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Microchip Technology 1N5342AE3/TR12
- Part No.:
- 1N5342AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342AE3/TR12.pdf
- Description:
- DIODE ZENER 6.8V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,541
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Product details
Overview
1N5342AE3/TR12 from Microsemi is a 5.1 V, ±10% 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 240 mA test current (IZT), exhibits 1.5 Ω dynamic impedance (ZZ), and maintains stable regulation across -65°C to +150°C operating temperature.
For engineers reviewing the 1N5342AE3/TR12 datasheet, 1N5342AE3/TR12 pinout, 1N5342AE3/TR12 application, or 1N5342AE3/TR12 equivalent, key selection criteria include its 5.1 V nominal Zener voltage, ±10% tolerance (A suffix), RoHS-compliant e3 plating, tape-and-reel TR12 packaging, and 1.5 Ω dynamic impedance at 240 mA - critical for low-noise reference stability and transient suppression.
Technical Context
This device operates as a two-terminal voltage reference with cathode-banded polarity, requiring reverse-bias connection where the banded end is positive relative to the anode. Its 25 °C/W junction-to-lead thermal resistance enables 5 W dissipation at TL < 25°C with 3/8" lead length, while FR4 board mounting reduces steady-state power to 1.47 W due to higher 85 °C/W junction-to-ambient resistance.
Electrical behavior is defined by JEDEC-standardized parameters: Zener voltage measured at 40 ±10 ms after DC current application; dynamic impedance derived from 1 kHz AC modulation (10% of IZT); and voltage regulation (ΔVZ) calculated as the difference between voltages at 10% and 50% of IZM - here 0.39 V for the 1N5342AE3/TR12.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±10% - defines regulated output voltage under specified test current; tolerance impacts reference accuracy in feedback networks. |
| Test Current (IZT) | 240 mA - current at which VZ is guaranteed; sets minimum operating point for stable regulation. |
| Dynamic Impedance (ZZ) | 1.5 Ω - low series resistance ensures minimal voltage shift under load variation; critical for ripple rejection. |
| Max Regulator Current (IZM) | 930 mA - maximum DC current before thermal runaway; determines safe continuous power handling at 5.1 V. |
| Reverse Current (IR) | 1.0 μA @ 3.9 V - leakage threshold below which device remains effectively off; defines turn-on sharpness. |
| Voltage Regulation (ΔVZ) | 0.39 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity across operating range. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W operation with minimal heatsinking when leads are trimmed to 10 mm. |
Pinout & Package
Package: Axial-leaded T-18 plastic case per JEDEC TO-204AA standard; void-free UL94V-0 epoxy body; matte-tin RoHS-compliant plating; cathode indicated by color band; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; reference ground node in reverse-bias regulation | Connected to system ground or lower-potential node; must sink full Zener current in shunt regulator topology. |
| Cathode (banded end) | Current exit terminal in forward bias; regulated voltage node in reverse-bias operation | Connected to voltage rail being stabilized; polarity reversal causes catastrophic failure. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Guaranteed compliance with industry-standard power, thermal, and reliability specs for axial-leaded Zeners. |
| ±10% voltage tolerance (A suffix) | Cost-optimized accuracy for non-critical regulation tasks where tighter tolerances are unnecessary. |
| RoHS-compliant e3 plating | Lead-free matte-tin termination compatible with modern reflow and wave soldering processes. |
| Tape-and-reel TR12 packaging | Standard EIA-296 format enabling automated pick-and-place assembly for high-volume production. |
| Moisture sensitivity Level 1 | No dry-pack required; eliminates baking step prior to assembly, reducing manufacturing overhead. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Shunt regulator in secondary-side feedback circuit of isolated DC-DC converter. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier trip point. Use Value: 5.1 V nominal Zener voltage matches common TL431 reference thresholds; ±10% tolerance accommodates loop gain margin without trimming. |
Use Scenario: Transient voltage clamp on 5 V logic rail exposed to ESD or inductive kickback. IC Role / Device Role / Timing Role: Passive crowbar protecting downstream CMOS inputs. Use Value: 930 mA max regulator current enables absorption of 4.7 A surge (8.3 ms half-sine) per datasheet IZSM rating. |
| Industrial Sensor Excitation Reference | Programmable Logic Controller (PLC) Input Conditioning |
Use Scenario: Stable excitation source for resistive bridge sensors in harsh ambient environments. IC Role / Device Role / Timing Role: Precision voltage source for Wheatstone bridge biasing. Use Value: -65°C to +150°C operating range ensures functionality in unheated enclosures; 0.39 V ΔVZ minimizes output drift across current load changes. |
