My Inquiry
My Account
Microchip Technology 1N5348BE3/TR8
- Part No.:
- 1N5348BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348BE3/TR8.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,592
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5348BE3/TR8 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 power supply feedback loops.
For engineers reviewing the 1N5348BE3/TR8 datasheet, 1N5348BE3/TR8 pinout, 1N5348BE3/TR8 application, or 1N5348BE3/TR8 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 operating in reverse breakdown mode. Its Zener voltage is specified at 125 mA (IZT), with dynamic impedance measured at 1 kHz AC superimposed on DC bias, and voltage regulation defined as the difference between voltages at 10% and 50% of IZM.
The 1N5348BE3/TR8 features a void-free thermosetting epoxy T-18 package with tin-lead or RoHS-compliant matte-tin plating, cathode band polarity marking, and moisture sensitivity level 1 per J-STD-020B-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±5% - stable regulation point for feedback networks requiring tight voltage reference |
| Test Current (IZT) | 125 mA - defines operating point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 2.5 Ω max at 125 mA - low impedance ensures minimal voltage shift under load variation |
| Max Reverse Current (IR) | 5.0 μA at 8.0 V - confirms sharp knee and low leakage below regulation threshold |
| Power Dissipation (PD) | 5.0 W at TL = 25°C (3/8″ lead length) - requires heat sinking above ambient derating curve |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with discrete lead-mounting constraints |
| Surge Current (IZSM) | 8.0 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 0.25 V - quantifies VZ stability across 10–50% of max current (IZM) |
Pinout & Package
T-18 axial-leaded plastic package with cathode indicated by color 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 | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; connected to unregulated input via series resistor and supplies regulated voltage to load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| ±5% voltage tolerance (B suffix) | Supports mid-precision regulation without trimming, balancing cost and accuracy |
| RoHS-compliant e3 termination | Meets environmental compliance requirements without sacrificing solderability or reliability |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life restrictions for assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD controls during assembly |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 11 V reference to TL431 or similar error amplifier. Use Value: Tight 5% tolerance and low ΔVZ ensure stable regulation across line/load transients and temperature drift. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient spikes exceeding 11 V. IC Role / Device Role / Timing Role: Passive overvoltage protector absorbing energy from ESD or inductive kickback events. Use Value: 8.0 A surge rating and low ZZ enable fast clamping response with minimal overshoot before breakdown. |
| Industrial Sensor Excitation | Programmable Voltage Reference |
Use Scenario: Supplies stable excitation voltage to resistive bridge sensors in harsh-temperature environments. IC Role / Device Role / Timing Role: Precision shunt reference maintaining constant bias current through sensor elements. Use Value: Operation from –65°C to +150°C and low thermal resistance support reliable performance in extended industrial ranges. | Use Scenario: Configured with external resistors to generate custom reference voltages in analog front-ends. IC Role / Device Role / Timing Role: Adjustable reference source enabling multi-range ADC or DAC calibration points. Use Value: Low dynamic impedance ensures minimal loading error when driving op-amp inputs or high-impedance nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | No e3 RoHS suffix; tin-lead termination only | Not suitable for lead-free assembly processes | Select 1N5348B only if legacy tin-lead reflow is confirmed in manufacturing flow |
| MMSZ5242B-TP | Surface-mount SOD-123 package; 11 V ±5%; 500 mW rating | Lower power handling (500 mW vs. 5 W); unsuitable for high-current regulation | Choose MMSZ5242B-TP only for space-constrained PCBs where thermal mass and current demand are low |
Compared with 1N5348BE3/TR8, the 1N5348B lacks RoHS compliance but matches all electrical specs, while MMSZ5242B-TP offers footprint reduction at the cost of 90% lower power dissipation and different thermal management requirements.
Availability
1N5348BE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor excitation systems requiring stable component supply and long-term obsolescence mitigation.
Supply support for 1N5348BE3/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 for robust, high-power voltage regulation in mission-critical power systems where thermal stability, surge resilience, and long-term parametric consistency are essential.
FAQ
What is the Zener voltage tolerance of the 1N5348BE3/TR8?
The 1N5348BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 11 V regulation voltage falls within 10.45 V to 11.55 V at 125 mA test current and 25°C lead temperature. The tolerance remains valid across the full operating temperature range of –65°C to +150°C, as verified in Microsemi's published electrical characteristics table.
Does the 1N5348BE3/TR8 require dry packing before use?
No, the 1N5348BE3/TR8 does not require dry packing. It carries moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at standard ambient conditions without desiccant or humidity-controlled packaging. This simplifies inventory handling and eliminates floor-life tracking during assembly.
What is the maximum surge current rating for the 1N5348BE3/TR8?
The 1N5348BE3/TR8 has a maximum non-recurrent surge current (IZSM) of 8.0 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without degradation, making it suitable for clamping inductive switching spikes or ESD events in industrial power interfaces.
How is polarity marked on the 1N5348BE3/TR8?
The 1N5348BE3/TR8 uses a cathode band marking: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown mode. This polarity is consistent across all 1N53xxB devices and is visible as a single dark stripe near one lead end of the T-18 axial package.
What does the "TR8" suffix indicate in 1N5348BE3/TR8?
"TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm tape width and component orientation optimized for automated pick-and-place equipment. This format supports high-volume SMT assembly and is distinct from bulk or ammo-pack options, ensuring consistent feeding and placement accuracy for the 1N5348BE3/TR8.
1N5348BE3/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):
- 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/TR8 FAQ
1.How can I place an order for 1N5348BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348BE3/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 1N5348BE3/TR8 reliable?
The price and inventory of 1N5348BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5348BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5348BE3/TR8?
1N5348BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348BE3/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 1N5348BE3/TR8?
For technical support, including 1N5348BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348BE3/TR8 requirements.
6.How does Aetrix verify that 1N5348BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5348BE3/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 1N5348BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5348BE3/TR8?
All 1N5348BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348BE3/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 1N5348BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5348BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348BE3/TR8 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
