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Microchip Technology 1N4748CPE3/TR8
- Part No.:
- 1N4748CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748CPE3/TR8.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,964
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Product details
Overview
1N4748CPE3/TR8 from Microsemi is a 22 V, ±2% tolerance, 1 W plastic-encapsulated Zener diode in DO-41 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/TR8 datasheet, 1N4748CPE3/TR8 pinout, 1N4748CPE3/TR8 application, or 1N4748CPE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), surge current rating (750 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This device operates in reverse breakdown to maintain stable output voltage across varying load and line conditions. Its 22 V nominal Zener voltage is specified at 11.5 mA test current with ±2% tolerance (C suffix), and exhibits 23 Ω dynamic impedance at that bias point, ensuring low regulation error under dynamic load changes.
The DO-41 plastic package provides 45 °C/W junction-to-lead thermal resistance at 10 mm lead length, enabling reliable 1 W dissipation up to 105 °C lead temperature. It complies with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and withstands 260 °C soldering for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±2% at 11.5 mA - ensures tight regulation stability for reference circuits requiring <±0.44 V deviation. |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation in compact linear regulator feedback paths without forced cooling. |
| Dynamic Impedance (ZZT) | 23 Ω at IZT = 11.5 mA - minimizes output voltage shift under ±1 mA load current variation. |
| Reverse Leakage (IR) | 5 µA max at VR = 16.7 V - guarantees low quiescent current in high-impedance bias networks. |
| Surge Current (ISM) | 750 mA peak (½-sine, 1/120 s) - withstands transient overvoltage events in unprotected DC rails. |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design with standard axial-lead PCB mounting and 10 mm lead length. |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial and automotive under-hood environments without derating. |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; terminals are non-polarized for through-hole mounting, tin-lead or RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in Zener shunt configuration | Connected to circuit common; reverse-biased operation requires cathode at higher potential. |
| Cathode | Regulated output node | Banded end; held at stable 22 V relative to anode during breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables accurate voltage references without post-calibration in analog sensor signal chains. |
| RoHS-compliant "e3" suffix | Meets global environmental compliance requirements without sacrificing electrical performance or reliability. |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling and storage. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces risk of field failure in handling and assembly without additional ESD mitigation circuitry. |
| Tape-and-reel packaging (TR8 suffix) | Supports automated pick-and-place assembly with EIA-296 standard carrier tape and 8 mm reel width. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in adjustable linear regulators (e.g., LM317-based supplies). IC Role / Device Role / Timing Role: Shunt reference element providing precise 22 V setpoint for error amplifier comparison. Use Value: Maintains ±0.44 V regulation accuracy across –40 °C to +85 °C ambient, reducing output drift vs. ±5% variants. | Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V industrial control lines. IC Role / Device Role / Timing Role: Clamping diode diverting excess energy above 22 V to ground before IC damage threshold. Use Value: Absorbs 750 mA surge peaks without degradation, extending system uptime in noisy factory environments. |
| Voltage Monitor Threshold | Analog Sensor Biasing |
Use Scenario: Setting trip point for brown-out detection in battery-powered telemetry nodes. IC Role / Device Role / Timing Role: Precision voltage threshold generator feeding comparator input (e.g., LM393). Use Value: Delivers repeatable 22 V trigger level with <1 mV/°C tempco, minimizing false alarms across temperature extremes. | Use Scenario: Providing stable excitation voltage for resistive bridge sensors in weigh-scale transducers. IC Role / Device Role / Timing Role: Low-noise, low-drift bias source for Wheatstone bridge top rail. Use Value: 23 Ω dynamic impedance limits bridge output error to <0.05% full scale under 1 mA load variation. |
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, ±5% tolerance (A suffix), no RoHS "e3" marking, same DO-41 package | Lower accuracy acceptable where cost priority exceeds regulation precision | Select when ±5% tolerance suffices and legacy non-RoHS compliance is permitted. |
| MMSZ4702ET1G | 22 V, ±5%, SOD-123 surface-mount package, 500 mW rating, 30 Ω ZZT | Requires PCB redesign for SMT; lower power and higher impedance limit use in high-current references | Choose only for space-constrained designs accepting reduced power margin and looser regulation. |
Compared with 1N4748A and MMSZ4702ET1G, the 1N4748CPE3/TR8 delivers tighter ±2% voltage accuracy, RoHS compliance, and 1 W power handling in through-hole DO-41 form-making it optimal for industrial power references where precision, reliability, and legacy board compatibility are critical.
Availability
1N4748CPE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog sensor biasing requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4748CPE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems-emphasizing thermal stability, ESD immunity, and JEDEC-standardized performance.
FAQ
What is the Zener voltage tolerance of the 1N4748CPE3/TR8?
The 1N4748CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 22 V Zener voltage is guaranteed between 21.56 V and 22.44 V when measured at 11.5 mA test current and 25 °C lead temperature, making it suitable for precision reference applications where tighter regulation is required than standard ±5% devices.
Does the 1N4748CPE3/TR8 meet RoHS requirements?
Yes, the 1N4748CPE3/TR8 meets RoHS requirements, as confirmed by the "e3" suffix in its part number. This indicates RoHS-compliant matte-tin plating on the leads and adherence to Directive 2011/65/EU, with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances above threshold limits.
What is the maximum surge current rating for the 1N4748CPE3/TR8?
The 1N4748CPE3/TR8 has a maximum surge current (ISM) rating of 750 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 transients in industrial 24 V DC systems without permanent degradation of Zener characteristics.
What package type does the 1N4748CPE3/TR8 use?
The 1N4748CPE3/TR8 uses the DO-41 (also designated DO-204AL) axial-leaded plastic package. It features a void-free thermosetting epoxy body compliant with UL94V-0, tin-lead or RoHS-compliant matte-tin plated leads, and cathode identification via a visible color band on the body.
How is the 1N4748CPE3/TR8 marked on the device body?
The 1N4748CPE3/TR8 is marked with its full part number "1N4748C" on the device body, consistent with Microsemi's standard marking practice for the 1N47xxAP series. The "P" (plastic), "e3" (RoHS), and "TR8" (tape-and-reel) designators are order qualifiers not physically marked on the diode itself.
1N4748CPE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N4748CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748CPE3/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 1N4748CPE3/TR8 reliable?
The price and inventory of 1N4748CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4748CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4748CPE3/TR8?
1N4748CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748CPE3/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 1N4748CPE3/TR8?
For technical support, including 1N4748CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4748CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4748CPE3/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 1N4748CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4748CPE3/TR8?
All 1N4748CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748CPE3/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 1N4748CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4748CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748CPE3/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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Diodes Incorporated
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