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Microchip Technology 1N5348AE3/TR12
- Part No.:
- 1N5348AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348AE3/TR12.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,267
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Product details
Overview
1N5348AE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±10% tolerance (A suffix), 125 mA maximum Zener current (IZM), 2.5 Ω dynamic impedance (ZZ), and 0.25 V voltage regulation (ΔVZ). 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/TR12 datasheet, 1N5348AE3/TR12 pinout, 1N5348AE3/TR12 application, or 1N5348AE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (8.0 A), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR12).
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current variation (125 mA IZM at TL < 25 °C). Its low dynamic impedance (2.5 Ω) and tight ΔVZ (0.25 V) ensure minimal voltage drift between 10% and 50% of IZM.
Designed for axial-lead mounting on FR4 PCBs or with heat sinking via 3/8″ lead length, it delivers 5 W steady-state power at lead temperature < 25 °C or 1.47 W at ambient 25 °C - reflecting its 85 °C/W junction-to-ambient thermal resistance under standard board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±10% - defines nominal regulation point; high-end VZM = 12.1 V sets max IZM calculation limit. |
| Test Current (IZT) | 125 mA - operating point where VZ and ZZ are specified; ensures stable regulation under typical bias. |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance enables tight voltage control during load transients. |
| Max Regulator Current (IZM) | 125 mA - maximum continuous DC current at TL < 25 °C; derates linearly above that temperature. |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity. |
| Surge Current (IZSM) | 8.0 A - peak non-recurrent half-sine (8.3 ms) rating; supports transient overvoltage clamping. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables high-power operation with simple lead heatsinking. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential; reverse bias applied to cathode for regulation. |
| Cathode | Zener regulation terminal | Banded end; connected to unregulated input; maintains 11 V relative to anode when reverse biased ≥ VZ. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-201AD mechanical and electrical definitions for interchangeability. |
| RoHS-compliant (e3) | Meets EU Directive 2011/65/EU; matte-tin plating replaces lead-based solderability finish. |
| Tape-and-reel packaging (TR12) | Standard EIA-296 compliant reel format for automated SMT placement compatibility despite axial form factor. |
| MIL-STD-750 ESD robustness | Nonsensitive to electrostatic discharge per Method 1020 - eliminates need for special handling in assembly. |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies storage and reduces BOM prep overhead. |
Applications
| DC Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 11 V reference against which output is compared. Use Value: Enables ±10% output regulation accuracy with low ΔVZ (0.25 V) minimizing error amplifier offset impact. | Use Scenario: Protecting downstream ICs from supply rail surges exceeding 12.1 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when input exceeds VZM. Use Value: Withstands 8.0 A surge (8.3 ms) while holding voltage ≤12.1 V - prevents latch-up or damage in 12 V systems. |
| Industrial Sensor Excitation | Programmable Current Source Bias |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in harsh environments. IC Role / Device Role / Timing Role: Precision voltage source maintaining constant bias across temperature (−65 °C to +150 °C). Use Value: Low thermal resistance (25 °C/W) and wide operating range ensure <±0.5% VZ drift over full industrial temp span. | Use Scenario: Setting reference voltage for op-amp-based constant-current circuits driving LEDs or lasers. IC Role / Device Role / Timing Role: Stable voltage node defining current-setting resistor voltage drop. Use Value: 2.5 Ω dynamic impedance ensures current stability within ±1% over 50–100 mA load variation. |
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 VZ (11 V), but ±5% tolerance (B suffix); higher IZM (1440 mA vs. 125 mA); same package. | Higher precision and power capability; requires more robust thermal design. | Select when tighter voltage tolerance and higher current headroom are needed without changing layout. |
| MMBZ5242B (SOT-23) | Surface-mount, 500 mW rating, 11 V ±5%, 10 mA IZT; not pin-compatible; smaller thermal mass. | Not suitable for 5 W dissipation; limited to low-power bias/reference roles. | Choose only for space-constrained, low-power designs where 1N5348AE3/TR12's power rating is excessive. |
Compared with 1N5348B and MMBZ5242B, the 1N5348AE3/TR12 offers mid-tier tolerance (±10%) and proven 5 W axial-leaded reliability for industrial power rails - balancing cost, precision, and thermal margin without requiring PCB redesign.
Availability
1N5348AE3/TR12 is available at Aetrix Electronics and suitable for DC power supply reference, overvoltage clamp, and industrial sensor excitation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5348AE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized, high-power voltage regulation in mission-critical power systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5348AE3/TR12?
The 1N5348AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its regulated voltage falls between 9.9 V and 12.1 V at the test current of 125 mA and lead temperature of 25 °C. The e3 suffix confirms RoHS compliance, and TR12 denotes tape-and-reel packaging per EIA-296.
How much power can the 1N5348AE3/TR12 dissipate continuously?
The 1N5348AE3/TR12 is rated for 5.0 W steady-state power dissipation at lead temperature (TL) below 25 °C with 3/8″ (10 mm) lead length from the body. When mounted on a standard FR4 PCB (1 oz Cu, 4 mm² pads), its usable power drops to 1.47 W at 25 °C ambient due to higher junction-to-ambient thermal resistance (85 °C/W).
What does the "TR12" suffix mean in 1N5348AE3/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12 mm tape width and component orientation optimized for automated pick-and-place equipment. This format supports high-volume manufacturing while preserving the axial-leaded T-18 mechanical form factor of the 1N5348AE3/TR12.
Is the 1N5348AE3/TR12 suitable for surge protection?
Yes - the 1N5348AE3/TR12 supports a maximum non-recurrent surge current (IZSM) of 8.0 A for an 8.3 ms half-sine waveform. Its low dynamic impedance (2.5 Ω) and stable 11 V regulation enable effective clamping of transient overvoltages in 12 V power rails without degradation, making it suitable for surge protection in industrial controls.
What is the thermal resistance specification for the 1N5348AE3/TR12?
The 1N5348AE3/TR12 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from the body. Under standard FR4 PCB mounting (1 oz Cu, 4 mm² copper pad), its junction-to-ambient thermal resistance is 85 °C/W - critical for calculating safe operating area and derating curves in thermal design.
1N5348AE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5348AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348AE3/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 1N5348AE3/TR12 reliable?
The price and inventory of 1N5348AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5348AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348AE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5348AE3/TR12?
1N5348AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348AE3/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 1N5348AE3/TR12?
For technical support, including 1N5348AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348AE3/TR12 requirements.
6.How does Aetrix verify that 1N5348AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5348AE3/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 1N5348AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5348AE3/TR12?
All 1N5348AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348AE3/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 1N5348AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5348AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348AE3/TR12 Tags
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