My Inquiry
My Account
Microchip Technology 1N5343CE3/TR8
- Part No.:
- 1N5343CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343CE3/TR8.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,772
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5343CE3/TR8 from Microsemi is a 5 W, 7.5 V ±2% tolerance axial-leaded silicon Zener diode designed for precision voltage regulation in power supply reference and overvoltage protection circuits. It delivers stable regulation at 175 mA test current, exhibits 1.5 Ω dynamic impedance, supports 630 mA maximum regulator current, and operates across –65°C to +150°C.
For engineers reviewing the 1N5343CE3/TR8 datasheet, 1N5343CE3/TR8 pinout, 1N5343CE3/TR8 application, or 1N5343CE3/TR8 equivalent, key selection factors include its ±2% tight tolerance (C suffix), RoHS-compliant e3 plating, tape-and-reel TR8 packaging, and verified performance under high-surge (10.7 A) and high-temperature conditions.
Technical Context
This device functions as a two-terminal shunt voltage regulator with cathode-banded polarity. Its Zener voltage is specified at 7.5 V ±2% under 175 mA DC test current at 25°C lead temperature, with dynamic impedance measured at 1.5 Ω using 1 kHz AC modulation superimposed on IZT.
Thermal design relies on junction-to-lead resistance of 25°C/W (at 10 mm lead length) and junction-to-ambient resistance of 85°C/W on FR4 board. Voltage regulation ΔVZ is defined as the difference between voltages measured at 10% and 50% of IZM (630 mA), yielding 0.15 V max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±2% - precise reference voltage at 175 mA, enabling stable feedback in linear regulators. |
| Power Dissipation | 5.0 W at TL = 25°C - requires adequate heat sinking beyond 25°C per derating curve (Figure 1). |
| Dynamic Impedance (ZZ) | 1.5 Ω - low impedance ensures minimal output voltage variation under load current changes. |
| Max Regulator Current (IZM) | 630 mA - maximum continuous DC current before thermal runaway when properly heat sunk. |
| Surge Current (IZSM) | 10.7 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage clamping. |
| Reverse Leakage (IR) | 10 μA max at VR = 5.4 V - low leakage preserves efficiency in high-impedance bias networks. |
| Operating Temperature | –65°C to +150°C - suitable for industrial and automotive under-hood environments. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by band. Leads are RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; reverse-biased operation requires cathode at higher potential. |
| Cathode | Regulated output node | Banded end; supplies stable 7.5 V reference when reverse-biased and current-limited externally. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener tolerance (C suffix) | Enables high-accuracy voltage references without post-calibration in analog power supplies. |
| RoHS-compliant e3 plating | Meets global environmental compliance requirements without sacrificing solderability or reliability. |
| Tape-and-reel TR8 packaging | Supports automated SMT placement despite axial form factor-ideal for hybrid assembly lines. |
| Level 1 moisture sensitivity | No dry pack required; simplifies handling and eliminates bake-out steps prior to assembly. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces risk of field failure during handling and board-level integration without added protection. |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Precision feedback network in isolated DC-DC converters requiring stable 7.5 V reference for error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference providing regulated bias point for TL431 or op-amp comparators. Use Value: ±2% tolerance and 1.5 Ω dynamic impedance ensure <±0.15 V output drift across 10–50% load range. |
Use Scenario: Transient voltage suppression on 5 V logic rails exposed to inductive switching noise. IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursions above 7.5 V during ESD or load dump events. Use Value: 10.7 A surge rating and 0.15 V regulation delta enable reliable clamping without thermal runaway. |
| Automotive Sensor Biasing | Test Equipment Calibration Reference |
Use Scenario: Stable excitation voltage source for resistive temperature sensors (RTDs) in engine control modules. IC Role / Device Role / Timing Role: Low-drift Zener reference replacing higher-cost voltage references in wide-temperature environments. Use Value: Operation from –65°C to +150°C and <10 μA leakage at 5.4 V maintain sensor accuracy across full automotive range. |
Use Scenario: Factory-trimmed reference node in portable multimeters and benchtop power analyzers. IC Role / Device Role / Timing Role: Primary voltage standard for self-calibration routines and ADC offset correction. Use Value: Tight ±2% initial tolerance and minimal ΔVZ (0.15 V) reduce calibration frequency and improve long-term measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Same 7.5 V nominal, but ±5% tolerance (B suffix) and no e3 RoHS marking. | Acceptable where tighter tolerance not required; lacks RoHS compliance documentation traceability. | Select when cost sensitivity outweighs precision and environmental compliance needs. |
| MMSZ5231BT1G | Surface-mount SOD-123 package, 500 mW rating, ±5% tolerance, 7.5 V nominal. | Not drop-in replaceable-requires PCB redesign; limited to low-power biasing, not 5 W regulation. | Choose only for space-constrained, low-current designs where thermal mass and surge capability are secondary. |
Compared with 1N5343B and MMSZ5231BT1G, the 1N5343CE3/TR8 uniquely combines ±2% tolerance, 5 W power handling, axial through-hole mounting, RoHS compliance, and tape-and-reel automation support-making it optimal for high-reliability industrial power references where precision, robustness, and manufacturability intersect.
Availability
1N5343CE3/TR8 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and automotive sensor biasing applications requiring stable component supply, long lifecycle continuity, and RoHS-compliant sourcing.
Supply support for 1N5343CE3/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 engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and long-term parametric consistency under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5343CE3/TR8?
The 1N5343CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its nominal 7.5 V Zener voltage is guaranteed between 7.35 V and 7.65 V when tested at 175 mA DC current and 25°C lead temperature, per Microsemi's REV D specification sheet.
Does the 1N5343CE3/TR8 require dry packing before reflow soldering?
No, the 1N5343CE3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to soldering. Its void-free thermosetting epoxy body inherently resists moisture absorption, simplifying manufacturing logistics.
What is the maximum steady-state power dissipation for the 1N5343CE3/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5343CE3/TR8 is rated for 1.47 W steady-state power dissipation at 25°C ambient. Derating is required above 25°C per Figure 1 in the datasheet, with thermal resistance of 85°C/W junction-to-ambient under those conditions.
Can the 1N5343CE3/TR8 be used as a direct replacement for the 1N5343B?
The 1N5343CE3/TR8 can functionally replace the 1N5343B in most circuits, but differences exist: it adds ±2% tolerance (vs. ±5% for B suffix), RoHS-compliant e3 plating, and TR8 tape-and-reel packaging. Electrical performance is otherwise identical, though layout must accommodate axial leads and mechanical dimensions remain unchanged.
What is the surge current rating of the 1N5343CE3/TR8 and how is it defined?
The 1N5343CE3/TR8 has a maximum non-repetitive surge current (IZSM) rating of 10.7 A. This is defined as the peak value of a single 8.3 ms half-sine waveform applied in reverse bias, per JEDEC standard test conditions, and reflects its capability to absorb transient energy without failure.
1N5343CE3/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:
- ±2%
- 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
1N5343CE3/TR8 FAQ
1.How can I place an order for 1N5343CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343CE3/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 1N5343CE3/TR8 reliable?
The price and inventory of 1N5343CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5343CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5343CE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5343CE3/TR8?
1N5343CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5343CE3/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 1N5343CE3/TR8?
For technical support, including 1N5343CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343CE3/TR8 requirements.
6.How does Aetrix verify that 1N5343CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5343CE3/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 1N5343CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5343CE3/TR8?
All 1N5343CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343CE3/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 1N5343CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5343CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5343CE3/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…
