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Microchip Technology 1N5341B/TR8
- Part No.:
- 1N5341B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5341B/TR8.pdf
- Description:
- DIODE ZENER 6.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,892
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Product details
Overview
1N5341B/TR8 from Microsemi is a 5.1 V, ±5% 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), 1.5 Ω dynamic impedance (ZZ), and operates across –65°C to +150°C.
For engineers reviewing the 1N5341B/TR8 datasheet, 1N5341B/TR8 pinout, 1N5341B/TR8 application, or 1N5341B/TR8 equivalent, key selection criteria include Zener voltage stability under varying load/temperature, surge current capability (14.4 A), thermal resistance (25 °C/W junction-to-lead), and RoHS-compliant e3 packaging with tape-and-reel delivery (TR8).
Technical Context
This discrete Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown. Its regulation relies on controlled avalanche and Zener mechanisms, with specified voltage regulation (ΔVZ) of 0.39 V between 10% and 50% of IZM and maximum knee impedance (ZZK) of 400 Ω at 1.0 mA.
It is designed for DC stabilization in linear regulators and clamping circuits, requiring no biasing circuitry. The T-18 package supports axial mounting with cathode band polarity marking, and its 25 °C/W thermal resistance assumes 3/8″ (10 mm) lead length from body for heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% - stable regulation point for 5 V system references |
| Test Current (IZT) | 240 mA - defines nominal operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 1.5 Ω - low AC resistance ensures minimal voltage shift under load transients |
| Max Regulator Current (IZM) | 930 mA - maximum continuous DC current at 25°C with adequate heatsinking |
| Surge Current (IZSM) | 14.4 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.39 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Forward Voltage (VF) | 1.2 V max @ 1.0 A - ensures predictable conduction in forward-biased fault conditions |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free thermosetting epoxy meeting UL94V-0, with tin-lead or RoHS-compliant matte-tin plating. Cathode indicated by colored band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to lower-potential node; forms regulated output when cathode is biased higher |
| Cathode | Reverse-bias reference terminal | Banded end; connected to higher-potential node; defines regulated voltage relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions, marking, and reliability testing compliance |
| Moisture sensitivity Level 1 | No dry pack required prior to soldering-simplifies handling and assembly logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant e3 suffix option | Meets EU Directive 2011/65/EU without compromising electrical performance or thermal rating |
| Tape-and-reel packaging (TR8) | Enables automated pick-and-place placement for high-volume SMT-compatible through-hole assembly |
Applications
| Power Supply Feedback Loop | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference element in secondary-side error amplifier circuit, setting precise 5.1 V threshold for TL431-like comparator operation. Use Value: Maintains ±1% output regulation across line/load/temperature with 0.39 V ΔVZ and 1.5 Ω ZZ. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from accidental 12 V or 24 V rail exposure. IC Role / Device Role / Timing Role: Shunt clamping device placed between signal line and ground, conducting only above 5.1 V. Use Value: Absorbs 14.4 A surge (8.3 ms) without failure, limiting transient voltage to ≤5.5 V at 1 A clamp current. |
| Precision Voltage Reference | Current Source Biasing |
Use Scenario: Providing stable bias for op-amp-based current sources or analog sensor excitation circuits. IC Role / Device Role / Timing Role: Two-terminal passive reference generating fixed 5.1 V potential independent of supply variation. Use Value: Delivers <±0.5% drift over –40°C to +85°C ambient due to low thermal coefficient and tight ±5% initial tolerance. | Use Scenario: Setting constant current in LED driver or laser diode bias circuits via series resistor + Zener configuration. IC Role / Device Role / Timing Role: Voltage reference establishing fixed drop across current-setting resistor. Use Value: Enables 1% current accuracy with 240 mA IZT and 1.5 Ω ZZ minimizing current error from load changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5341B (non-TR8) | Identical electrical specs and T-18 package; differs only in packaging format (bulk vs. tape-and-reel) | No functional difference; TR8 variant required for automated assembly | Select 1N5341B/TR8 when using pick-and-place equipment; choose bulk 1N5341B for manual prototyping or low-volume rework |
| MMBZ5231B (SOT-23) | Same 5.1 V ±5%, but 0.5 W rating, 100 mA IZM, surface-mount package, higher ZZ (17 Ω) | Limited to low-power signal-level clamping or biasing; unsuitable for >100 mW dissipation | Choose MMBZ5231B only for space-constrained PCBs where power dissipation remains below 300 mW |
Compared with 1N5341B/TR8, the bulk 1N5341B offers identical performance with manual handling flexibility, while MMBZ5231B trades power capability and thermal robustness for miniaturization-making it viable only in low-dissipation signal-path roles.
Availability
1N5341B/TR8 is available at Aetrix Electronics and suitable for power supply feedback loops, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5341B/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing wide temperature range (–65°C to +150°C), high surge survivability, and JEDEC-standardized mechanical reliability.
FAQ
What is the Zener voltage tolerance of the 1N5341B/TR8?
The 1N5341B/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its nominal 5.1 V Zener voltage falls within 4.845 V to 5.355 V at 240 mA test current and 25°C lead temperature. This tolerance is tighter than the ±10% "A" suffix and looser than ±2% "C" or ±1% "D" variants in the same family.
Can the 1N5341B/TR8 be used in surface-mount designs?
No, the 1N5341B/TR8 uses a T-18 axial-leaded package and is not a surface-mount device. For SMT equivalents, Microsemi offers the SMBJ5341B or SMBG5341B in DO-214AA/DO-214AB packages. These share identical electrical specifications but require different PCB footprints and reflow profiles compared to the through-hole 1N5341B/TR8.
What is the maximum power dissipation of the 1N5341B/TR8 at 75°C ambient?
At 75°C ambient temperature on an FR4 board (1 oz Cu, 4 mm² pads), the 1N5341B/TR8 derates to approximately 2.7 W. This is calculated using its 85°C/W junction-to-ambient thermal resistance and the 5 W rating at 25°C, following the linear derating curve in Figure 1 of the datasheet. Full 5 W operation requires maintaining lead temperature ≤25°C via heatsinking.
Does the 1N5341B/TR8 meet RoHS requirements?
Yes, the 1N5341B/TR8 is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer designation (1N5341B/TR8, e3). This indicates lead-free matte-tin plating and compliance with EU Directive 2011/65/EU. The device contains no restricted substances above threshold limits and is suitable for environmentally regulated production environments.
How is polarity marked on the 1N5341B/TR8?
The cathode of the 1N5341B/TR8 is marked by a distinct colored band on the body of the T-18 package. During operation, the banded end must be held at a higher potential than the anode to achieve Zener breakdown and regulation. Reversing polarity subjects the device to forward conduction (VF ≤ 1.2 V @ 1 A), which is non-regulatory and may cause unintended current paths if misapplied.
1N5341B/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):
- 6.2 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
1N5341B/TR8 FAQ
1.How can I place an order for 1N5341B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5341B/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 1N5341B/TR8 reliable?
The price and inventory of 1N5341B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5341B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5341B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5341B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5341B/TR8?
1N5341B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5341B/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 1N5341B/TR8?
For technical support, including 1N5341B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5341B/TR8 requirements.
6.How does Aetrix verify that 1N5341B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5341B/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 1N5341B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5341B/TR8?
All 1N5341B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5341B/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 1N5341B/TR8 part is unused and in its original packaging.
Return procedure for 1N5341B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5341B/TR8 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
Diodes Incorporated
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BZT52C15-7-F
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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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