LED current. Use Value: ±2% V_Z tolerance directly improves output voltage accuracy to ±1.5% over temperature and line.	Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 6.0 V. Use Value: 18.7 A surge rating handles common 8.3 ms surges (e.g., IEC 61000-4-5 Level 3) without degradation.
Programmable Voltage Reference	Linear Regulator Bias Network
Use Scenario: Combined with resistive dividers to generate adjustable reference voltages for ADCs or comparators. IC Role / Device Role / Timing Role: Stable 6.0 V anchor point enabling accurate scaling of higher or lower reference levels. Use Value: Low ΔV_Z (0.19 V) and 1.0 Ω Z_Z ensure reference stability across 1–500 mA operating range.	Use Scenario: Supplies bias current to the pass transistor base in discrete linear regulators. IC Role / Device Role / Timing Role: Provides fixed 6.0 V base drive voltage to set output voltage via emitter resistor ratio. Use Value: High I_ZM (790 mA) supports robust bias delivery even under heavy load conditions.

Switch-Mode Power Supply Feedback

Overvoltage Protection Clamp

Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage.

IC Role / Device Role / Timing Role: Shunt reference providing precise 6.0 V threshold to drive optocoupler LED current.

Use Value: ±2% V_Z tolerance directly improves output voltage accuracy to ±1.5% over temperature and line.

Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages.

IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 6.0 V.

Use Value: 18.7 A surge rating handles common 8.3 ms surges (e.g., IEC 61000-4-5 Level 3) without degradation.

Programmable Voltage Reference

Linear Regulator Bias Network

Use Scenario: Combined with resistive dividers to generate adjustable reference voltages for ADCs or comparators.

IC Role / Device Role / Timing Role: Stable 6.0 V anchor point enabling accurate scaling of higher or lower reference levels.

Use Value: Low ΔV_Z (0.19 V) and 1.0 Ω Z_Z ensure reference stability across 1–500 mA operating range.

Use Scenario: Supplies bias current to the pass transistor base in discrete linear regulators.

IC Role / Device Role / Timing Role: Provides fixed 6.0 V base drive voltage to set output voltage via emitter resistor ratio.

Use Value: High I_ZM (790 mA) supports robust bias delivery even under heavy load conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5340B/TR8	±5% V_Z tolerance (vs. ±2% for 1N5340C/TR8); otherwise identical electrical specs and package	Acceptable where system-level voltage accuracy allows ±5% reference error	Select when cost sensitivity outweighs need for tight regulation; same footprint and assembly process
MMBZ5234B-7-F	Surface-mount SOD-123 package; 6.0 V ±5%, 225 mW P_D; not pin-compatible	Limited to low-power, space-constrained PCBs; unsuitable for 5 W dissipation or high-surge environments	Choose only for compact consumer designs with <100 mA regulation current and no surge exposure

Compared with 1N5340B/TR8, the 1N5340C/TR8 provides twice the voltage accuracy at identical cost and form factor; versus MMBZ5234B-7-F, it delivers >22× higher power handling and surge resilience but requires axial through-hole mounting.

Availability

1N5340C/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 1N5340C/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/C series was designed for ruggedized, high-stability voltage regulation in harsh-environment power systems-emphasizing wide temperature operation, surge resilience, and JEDEC-standardized axial packaging.

FAQ

What is the Zener voltage tolerance of the 1N5340C/TR8?

The 1N5340C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This means its nominal 6.0 V breakdown voltage is guaranteed between 5.88 V and 6.12 V at 200 mA test current and 25°C lead temperature. This tight tolerance supports high-accuracy regulation in feedback and reference applications where ±5% devices like the 1N5340B/TR8 would introduce excessive error.

What is the maximum continuous Zener current for the 1N5340C/TR8?

The 1N5340C/TR8 supports a maximum continuous Zener current (I_ZM) of 790 mA when adequately heat sunk at 25°C lead temperature. This value is derived from its 5.0 W power rating and the upper limit of its ±2% V_Z tolerance (6.12 V). At ambient mounting on FR4, derating applies-its usable I_ZM drops to approximately 170 mA due to higher thermal resistance (85°C/W).

Does the 1N5340C/TR8 have RoHS-compliant packaging?

Yes-the 1N5340C/TR8 is available in RoHS-compliant configuration, designated by the "e3" suffix in official Microsemi documentation. Its terminals feature annealed matte-tin plating compliant with RoHS Directive 2011/65/EU, and its void-free thermosetting epoxy body meets UL94V-0 flammability rating. The TR8 tape-and-reel packaging format is fully compatible with this RoHS version.

What is the surge current rating of the 1N5340C/TR8?

The 1N5340C/TR8 is rated for a peak non-recurrent surge current (I_ZSM) of 18.7 A, defined as the maximum amplitude of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient overvoltage events such as lightning-induced surges or inductive switching spikes without failure-making it suitable for primary-side clamping in industrial power interfaces where the 1N5340C/TR8 serves as a robust front-end protector.

How does the dynamic impedance of the 1N5340C/TR8 affect regulation performance?

The 1N5340C/TR8 exhibits a dynamic impedance (Z_Z) of 1.0 Ω at its 200 mA test current, meaning a 100 mA change in Zener current produces only ~0.1 V change in regulated voltage. This low Z_Z ensures minimal output variation under load transients-critical in feedback loops where the 1N5340C/TR8 stabilizes voltage references. Higher-impedance Zeners would degrade regulation linearity and increase ripple susceptibility.

1N5340C/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):: 6 V

Tolerance:: ±2%

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

1N5340C/TR8 FAQ

1.How can I place an order for 1N5340C/TR8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5340C/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 1N5340C/TR8 reliable?

The price and inventory of 1N5340C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340C/TR8 is usually 5 days.

3.What payment methods are accepted for 1N5340C/TR8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340C/TR8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5340C/TR8?

1N5340C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5340C/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 1N5340C/TR8?

For technical support, including 1N5340C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340C/TR8 requirements.

6.How does Aetrix verify that 1N5340C/TR8 is sourced from the original manufacturer or authorized distributors?

All 1N5340C/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 1N5340C/TR8 meets industry standards.

7.What is the process for return or replacement of 1N5340C/TR8?

All 1N5340C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340C/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 1N5340C/TR8 part is unused and in its original packaging.

Return procedure for 1N5340C/TR8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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