My Inquiry
My Account
Microchip Technology 1N4748E3/TR13
- Part No.:
- 1N4748E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4748E3/TR13.pdf
- Description:
- DIODE ZENER 22V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,178
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4748E3/TR13 from Microsemi is a 1.0 W axial-lead silicon Zener diode with a nominal Zener voltage of 22 V ±5%, 11.5 mA test current (IZT), 23 Ω dynamic impedance (ZZT), and maximum reverse current of 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 1N4748E3/TR13 datasheet, 1N4748E3/TR13 pinout, 1N4748E3/TR13 application, or 1N4748E3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (750 mA), RoHS-compliant matte-tin plating, and DO-41 package compatibility with standard axial-lead PCB layouts.
Technical Context
This Zener operates in reverse breakdown to maintain stable output voltage under varying load and line conditions. Its 22 V regulation point is specified at 11.5 mA IZT with 23 Ω dynamic impedance, ensuring low voltage deviation across operating current range (0.25–750 mA).
Designed for through-hole mounting on FR4 boards, it exhibits 105 °C/W junction-to-ambient thermal resistance with defined copper pad layout (4 mm², 1 mm trace width), and supports soldering at 260 °C for 10 s. Polarity is marked by cathode band; regulation requires cathode-positive bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 22 V ±5% at 11.5 mA - defines precise regulation threshold for reference and clamp circuits |
| Power Dissipation | 1.0 W at 25 °C lead temperature - sets maximum continuous DC power handling before derating |
| Dynamic Impedance (ZZT) | 23 Ω at IZT - determines output voltage stability under small-signal AC ripple superimposed on DC current |
| Max Reverse Current (IR) | 5 μA at 16.7 V - ensures minimal leakage below regulation knee, critical for low-power standby modes |
| Surge Current (ISM) | 750 mA (½-sine, 1/120 s) - enables transient overvoltage suppression without device failure |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - informs heatsinking requirements for sustained operation |
| Operating Temperature | −65 °C to +150 °C - supports deployment in automotive engine compartments and industrial control enclosures |
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 per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; carries full regulator current during clamping |
| Cathode | Regulated output terminal | Banded end; held at stable 22 V above anode when reverse-biased above Vz |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with JEDEC 1N4748A specification, ensuring cross-manufacturer interchangeability |
| RoHS-compliant "e3" suffix | Matte-tin termination meets EU RoHS Directive 2011/65/EU and J-STD-609A Class 3 marking |
| Moisture Sensitivity Level 1 | No dry-pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage logistics |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands human-body-model discharges without parameter shift |
| Tape-and-reel packaging | "TR13" suffix denotes EIA-296-compliant 13-inch reel - enables automated pick-and-place assembly |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
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 for error amplifier input. Use Value: Maintains ±5% output accuracy over −65 °C to +150 °C and 0.25–750 mA load range. | Use Scenario: Clamping transient spikes on 24 V DC bus lines in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus exceeds 22 V. Use Value: Withstands 750 mA surge (½-sine, 1/120 s) without degradation, preserving downstream circuit integrity. |
| Voltage Clamp for ADC Inputs | Fieldbus Signal Conditioning |
Use Scenario: Limiting analog sensor inputs to microcontroller ADCs operating from 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Input-stage clamp preventing ADC input damage from out-of-range signals. Use Value: Low 23 Ω dynamic impedance minimizes voltage overshoot during fast transients, protecting precision converters. | Use Scenario: Biasing and level-shifting RS-485 receiver inputs in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Reference stabilizer for differential receiver common-mode range alignment. Use Value: Stable 22 V Zener voltage ensures consistent bias point across temperature, reducing signal distortion. |
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; Sn/Pb termination; same electrical specs and DO-41 package | Not suitable for lead-free assembly processes requiring RoHS compliance | Select 1N4748A only for legacy Sn/Pb reflow or non-RoHS environments |
| MMSZ4702T1G | Surface-mount SOD-123 package; 22 V ±5%; 500 mW rating; higher ZZT (50 Ω) | Limited to lower-power applications; incompatible with through-hole layouts | Choose MMSZ4702T1G for space-constrained PCBs where 1 W dissipation is not required |
Compared with 1N4748A and MMSZ4702T1G, the 1N4748E3/TR13 uniquely combines full 1 W power rating, RoHS-compliant matte-tin plating, tape-and-reel automation support, and JEDEC-standard DO-41 mechanical compatibility-making it optimal for high-reliability through-hole industrial power designs.
Availability
1N4748E3/TR13 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and voltage-clamping applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N4748E3/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 solutions for aerospace, defense, and industrial markets.
The 1N47xxA series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems-emphasizing wide temperature operation, ESD resilience, and JEDEC-standard mechanical interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N4748E3/TR13?
The 1N4748E3/TR13 has a nominal Zener voltage of 22 V with a tolerance of ±5%, as indicated by the "A" suffix in its base part number (1N4748A). This tolerance is measured at 11.5 mA test current and 25 °C lead temperature, and applies across the full operating temperature range of −65 °C to +150 °C.
Does the 1N4748E3/TR13 support lead-free assembly?
Yes, the 1N4748E3/TR13 supports lead-free assembly. The "e3" suffix confirms RoHS-compliant matte-tin plating per J-STD-609A Class 3, and the device is qualified for soldering at 260 °C for 10 seconds-meeting IPC-J-STD-020D reflow profile requirements for Pb-free processes.
What is the maximum surge current rating for the 1N4748E3/TR13?
The 1N4748E3/TR13 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 transient suppression in 24 V industrial bus protection without permanent parameter shift or catastrophic failure.
How does the thermal resistance of the 1N4748E3/TR13 affect PCB layout?
The 1N4748E3/TR13 has a junction-to-lead thermal resistance of 45 °C/W at 3/8″ (10 mm) lead length, meaning PCB layout must ensure adequate copper area (minimum 4 mm² pads) and trace width (1 mm) to achieve the rated 1.0 W dissipation at 25 °C ambient. Without proper copper, power derating is required per Figure 1 in the datasheet.
Is the 1N4748E3/TR13 compatible with tape-and-reel automated assembly?
Yes, the "TR13" suffix in 1N4748E3/TR13 explicitly denotes EIA-296-compliant tape-and-reel packaging on a 13-inch reel. This configuration supports high-speed pick-and-place machines and ensures consistent orientation (cathode band facing up) for automated through-hole insertion or selective soldering processes.
1N4748E3/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:
- ±10%
- 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)
1N4748E3/TR13 FAQ
1.How can I place an order for 1N4748E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4748E3/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 1N4748E3/TR13 reliable?
The price and inventory of 1N4748E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4748E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4748E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4748E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4748E3/TR13?
1N4748E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4748E3/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 1N4748E3/TR13?
For technical support, including 1N4748E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4748E3/TR13 requirements.
6.How does Aetrix verify that 1N4748E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4748E3/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 1N4748E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4748E3/TR13?
All 1N4748E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4748E3/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 1N4748E3/TR13 part is unused and in its original packaging.
Return procedure for 1N4748E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4748E3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
