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Microchip Technology 1N4748CPE3/TR12
- Part No.:
- 1N4748CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748CPE3/TR12.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,659
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Product details
Overview
1N4748CPE3/TR12 from Microsemi is a 22 V, 2% tolerance, 1 W axial-lead Zener diode in DO-41 plastic package, rated for 11.5 mA test current, 23 Ω dynamic impedance at IZT, and 5 μA reverse leakage at 16.7 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4748CPE3/TR12 datasheet, 1N4748CPE3/TR12 pinout, 1N4748CPE3/TR12 application, or 1N4748CPE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), surge current rating (205 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This device operates in reverse breakdown to maintain stable 22 V output across 1–205 mA operating current range, with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its 2% voltage tolerance (C suffix) and low 23 Ω dynamic impedance at 11.5 mA ensure high regulation accuracy under varying load conditions.
Designed for through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 1.0 W steady-state power at lead temperature <105 °C (3/8″ from body) or ambient <45 °C, with thermal resistance of 105 °C/W junction-to-ambient under defined pad layout (4 mm² copper, 1 mm trace width).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±2% at 11.5 mA - ensures tight regulation for reference circuits requiring stable bias points |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation in compact power supplies without forced cooling |
| Dynamic Impedance (ZZT) | 23 Ω @ 11.5 mA - minimizes output voltage variation under load transients |
| Reverse Leakage Current | 5 μA @ 16.7 V - guarantees low quiescent current in standby-mode protection circuits |
| Surge Current (ISM) | 205 mA (½-sine, 1/120 s) - withstands short-duration overvoltage events without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - enables reliable heat transfer through axial leads in standard mounting |
| Forward Voltage | 1.2 V max @ 200 mA - defines forward conduction behavior during fault conditions or polarity reversal |
Pinout & Package
DO-41 (DO-204AL) plastic package with axial leads; cathode indicated by band; RoHS-compliant matte-tin plating; weight 0.7 g; moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to lower-potential node; conducts forward current when biased positive relative to cathode |
| Cathode | Banded lead | Connected to higher-potential node; operates in reverse breakdown to regulate voltage at 22 V |
Key Features
| Feature | Design Value |
|---|---|
| 2% Zener voltage tolerance (C suffix) | Enables use in precision references where ±0.44 V deviation is acceptable at 22 V nominal |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating, solderable per MIL-STD-750 Method 2026 |
| Tape-and-reel packaging (TR12) | Supports automated SMT placement despite axial form factor via carrier tape compatible with EIA-296 standards |
| JEDEC-registered 1N47xxAP series | Guarantees mechanical and electrical interchangeability with legacy 1N4748A designs using plastic encapsulation |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special handling in assembly environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 22 V reference point for error amplifier input. Use Value: Maintains ±2% output voltage accuracy across -65 °C to +150 °C operating range with 23 Ω dynamic impedance limiting load-induced drift. | Use Scenario: Protecting downstream circuitry from transient overvoltage spikes on DC rails. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 22 V to divert excess current to ground. Use Value: Absorbs 205 mA surge pulses without failure, limiting rail voltage to ≤22.44 V (22 V + 2%) during transients. |
| Signal Level Translation | Current Source Bias |
Use Scenario: Generating stable bias voltages for op-amp input stages or comparator thresholds. IC Role / Device Role / Timing Role: Precision voltage source establishing known DC offset in analog signal chains. Use Value: Delivers 22 V with 5 μA leakage at 16.7 V, minimizing loading on high-impedance sensor interfaces. | Use Scenario: Setting constant current in LED driver or transistor bias networks via series resistor. IC Role / Device Role / Timing Role: Voltage-regulating element defining emitter/base voltage drop in current mirror configurations. Use Value: Provides predictable 22 V reference enabling accurate current setting within ±2% across temperature and line variations. |
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 nominal, but ±5% tolerance (A suffix) and non-RoHS tin-lead plating | Suitable for legacy industrial designs not requiring RoHS compliance or tighter regulation | Select when cost sensitivity outweighs precision and environmental requirements |
| MMSZ4702T1G | Surface-mount SOD-123 package, same 22 V ±5%, 500 mW rating, 30 Ω ZZT | Used in space-constrained PCBs where axial DO-41 footprint is prohibitive | Select when board area is limited and 500 mW power rating suffices |
Compared with 1N4748A and MMSZ4702T1G, the 1N4748CPE3/TR12 offers superior voltage accuracy (±2% vs ±5%), full 1 W power handling, and RoHS compliance - making it optimal for new designs demanding precision, reliability, and regulatory alignment.
Availability
1N4748CPE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and signal level translation applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for 1N4748CPE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was developed to deliver JEDEC-standardized, plastic-encapsulated voltage regulation with enhanced thermal performance and military-grade screening options for mission-critical power systems.
FAQ
What is the Zener voltage tolerance of the 1N4748CPE3/TR12?
The 1N4748CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage remains within 21.56 V to 22.44 V at 11.5 mA test current and 25 °C lead temperature, supporting precision reference applications where tighter regulation than standard ±5% devices is required.
Does the 1N4748CPE3/TR12 meet RoHS requirements?
Yes, the 1N4748CPE3/TR12 meets RoHS Directive 2011/65/EU compliance, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating. Its termination is solderable per MIL-STD-750 Method 2026, and it requires no dry pack due to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity classification.
What is the maximum surge current rating for the 1N4748CPE3/TR12?
The 1N4748CPE3/TR12 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 enables reliable clamping of short-duration overvoltage transients without permanent parameter shift or failure.
How does the thermal resistance of the 1N4748CPE3/TR12 affect PCB layout?
The 1N4748CPE3/TR12 has a junction-to-lead thermal resistance of 45 °C/W, meaning efficient heat transfer relies on adequate lead length (3/8″ from body) and copper mass. For FR4 boards, its junction-to-ambient resistance is 105 °C/W with specified 4 mm² pads and 1 mm trace width - guiding minimum copper area requirements to sustain 1 W dissipation.
What does the "TR12" suffix indicate in 1N4748CPE3/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12 mm tape width. This format supports automated pick-and-place assembly while maintaining the DO-41 axial-lead mechanical configuration - enabling high-volume manufacturing without manual handling or reel conversion.
1N4748CPE3/TR12 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)
1N4748CPE3/TR12 FAQ
1.How can I place an order for 1N4748CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748CPE3/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 1N4748CPE3/TR12 reliable?
The price and inventory of 1N4748CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4748CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748CPE3/TR12 transactions.
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4.How is shipping managed for 1N4748CPE3/TR12?
1N4748CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748CPE3/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 1N4748CPE3/TR12?
For technical support, including 1N4748CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4748CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4748CPE3/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 1N4748CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4748CPE3/TR12?
All 1N4748CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748CPE3/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 1N4748CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4748CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748CPE3/TR12 Tags
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MMBZ5240B-7-F
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Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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