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Microchip Technology 1N5343BE3/TR13
- Part No.:
- 1N5343BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343BE3/TR13.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,581
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Product details
Overview
1N5343BE3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 7.5 V ±5%, 175 mA test current (IZT), 1.5 Ω dynamic impedance (ZZ), and maximum reverse current of 10 μA at 5.4 V. 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 1N5343BE3/TR13 datasheet, 1N5343BE3/TR13 pinout, 1N5343BE3/TR13 application, or 1N5343BE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (10.7 A), voltage regulation (ΔVZ = 0.15 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-bias mode, maintaining stable output voltage across wide current variation (10–175 mA) and temperature range. Its low dynamic impedance ensures minimal voltage deviation under load transients, while its 25 °C/W thermal resistance enables high steady-state current operation when mounted with 3/8″ lead length from body.
The 1N5343BE3/TR13 uses a void-free thermosetting epoxy case (UL94V-0), cathode band polarity marking, and is rated for 260 °C soldering (10 s). It meets JEDEC 1N53xxB series specifications and supports tape-and-reel packaging (TR13 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±5% - defines precise regulation point for feedback networks |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 1.5 Ω - low AC resistance ensures tight voltage control under varying load |
| Max Reverse Current (IR) | 10 μA @ 5.4 V - leakage threshold confirming stable regulation onset |
| Max Regulator Current (IZM) | 630 mA - peak DC current before thermal runaway (at TL = 25 °C) |
| Surge Current (IZSM) | 10.7 A - non-repetitive 8.3 ms half-sine capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ at 10% and 50% of IZM, indicating line regulation fidelity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plated leads, cathode indicated by band. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input rail and feedback network; maintains 7.5 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables accurate setpoint control without post-calibration in mid-precision supplies |
| 25 °C/W junction-to-lead thermal resistance | Supports 5 W continuous dissipation with simple mechanical heat sinking (3/8″ lead length) |
| RoHS-compliant e3 suffix | Meets global environmental compliance without performance trade-off |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints for SMT assembly prep |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled secondary-side feedback loop of 24 V/5 A isolated DC-DC converter. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 7.5 V setpoint to TL431-like error amplifier. Use Value: Maintains ±1.5% output regulation across line/load/temperature due to low ΔVZ and stable VZ drift. | Use Scenario: Provides excitation reference for 4–20 mA current-loop pressure sensor transmitter. IC Role / Device Role / Timing Role: Precision Zener reference replacing higher-cost bandgap ICs in analog front-end. Use Value: Delivers 7.5 V ±0.375 V over –40 °C to +85 °C, enabling <0.05% FS error contribution. |
| Overvoltage Clamp for MCU I/O | Programmable Threshold Detector |
Use Scenario: Protects 3.3 V GPIO pin of ARM Cortex-M4 against 12 V transients on shared bus lines. IC Role / Device Role / Timing Role: Transient voltage clamp placed between I/O and ground with series resistor. Use Value: Clamps spikes above 7.5 V with 10.7 A surge capacity, limiting pin voltage to safe levels within 100 ns. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout at 7.5 V threshold. IC Role / Device Role / Timing Role: Stable reference input to LM393 comparator driving enable logic. Use Value: Ensures consistent 7.5 V switching point across temperature with <0.15 V hysteresis-induced error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B (non-e3, non-TR) | Same electrical specs but leaded SnPb plating and bulk packaging; no RoHS or tape-and-reel compliance | Suitable only for legacy non-RoHS designs or prototyping without automated placement | Select 1N5343BE3/TR13 for production requiring RoHS and pick-and-place compatibility |
| MMBZ5233BS-7-F (Diodes Inc.) | Surface-mount SOD-123 package; 7.5 V ±5%; 100 mW rating; 100 Ω ZZ; 50 nA IR @ 5.7 V | Limited to low-power signal-level clamping; not suitable for >100 mA regulation or surge suppression | Choose MMBZ5233BS-7-F only for space-constrained PCBs where 5 W dissipation is unnecessary |
Compared with 1N5343B and MMBZ5233BS-7-F, the 1N5343BE3/TR13 uniquely combines 5 W power handling, axial-leaded robustness, RoHS compliance, and tape-and-reel readiness-making it optimal for industrial power supply and protection modules requiring field reliability and manufacturing scalability.
Availability
1N5343BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, sensor reference circuits, overvoltage protection systems, and programmable threshold detectors requiring stable component supply and long-term lifecycle support.
Supply support for 1N5343BE3/TR13 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal stability, surge resilience, and long-term parametric consistency under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5343BE3/TR13?
The 1N5343BE3/TR13 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its nominal 7.5 V regulation voltage falls within 7.125 V to 7.875 V at 25 °C with 175 mA test current. The tolerance remains stable across its full operating temperature range (–65 °C to +150 °C), supporting predictable design margins in industrial power applications.
Can the 1N5343BE3/TR13 be used in surface-mount designs?
No-the 1N5343BE3/TR13 is an axial-leaded T-18 (DO-204AL) package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5343B series in SMB package. The 1N5343BE3/TR13 requires through-hole mounting with minimum 3/8″ (10 mm) lead length from body for rated 5 W dissipation.
What is the maximum steady-state power dissipation of the 1N5343BE3/TR13 on a standard FR4 board?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5343BE3/TR13 has a steady-state power rating of 1.47 W at 25 °C ambient. This derates linearly above 25 °C per the published thermal resistance of 85 °C/W junction-to-ambient. Full 5 W operation requires junction-to-lead cooling with ≥3/8″ lead length.
Does the 1N5343BE3/TR13 meet RoHS requirements?
Yes-the "e3" suffix explicitly denotes RoHS compliance per EU Directive 2011/65/EU. The device uses annealed matte-tin plating on leads and void-free UL94V-0 epoxy encapsulation, with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. Certificate of Compliance is available upon request for 1N5343BE3/TR13.
What is the surge current rating of the 1N5343BE3/TR13 and how is it defined?
The 1N5343BE3/TR13 has a maximum non-repetitive surge current (IZSM) of 10.7 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating enables reliable transient suppression in power rails exposed to inductive kickback or lightning-induced surges, provided the device is operated within its thermal limits and not subjected to repetitive events.
1N5343BE3/TR13 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.4 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
1N5343BE3/TR13 FAQ
1.How can I place an order for 1N5343BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343BE3/TR13 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 1N5343BE3/TR13 reliable?
The price and inventory of 1N5343BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5343BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5343BE3/TR13 transactions.
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4.How is shipping managed for 1N5343BE3/TR13?
1N5343BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5343BE3/TR13 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 1N5343BE3/TR13?
For technical support, including 1N5343BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343BE3/TR13 requirements.
6.How does Aetrix verify that 1N5343BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5343BE3/TR13 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 1N5343BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5343BE3/TR13?
All 1N5343BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343BE3/TR13, 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 1N5343BE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5343BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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