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Microchip Technology 1N5340B/TR8
- Part No.:
- 1N5340B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340B/TR8.pdf
- Description:
- DIODE ZENER 6V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
1N5340B/TR8 from Microsemi is a 5.0 W, 6.0 V ±5% axial-leaded silicon Zener diode optimized for voltage regulation in power supply reference and overvoltage protection circuits. It delivers stable regulation at 200 mA test current (IZT), exhibits low dynamic impedance (1.0 Ω at IZT), and maintains performance across -65°C to +150°C operating temperature range.
For engineers reviewing the 1N5340B/TR8 datasheet, 1N5340B/TR8 pinout, 1N5340B/TR8 application, or 1N5340B/TR8 equivalent, key selection criteria include its 6.0 V nominal Zener voltage, ±5% tolerance (B suffix), 790 mA maximum Zener current (IZM), low 1.0 Ω dynamic impedance, and T-18 axial package with cathode band polarity marking.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 6.0 V reference across a wide current range (1.0 mA to 790 mA). Its 1.0 Ω dynamic impedance (ZZ) at 200 mA ensures minimal voltage variation under load changes, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5.0 W dissipation with adequate lead-length heat sinking.
The device features RoHS-compliant matte-tin plating, UL94V-0 epoxy encapsulation, and meets MIL-STD-750 Method 1020 for ESD insensitivity. It is rated for 14.4 A non-repetitive surge current (8.3 ms half-sine) and exhibits 0.19 V voltage regulation (ΔVZ) between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V ±5% - precise reference voltage at 200 mA, enabling accurate regulation in feedback loops |
| Power Dissipation | 5.0 W at TL = 25°C (3/8" lead length) - supports high-current regulation without forced cooling |
| Dynamic Impedance (ZZ) | 1.0 Ω at IZT = 200 mA - ensures <10 mV output shift per 10 mA load change |
| Max Zener Current (IZM) | 790 mA - defines safe continuous reverse conduction limit at rated power |
| Voltage Regulation (ΔVZ) | 0.19 V - difference between VZ measured at 79 mA and 395 mA, indicating tight regulation linearity |
| Thermal Resistance | 25 °C/W junction-to-lead - allows direct thermal path to PCB copper or chassis via leads |
| Surge Current (IZSM) | 14.4 A (8.3 ms half-sine) - withstands transient overloads common in power rail protection |
Pinout & Package
Package: T-18 axial-leaded plastic case (UL94V-0 epoxy), cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference node | Connected to lower-potential side of regulated circuit; carries full Zener current during regulation |
| Cathode | Regulated output node | Banded end; provides stable 6.0 V reference relative to anode; must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully standardized 1N-series part with guaranteed mechanical and electrical interchangeability |
| ±5% voltage tolerance (B suffix) | Reduces need for post-assembly trimming in mid-precision reference designs |
| Level 1 moisture sensitivity | No dry-pack requirement - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - robust against handling and board-level ESD events |
| RoHS compliant (e3 suffix) | Meets global environmental compliance without performance trade-offs |
Applications
| DC Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete pass-transistor circuits. IC Role / Device Role / Timing Role: Zener reference element providing fixed 6.0 V threshold for error amplifier comparison. Use Value: Enables ±1% output regulation accuracy with minimal external components due to tight 6.0 V ±5% tolerance and low ΔVZ. |
Use Scenario: Clamping transient spikes on 5 V or 6 V logic rails or sensor interfaces. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when rail exceeds 6.0 V. Use Value: Withstands 14.4 A surge (8.3 ms) and regulates within 0.19 V across 79–395 mA, preventing downstream IC damage. |
| Industrial Sensor Excitation | Programmable Logic Controller (PLC) Input Conditioning |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges) in harsh environments. IC Role / Device Role / Timing Role: Precision voltage source maintaining constant bias across temperature (-65°C to +150°C). Use Value: Low 25 °C/W thermal resistance and wide operating temperature range ensure stable 6.0 V output despite ambient fluctuations. |
Use Scenario: Level-shifting and clamping 24 V field inputs to 5 V logic levels in modular PLC backplanes. IC Role / Device Role / Timing Role: Front-end protection and voltage limiting element before optocoupler or ADC input stages. Use Value: Axial T-18 package allows through-hole mounting with mechanical robustness; RoHS/e3 compliance supports industrial lifecycle requirements. |
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 (bulk) | Identical electrical specs and T-18 package; differs only in packaging (tape-and-reel TR8 vs. bulk) | No functional difference; TR8 enables automated pick-and-place, bulk suits manual prototyping | Select 1N5340B/TR8 for SMT production lines requiring reel-fed placement |
| MMBZ5234B (SOT-23) | Same 6.0 V ±5%, but 0.35 W rating, surface-mount, 22 Ω ZZ - lower power, higher impedance | Suitable for low-current signal-level clamping; not viable for 5 W regulation or high-surge scenarios | Choose MMBZ5234B only where board space is critical and power dissipation ≤350 mW |
Compared with 1N5340B/TR8, the bulk variant offers identical performance with manual handling advantages, while MMBZ5234B trades power capability and surge robustness for miniaturization - making 1N5340B/TR8 the sole choice for 5 W, high-reliability, through-hole Zener regulation.
Availability
1N5340B/TR8 is available at Aetrix Electronics and suitable for DC power supply reference, overvoltage protection clamp, and industrial sensor excitation requiring stable component supply and long-term manufacturability.
Supply support for 1N5340B/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 1N53xxB series was designed specifically for ruggedized voltage regulation in mission-critical power systems where thermal stability, surge immunity, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5340B/TR8?
The 1N5340B/TR8 has a nominal Zener voltage of 6.0 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This tolerance is verified at 200 mA test current and 25°C lead temperature, ensuring predictable regulation behavior in production designs without post-manufacturing calibration.
Can the 1N5340B/TR8 be used in surface-mount applications?
No - the 1N5340B/TR8 uses a T-18 axial-leaded package intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5340B (DO-214AA) and SMBG5340B (DO-214AB), which share the same 6.0 V ±5% specification but differ in thermal performance and footprint.
What is the maximum steady-state power dissipation for the 1N5340B/TR8 on a standard PCB?
When mounted on a FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5340B/TR8 is rated for 1.47 W steady-state power at 25°C ambient. This derates linearly above 25°C per the published curve in Figure 1 of the datasheet, reaching zero at ~115°C ambient.
Does the 1N5340B/TR8 meet RoHS requirements?
Yes - the "e3" suffix in the full ordering designation (1N5340B/TR8 e3) confirms RoHS compliance per EU Directive 2011/65/EU. The device uses RoHS-compliant matte-tin lead plating and halogen-free epoxy encapsulation, with full material declarations available from Microchip.
How is polarity marked on the 1N5340B/TR8?
The 1N5340B/TR8 uses a cathode band - a single colored stripe near one end of the cylindrical body - to identify the cathode terminal. During operation, the banded end must be held at a higher potential than the anode (unbanded end) to achieve Zener breakdown and regulation.
1N5340B/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:
- ±5%
- 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
1N5340B/TR8 FAQ
1.How can I place an order for 1N5340B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340B/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 1N5340B/TR8 reliable?
The price and inventory of 1N5340B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5340B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5340B/TR8?
1N5340B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340B/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 1N5340B/TR8?
For technical support, including 1N5340B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340B/TR8 requirements.
6.How does Aetrix verify that 1N5340B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5340B/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 1N5340B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5340B/TR8?
All 1N5340B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340B/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 1N5340B/TR8 part is unused and in its original packaging.
Return procedure for 1N5340B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5340B/TR8 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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