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Microchip Technology 1N5348BE3/TR12
- Part No.:
- 1N5348BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348BE3/TR12.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,379
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Product details
Overview
1N5348BE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±5% tolerance (B suffix), maximum dynamic impedance of 2.5 Ω at 125 mA test current, and maximum reverse current of 5.0 μA at 8.0 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5348BE3/TR12 datasheet, 1N5348BE3/TR12 pinout, 1N5348BE3/TR12 application, or 1N5348BE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (8.0 A), voltage regulation (ΔVZ = 0.25 V), and RoHS-compliant e3 termination.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output across wide current variation (IZM = 430 mA at TL = 25 °C). Its low dynamic impedance (2.5 Ω) and tight ±5% VZ tolerance ensure minimal voltage drift under load changes.
The 1N5348BE3/TR12 uses void-free thermosetting epoxy encapsulation (UL94V-0), tin-plated leads compliant with MIL-STD-750 Method 2026, and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. Cathode polarity is marked by a band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±5% - precise regulation point for 12 V rail clamping or reference generation |
| Power Dissipation | 5.0 W at TL = 25 °C - requires ≥10 mm lead length from body for full rating |
| Test Current (IZT) | 125 mA - operating point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 2.5 Ω max - ensures <0.3 V output shift per 100 mA load change near IZT |
| Max Reverse Current (IR) | 5.0 μA at VR = 8.0 V - guarantees low leakage in standby or high-impedance bias networks |
| Surge Current (IZSM) | 8.0 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with standard lead heatsinking |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, cathode indicated by color band. Leads are annealed matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in regulation | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input rail or voltage source to clamp/limit voltage |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant termination | e3 suffix confirms lead-free matte-tin plating meeting EU RoHS Directive 2011/65/EU |
| Moisture sensitivity level | Level 1 per J-STD-020B - no baking or dry pack required before assembly |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - suitable for handling without special ESD controls |
| Voltage regulation stability | ΔVZ = 0.25 V - difference between VZ measured at 10% and 50% of IZM, enabling predictable error budgeting |
| High surge endurance | Withstands 8.0 A non-recurrent 8.3 ms half-sine surge - protects downstream circuitry from line transients |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated DC-DC converters delivering 12 V output. IC Role / Device Role / Timing Role: Zener diode providing fixed 11 V reference to optocoupler feedback network. Use Value: Maintains ±1% output regulation over line/load variations due to low ΔVZ and 2.5 Ω ZZ. |
Use Scenario: Clamping input rail against surges in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy above 11 V to ground during EFT or lightning-induced transients. Use Value: Survives 8.0 A surge events without parameter shift, preserving system reliability per IEC 61000-4-4. |
| Temperature-Stable Reference Source | Low-Power Bias Network |
Use Scenario: Generating precision bias voltage for op-amp comparators in environmental sensor interfaces. IC Role / Device Role / Timing Role: Voltage reference element in high-impedance divider network feeding comparator input. Use Value: Delivers stable 11 V across –40 °C to +85 °C ambient due to low thermal coefficient and 25 °C/W RθJL. |
Use Scenario: Establishing gate bias for discrete MOSFET switches in battery management systems. IC Role / Device Role / Timing Role: Zener-based voltage clamp defining safe turn-on threshold for N-channel high-side switch. Use Value: Limits gate drive to ≤11 V with only 5.0 μA leakage at 8.0 V, minimizing quiescent current in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B (non-e3, tape-and-reel) | Same electrical specs and package, but SnPb lead finish and no RoHS compliance | Not suitable for new designs targeting EU/China RoHS compliance | Select 1N5348BE3/TR12 when lead-free assembly and environmental compliance are mandatory |
| MMSZ5242BT1G (ON Semiconductor) | Surface-mount SOD-123, 500 mW rating, 12 V nominal, ±5%, ZZ = 30 Ω @ 20 mA | Lower power, higher impedance, unsuitable for 430 mA continuous operation | Choose MMSZ5242BT1G only for space-constrained PCBs where 5 W dissipation is not required |
Compared with 1N5348B and MMSZ5242BT1G, the 1N5348BE3/TR12 uniquely combines 5 W axial-leaded power handling, 2.5 Ω dynamic impedance, RoHS-compliant termination, and JEDEC-standardized mechanical form-making it optimal for industrial-grade through-hole voltage regulation where thermal margin and legacy compatibility matter.
Availability
1N5348BE3/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and temperature-stable reference sources requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5348BE3/TR12 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 harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5348BE3/TR12?
The 1N5348BE3/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its actual regulation voltage falls within 10.45 V to 11.55 V at 125 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS-compliant matte-tin plating, and TR12 denotes tape-and-reel packaging per EIA-296 standard.
Can the 1N5348BE3/TR12 be used in surface-mount designs?
No-the 1N5348BE3/TR12 is an axial-leaded T-18 (DO-204AL) package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5348B series in SMB package, which shares identical electrical specifications but requires reflow-compatible layout and thermal pad design.
What is the maximum steady-state current the 1N5348BE3/TR12 can handle at room temperature?
The 1N5348BE3/TR12 supports a maximum Zener current (IZM) of 430 mA at 25 °C lead temperature (TL). This value assumes 3/8 inch (10 mm) lead length from the body for effective heat conduction. On FR4 board with 1 oz copper, derated power drops to 1.47 W, limiting usable current to approximately 134 mA at 11 V.
How does the 1N5348BE3/TR12 perform under surge conditions?
The 1N5348BE3/TR12 is rated for a peak non-recurrent surge current (IZSM) of 8.0 A with 8.3 ms half-sine waveform duration. This capability allows it to absorb transient energy from ESD, EFT, or inductive switching spikes without parameter shift-verified per Microsemi's characterization in Rev D datasheet.
Is the 1N5348BE3/TR12 suitable for automotive applications?
The 1N5348BE3/TR12 is not AEC-Q200 qualified and lacks automotive-specific screening (e.g., JANTXV). While its operating temperature range (–65 °C to +150 °C) exceeds typical automotive requirements, Microsemi recommends JAN1N5348B or JANTXV1N5348B variants for under-hood or safety-critical use where MIL-PRF-19500 screening is mandated.
1N5348BE3/TR12 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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 8 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
1N5348BE3/TR12 FAQ
1.How can I place an order for 1N5348BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348BE3/TR12 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 1N5348BE3/TR12 reliable?
The price and inventory of 1N5348BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5348BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348BE3/TR12 transactions.
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4.How is shipping managed for 1N5348BE3/TR12?
1N5348BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348BE3/TR12 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 1N5348BE3/TR12?
For technical support, including 1N5348BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348BE3/TR12 requirements.
6.How does Aetrix verify that 1N5348BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5348BE3/TR12 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 1N5348BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5348BE3/TR12?
All 1N5348BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348BE3/TR12, 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 1N5348BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5348BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348BE3/TR12 Tags
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