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Microchip Technology 1N4748CE3/TR13
- Part No.:
- 1N4748CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748CE3/TR13.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,288
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Product details
Overview
1N4748CE3/TR13 from Microsemi is a 22 V, 1 W silicon Zener diode in DO-41 plastic package with ±2% voltage tolerance (C suffix), 11.5 mA test current (IZT), 23 Ω dynamic impedance (ZZT), and rated for -65°C to +150°C operation. It provides precise voltage regulation in power supply reference, overvoltage protection, and analog signal conditioning circuits.
For engineers reviewing the 1N4748CE3/TR13 datasheet, 1N4748CE3/TR13 pinout, 1N4748CE3/TR13 application, or 1N4748CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45°C/W junction-to-lead), surge current rating (205 mA), reverse leakage (<5 µA at 16.7 V), and RoHS-compliant matte-tin plating.
Technical Context
This Zener operates in reverse breakdown mode with sharp knee characteristics verified per MicroNote 202, using 10% AC superimposition on DC test current to measure dynamic impedance. Its 22 V nominal Zener voltage exhibits a positive temperature coefficient above 5.6 V, typical for this family.
The device uses void-free UL94V-0 epoxy encapsulation with axial leads, cathode band polarity marking, and is moisture-sensitive Level 1 per J-STD-020B-no dry pack required. Thermal performance is specified at 3/8" lead length (45°C/W) and on FR4 board (105°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±2% at 11.5 mA - ensures stable reference within tight tolerance across production lots |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous regulation without derating below 105°C lead temperature |
| Dynamic Impedance (ZZT) | 23 Ω at IZT = 11.5 mA - low AC impedance maintains regulation stability under varying load currents |
| Reverse Leakage (IR) | <5 µA at VR = 16.7 V - minimal off-state current preserves efficiency in standby or high-impedance bias networks |
| Surge Current (ISM) | 205 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
| Thermal Resistance | 45°C/W junction-to-lead (3/8" lead length) - enables accurate thermal design for PCB trace heat sinking |
| Operating Temperature | -65°C to +150°C - qualified for industrial, automotive under-hood, and aerospace environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable 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 during Zener operation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated voltage node; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables precision reference generation without post-calibration in analog sensor interfaces |
| RoHS-compliant "e3" suffix | Meets global environmental compliance requirements without sacrificing electrical performance |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD workstations |
| Plastic P-suffix construction | Delivers lower thermal resistance than glass-body equivalents, improving power handling reliability |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or switching converter error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing fixed 22 V reference point for error comparator input. Use Value: Tight ±2% tolerance ensures output voltage accuracy remains within ±1% over line/load/temperature in 5 V–24 V systems. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient voltage spikes. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground when voltage exceeds 22 V. Use Value: 205 mA surge rating absorbs 100 V/1 µs transients without failure, preserving downstream logic integrity. |
| Analog Signal Conditioning | Current Source Biasing |
Use Scenario: Establishing stable bias points in op-amp gain-setting networks or sensor excitation circuits. IC Role / Device Role / Timing Role: Precision voltage reference defining operating point for instrumentation amplifier stages. Use Value: 23 Ω dynamic impedance minimizes regulation error under 1–5 mA signal-dependent current variations. | Use Scenario: Setting constant current through LEDs or photodiodes via series resistor + Zener configuration. IC Role / Device Role / Timing Role: Voltage reference enabling predictable current calculation (I = (VCC − 22 V)/R). Use Value: Stable 22 V reference ensures ±2% current accuracy across -40°C to +85°C ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4748A | Same 22 V, 1 W, DO-41, but ±5% tolerance (A suffix) and non-RoHS Sn/Pb plating | Acceptable where tighter tolerance not required and legacy Pb-based assembly used | Select 1N4748CE3/TR13 when RoHS compliance and ±2% regulation accuracy are mandatory |
| MMSZ4702ET1G | Surface-mount SOD-123, 22 V, ±5%, 500 mW, 30 Ω ZZT - lower power, smaller footprint | Used in space-constrained PCBs where axial leads are incompatible with layout or automated placement | Choose MMSZ4702ET1G only if board area is critical and 500 mW dissipation suffices |
Compared with 1N4748A and MMSZ4702ET1G, the 1N4748CE3/TR13 uniquely combines RoHS compliance, ±2% tolerance, and full 1 W power handling in axial DO-41 form-making it optimal for industrial power supplies requiring long-term calibration stability and environmental compliance.
Availability
1N4748CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1N4748CE3/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 components for aerospace, defense, and industrial markets.
The 1N47xxA series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems-emphasizing thermal resilience, ESD immunity, and JEDEC-standardized performance.
FAQ
What is the Zener voltage tolerance of the 1N4748CE3/TR13?
The 1N4748CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its measured breakdown voltage at 11.5 mA test current falls between 21.56 V and 22.44 V at 25°C lead temperature. This tighter tolerance supports precision reference applications where standard ±5% devices would introduce unacceptable error.
Does the 1N4748CE3/TR13 require dry packing before PCB assembly?
No, the 1N4748CE3/TR13 does not require dry packing. It is classified as moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking or humidity-controlled packaging. This simplifies inventory handling and eliminates floor-life tracking for surface mount or through-hole assembly lines.
What is the maximum surge current rating for the 1N4748CE3/TR13?
The 1N4748CE3/TR13 has a maximum surge current (ISM) rating of 205 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating reflects its ability to absorb short-duration overvoltage transients-such as ESD or inductive kickback-without permanent parametric shift or failure, supporting reliable clamp function in protection circuits.
How does the thermal resistance of the 1N4748CE3/TR13 affect PCB layout?
The 1N4748CE3/TR13 has a junction-to-lead thermal resistance of 45°C/W at 3/8" (10 mm) lead length, meaning each watt of dissipated power raises junction temperature 45°C above lead temperature. For reliable 1 W operation, PCB traces connected to its leads should provide adequate copper area and thermal relief; mounting on FR4 with 4 mm² pads yields 105°C/W junction-to-ambient, requiring ambient derating above 45°C.
Is the 1N4748CE3/TR13 compatible with lead-free reflow processes?
Yes, the 1N4748CE3/TR13 features RoHS-compliant annealed matte-tin plating and is rated for solder temperatures up to 260°C for 10 seconds-fully compatible with standard lead-free reflow profiles. Its UL94V-0 epoxy body withstands repeated thermal cycling without cracking or delamination, ensuring process robustness in high-volume manufacturing.
1N4748CE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 16.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4748CE3/TR13 FAQ
1.How can I place an order for 1N4748CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748CE3/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 1N4748CE3/TR13 reliable?
The price and inventory of 1N4748CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4748CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4748CE3/TR13?
1N4748CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748CE3/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 1N4748CE3/TR13?
For technical support, including 1N4748CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748CE3/TR13 requirements.
6.How does Aetrix verify that 1N4748CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4748CE3/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 1N4748CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4748CE3/TR13?
All 1N4748CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748CE3/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 1N4748CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N4748CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748CE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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