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Microchip Technology 1N5342E3/TR8
- Part No.:
- 1N5342E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342E3/TR8.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,288
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Product details
Overview
1N5342E3/TR8 from Microsemi is a 6.8 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications. It delivers 175 mA maximum Zener current (IZM), exhibits 1.0 Ω dynamic impedance (ZZ) at 175 mA test current, and operates across –65°C to +150°C.
For engineers reviewing the 1N5342E3/TR8 datasheet, 1N5342E3/TR8 pinout, 1N5342E3/TR8 application, or 1N5342E3/TR8 equivalent, key selection criteria include its 6.8 V nominal Zener voltage, 5 W steady-state power rating at TL < 25°C with 3/8" lead length, low 1.0 Ω dynamic impedance, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown. Its regulation performance is defined by Zener voltage (VZ = 6.8 V), dynamic impedance (ZZ = 1.0 Ω at IZT = 175 mA), and voltage regulation (ΔVZ = 0.15 V between 10% and 50% of IZM).
Thermal design relies on junction-to-lead thermal resistance of 25 °C/W (at 3/8" lead length) and junction-to-ambient resistance of 85 °C/W on FR4 board (1 oz Cu, 4 mm² pads). It maintains stable regulation across –65°C to +150°C and withstands 11.5 A non-recurrent surge current (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% - precise reference point for feedback control in linear regulators and SMPS. |
| Power Dissipation (Pd) | 5.0 W at TL < 25°C - requires minimum 3/8" lead length from body for full rating. |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified; defines stable regulation zone. |
| Dynamic Impedance (ZZ) | 1.0 Ω - low AC resistance ensures minimal output voltage variation under load transients. |
| Max Reverse Current (IR) | 10 μA at VR = 5.2 V - confirms sharp knee and low leakage below regulation threshold. |
| Surge Current (IZSM) | 11.5 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
| Operating Temperature | –65°C to +150°C - suitable for industrial, automotive under-hood, and aerospace environments. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), cathode indicated by band. Leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to circuit ground or lower-potential node; forms reference return path. |
| Cathode | Zener voltage output terminal | Banded end; connected to regulated node; supplies stable 6.8 V when reverse-biased above knee. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Industry-standard 1N53xxB series compliance ensures interoperability and sourcing continuity. |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling, storage, and assembly logistics. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD controls during assembly. |
| Tape-and-reel packaging | TR8 suffix denotes EIA-296 standard reel - enables automated SMT placement despite axial form factor. |
| High surge current capability | 11.5 A peak (8.3 ms) - provides robust transient suppression in unregulated input stages. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Primary-side voltage reference establishing precise 6.8 V threshold for error amplifier comparison. Use Value: Enables ±1% output regulation accuracy with minimal external components due to tight 6.8 V ±5% tolerance and low 1.0 Ω dynamic impedance. |
Use Scenario: Clamping transient spikes on DC bus lines in motor drives or battery management systems. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 6.8 V. Use Value: Absorbs 11.5 A surge (8.3 ms) without degradation, protecting downstream MOSFETs and controllers from overvoltage damage. |
| Precision Reference for Analog Circuits | Industrial Sensor Excitation |
Use Scenario: Providing stable bias voltage for op-amp comparators, ADC references, or current sources in instrumentation. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source replacing more complex IC references where cost and simplicity are critical. Use Value: Delivers 6.8 V with only 0.15 V regulation shift (ΔVZ) from 10% to 50% of IZM, ensuring consistent analog performance across load variations. |
Use Scenario: Supplying excitation voltage to resistive temperature detectors (RTDs) or strain gauges in process control transmitters. IC Role / Device Role / Timing Role: Stable, low-impedance reference node maintaining constant sensor bias independent of supply fluctuations. Use Value: Maintains operation from –65°C to +150°C and exhibits minimal voltage drift versus temperature, supporting high-accuracy measurements in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5342B | Same 6.8 V ±5% VZ and 5 W rating, but lead finish is tin-lead (non-RoHS); no e3 suffix. | Not suitable for RoHS-compliant production; requires exemption documentation. | Select 1N5342B only for legacy repair or non-RoHS programs where tin-lead solder compatibility is required. |
| MMSZ5234B-TP | Surface-mount SOD-123 package; 6.8 V ±5%, 500 mW rating - 1/10 the power of 1N5342E3/TR8. | Limited to low-power signal-level regulation; cannot replace 1N5342E3/TR8 in 5 W applications. | Choose MMSZ5234B-TP only for space-constrained PCBs where thermal dissipation is handled externally or power demand is ≤0.5 W. |
Compared with 1N5342B and MMSZ5234B-TP, the 1N5342E3/TR8 uniquely combines RoHS compliance, 5 W axial-leaded power handling, JEDEC-standard T-18 packaging, and tape-and-reel automation support - making it the only direct fit for high-reliability, medium-power, automated manufacturing environments requiring full regulatory alignment.
