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Microchip Technology 1N5342BE3/TR8
- Part No.:
- 1N5342BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342BE3/TR8.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,961
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Product details
Overview
1N5342BE3/TR8 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 6.8 V, ±5% tolerance (B suffix), 175 mA test current (IZT), 1.0 Ω maximum dynamic impedance (ZZ), and 700 mA maximum Zener current (IZM) when adequately heat-sunk. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5342BE3/TR8 datasheet, 1N5342BE3/TR8 pinout, 1N5342BE3/TR8 application, or 1N5342BE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (11.5 A), voltage regulation (ΔVZ = 0.15 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current (10–50% IZM) and temperature ranges. Its low dynamic impedance (1.0 Ω) and tight ±5% tolerance ensure minimal voltage drift under load variation.
The device uses void-free thermosetting epoxy encapsulation (UL94V-0), cathode-indicating band polarity, and is rated for 260 °C soldering (10 s). Thermal performance is defined at 3/8″ (10 mm) lead length from body (25 °C/W) or on FR4 PCB (85 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% - precise regulation point for feedback sensing in 7–12 V DC-DC converters |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified; defines minimum stable bias current |
| Dynamic Impedance (ZZ) | 1.0 Ω max - ensures <10 mV output shift per 10 mA load change near IZT |
| Max Zener Current (IZM) | 700 mA - peak continuous reverse current achievable with proper heat sinking at TL ≤ 25 °C |
| Power Dissipation | 5.0 W at TL = 25 °C - derates linearly above 25 °C (20 mW/°C) per Figure 1 |
| Surge Current (IZSM) | 11.5 A - withstands non-repetitive 8.3 ms half-sine transients (e.g., input line surges) |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy, 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 / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse voltage applied across anode-to-cathode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connects to regulated rail or error amplifier input; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables tighter feedback loop control vs. ±10% (A) or ±20% (no suffix) parts in voltage reference designs |
| 25 °C/W junction-to-lead thermal resistance | Allows 5 W operation with simple lead-length heat sinking-no heatsink required for moderate duty cycles |
| Moisture sensitivity Level 1 (IPC/JEDEC J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints-ready for immediate SMT/reflow or hand-solder |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during assembly |
| RoHS-compliant matte-tin plating (e3 suffix) | Ensures compatibility with lead-free reflow profiles and meets global environmental compliance mandates |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Provides stable 6.8 V reference to TL431 shunt regulator or directly biases optocoupler LED. Use Value: Low ΔVZ (0.15 V) and 1.0 Ω ZZ minimize output voltage drift across line/load/temperature, improving overall regulation to ±1.5%. | Use Scenario: Clamps transient overvoltages on 5–12 V rails caused by inductive switching or ESD events. IC Role / Device Role / Timing Role: Acts as two-terminal crowbar element; conducts heavily above 6.8 V to divert surge current away from sensitive ICs. Use Value: 11.5 A surge rating (8.3 ms) and low knee impedance protect downstream logic without requiring active drivers or timing circuits. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Sets precise bias points in analog front-ends for ADCs, DACs, or instrumentation amplifiers. IC Role / Device Role / Timing Role: Delivers stable 6.8 V excitation to bridge sensors or reference inputs of precision op-amps. Use Value: ±5% tolerance and <0.15 V regulation error enable 12-bit system accuracy without trimming or calibration. | Use Scenario: Supplies regulated excitation voltage to RTDs, strain gauges, or pressure transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Functions as low-noise, low-drift voltage source replacing higher-cost IC references in cost-sensitive industrial nodes. Use Value: 175 mA IZT supports up to 100 mA load current with <0.5% output deviation, meeting IEC 61000-4-5 surge immunity requirements. |
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, non-TR8) | Same electrical specs but SnPb plating and bulk packaging; lacks RoHS compliance and tape-and-reel convenience | Not suitable for lead-free manufacturing or automated pick-and-place; requires manual loading | Select only for legacy SnPb assembly or non-RoHS exempt programs |
| MMSZ5234B-TP (Micro Commercial Co.) | Surface-mount SOD-123 package; same 6.8 V/±5%/500 mW rating; higher ZZ (7 Ω) and lower IZM (160 mA) | Used in space-constrained PCBs; unsuitable for high-power dissipation or surge-heavy environments | Choose for compact layouts where thermal mass and surge robustness are secondary to size |
Compared with 1N5342BE3/TR8, the 1N5342B lacks RoHS compliance and reel packaging, limiting modern production use; MMSZ5234B-TP offers footprint savings but sacrifices 3.5× lower power rating and 4.4× higher dynamic impedance-critical for precision regulation.
