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Microchip Technology 1N5340AE3/TR8
- Part No.:
- 1N5340AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340AE3/TR8.pdf
- Description:
- DIODE ZENER 6V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
1N5340AE3/TR8 from Microsemi is a 6.0 V, ±10% tolerance, 5 W axial-leaded silicon Zener diode optimized for 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 1N5340AE3/TR8 datasheet, 1N5340AE3/TR8 pinout, 1N5340AE3/TR8 application, or 1N5340AE3/TR8 equivalent, key selection criteria include its 6.0 V nominal Zener voltage, ±10% tolerance (A suffix), 5 W steady-state power rating at lead temperature <25°C, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown. Its regulation performance is defined by specified Zener voltage (VZ = 6.0 V), dynamic impedance (ZZ ≤ 1.0 Ω at IZT = 200 mA), and voltage regulation (ΔVZ = 0.19 V between 10% and 50% of IZM).
It features a T-18 axial package with cathode band polarity marking, moisture sensitivity level 1 (no dry pack required), and thermal resistance of 25°C/W junction-to-lead at 10 mm lead length. Forward voltage is ≤1.2 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V ±10% - precise reference point for feedback and clamping at nominal operating current |
| Test Current (IZT) | 200 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | ≤1.0 Ω - low AC resistance ensures minimal voltage shift under varying load currents |
| Max Regulator Current (IZM) | 790 mA - maximum DC current before exceeding 5 W power limit at TL < 25°C |
| Power Dissipation | 5.0 W at TL < 25°C - defines thermal design margin for heatsinking requirements |
| Operating Temperature | –65°C to +150°C - supports industrial and automotive under-hood environments |
| Reverse Leakage (IR) | ≤1.0 μA at VR = 3.0 V - ensures low standby power loss in high-impedance bias networks |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; supplies stable 6.0 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating and halogen-free epoxy |
| Tight thermal resistance (25°C/W) | Enables reliable 5 W operation with minimal heatsinking at 10 mm lead length |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special handling during assembly or field service |
| Moisture sensitivity Level 1 | Allows indefinite storage without dry packing or baking prior to reflow |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold. Use Value: 6.0 V ±10% tolerance and 1.0 Ω dynamic impedance maintain ±1.5% output regulation across line/load transients. | Use Scenario: Placed across motor driver outputs to suppress inductive kickback spikes. IC Role / Device Role / Timing Role: Transient voltage suppression element limiting peak reverse voltage to 6.0 V. Use Value: Withstands 14.4 A surge current (8.3 ms half-sine) and exhibits only 0.19 V regulation shift from 79 mA to 395 mA. |
| Fixed Reference Voltage Generator | Linear Regulator Shunt Reference |
Use Scenario: Provides stable 6.0 V reference for analog sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Precision shunt reference source for ADC biasing and op-amp offset trimming. Use Value: Low 1.0 μA leakage at 3.0 V and 0.19 V ΔVZ ensure sub-0.3% drift over 10:1 current range. | Use Scenario: Shunt-connected across LDO output to improve load regulation and transient response. IC Role / Device Role / Timing Role: Dynamic load compensation element reducing output impedance at high frequencies. Use Value: 1.0 Ω ZZ at 200 mA lowers effective output impedance by >90% versus LDO alone at 100 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5340B | Same 6.0 V nominal VZ, but ±5% tolerance (B suffix) vs. ±10% (A suffix) | Higher precision required in feedback loops where tighter output tolerance is critical | Select 1N5340B when system-level output regulation demands <±1% accuracy |
| MMBZ5234B | Surface-mount SOT-23 package; 6.0 V ±5%; 0.35 W power rating | Used in space-constrained PCBs where axial leads are impractical | Select MMBZ5234B only for low-power (<350 mW), high-density layouts; not a drop-in replacement |
Compared with 1N5340B and MMBZ5234B, the 1N5340AE3/TR8 provides the highest power handling (5 W) and lowest dynamic impedance (1.0 Ω) in an axial through-hole package, making it optimal for industrial power conversion where thermal robustness and regulation stability are prioritized over footprint size.
Availability
1N5340AE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and fixed reference voltage generators requiring stable component supply and long-term obsolescence management.
Supply support for 1N5340AE3/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 specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge survivability, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5340AE3/TR8?
The 1N5340AE3/TR8 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its measured VZ falls between 5.4 V and 6.6 V at 200 mA test current and 25°C. The "e3" denotes RoHS compliance, and "TR8" specifies tape-and-reel packaging per EIA-296. This tolerance is confirmed in the Microsemi datasheet revision D, Table "ELECTRICAL CHARACTERISTICS".
Can the 1N5340AE3/TR8 be used in surface-mount designs?
No - the 1N5340AE3/TR8 uses a T-18 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5340B (DO-214AA) and MMBZ5234B (SOT-23), but neither matches the 5 W power rating or identical electrical specs of the 1N5340AE3/TR8. Direct substitution requires board redesign and thermal validation.
What is the maximum surge current rating for the 1N5340AE3/TR8?
The 1N5340AE3/TR8 has a maximum non-recurrent surge current (IZSM) of 14.4 A, specified as the peak of an 8.3 ms half-sine waveform. This value is derived from its 5 W power rating and 6.0 V Zener voltage, and is validated per Microsemi's test methodology in Note 5 of the datasheet. It enables reliable clamping of inductive transients in motor drive and relay control applications.
How does the thermal resistance of the 1N5340AE3/TR8 affect PCB layout?
The 1N5340AE3/TR8 has a junction-to-lead thermal resistance of 25°C/W at 10 mm lead length, meaning it requires adequate copper pour or heatsinking on the anode/cathode traces to sustain 5 W dissipation. When mounted on FR4 with 4 mm² pads and 1 mm wide × 25 mm long traces, its junction-to-ambient resistance rises to 85°C/W - limiting continuous power to ~1.47 W at 25°C ambient. Layout must prioritize lead length and copper area to avoid thermal runaway.
Is the 1N5340AE3/TR8 suitable for automotive under-hood applications?
Yes - the 1N5340AE3/TR8 is rated for –65°C to +150°C operating and storage temperature, meets MIL-STD-750 ESD testing (Method 1020), and has moisture sensitivity Level 1, making it suitable for under-hood automotive use. Its 5 W power rating and 14.4 A surge capability support engine control unit (ECU) voltage supervision and alternator regulator feedback circuits where thermal and transient robustness are critical.
1N5340AE3/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:
- ±10%
- 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
1N5340AE3/TR8 FAQ
1.How can I place an order for 1N5340AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340AE3/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 1N5340AE3/TR8 reliable?
The price and inventory of 1N5340AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340AE3/TR8 is usually 5 days.
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1N5340AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340AE3/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 1N5340AE3/TR8?
For technical support, including 1N5340AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340AE3/TR8 requirements.
6.How does Aetrix verify that 1N5340AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5340AE3/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 1N5340AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5340AE3/TR8?
All 1N5340AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340AE3/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 1N5340AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5340AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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