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Microchip Technology 1N4748APE3/TR12
- Part No.:
- 1N4748APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748APE3/TR12.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,380
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Product details
Overview
1N4748APE3/TR12 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal zener voltage 22 V ±5%, 11.5 mA test current (IZT), 23 Ω dynamic impedance (ZZT), and maximum reverse current 5 μA at 16.7 V. It regulates voltage in power supply reference, overvoltage protection, and voltage-clamping circuits across industrial temperature range.
For engineers reviewing the 1N4748APE3/TR12 datasheet, 1N4748APE3/TR12 pinout, 1N4748APE3/TR12 application, or 1N4748APE3/TR12 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (205 mA), RoHS-compliant matte-tin plating, and DO-41 package compatibility with manual and wave soldering.
Technical Context
This Zener operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 22 V nominal regulation is specified at 11.5 mA IZT with 23 Ω dynamic impedance, and it exhibits a positive temperature coefficient above ~5 V, confirmed by Figure 3 in the datasheet.
The device uses a void-free thermosetting epoxy case (UL94V-0 rated) with cathode band polarity marking, tin-lead or RoHS-compliant matte-tin terminals, and is moisture-sensitive Level 1 per J-STD-020B-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 22 V ±5% at 11.5 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous thermal load on PCB traces |
| Dynamic Impedance | 23 Ω at IZT - determines output voltage variation under load current changes |
| Reverse Leakage | 5 μA max at 16.7 V - ensures low quiescent current in standby regulation circuits |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Surge Current | 205 mA (½-sine, 1/120 s) - supports transient overvoltage suppression without failure |
| Operating Temp | –65°C to +150°C - suitable for automotive under-hood and industrial control environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored 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 | Non-banded end | Connected to lower-potential node during Zener operation; forward voltage ≤1.2 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node; reverse-biased to achieve 22 V regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with 1N47xxA series standards for interchangeability and testing |
| RoHS-compliant "e3" suffix | Matte-tin terminal plating meeting EU RoHS Directive 2011/65/EU requirements |
| Moisture Sensitivity Level 1 | No dry pack or baking required before assembly - reduces manufacturing overhead |
| Low thermal resistance | 45 °C/W junction-to-lead enables effective heat conduction through leads without heatsink |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling needed in standard assembly |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 22 V reference in linear regulator feedback networks or ADC reference dividers. IC Role / Device Role / Timing Role: Voltage reference element providing precision bias point independent of input ripple. Use Value: 5% tolerance and 23 Ω dynamic impedance ensure <±0.2 V drift under 10 mA load variation. | Use Scenario: Clamping transient spikes on 24 V DC rails in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when voltage exceeds 22 V. Use Value: 205 mA surge rating handles repetitive 100 V/100 ns transients without degradation. |
| Voltage-Level Translation | Signal Conditioning Clamp |
Use Scenario: Biasing op-amp inputs to 22 V rail in high-side sensing circuits. IC Role / Device Role / Timing Role: Fixed-voltage clamp establishing common-mode level for differential amplifiers. Use Value: Low 5 μA leakage at 16.7 V minimizes error current in precision analog front-ends. | Use Scenario: Limiting analog sensor output swing to protect downstream ADC inputs. IC Role / Device Role / Timing Role: Signal amplitude limiter preventing saturation or damage to 3.3 V or 5 V logic interfaces. Use Value: Sharp knee impedance (41 Ω at IZK = 0.25 mA) ensures clean clipping onset near 22 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4748A-T | No "e3" RoHS suffix; Sn/Pb plating; same DO-41 package and electrical specs | Not suitable for lead-free assembly; requires Pb-based solder process | Select 1N4748A-T only if legacy Sn/Pb process is mandated and RoHS compliance is not required |
| MMSZ4702T1G | Surface-mount SOD-123 package; 22 V ±5%; 500 mW rating; 30 Ω ZZT @ 10 mA | Limited power handling (0.5 W vs. 1.0 W); unsuitable for >100 mA continuous regulation | Choose MMSZ4702T1G only for space-constrained PCBs where 0.5 W dissipation suffices |
Compared with 1N4748A-T and MMSZ4702T1G, the 1N4748APE3/TR12 delivers full 1.0 W power capability in an RoHS-compliant, tape-and-reel format ideal for automated through-hole insertion and industrial-grade thermal reliability.
Availability
1N4748APE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and signal conditioning applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant procurement.
Supply support for 1N4748APE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized plastic packages for mission-critical power and protection functions.
FAQ
What is the zener voltage tolerance for 1N4748APE3/TR12?
The 1N4748APE3/TR12 has a nominal zener voltage of 22 V with ±5% tolerance, as indicated by the "A" suffix per JEDEC standard. This tolerance is measured at 11.5 mA test current and 25°C lead temperature. The "P" denotes plastic encapsulation, and "e3" confirms RoHS-compliant matte-tin plating. No additional tolerance modifiers (e.g., "C" or "D") are present in this part number.
What package type does 1N4748APE3/TR12 use?
The 1N4748APE3/TR12 uses the DO-41 (also designated DO-204AL) axial-lead plastic package. Its dimensions conform to JEDEC standards, with a void-free thermosetting epoxy body rated UL94V-0. The cathode is marked by a colored band, and leads are RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
What is the maximum surge current rating for 1N4748APE3/TR12?
The 1N4748APE3/TR12 has a maximum non-repetitive surge current (ISM) of 205 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating supports transient overvoltage suppression in industrial power rails, such as 24 V DC systems subject to inductive switching spikes.
Is 1N4748APE3/TR12 suitable for lead-free soldering processes?
Yes, the 1N4748APE3/TR12 is qualified for lead-free soldering: its "e3" suffix denotes RoHS-compliant matte-tin plating, and it withstands 260°C for 10 seconds per MIL-STD-750 Method 2026. The device is moisture sensitivity Level 1 per J-STD-020B, so no dry pack or baking is required prior to reflow or wave soldering.
How does thermal resistance affect PCB layout for 1N4748APE3/TR12?
The 1N4748APE3/TR12 has 45 °C/W junction-to-lead thermal resistance at 3/8″ (10 mm) lead length, meaning heat is primarily conducted through the leads-not the package body. For optimal thermal performance, maintain ≥10 mm straight lead length between PCB pad and component body and use wide copper traces; FR4 board derating drops to 105 °C/W junction-to-ambient under standard pad conditions.
1N4748APE3/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:
- ±5%
- 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)
1N4748APE3/TR12 FAQ
1.How can I place an order for 1N4748APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748APE3/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 1N4748APE3/TR12 reliable?
The price and inventory of 1N4748APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4748APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4748APE3/TR12?
1N4748APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748APE3/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 1N4748APE3/TR12?
For technical support, including 1N4748APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748APE3/TR12 requirements.
6.How does Aetrix verify that 1N4748APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4748APE3/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 1N4748APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4748APE3/TR12?
All 1N4748APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748APE3/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 1N4748APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4748APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748APE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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