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Microchip Technology 1N5348E3/TR13
- Part No.:
- 1N5348E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348E3/TR13.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,129
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Product details
Overview
1N5348E3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±5% tolerance (B-suffix equivalent), 125 mA maximum Zener current (IZM), 2.5 Ω dynamic impedance (ZZ), and 0.25 V voltage regulation (ΔVZ) - used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5348E3/TR13 datasheet, 1N5348E3/TR13 pinout, 1N5348E3/TR13 application, or 1N5348E3/TR13 equivalent, key selection criteria include Zener voltage stability under varying load/temperature, thermal resistance (25 °C/W junction-to-lead), surge current rating (8.0 A), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR13).
Technical Context
This device operates as a reverse-biased voltage regulator with fixed breakdown at 11 V under 125 mA test current (IZT). Its low dynamic impedance (2.5 Ω) ensures minimal voltage deviation across operating current range, while thermal resistance of 25 °C/W (junction-to-lead, 10 mm lead length) supports stable regulation up to 150 °C ambient when adequately heat-sunk.
It features a void-free thermosetting epoxy T-18 package with cathode band marking, tin-lead or RoHS-compliant matte-tin plating, and meets MIL-STD-750 ESD immunity (Method 1020). The e3 suffix confirms RoHS compliance; TR13 denotes EIA-296 tape-and-reel packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal at 125 mA - defines precise regulation point for feedback loops and reference circuits. |
| Tolerance | ±5% - matches B-suffix specification; ensures VZ stays within 10.45–11.55 V at 25 °C. |
| Max Power Dissipation | 5.0 W at TL = 25 °C - requires thermal management beyond 25 °C per derating curve (25 °C/W). |
| Dynamic Impedance (ZZ) | 2.5 Ω - limits voltage shift to ≤0.31 V across 125 mA IZM variation (ΔV = ZZ × ΔI). |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM, indicating tight knee behavior. |
| Surge Current (IZSM) | 8.0 A (8.3 ms half-sine) - withstands transient overloads without degradation. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable junction temperature rise with known lead temperature. |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case per JEDEC DO-204AL; moisture sensitivity level 1 (no dry pack required); cathode indicated by band; weight 0.7 g.
| 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 to cathode for regulation. |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to regulated rail; maintains 11 V relative to anode under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical/mechanical specs across 1N5333B–1N5388B series for cross-vendor compatibility. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU; uses matte-tin plating instead of lead-based terminations. |
| Low dynamic impedance (2.5 Ω) | Minimizes output voltage drift under load transients - critical for analog reference stability. |
| High surge current rating (8.0 A) | Protects downstream circuitry during short-duration overvoltage events without failure. |
| Level 1 moisture sensitivity | Eliminates pre-bake requirement before PCB assembly - reduces manufacturing cost and cycle time. |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing fixed 11 V reference to op-amp or PWM controller input. Use Value: Maintains ±0.25 V regulation across 12.5–62.5 mA load current, enabling <1% output voltage error. | Use Scenario: Clamping transient spikes on 12 V automotive or industrial control bus lines. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when line voltage exceeds 11.55 V. Use Value: Withstands 8.0 A surge (8.3 ms) without parametric shift - prevents latch-up or damage to MCU I/O. |
| DC-DC Converter Feedback Divider | Temperature-Stable Reference Source |
Use Scenario: Setting output voltage in isolated flyback or forward converters via resistive divider. IC Role / Device Role / Timing Role: Precision 11 V node referenced against secondary-side optocoupler feedback path. Use Value: Low ΔVZ (0.25 V) and 25 °C/W thermal resistance ensure <0.5% output drift from –40 °C to +105 °C. | Use Scenario: Providing stable bias for analog sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing higher-cost IC references. Use Value: 2.5 Ω ZZ and ±5% tolerance enable 10 ppm/°C effective TC when combined with matched resistor networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | Same 11 V, ±5%, 5 W rating but non-RoHS (tin-lead plating); no e3 or TR suffix. | Not suitable for RoHS-compliant production; requires leaded solder process. | Select 1N5348B only for legacy repair or non-RoHS environments. |
| MMSZ5242B-TP | Surface-mount SOD-123 package; 12 V nominal, ±5%; 500 mW power rating. | Limited to low-power applications; cannot replace 5 W dissipation without parallel devices. | Choose MMSZ5242B-TP only for space-constrained PCBs where thermal design supports <0.5 W operation. |
Compared with 1N5348B and MMSZ5242B-TP, the 1N5348E3/TR13 uniquely combines RoHS compliance, axial-leaded through-hole mounting, full 5 W dissipation capability, and tape-and-reel automation readiness - making it optimal for high-reliability industrial power supply assembly.
Availability
1N5348E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5348E3/TR13 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 for robust voltage regulation in harsh-environment power systems - emphasizing thermal resilience, surge immunity, and long-term parametric stability over wide temperature ranges.
FAQ
What is the Zener voltage tolerance of the 1N5348E3/TR13?
The 1N5348E3/TR13 has a ±5% Zener voltage tolerance, consistent with the B-suffix designation in the 1N5333B–1N5388B family. This means its measured VZ at 25 °C and 125 mA falls between 10.45 V and 11.55 V. The e3 suffix does not affect tolerance - it only indicates RoHS compliance. This tolerance is verified per JEDEC test conditions using 40 ±10 ms DC current pulses.
Does the 1N5348E3/TR13 require dry packing before PCB assembly?
No, the 1N5348E3/TR13 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, confirmed in the official Microsemi datasheet. This classification permits indefinite floor life at ≤30 °C/60% RH without baking - simplifying SMT handling and reducing assembly cost versus higher-level MSL components.
What is the maximum steady-state power dissipation for the 1N5348E3/TR13 on a standard FR4 board?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5348E3/TR13 delivers 1.47 W steady-state power at TA = 25 °C. This value derives from its 85 °C/W junction-to-ambient thermal resistance. Exceeding this without additional heatsinking risks junction temperature exceeding 150 °C - the absolute maximum rated storage/operating temperature.
How is the voltage regulation (ΔVZ) of 0.25 V measured for the 1N5348E3/TR13?
The voltage regulation (ΔVZ) of 0.25 V for the 1N5348E3/TR13 is defined as the difference between Zener voltage measured at 10% and 50% of its maximum Zener current (IZM = 125 mA), i.e., between 12.5 mA and 62.5 mA. This metric quantifies knee sharpness and is measured per JEDEC standard at TL = 25 °C with 40 ±10 ms DC pulses - not AC or small-signal conditions.
Can the 1N5348E3/TR13 be used as a direct replacement for the 1N5348B in existing designs?
Yes, the 1N5348E3/TR13 is electrically and mechanically identical to the 1N5348B except for RoHS compliance (e3 suffix) and tape-and-reel packaging (TR13). Both share identical VZ (11 V), tolerance (±5%), IZM (125 mA), ZZ (2.5 Ω), and T-18 package dimensions. No PCB layout or thermal redesign is needed - only solder process adjustment for lead-free reflow profiles.
1N5348E3/TR13 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:
- ±20%
- 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
1N5348E3/TR13 FAQ
1.How can I place an order for 1N5348E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348E3/TR13 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 1N5348E3/TR13 reliable?
The price and inventory of 1N5348E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5348E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5348E3/TR13?
1N5348E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348E3/TR13 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 1N5348E3/TR13?
For technical support, including 1N5348E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348E3/TR13 requirements.
6.How does Aetrix verify that 1N5348E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5348E3/TR13 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 1N5348E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5348E3/TR13?
All 1N5348E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348E3/TR13, 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 1N5348E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5348E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348E3/TR13 Tags
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