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Microchip Technology 1N4748APE3/TR8
- Part No.:
- 1N4748APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748APE3/TR8.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,608
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Product details
Overview
1N4748APE3/TR8 from Microsemi is a 1.0 W, 22 V ±5% Zener diode in DO-41 plastic package, rated for 11.5 mA test current (IZT), 23 Ω dynamic impedance (ZZT), and 5 μA reverse leakage at 16.7 V (VR). It operates across –65°C to +150°C and regulates voltage in low-power reference and protection circuits.
For engineers reviewing the 1N4748APE3/TR8 datasheet, 1N4748APE3/TR8 pinout, 1N4748APE3/TR8 application, or 1N4748APE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45°C/W junction-to-lead), surge current rating (205 mA), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR8).
Technical Context
This axial-lead silicon Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown with sharp knee characteristics verified per MicroNote 202. Its regulation stability relies on controlled 22 V nominal Zener voltage at 11.5 mA IZT and low 23 Ω dynamic impedance at that current.
The device uses void-free UL94V-0 thermosetting epoxy encapsulation with tin-lead or RoHS-compliant matte-tin plating, marked with cathode band polarity and full part number. It meets MIL-STD-750 ESD immunity (Method 1020) and IPC/JEDEC J-STD-020B moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±5% at 11.5 mA IZT - defines precise regulation point under standard test conditions |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous DC power handling |
| Dynamic Impedance | 23 Ω at IZT = 11.5 mA - determines output voltage variation under load current changes |
| Reverse Leakage | 5 μA max at VR = 16.7 V - ensures minimal off-state current in shunt regulation |
| Surge Current (ISM) | 205 mA (½-sine, 1/120 s) - supports transient overvoltage clamping capability |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design with discrete lead heatsinking |
| Operating Temp | –65°C to +150°C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (JEDEC DO-204AL) axial-leaded plastic 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 | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node to enable reverse breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Industry-standard footprint and electrical behavior for drop-in compatibility in legacy designs |
| RoHS-compliant "e3" suffix | Lead-free matte-tin termination meeting EU RoHS Directive 2011/65/EU requirements |
| Tape-and-reel "TR8" packaging | Standard EIA-296 compliant reel format enabling automated SMT placement despite axial form factor |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands human-body-model ESD without parameter shift |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or op-amp reference inputs. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing stable 22 V reference point. Use Value: Maintains ±5% regulation accuracy across 1–205 mA operating range and –65°C to +150°C ambient. |
Use Scenario: Protecting downstream ICs from transient voltage spikes on 24 V rail systems. IC Role / Device Role / Timing Role: Passive crowbar element conducting surge current above 16.7 V threshold. Use Value: Absorbs 205 mA surge pulses (1/120 s) without degradation, limiting peak voltage to ≤22 V. |
| Signal Level Shifting | Current Source Bias |
Use Scenario: Generating fixed bias offsets for analog sensor interfaces or comparator thresholds. IC Role / Device Role / Timing Role: Precision voltage clamp establishing known DC offset in signal path. Use Value: Delivers 22 V reference with 23 Ω dynamic impedance, minimizing signal distortion under varying load. |
Use Scenario: Setting constant current in LED driver or transistor bias networks via series resistor. IC Role / Device Role / Timing Role: Stable voltage node enabling predictable IOUT = (VIN – 22 V)/R calculation. Use Value: Enables accurate current setting within ±5% tolerance across temperature and supply 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 | No "e3" RoHS suffix; tin-lead termination only; same VZ, IZT, ZZT, and package | Not suitable for lead-free assembly; requires Pb-based solder process | Select when legacy Pb-Sn assembly is mandated and RoHS exemption applies |
| MMBZ5248BS | SOT-23 surface-mount package; 22 V ±5%; 100 mW rating; 25 Ω ZZT; different thermal profile | Lower power handling (100 mW vs. 1 W); unsuitable for high-current regulation or surge clamping | Choose for space-constrained PCBs where 22 V reference is needed at ≤100 mW dissipation |
Compared with 1N4748A and MMBZ5248BS, the 1N4748APE3/TR8 uniquely combines 1 W power rating, DO-41 mechanical robustness, RoHS compliance, and tape-and-reel automation support-making it optimal for industrial power rails requiring reliable 22 V shunt regulation.
Availability
1N4748APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4748APE3/TR8 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 1N4748APE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for precision voltage regulation in harsh-environment power management and protection circuits.
FAQ
What is the Zener voltage tolerance of the 1N4748APE3/TR8?
The 1N4748APE3/TR8 has a nominal Zener voltage of 22 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC registration. This tolerance is measured at 11.5 mA test current and 25°C lead temperature. The 1N4748APE3/TR8 maintains this specification across its full operating temperature range of –65°C to +150°C, making it suitable for applications demanding stable reference accuracy under thermal stress.
Does the 1N4748APE3/TR8 meet RoHS requirements?
Yes, the 1N4748APE3/TR8 complies with EU RoHS Directive 2011/65/EU, indicated by its "e3" suffix denoting RoHS-compliant matte-tin plating. The device uses lead-free terminations and void-free UL94V-0 epoxy encapsulation. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, eliminating the need for dry packing or baking before assembly-critical for RoHS-compliant manufacturing flows.
What is the maximum surge current rating for the 1N4748APE3/TR8?
The 1N4748APE3/TR8 is rated for 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 enables the 1N4748APE3/TR8 to safely clamp transient overvoltages on 24 V systems without degradation. Surge capability is validated per Microsemi's test methodology and correlates directly with its 1 W steady-state power rating and thermal resistance profile.
How is polarity marked on the 1N4748APE3/TR8?
The 1N4748APE3/TR8 uses a cathode band marking on the plastic DO-41 body to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown regulation. This marking aligns with JEDEC DO-204AL standards and is visible under standard visual inspection. Forward voltage is specified at ≤1.2 V @ 200 mA, confirming standard silicon diode behavior in forward bias.
What does the "TR8" suffix mean in 1N4748APE3/TR8?
The "TR8" suffix in 1N4748APE3/TR8 indicates EIA-296 standard tape-and-reel packaging with 8 mm carrier tape width and 1000 units per reel. This format supports automated pick-and-place assembly despite the axial-leaded DO-41 form factor. The 1N4748APE3/TR8 reel is compatible with industry-standard feeders and provides full traceability per unit, fulfilling requirements for high-volume industrial and automotive production lines.
1N4748APE3/TR8 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/TR8 FAQ
1.How can I place an order for 1N4748APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748APE3/TR8 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/TR8 reliable?
The price and inventory of 1N4748APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4748APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4748APE3/TR8?
1N4748APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748APE3/TR8 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/TR8?
For technical support, including 1N4748APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748APE3/TR8 requirements.
6.How does Aetrix verify that 1N4748APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4748APE3/TR8 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/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4748APE3/TR8?
All 1N4748APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748APE3/TR8, 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/TR8 part is unused and in its original packaging.
Return procedure for 1N4748APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748APE3/TR8 Tags
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MM5Z5V1ST1G
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