My Inquiry
My Account
Microchip Technology 1N5344AE3/TR8
- Part No.:
- 1N5344AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344AE3/TR8.pdf
- Description:
- DIODE ZENER 8.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,177
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5344AE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 14 V, ±10% tolerance (A suffix), 2.5 Ω maximum dynamic impedance at 175 mA test current, and 700 mA maximum Zener current when adequately heat-sunk. It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5344AE3/TR8 datasheet, 1N5344AE3/TR8 pinout, 1N5344AE3/TR8 application, or 1N5344AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), reverse leakage (1 μA at 10.1 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode, with Zener voltage specified at 175 mA test current (IZT) and measured at 25 °C lead temperature. Its low dynamic impedance (2.5 Ω) ensures stable regulation under varying load currents.
The 1N5344AE3/TR8 exhibits minimal voltage drift versus current-ΔVZ ≤ 0.25 V between 10% and 50% of IZM-and maintains regulation across –65 °C to +150 °C ambient range. Its T-18 package supports axial mounting with cathode band polarity marking and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V nominal, ±10% tolerance - defines regulated output voltage under specified test conditions |
| Test Current (IZT) | 175 mA - current at which VZ is guaranteed; sets minimum operating current for regulation |
| Dynamic Impedance (ZZ) | 2.5 Ω max - low AC impedance ensures tight voltage regulation against load transients |
| Max Reverse Leakage (IR) | 1 μA at 10.1 V - confirms low off-state power loss in standby or sensing circuits |
| Max Zener Current (IZM) | 700 mA - maximum continuous DC current before thermal runaway, assuming TL < 25 °C |
| Surge Current (IZSM) | 6.7 A peak (8.3 ms half-sine) - enables transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - dictates required heatsinking for sustained 5 W dissipation |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), cathode indicated by band, RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to supply rail requiring stabilization; banded end must be at higher potential |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±10% voltage tolerance (A suffix) | Supports cost-sensitive applications where tighter regulation is not required |
| RoHS-compliant e3 suffix | Meets environmental compliance without performance trade-offs; tin-lead alternative available |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD workstations |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loop in 24 V DC-DC converter. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise 14 V reference to error amplifier. Use Value: Maintains ±0.25 V regulation (ΔVZ) across 70–350 mA load variation, enabling stable output despite line/load changes. |
Use Scenario: Clamping transient spikes on 12 V automotive control bus during load dump. IC Role / Device Role / Timing Role: Passive overvoltage clamp diverting surge energy to ground above 14 V threshold. Use Value: Withstands 6.7 A non-repetitive surge (8.3 ms), protecting downstream logic without crowbar action. |
| Temperature-Stable Reference Source | Programmable Voltage Threshold Detector |
Use Scenario: Generating bias point for analog sensor interface in outdoor environmental monitor. IC Role / Device Role / Timing Role: Zener-based reference for ADC input scaling across –40 °C to +85 °C operating range. Use Value: Low ΔVZ and 25 °C/W RθJL minimize thermal drift; operates reliably from –65 °C to +150 °C. |
Use Scenario: Setting trip point for comparator monitoring battery pack voltage in UPS system. IC Role / Device Role / Timing Role: Fixed 14 V threshold source feeding comparator non-inverting input. Use Value: ±10% tolerance provides adequate margin for 12 V nominal battery; low leakage (<1 μA) avoids loading reference divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B | Same 14 V nominal VZ, but ±5% tolerance (B suffix); 2.5 Ω ZZ unchanged | Higher precision required for feedback references; tighter tolerance increases cost | Select 1N5344B when regulation stability within ±0.7 V is mandatory |
| MMBZ5242B (SOT-23) | Surface-mount, 12 V nominal, ±5%, 100 mW rating - not power-compatible | Only suitable for low-current signal-level referencing, not 5 W power regulation | Choose MMBZ5242B only for space-constrained PCBs with <10 mA Zener current needs |
Compared with 1N5344B, the 1N5344AE3/TR8 trades voltage precision for cost and robustness in high-current regulation; compared with MMBZ5242B, it delivers 50× higher power handling but requires axial through-hole layout and heatsinking.
Availability
1N5344AE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, temperature-stable reference sources, and programmable voltage threshold detectors requiring stable component supply and long-term obsolescence management.
Supply support for 1N5344AE3/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 1N53xx series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance for 1N5344AE3/TR8?
The 1N5344AE3/TR8 has a ±10% Zener voltage tolerance, indicated by the "A" suffix in its part number. This means its actual breakdown voltage falls between 12.6 V and 15.4 V at 175 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance, and TR8 denotes tape-and-reel packaging per EIA-296 standard.
Can 1N5344AE3/TR8 replace 1N5344B in existing designs?
Yes, the 1N5344AE3/TR8 can physically replace 1N5344B since both share identical T-18 package, pinout, and 14 V nominal Zener voltage-but with ±10% vs. ±5% tolerance. Designers must verify that the wider tolerance does not impact regulation accuracy in feedback loops or reference circuits before substitution.
What is the maximum power dissipation of 1N5344AE3/TR8 at room temperature?
The 1N5344AE3/TR8 is rated for 5.0 W steady-state power dissipation at 25 °C lead temperature (TL), provided leads are maintained at ≤25 °C within 3/8 inch (10 mm) of the body. On FR4 board with 1 oz copper, derated power drops to 1.47 W at 25 °C ambient due to higher junction-to-ambient thermal resistance (85 °C/W).
How is polarity marked on 1N5344AE3/TR8?
The 1N5344AE3/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown regulation. Forward voltage is ≤1.2 V at 1.0 A, confirming standard silicon diode behavior in forward bias.
Does 1N5344AE3/TR8 require dry packing or special handling before soldering?
No, the 1N5344AE3/TR8 has IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, meaning it may be stored and assembled without dry packing or floor-life restrictions. Its void-free epoxy body and matte-tin plating also support standard 260 °C/10 s reflow or hand-soldering per MIL-STD-750.
1N5344AE3/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):
- 8.2 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.9 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
1N5344AE3/TR8 FAQ
1.How can I place an order for 1N5344AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344AE3/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 1N5344AE3/TR8 reliable?
The price and inventory of 1N5344AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344AE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5344AE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344AE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344AE3/TR8?
1N5344AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344AE3/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 1N5344AE3/TR8?
For technical support, including 1N5344AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344AE3/TR8 requirements.
6.How does Aetrix verify that 1N5344AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5344AE3/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 1N5344AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5344AE3/TR8?
All 1N5344AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344AE3/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 1N5344AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5344AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5344AE3/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…
