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Microchip Technology 1N5342AE3/TR8
- Part No.:
- 1N5342AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342AE3/TR8.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,175
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Product details
Overview
1N5342AE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 6.8 V, ±10% tolerance (A suffix), 175 mA test current (IZT), 1.0 Ω maximum dynamic impedance (ZZ), and 700 mA maximum Zener current (IZM) at 25°C lead temperature. 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 1N5342AE3/TR8 datasheet, 1N5342AE3/TR8 pinout, 1N5342AE3/TR8 application, or 1N5342AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (11.5 A), reverse leakage (10 µA @ 5.2 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, with cathode indicated by a band and rated for stable DC regulation across 10–50% of IZM. Its low 25 °C/W junction-to-lead thermal resistance enables high-current operation when mounted with ≥10 mm lead length from body.
Electrical behavior is defined at TL = 25°C with 40 ms settling time; voltage regulation (ΔVZ = 0.15 V) is measured between 10% and 50% of IZM, and dynamic impedance (ZZ = 1.0 Ω) is derived from 1 kHz AC modulation at 10% of IZT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±10% - defines nominal regulation point under 175 mA DC bias; actual range is 6.12 V to 7.48 V. |
| Test Current (IZT) | 175 mA - DC current at which VZ is specified; sets operating point for stable regulation. |
| Dynamic Impedance (ZZ) | 1.0 Ω max - small-signal AC resistance; ensures minimal voltage shift under load transients. |
| Max Reverse Current (IR) | 10 µA @ 5.2 V - leakage threshold below regulation knee; confirms sharp breakdown onset. |
| Max Zener Current (IZM) | 700 mA - absolute DC current limit at TL = 25°C; requires heatsinking above derated ambient conditions. |
| Surge Current (IZSM) | 11.5 A - non-repetitive 8.3 ms half-sine peak; supports transient overvoltage clamping. |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity. |
Pinout & Package
Package: Axial-leaded T-18 molded epoxy case (JEDEC DO-204AL), void-free UL94V-0 thermosetting body, 0.7 g weight, cathode identified by color 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 | Reference/ground node in reverse-bias configuration | Connected to system ground or lower-potential rail; carries full Zener current during regulation. |
| Cathode | Regulated output node | Banded end; held at stable VZ above anode; must be biased positive relative to anode to conduct. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions, marking, and thermal performance across global supply chain. |
| Level 1 moisture sensitivity | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage logistics. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly. |
| High surge current capability | 11.5 A (8.3 ms half-sine) enables robust transient suppression without external crowbar circuits. |
| Stable regulation over temperature | Operates continuously from –65°C to +150°C with specified ΔVZ and ZZ - suitable for automotive under-hood use. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback 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: Maintains ±10% output accuracy across line/load/temperature with 0.15 V regulation spread and 1.0 Ω dynamic impedance. |
Use Scenario: Clamps transient spikes on 5–12 V DC rails caused by inductive switching or ESD events. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 7.48 V (VZ max). Use Value: Absorbs 11.5 A surge (8.3 ms) without failure, limiting voltage excursion to ≤7.6 V during clamping. |
| Industrial Sensor Excitation | Programmable Reference Voltage Source |
Use Scenario: Provides stable excitation voltage for resistive bridge sensors (e.g., strain gauges) in PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost references where ±10% tolerance is acceptable. Use Value: Delivers 6.8 V ±0.68 V over –40°C to +85°C with <10 µA leakage at 5.2 V, minimizing sensor offset error. |
Use Scenario: Sets threshold for comparator-based level detection in battery monitoring or power sequencing circuits. IC Role / Device Role / Timing Role: Programmable reference node defining trip point for undervoltage/overvoltage alarms. Use Value: Enables deterministic 6.8 V trigger with 0.15 V hysteresis margin (ΔVZ), reducing false triggering in noisy 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 nominal VZ but ±5% tolerance (B suffix); 1.0 Ω ZZ; 700 mA IZM; no e3 RoHS marking. | Higher voltage precision required; RoHS compliance not mandatory. | Select 1N5342B when tighter ±5% regulation is needed and legacy tin-lead finish is acceptable. |
| MMSZ5234B-TP | Surface-mount SOD-123 package; 6.8 V ±5%; 200 mW power; 5 mA IZT; 10 Ω ZZ; 20 mA IZM. | Low-power, space-constrained PCBs; no axial-lead mounting; unsuitable for >100 mA regulation. | Choose MMSZ5234B-TP only for board-level trimming or low-current biasing where 5 W dissipation is unnecessary. |
Compared with 1N5342AE3/TR8, the 1N5342B offers improved voltage tolerance at the cost of RoHS compliance, while MMSZ5234B-TP trades power handling and thermal robustness for miniaturization - neither is pin-compatible, and both require layout changes.
