My Inquiry
My Account
Microchip Technology 1N4733E3/TR13
- Part No.:
- 1N4733E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733E3/TR13.pdf
- Description:
- DIODE ZENER 5.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4733E3/TR13 from Microsemi is a 5.1 V, ±5% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 49 mA test current, 7 Ω dynamic impedance at IZT, and 10 µA reverse leakage at 3.8 V. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4733E3/TR13 datasheet, 1N4733E3/TR13 pinout, 1N4733E3/TR13 application, or 1N4733E3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (890 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 5.1 V reference across a wide current range (0.25–49 mA). Its 7 Ω dynamic impedance at 49 mA ensures low output variation under load transients, while its -65 °C to +150 °C operating range supports harsh-environment deployment.
The device uses a void-free thermosetting epoxy case (UL94V-0) with axial leads, cathode band polarity marking, and tin-lead or RoHS-compliant matte-tin plating. Thermal performance is specified at 3/8″ (10 mm) lead length (45 °C/W) and on FR4 board (105 °C/W), enabling accurate power derating in PCB-level thermal design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 49 mA - defines nominal regulation point with bounded error for precision reference use |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum steady-state thermal load with defined lead temperature limit |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 49 mA - determines output voltage change per mA of load current variation |
| Reverse Leakage Current | 10 µA max at VR = 3.8 V - specifies minimum off-state conduction before breakdown onset |
| Surge Current (ISM) | 890 mA peak (½-sine, 1/120 s) - defines transient overvoltage handling capability without damage |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables direct calculation of junction temperature rise under DC bias |
| Forward Voltage | 1.2 V max at 200 mA - constrains forward-conduction loss in clamp or dual-direction protection schemes |
Pinout & Package
DO-41 (JEDEC DO-204AL) plastic axial-leaded package with cathode indicated by color band; body diameter 2.0–2.7 mm, overall length 4.5–5.5 mm, lead diameter 0.4–0.6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in Zener configuration | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node in Zener configuration | Banded end; held at stable 5.1 V above anode when reverse current ≥ IZK (1 mA min) |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per MIL-STD-750 Method 2026, eliminating lead content without solderability compromise |
| Tape-and-reel packaging | EIA-296 compliant carrier with "TR13" suffix - supports automated SMT placement despite axial form factor |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands human-body-model discharges without parameter shift or failure |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants - improves power handling in compact layouts |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or ADC reference buffers. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, sinking excess current to maintain fixed 5.1 V at error amplifier input. Use Value: Delivers ±5% regulation accuracy with 7 Ω dynamic impedance, minimizing output drift under varying load conditions. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 5.5 V. IC Role / Device Role / Timing Role: Reverse-biased clamping element diverting surge current away from sensitive inputs when voltage exceeds 5.1 V. Use Value: Withstands 890 mA surge pulses and exhibits only 10 µA leakage below 3.8 V, ensuring low standby power and reliable turn-on. |
| Temperature-Stable Bias Network | Current Source Stabilization |
Use Scenario: Establishing bias points in op-amp circuits requiring minimal thermal drift. IC Role / Device Role / Timing Role: Zener diode providing temperature-compensated reference voltage for transistor base biasing networks. Use Value: Operates across -65 °C to +150 °C with known tempco curve (Figure 3), enabling predictable offset compensation in wide-range environments. | Use Scenario: Setting constant current through LED strings or sensor excitation paths. IC Role / Device Role / Timing Role: Series-pass element in constant-current sink configuration, leveraging sharp Zener knee at 1 mA (IZK). Use Value: Maintains regulation down to 1 mA knee current, allowing stable 5.1 V reference even at low-power standby states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | No "e3" RoHS suffix; Sn/Pb plating; same electrical specs and DO-41 package | Not suitable for lead-free assembly processes requiring RoHS compliance | Select 1N4733E3/TR13 when lead-free soldering and tape-and-reel automation are required |
| BZX55-C5V1 | Same 5.1 V ±5%, but 500 mW rating; DO-35 package; higher ZZT (10 Ω) | Lower power handling limits use in >500 mW dissipation scenarios; smaller footprint may constrain heatsinking | Choose BZX55-C5V1 only for space-constrained, low-power (<0.5 W) designs where thermal margin is sufficient |
Compared with 1N4733A and BZX55-C5V1, the 1N4733E3/TR13 offers full RoHS compliance, 1 W power rating, and EIA-296 tape-and-reel packaging-making it optimal for high-reliability, automated, lead-free production of industrial power management systems.
Availability
1N4733E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, embedded system voltage references, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N4733E3/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 discrete components for aerospace, defense, and industrial markets.
The 1N4733E3/TR13 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for robust voltage regulation in mission-critical power conditioning and protection applications across extreme temperature and reliability requirements.
FAQ
What is the Zener voltage tolerance of the 1N4733E3/TR13?
The 1N4733E3/TR13 has a nominal Zener voltage of 5.1 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC designation. This means the actual measured VZ falls between 4.85 V and 5.36 V when tested at 49 mA and 25 °C lead temperature. The tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range.
Does the 1N4733E3/TR13 support lead-free assembly processes?
Yes, the 1N4733E3/TR13 is RoHS-compliant with matte-tin plating per MIL-STD-750 Method 2026, qualified for lead-free reflow up to 260 °C for 10 seconds. Its "e3" suffix explicitly denotes RoHS compliance, and the device meets IPC/JEDEC J-STD-020B moisture sensitivity Level 1-eliminating dry-pack requirements and enabling direct placement into Pb-free SMT lines.
What is the maximum surge current rating for the 1N4733E3/TR13?
The 1N4733E3/TR13 is rated for a peak reverse surge current (ISM) of 890 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating reflects its ability to absorb transient energy without degradation, making it suitable for clamping fast-rising voltage spikes in power rails and I/O protection networks.
How does thermal resistance affect the 1N4733E3/TR13's power derating?
The 1N4733E3/TR13 has a junction-to-lead thermal resistance of 45 °C/W at 3/8″ (10 mm) lead length. At ambient temperatures above 45 °C on FR4 board, power must be linearly derated from 1.0 W to zero at 150 °C. For example, at TA = 75 °C, maximum allowable power drops to 0.75 W-directly calculable using the published derating curve (Figure 1) and thermal model.
Is the 1N4733E3/TR13 compatible with automated pick-and-place equipment?
Yes, the "TR13" suffix indicates EIA-296 standard tape-and-reel packaging, designed for compatibility with industry-standard SMT feeders and pick-and-place machines. Though physically axial-leaded, its reel format enables high-throughput placement in mixed-technology assemblies-particularly valuable for hybrid boards combining through-hole Zeners with surface-mount ICs.
1N4733E3/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):
- 5.1 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
1N4733E3/TR13 FAQ
1.How can I place an order for 1N4733E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733E3/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 1N4733E3/TR13 reliable?
The price and inventory of 1N4733E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4733E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733E3/TR13?
1N4733E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733E3/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 1N4733E3/TR13?
For technical support, including 1N4733E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733E3/TR13 requirements.
6.How does Aetrix verify that 1N4733E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4733E3/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 1N4733E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4733E3/TR13?
All 1N4733E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733E3/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 1N4733E3/TR13 part is unused and in its original packaging.
Return procedure for 1N4733E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733E3/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…
