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Microchip Technology 1N5346BE3/TR13
- Part No.:
- 1N5346BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346BE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
1N5346BE3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 9.1 V, ±5% tolerance (B suffix), 150 mA maximum Zener current (IZM), 2.0 Ω dynamic impedance (ZZ) at 150 mA test current, and operates from –65°C to +150°C. It serves as a precision voltage reference or shunt regulator in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5346BE3/TR13 datasheet, 1N5346BE3/TR13 pinout, 1N5346BE3/TR13 application, or 1N5346BE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (520 A), voltage regulation (ΔVZ = 0.22 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a shunt voltage regulator by maintaining a stable reverse-biased breakdown voltage across its terminals under varying load and line conditions. Its low dynamic impedance (2.0 Ω) ensures minimal voltage deviation across 10–50% of IZM, and its 25 °C/W thermal resistance enables reliable 5 W operation with 3/8″ lead length heat sinking.
The 1N5346BE3/TR13 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 260 °C soldering (10 s), and complies with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. It exhibits <7.5 μA reverse leakage at 6.6 V (VR) and 0.22 V voltage regulation (ΔVZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% - stable regulation point for feedback or clamping at nominal 150 mA test current |
| Power Dissipation | 5.0 W at TL = 25°C - supports high-current shunt regulation with adequate lead heatsinking |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT = 150 mA - ensures tight voltage stability under dynamic load changes |
| Max Reverse Current (IR) | 7.5 μA at VR = 6.6 V - low leakage preserves efficiency in high-impedance bias networks |
| Thermal Resistance | 25 °C/W junction-to-lead - enables full 5 W operation with 3/8″ (10 mm) lead length from body |
| Voltage Regulation (ΔVZ) | 0.22 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 520 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case with void-free thermosetting epoxy (UL94V-0), cathode indicated by colored band, RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt configuration | Connected to circuit ground or lower-potential rail; carries forward current up to 1.0 A (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; held at precise 9.1 V relative to anode during reverse bias; sinks regulation current up to 150 mA continuously |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB mechanical and electrical specifications for interchangeability |
| ±5% voltage tolerance (B suffix) | Guarantees VZ between 8.65 V and 9.55 V at 25°C, enabling tighter feedback loop control than ±10% variants |
| RoHS-compliant e3 suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and is compatible with lead-free assembly processes |
| Level 1 moisture sensitivity | No dry pack or baking required before SMT/reflow-reduces handling cost and avoids moisture-induced popcorning |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production environments |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt regulator providing precise 9.1 V reference to drive optocoupler LED current. Use Value: Low ΔVZ (0.22 V) and stable VZ over temperature ensure ±1% output regulation accuracy across industrial temperature range. | Use Scenario: Placed across sensitive IC supply rails (e.g., microcontroller VDD) to clamp transients above 9.1 V. IC Role / Device Role / Timing Role: Fast-acting voltage clamp absorbing surge energy via controlled Zener breakdown. Use Value: 520 A surge rating (8.3 ms) and low ZZ enable robust protection against IEC 61000-4-5 surges without crowbar action. |
| Programmable Voltage Reference | Current Source Bias Network |
Use Scenario: Paired with a series resistor to generate a stable bias voltage for op-amp input stages or ADC references. IC Role / Device Role / Timing Role: Precision two-terminal voltage source delivering 9.1 V with minimal drift vs. current. Use Value: Tight ±5% tolerance and 2.0 Ω ZZ reduce output variation to <0.5% across 10–150 mA operating range. | Use Scenario: Configured in constant-current mode with series resistor to bias gate drivers or sensor excitation circuits. IC Role / Device Role / Timing Role: Stable impedance element establishing predictable current flow independent of supply ripple. Use Value: Low thermal resistance (25 °C/W) maintains current stability under ambient temperature swings from –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346BRLG | Same 9.1 V ±5%, 5 W rating, but in tape-and-reel (TR) packaging with "RLG" suffix; identical electrical specs and T-18 package | No functional difference; differs only in packaging format (TR13 vs. RLG denotes reel quantity and carrier type) | Select 1N5346BRLG for automated pick-and-place where reel orientation and leader/tail length match equipment requirements |
| MMBZ5240BLT1G | Surface-mount SOT-23 package, 10 V ±5%, 225 mW Pd - significantly lower power and different footprint | Not suitable for 5 W dissipation; limited to low-power bias/reference roles where board space is constrained | Choose MMBZ5240BLT1G only for space-constrained PCBs accepting reduced power capability and higher thermal resistance |
Compared with 1N5346BE3/TR13, 1N5346BRLG offers identical regulation performance in alternate tape-and-reel form, while MMBZ5240BLT1G provides a compact SMT alternative at 4.5% higher voltage and <5% of the power handling-requiring careful thermal redesign if substituted.