Use Scenario: Level-shifting and noise filtering for 24 V DC digital inputs in factory automation systems. IC Role / Device Role / Timing Role: Input voltage limiter and ESD suppressor at field-wire interface. Use Value: Nonsensitive to ESD per MIL-STD-750 Method 1020; 1.2 V forward voltage drop allows reliable detection of active-low signals. |
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 5.1 V nominal voltage but ±5% tolerance (B suffix) and no e3/RoHS marking | Requires leaded solder process; tighter tolerance suits higher-accuracy references | Select when legacy Pb-based assembly or improved regulation accuracy justifies cost premium |
| MMBZ5231BS | Surface-mount SOD-123 package; 5.1 V ±5%; 225 mW power rating; different thermal profile | Not suitable for 5 W dissipation; intended for low-power signal-level clamping | Choose only for space-constrained PCBs where power demand is ≤225 mW |
Compared with 1N5342B and MMBZ5231BS, the 1N5342AE3/TR12 uniquely balances RoHS compliance, 5 W power handling, axial-leaded manufacturability, and cost-effective ±10% tolerance - making it optimal for industrial power supplies and ruggedized input conditioning where high surge immunity and board-level thermal management are required.
Availability
1N5342AE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor excitation systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5342AE3/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 1N53xx series was engineered for robust voltage regulation in mission-critical power systems, emphasizing wide temperature operation, high surge survivability, and JEDEC-standardized mechanical and electrical consistency.
FAQ
What is the Zener voltage tolerance of the 1N5342AE3/TR12?
The 1N5342AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its actual breakdown voltage falls within 4.59 V to 5.61 V at 240 mA test current and 25°C lead temperature. The tolerance directly affects regulation accuracy in feedback loops and must be accounted for during error budget analysis in power supply designs.
Can the 1N5342AE3/TR12 be used in surface-mount applications?
No - the 1N5342AE3/TR12 uses an axial-leaded T-18 package and is not designed for surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5342B series in DO-214AA package. Attempting to mount the 1N5342AE3/TR12 on SMT pads would violate mechanical and thermal specifications, risking solder joint failure and thermal runaway.
What is the maximum surge current rating for the 1N5342AE3/TR12?
The 1N5342AE3/TR12 has a maximum non-recurrent surge current (IZSM) of 14.4 A, specified for an 8.3 ms half-sine waveform. This rating enables reliable transient suppression in industrial control inputs and power supply input stages, provided the device is mounted with adequate copper area to dissipate energy without exceeding junction temperature limits.
How does the 1N5342AE3/TR12 differ from the 1N5342B variant?
The 1N5342AE3/TR12 differs from the 1N5342B in three key ways: it carries the "A" suffix (±10% vs. ±5% tolerance), includes "e3" RoHS-compliant plating (vs. tin-lead), and ships in tape-and-reel ("TR12") packaging (vs. bulk). These differences affect regulatory compliance, assembly process compatibility, and production line integration - not electrical performance at nominal conditions.
Is the 1N5342AE3/TR12 suitable for automotive applications?
The 1N5342AE3/TR12 meets AEC-Q200 stress test requirements only when subjected to additional screening (e.g., JAN, JANTX, or JANTXV levels via MQ/MX/MV prefixes). As supplied, it is qualified for industrial-grade operation (-65°C to +150°C) but lacks automotive-specific qualification documentation; use in automotive ECUs requires explicit manufacturer validation and screening add-ons.
1N5342AE3/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):
- 6.8 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/TR12 FAQ
1.How can I place an order for 1N5342AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342AE3/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 1N5342AE3/TR12 reliable?
The price and inventory of 1N5342AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5342AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342AE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342AE3/TR12?
1N5342AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342AE3/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 1N5342AE3/TR12?
For technical support, including 1N5342AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342AE3/TR12 requirements.
6.How does Aetrix verify that 1N5342AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5342AE3/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 1N5342AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5342AE3/TR12?
All 1N5342AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342AE3/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 1N5342AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5342AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342AE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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