Availability
1N5342E3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision analog reference designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant procurement.
Supply support for 1N5342E3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for robust, high-power voltage regulation in mission-critical power systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5342E3/TR8?
The 1N5342E3/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its registered family designation (1N5342B). This means its measured VZ at 175 mA test current falls within 6.46 V to 7.14 V at 25°C. The e3 suffix confirms RoHS compliance but does not affect tolerance specification. This tolerance is verified per JEDEC standards and applies across the full operating temperature range.
Can the 1N5342E3/TR8 be used in surface-mount assembly processes?
Yes - the TR8 suffix indicates EIA-296 standard tape-and-reel packaging, enabling compatibility with automated pick-and-place equipment. Although the 1N5342E3/TR8 is an axial-leaded device, its reel format allows integration into mixed-technology SMT lines. Placement requires axial orientation tooling, and post-placement reflow must follow Microsemi's recommended profile: peak temperature ≤260°C for ≤10 seconds, per MIL-STD-750 Method 2026.
What is the maximum continuous Zener current for the 1N5342E3/TR8?
The 1N5342E3/TR8 supports a maximum continuous Zener current (IZM) of 700 mA when adequately heat sunk - calculated as Pd/VZM = 5.0 W / 7.14 V (upper limit of ±5% tolerance). At ambient conditions with FR4 mounting (1 oz Cu, 4 mm² pads), derated IZM is 175 mA due to 85 °C/W thermal resistance. Full 5 W operation requires TL < 25°C with 3/8" lead length from body.
How does the 1N5342E3/TR8 perform under surge conditions?
The 1N5342E3/TR8 is rated for 11.5 A peak non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform - validated per JEDEC test method. This enables reliable clamping of line transients in industrial power inputs. Its 25 °C/W junction-to-lead thermal resistance prevents thermal runaway during surges, and its moisture sensitivity level 1 eliminates preconditioning requirements before surge exposure.
Is the 1N5342E3/TR8 suitable for automotive under-hood applications?
Yes - the 1N5342E3/TR8 is qualified for operation from –65°C to +150°C and features UL94V-0 epoxy encapsulation, making it suitable for under-hood engine control units and battery management systems. Its nonsensitivity to ESD (per MIL-STD-750 Method 1020) and robust surge rating (11.5 A) address automotive EMC and load-dump requirements. No additional screening is needed beyond standard qualification.
1N5342E3/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):
- 6.8 V
- Tolerance:
- ±20%
- 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
1N5342E3/TR8 FAQ
1.How can I place an order for 1N5342E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342E3/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 1N5342E3/TR8 reliable?
The price and inventory of 1N5342E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5342E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342E3/TR8?
1N5342E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342E3/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 1N5342E3/TR8?
For technical support, including 1N5342E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342E3/TR8 requirements.
6.How does Aetrix verify that 1N5342E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5342E3/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 1N5342E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5342E3/TR8?
All 1N5342E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342E3/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 1N5342E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5342E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342E3/TR8 Tags
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