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Microchip Technology 1N5348AE3/TR8
- Part No.:
- 1N5348AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348AE3/TR8.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,736
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Product details
Overview
1N5348AE3/TR8 from Microsemi is a 5 W axial-leaded Zener diode with nominal regulation voltage of 11 V, ±10% tolerance (A suffix), 2.5 Ω maximum dynamic impedance at 125 mA test current, and 8.0 A maximum surge current (8.3 ms half-sine). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5348AE3/TR8 datasheet, 1N5348AE3/TR8 pinout, 1N5348AE3/TR8 application, or 1N5348AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), steady-state power rating (5 W at TL < 25 °C), reverse leakage current (≤5.0 µA at 8.0 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (125 mA IZT to 8.0 A IZSM) and temperature ranges. Its low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length) enables high-current operation with minimal derating when mounted with adequate heat sinking.
The 1N5348AE3/TR8 exhibits 0.25 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and 430 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA - critical for low-noise reference stability under light-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal, ±10% tolerance - defines regulated output voltage window (9.9–12.1 V) under specified test conditions. |
| Test Current (IZT) | 125 mA dc - current at which VZ is measured; sets baseline operating point for regulation accuracy. |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - determines small-signal AC voltage variation under load transients. |
| Max Reverse Current (IR) | 5.0 µA max at VR = 8.0 V - quantifies leakage before breakdown; critical for low-power standby circuits. |
| Power Dissipation | 5.0 W at TL < 25 °C (3/8″ lead length) - defines maximum continuous DC power handling with proper thermal management. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design of heatsinking; 85 °C/W junction-to-ambient on FR4 board. |
| Surge Current (IZSM) | 8.0 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case (Void-free UL94V-0 epoxy), cathode indicated by band; leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node; reverse bias applied between cathode and anode. |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated voltage rail; maintains stable 11 V relative to anode under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard compliance ensures interoperability and reliability validation across supply chain. |
| ±10% voltage tolerance (A suffix) | Cost-optimized regulation accuracy suitable for non-critical reference and clamp applications. |
| RoHS-compliant e3 suffix | Meets global environmental directives; matte-tin plating ensures solderability and long-term shelf life. |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling, storage, and assembly logistics. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manufacturing and field service. |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated 12–15 V DC rails in industrial control modules where ±10% output tolerance is acceptable. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fixed 11 V reference to linear regulators or analog comparators. Use Value: Maintains stable bias point despite input ripple and load variation, enabling reliable comparator thresholding without active feedback. |
Use Scenario: Protecting 12 V microcontroller I/O pins against ESD and load-dump transients in automotive body electronics. IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursions to ≤12.1 V (VZ + ΔVZ) during 8.3 ms surges. Use Value: Absorbs up to 8.0 A surge current without degradation, preventing latch-up or gate oxide damage in downstream ICs. |
| Temperature-Stable Reference | Current-Limited Bias Source |
Use Scenario: Generating a stable 11 V reference for RTD or thermistor signal conditioning circuits operating from –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Zener-based voltage source feeding op-amp non-inverting input in ratiometric measurement topologies. Use Value: Low ΔVZ (0.25 V) and tight thermal resistance ensure <±0.5% drift over full temperature range when properly heatsunk. |
Use Scenario: Providing controlled base drive to PNP transistor switches in LED driver circuits requiring predictable turn-on thresholds. IC Role / Device Role / Timing Role: Series-connected Zener and resistor establishing ~11 V bias with inherent current limiting via dynamic impedance. Use Value: 2.5 Ω ZZ stabilizes current delivery across varying supply voltages, reducing transistor switching dispersion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | Same 11 V nominal VZ, but ±5% tolerance (B suffix); 2.5 Ω ZZ unchanged; identical package and thermal specs. | Higher regulation accuracy required in precision analog references or feedback loops where 10% tolerance introduces unacceptable error. | Select 1N5348B when tighter voltage control justifies cost premium; no PCB changes needed. |
| MMBZ5240BS-7-F | Surface-mount SOD-123 package; 10 V nominal VZ, ±5%; 150 mW power rating; 30 Ω typical ZZ at 20 mA. | Space-constrained PCBs where axial leads are incompatible; low-power biasing only - not suitable for 5 W dissipation or surge clamping. | Choose MMBZ5240BS-7-F for compact consumer designs with <100 mA load; verify thermal pad layout for 150 mW limits. |
Compared with 1N5348B, the 1N5348AE3/TR8 trades voltage accuracy for cost and robustness in high-energy clamping; versus MMBZ5240BS-7-F, it delivers 33× higher power handling and surge immunity but requires axial mounting and larger board area.
Availability
1N5348AE3/TR8 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection clamp, and temperature-stable reference applications requiring stable component supply, consistent RoHS compliance, and JEDEC-registered performance verification.
Supply support for 1N5348AE3/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 specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge survivability, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5348AE3/TR8?
The 1N5348AE3/TR8 has a nominal Zener voltage of 11 V with ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual VZ falls between 9.9 V and 12.1 V at 125 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance but does not affect voltage tolerance.
Can the 1N5348AE3/TR8 be used for surge protection in automotive applications?
Yes, the 1N5348AE3/TR8 supports 8.0 A peak surge current (IZSM) for an 8.3 ms half-sine waveform, making it suitable for load-dump and ISO 7637-2 pulse suppression in 12 V automotive subsystems. Its –65 °C to +150 °C operating range and MIL-STD-750 qualified construction further validate its use in under-hood environments.
What is the thermal resistance specification for the 1N5348AE3/TR8?
The 1N5348AE3/TR8 has a thermal resistance of 25 °C/W junction-to-lead at 10 mm (3/8″) lead length from the body. When mounted on a standard FR4 PCB (1 oz Cu, 4 mm² pads, 1 mm track width), junction-to-ambient thermal resistance rises to 85 °C/W - a critical parameter for calculating safe operating temperature rise at 5 W dissipation.
How does the 1N5348AE3/TR8 differ from the 1N5348BE3/TR8?
The 1N5348AE3/TR8 and 1N5348BE3/TR8 share identical package, power rating (5 W), surge capability (8.0 A), and dynamic impedance (2.5 Ω), but differ in voltage tolerance: "A" denotes ±10%, while "B" denotes ±5%. Both carry the RoHS-compliant e3 suffix and TR8 tape-and-reel packaging.
Is the 1N5348AE3/TR8 compatible with lead-free reflow soldering processes?
Yes, the 1N5348AE3/TR8 features RoHS-compliant matte-tin plating qualified per MIL-STD-750 Method 2026 and supports soldering at 260 °C for 10 seconds maximum - fully compatible with standard lead-free reflow profiles. Its UL94V-0 epoxy body withstands repeated thermal cycling without delamination.
1N5348AE3/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:
- ±10%
- 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
1N5348AE3/TR8 FAQ
1.How can I place an order for 1N5348AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348AE3/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 1N5348AE3/TR8 reliable?
The price and inventory of 1N5348AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348AE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5348AE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348AE3/TR8 transactions.
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4.How is shipping managed for 1N5348AE3/TR8?
1N5348AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348AE3/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 1N5348AE3/TR8?
For technical support, including 1N5348AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348AE3/TR8 requirements.
6.How does Aetrix verify that 1N5348AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5348AE3/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 1N5348AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5348AE3/TR8?
All 1N5348AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348AE3/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 1N5348AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5348AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348AE3/TR8 Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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