Availability
1N5342BE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and industrial sensor excitation requiring stable component supply and full traceability.
Supply support for 1N5342BE3/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 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and long-term stability over extended temperature ranges.
FAQ
What is the Zener voltage tolerance of the 1N5342BE3/TR8?
The 1N5342BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 6.8 V regulation voltage falls within 6.46 V to 7.14 V at 25 °C when tested at 175 mA. The tolerance remains stable across its operating temperature range of –65 °C to +150 °C, making the 1N5342BE3/TR8 suitable for applications demanding consistent reference accuracy without calibration.
Can the 1N5342BE3/TR8 be used in surface-mount designs?
No, the 1N5342BE3/TR8 is an axial-leaded T-18 (DO-204AL) package and is not compatible with surface-mount assembly. It requires through-hole mounting with 3/8″ (10 mm) lead length from the body for optimal thermal performance. For SMT equivalents, consider the SMBJ5342B or SMBG5342B series-same electrical specs but in SMB/DO-214AA packages-though these require layout adaptation and have different thermal derating curves.
What is the maximum surge current rating for the 1N5342BE3/TR8?
The 1N5342BE3/TR8 has a maximum non-repetitive surge current (IZSM) rating of 11.5 A for an 8.3 ms half-sine waveform, as specified in the Microsemi datasheet. This rating enables the 1N5342BE3/TR8 to absorb transient energy from inductive kickback or lightning-induced surges without failure, provided the average power dissipation remains within 5 W limits and adequate PCB copper area is used for thermal relief.
How does the thermal resistance of the 1N5342BE3/TR8 affect its power handling?
The 1N5342BE3/TR8 has a junction-to-lead thermal resistance of 25 °C/W when mounted with 3/8″ leads, allowing full 5 W dissipation at lead temperature ≤25 °C. On FR4 PCBs with standard 1 oz copper, its junction-to-ambient resistance rises to 85 °C/W, limiting steady-state power to ~1.47 W at 25 °C ambient. Thus, the 1N5342BE3/TR8's usable power depends critically on mechanical mounting-engineers must select between lead-length heat sinking or PCB copper area based on thermal budget.
Is the 1N5342BE3/TR8 RoHS compliant and lead-free solder compatible?
Yes, the "e3" suffix confirms the 1N5342BE3/TR8 is RoHS compliant with annealed matte-tin plating, fully compatible with lead-free reflow profiles up to 260 °C for 10 seconds. Its UL94V-0 epoxy body and moisture sensitivity Level 1 classification eliminate dry-pack requirements, enabling direct use in high-volume automated assembly without preconditioning-making the 1N5342BE3/TR8 suitable for global commercial and industrial manufacturing.
1N5342BE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5342BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342BE3/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 1N5342BE3/TR8 reliable?
The price and inventory of 1N5342BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5342BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342BE3/TR8?
1N5342BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342BE3/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 1N5342BE3/TR8?
For technical support, including 1N5342BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342BE3/TR8 requirements.
6.How does Aetrix verify that 1N5342BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5342BE3/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 1N5342BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5342BE3/TR8?
All 1N5342BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342BE3/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 1N5342BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5342BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342BE3/TR8 Tags
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