My Inquiry
My Account
Microchip Technology 1N5343AE3/TR8
- Part No.:
- 1N5343AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343AE3/TR8.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,708
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5343AE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 7.5 V, ±10% tolerance (A suffix), 175 mA test current (IZT), and 630 Ω maximum dynamic impedance (ZZ) at IZT. It operates from –65°C to +150°C and is RoHS-compliant (e3 suffix), supplied in tape-and-reel (TR8) for automated assembly in power supply voltage reference circuits.
For engineers reviewing the 1N5343AE3/TR8 datasheet, 1N5343AE3/TR8 pinout, 1N5343AE3/TR8 application, or 1N5343AE3/TR8 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 lead-free plating compliance per MIL-STD-750.
Technical Context
This device functions as a precision shunt voltage regulator in DC power rails and feedback networks. Its low 25 °C/W thermal resistance enables stable operation at up to 5 W when leads are mounted 10 mm from body, and its 1.0 μA reverse leakage at VR = 5.4 V ensures minimal standby current in biasing applications.
The 1N5343AE3/TR8 exhibits a knee impedance (ZZK) of 200 Ω at 1.0 mA and maintains regulation across 10–50% of IZM (175 mA), delivering ΔVZ = 0.15 V - critical for analog reference stability in industrial sensor signal conditioning and linear regulator error amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±10% - sets regulated output level in shunt reference designs |
| Test Current (IZT) | 175 mA - operating point where VZ and ZZ are specified; defines minimum stable bias current |
| Max Dynamic Impedance (ZZ) | 630 Ω at IZT - limits AC ripple rejection in voltage references |
| Max Regulator Current (IZM) | 630 mA - maximum continuous DC current before thermal runaway under heatsink conditions |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W dissipation with ≤25 °C rise above lead temperature |
| Surge Current (IZSM) | 10.7 A (8.3 ms half-sine) - withstands transient overvoltage events in input protection stages |
| Voltage Regulation (ΔVZ) | 0.15 V - difference between VZ measured at 10% and 50% of IZM; indicates regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated voltage node | Banded end; supplies stable 7.5 V to load when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction (e3) | Meets EU Directive 2011/65/EU; matte-tin plating eliminates lead-based solder compatibility issues |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - survives >4 kV HBM without parameter shift |
| High surge current capability | 10.7 A peak (8.3 ms) - protects downstream circuitry during line transients |
| Stable regulation over temperature | Operates from –65°C to +150°C - suitable for automotive engine bay and industrial motor drive environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 7.5 V setpoint for op-amp comparator inputs. Use Value: Delivers 0.15 V regulation spread (ΔVZ) across 10–50% of IZM, ensuring <2% output variation under load step changes. | Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in industrial PLC modules. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping rail voltage to 7.5 V + forward drop during surges. Use Value: Withstands 10.7 A non-repetitive surge (8.3 ms), limiting clamp voltage to ≤9.2 V at peak current per datasheet curve. |
| Sensor Biasing Network | Analog Signal Conditioning |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in HVAC control systems. IC Role / Device Role / Timing Role: Low-drift voltage source for Wheatstone bridge excitation, minimizing self-heating error. Use Value: 25 °C/W thermal resistance prevents >1.5 °C junction rise at 60 mA bias, preserving RTD accuracy. | Use Scenario: Setting gain and offset in instrumentation amplifier front-ends for strain gauge interfaces. IC Role / Device Role / Timing Role: Precision DC reference for DAC output calibration and ADC reference scaling. Use Value: 630 Ω dynamic impedance ensures <0.5 mV ripple coupling into high-impedance op-amp inputs at 1 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | ±5% VZ tolerance (vs. ±10% for 1N5343AE3/TR8); same VZ, IZT, ZZ, and package | Higher precision needed in feedback loops where 0.375 V tolerance margin is insufficient | Select 1N5343B when tighter regulation stability is required without changing layout or thermal design |
| MMBZ5231BS | Surface-mount SOD-123 package; 7.5 V ±5%, 20 mA IZT, 17 Ω ZZ - lower power (500 mW), not drop-in | Space-constrained PCBs where axial leads are incompatible with automated placement | Choose MMBZ5231BS only when board area is critical and power dissipation ≤0.5 W is acceptable |
Compared with 1N5343B and MMBZ5231BS, the 1N5343AE3/TR8 offers the lowest cost-per-watt solution for through-hole 5 W regulation, retains full JEDEC 1N53xx compatibility, and supports tape-and-reel automation while maintaining legacy design continuity.
Availability
1N5343AE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with RoHS compliance and tape-and-reel packaging.
Supply support for 1N5343AE3/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 robustness, surge immunity, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5343AE3/TR8?
The 1N5343AE3/TR8 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. Its nominal regulation voltage is 7.5 V, meaning the actual VZ falls between 6.75 V and 8.25 V at 25°C under IZT = 175 mA. This tolerance is confirmed in the Electrical Characteristics table on page 1 of the Microsemi datasheet (Rev D, 2008).
Does the 1N5343AE3/TR8 require dry packing for moisture sensitivity?
No, the 1N5343AE3/TR8 does not require dry packing. It carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, verified in the Features section of the datasheet. This means it can be stored indefinitely at ambient conditions without baking prior to reflow, simplifying manufacturing logistics.
What is the maximum steady-state power dissipation for the 1N5343AE3/TR8 on a standard FR4 PCB?
When mounted on an FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5343AE3/TR8 delivers 1.47 W steady-state power at TA = 25°C. This value is derived from its 85 °C/W junction-to-ambient thermal resistance, as specified in the Maximum Ratings table on page 1 of the Microsemi datasheet.
Can the 1N5343AE3/TR8 be used as a direct replacement for the 1N5343B in existing designs?
The 1N5343AE3/TR8 is not a direct replacement for the 1N5343B due to its wider ±10% voltage tolerance versus the B suffix's ±5%. While both share identical package, pinout, and thermal specs, substituting them may cause out-of-spec regulation in feedback loops requiring tighter VZ accuracy. Verify loop stability and output tolerance margins before interchange.
What does the "e3" and "TR8" suffix indicate in 1N5343AE3/TR8?
The "e3" suffix denotes RoHS-compliant matte-tin lead plating per JEDEC standards, and "TR8" specifies EIA-296-compliant tape-and-reel packaging with 8 mm carrier tape width and 1,000 units per reel. Both suffixes are defined in the Features and Mechanical and Packaging sections of the Microsemi 1N5333B–1N5388B datasheet.
1N5343AE3/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):
- 7.5 V
- Tolerance:
- ±10%
- 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
1N5343AE3/TR8 FAQ
1.How can I place an order for 1N5343AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343AE3/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 1N5343AE3/TR8 reliable?
The price and inventory of 1N5343AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343AE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5343AE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5343AE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5343AE3/TR8?
1N5343AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5343AE3/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 1N5343AE3/TR8?
For technical support, including 1N5343AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343AE3/TR8 requirements.
6.How does Aetrix verify that 1N5343AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5343AE3/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 1N5343AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5343AE3/TR8?
All 1N5343AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343AE3/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 1N5343AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5343AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5343AE3/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…