Availability
1N5346BE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and current source bias networks requiring stable component supply and long-term obsolescence management.
Supply support for 1N5346BE3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W axial Zener regulation in harsh-environment power systems where thermal stability, surge resilience, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance for 1N5346BE3/TR13?
The 1N5346BE3/TR13 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's datasheet. This means its regulated voltage falls between 8.65 V and 9.55 V at 25°C with 150 mA test current. The e3 suffix indicates RoHS compliance but does not affect tolerance. This tolerance is tighter than the ±10% option (A suffix) and supports more accurate voltage referencing in feedback networks.
Does 1N5346BE3/TR13 require dry packing before use?
No, the 1N5346BE3/TR13 does not require dry packing before use. It is rated IPC/JEDEC J-STD-020B Level 1 for moisture sensitivity, meaning it can be stored indefinitely at standard ambient conditions without desiccant or baking. This simplifies inventory handling and eliminates moisture-related reflow defects such as popcorn cracking-critical for high-reliability manufacturing lines processing the 1N5346BE3/TR13.
What is the maximum continuous Zener current for 1N5346BE3/TR13?
The maximum continuous Zener current (IZM) for 1N5346BE3/TR13 is 150 mA when operated at 25°C lead temperature (TL) with 3/8″ (10 mm) lead length from the body. This value derives from its 5.0 W power rating and nominal 9.1 V Zener voltage (P = V × I). At elevated temperatures, derating applies per Figure 1 in the datasheet; for example, at TL = 100°C, IZM reduces to approximately 75 mA.
Can 1N5346BE3/TR13 be used in surface-mount designs?
No, the 1N5346BE3/TR13 is an axial-leaded T-18 through-hole device and is not suitable for direct surface-mount assembly. Microsemi offers surface-mount equivalents-SMBJ5346B and SMBG5346B-in DO-214AA and DO-214AB packages respectively-but these differ mechanically and thermally from the 1N5346BE3/TR13. Substituting requires PCB layout revision and thermal validation due to differing thermal resistance and mounting constraints.
What is the surge current rating for 1N5346BE3/TR13?
The 1N5346BE3/TR13 has a peak non-recurrent surge current (IZSM) rating of 520 A for an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure. Engineers should verify that external series impedance limits peak current to ≤520 A during expected surge events-such as lightning-induced spikes or inductive switching transients-to ensure long-term reliability of the 1N5346BE3/TR13.
1N5346BE3/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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.6 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
1N5346BE3/TR13 FAQ
1.How can I place an order for 1N5346BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346BE3/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 1N5346BE3/TR13 reliable?
The price and inventory of 1N5346BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5346BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346BE3/TR13?
1N5346BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346BE3/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 1N5346BE3/TR13?
For technical support, including 1N5346BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346BE3/TR13 requirements.
6.How does Aetrix verify that 1N5346BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5346BE3/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 1N5346BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5346BE3/TR13?
All 1N5346BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346BE3/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 1N5346BE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5346BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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