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Microchip Technology 1N5343AE3/TR12
- Part No.:
- 1N5343AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343AE3/TR12.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,528
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Product details
Overview
1N5343AE3/TR12 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), 1.5 Ω maximum dynamic impedance (ZZ), and 630 mA maximum Zener current (IZM) at 25°C. It operates from −65°C to +150°C and is used for voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5343AE3/TR12 datasheet, 1N5343AE3/TR12 pinout, 1N5343AE3/TR12 application, or 1N5343AE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (10.7 A), 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. Its Zener voltage is specified at 7.5 V ±10% under 175 mA dc test current, with low dynamic impedance (≤1.5 Ω) ensuring stable regulation across load variations. Voltage regulation (ΔVZ) is ≤0.15 V between 10% and 50% of IZM.
It features a T-18 axial package with cathode band marking, void-free UL94V-0 epoxy body, and lead termination compatible with 260 °C/10 s soldering. Thermal resistance is 25 °C/W junction-to-lead at 10 mm lead length, enabling 5 W dissipation at TL = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±10% - defines regulated output voltage under nominal bias; usable in 5–9 V supply rail stabilization |
| Test Current (IZT) | 175 mA - establishes baseline operating point for VZ specification and impedance measurement |
| Dynamic Impedance (ZZ) | 1.5 Ω max - ensures minimal voltage shift (<0.26 V) for ±175 mA current variation around IZT |
| Max Zener Current (IZM) | 630 mA - sets absolute DC current limit for safe 5 W operation with adequate heatsinking |
| Surge Current (IZSM) | 10.7 A - supports transient overvoltage clamping during 8.3 ms half-sine surges |
| Junction-to-Lead Rθ | 25 °C/W - enables full 5 W power dissipation when leads are held at ≤25 °C (e.g., chassis-mounted) |
| Operating Temp Range | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
T-18 axial-leaded plastic package (void-free UL94V-0 epoxy); cathode identified by single black band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026; weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / regulation reference | Banded end; must be biased positive relative to anode to enter regulation; serves as stable voltage reference node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions for interchangeability |
| RoHS-compliant (e3) | Meets EU Directive 2011/65/EU; matte-tin plating eliminates lead-based solder compatibility concerns |
| Level 1 moisture sensitivity | No dry-pack required; supports standard SMT reflow and manual assembly without baking |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020-reduces handling precautions in production |
| High surge current capability | 10.7 A peak (8.3 ms half-sine) enables robust transient suppression without external TVS staging |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 12 V DC input to generate a clean 7.5 V reference for analog sensor biasing in industrial PLC modules. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 7.5 V node against which op-amp feedback networks are referenced. Use Value: Maintains <±0.15 V regulation across 100–500 mA load current due to low ZZ (1.5 Ω) and high IZM (630 mA). | Use Scenario: Clamping induced transients on a 9 V battery-backed microcontroller reset line exposed to EMI in automotive body control units. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 7.5 V to ground before reaching sensitive logic inputs. Use Value: Absorbs 10.7 A surge (8.3 ms) without failure, preventing latch-up or damage to downstream CMOS inputs. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Setting precise threshold voltages in comparator circuits for battery charge-state monitoring in portable medical devices. IC Role / Device Role / Timing Role: Primary reference source defining trip points for analog comparators in low-power battery management ICs. Use Value: Delivers ±10% initial accuracy and <0.15 V regulation drift over 10–500 mA, enabling repeatable 1% state-of-charge detection. | Use Scenario: Establishing stable quiescent current in Class-A audio amplifier output stages operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-compensated bias generator maintaining constant emitter current despite VBE drift. Use Value: Operates reliably from −65°C to +150°C with minimal VZ drift, supporting consistent amplifier bias over full industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Same 7.5 V nominal VZ but ±5% tolerance (B suffix) vs. ±10% (A suffix); identical package, IZT, ZZ, IZM | Higher precision required where tighter voltage stability is critical (e.g., calibration references) | Select 1N5343B when ±5% tolerance is mandatory; otherwise 1N5343AE3/TR12 offers cost-effective general-purpose regulation |
| MMBZ5227BS | SOT-23 surface-mount package; 300 mW rating; 7.5 V ±5%; 10 mA IZT; 17 Ω ZZ - not a power-equivalent replacement | Low-power, space-constrained PCBs where 5 W dissipation is unnecessary | Choose MMBZ5227BS only for signal-level referencing; avoid for power regulation or surge handling |
Compared with 1N5343B and MMBZ5227BS, the 1N5343AE3/TR12 uniquely balances 5 W power handling, axial through-hole mounting, ±10% tolerance, and RoHS compliance-making it optimal for industrial power supply and protection designs requiring robustness and ease of manual assembly.
Availability
1N5343AE3/TR12 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply and long-term obsolescence support.
Supply support for 1N5343AE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zener diodes for general-purpose voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the Zener voltage tolerance of the 1N5343AE3/TR12?
The 1N5343AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. Its nominal Zener voltage is 7.5 V, meaning the actual measured VZ falls between 6.75 V and 8.25 V at 175 mA test current and 25°C lead temperature. This tolerance is confirmed in the Electrical Characteristics table on page 1 of the Microsemi datasheet.
Does the 1N5343AE3/TR12 require dry packing for moisture sensitivity?
No, the 1N5343AE3/TR12 does not require dry packing. It carries IPC/JEDEC J-STD-020B Level 1 moisture sensitivity classification, meaning it can be stored and assembled without baking or humidity-controlled packaging. This is explicitly stated in the Features section of the Microsemi datasheet under "Moisture classification is Level 1… with no dry pack required."
What is the maximum surge current rating for the 1N5343AE3/TR12?
The 1N5343AE3/TR12 has a maximum non-recurrent surge current (IZSM) rating of 10.7 A, defined as the peak value of an 8.3 ms half-sine waveform. This value is listed in the Electrical Characteristics table for type number 1N5343B (which shares identical ratings with 1N5343AE3/TR12 except for tolerance), and applies under specified thermal conditions per Microsemi's test methodology.
Is the 1N5343AE3/TR12 RoHS compliant?
Yes, the 1N5343AE3/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its part number and the "RoHS Compliant devices available by adding e3 suffix" statement in the Features section. Its leads are plated with annealed matte-tin per MIL-STD-750, satisfying EU Directive 2011/65/EU requirements without lead content.
What is the thermal resistance junction-to-lead for the 1N5343AE3/TR12?
The thermal resistance junction-to-lead (RθJL) for the 1N5343AE3/TR12 is 25 °C/W, measured at 3/8 inch (10 mm) lead length from the body. This value enables full 5 W power dissipation when the leads are maintained at ≤25°C, and is documented in the Maximum Ratings section of the Microsemi datasheet under "Thermal Resistance."
1N5343AE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5343AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343AE3/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 1N5343AE3/TR12 reliable?
The price and inventory of 1N5343AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5343AE3/TR12?
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1N5343AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5343AE3/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 1N5343AE3/TR12?
For technical support, including 1N5343AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343AE3/TR12 requirements.
6.How does Aetrix verify that 1N5343AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5343AE3/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 1N5343AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5343AE3/TR12?
All 1N5343AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343AE3/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 1N5343AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5343AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5343AE3/TR12 Tags
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BZT52C5V6T-7
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