Availability
1N5342AE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with traceable RoHS-compliant sourcing.
Supply support for 1N5342AE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and long-term stability under continuous DC stress.
FAQ
What is the Zener voltage tolerance of the 1N5342AE3/TR8?
The 1N5342AE3/TR8 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix in its part number. This means its actual regulation voltage falls between 6.12 V and 7.48 V when measured at 175 mA DC test current and 25°C lead temperature. The tolerance is guaranteed per JEDEC specification and applies across the full operating temperature range of –65°C to +150°C.
Can the 1N5342AE3/TR8 be used in surface-mount designs?
No, the 1N5342AE3/TR8 is an axial-leaded T-18 (DO-204AL) package and is not compatible with surface-mount assembly processes. For SMT equivalents, Microsemi offers the SMBJ5342B or SMBG5342B series in SMB/SMBG packages. These share the same 6.8 V nominal Zener voltage but differ in thermal performance, surge rating, and mounting method - direct substitution requires PCB redesign.
What is the maximum power dissipation of the 1N5342AE3/TR8 at room temperature?
The 1N5342AE3/TR8 is rated for 5.0 W steady-state power dissipation at 25°C lead temperature (TL), provided leads are trimmed to 10 mm (3/8 inch) from the body. When mounted on a standard FR4 PCB with 1 oz copper, its derated power drops to 1.47 W at 25°C ambient due to higher junction-to-ambient thermal resistance (85 °C/W). Derating curves in the datasheet must be followed for elevated temperatures.
Does the 1N5342AE3/TR8 meet RoHS requirements?
Yes, the "e3" suffix in 1N5342AE3/TR8 explicitly denotes RoHS compliance. The device uses annealed matte-tin plating on leads and a void-free UL94V-0 epoxy body, meeting EU Directive 2011/65/EU. Lead content is below 1000 ppm, and all restricted substances (Cd, Pb, Hg, Cr⁶⁺, PBB, PBDE) are within allowable limits per certified test reports.
How is polarity marked on the 1N5342AE3/TR8?
The 1N5342AE3/TR8 uses a single color band near one end of the cylindrical body to indicate the cathode terminal. During operation, the banded end must be held at a more positive potential than the opposite (anode) end to achieve reverse-bias conduction and Zener regulation. Incorrect polarity results in forward conduction (~1.2 V drop) and loss of regulation function.
1N5342AE3/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:
- ±10%
- 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
1N5342AE3/TR8 FAQ
1.How can I place an order for 1N5342AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342AE3/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 1N5342AE3/TR8 reliable?
The price and inventory of 1N5342AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342AE3/TR8 is usually 5 days.
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1N5342AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342AE3/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 1N5342AE3/TR8?
For technical support, including 1N5342AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342AE3/TR8 requirements.
6.How does Aetrix verify that 1N5342AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5342AE3/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 1N5342AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5342AE3/TR8?
All 1N5342AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342AE3/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 1N5342AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5342AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342AE3/TR8 Tags
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