My Inquiry
My Account
Microchip Technology 1N4733CPE3/TR8
- Part No.:
- 1N4733CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733CPE3/TR8.pdf
- Description:
- DIODE ZENER 5.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,009
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4733CPE3/TR8 from Microsemi is a 5.1 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 49 mA test current, 7 Ω dynamic impedance at IZT, and reverse leakage ≤10 μA at 3.8 V. It provides precision voltage regulation in power supply reference and overvoltage protection circuits across industrial control systems.
For engineers reviewing the 1N4733CPE3/TR8 datasheet, 1N4733CPE3/TR8 pinout, 1N4733CPE3/TR8 application, or 1N4733CPE3/TR8 equivalent, key selection factors include its tight 2% VZ tolerance, low ZZT, JEDEC-compliant DO-41 mechanical form, RoHS-compliant matte-tin plating, and TR8 tape-and-reel packaging for automated assembly.
Technical Context
This Zener operates in reverse breakdown to maintain stable 5.1 V output across 1–178 mA regulation current range (IZM = 178 mA at TL = 50°C). Its 7 Ω dynamic impedance ensures minimal voltage deviation under load transients, while the 0.5% typical temperature coefficient near 5.1 V supports stable performance from –65°C to +150°C.
The device uses axial-leaded DO-41 construction with cathode band marking, tin-lead or RoHS-compliant matte-tin terminals, and UL94V-0 void-free epoxy encapsulation. Thermal resistance is 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 board per specified layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±2% at IZT = 49 mA - enables precise 5 V rail regulation with low tolerance drift |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous operation in compact PCB layouts with adequate lead heatsinking |
| Dynamic Impedance (ZZT) | 7 Ω max at IZT = 49 mA - limits output voltage variation under changing load currents |
| Reverse Leakage (IR) | ≤10 μA at VR = 3.8 V - ensures low quiescent current in standby or sensing circuits |
| Max Regulator Current (IZM) | 178 mA at TL = 50°C - defines safe upper limit for sustained Zener conduction without thermal runaway |
| Forward Voltage | ≤1.2 V at IF = 200 mA - guarantees reliable forward conduction for polarity-check or clamping use cases |
| Operating Temperature | –65°C to +150°C - suitable for under-hood automotive, industrial motor drives, and outdoor power electronics |
Pinout & Package
Package: DO-41 (JEDEC DO-204AL), axial-leaded plastic case with cathode indicated by colored 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 | Non-banded end | Connected to lower-potential node; carries full Zener current during regulation |
| Cathode | Banded end | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Reduces need for post-production trimming in voltage reference designs |
| RoHS-compliant matte-tin plating (e3 suffix) | Enables lead-free reflow soldering per J-STD-020 without compromising wetting or reliability |
| Tape-and-reel packaging (TR8 suffix) | Supports high-speed pick-and-place assembly with EIA-296 standard carrier tape pitch |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for factory handling |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces need for ESD-safe handling protocols during manual or automated assembly |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener reference element providing fixed 5.1 V threshold for TL431 or optocoupler bias networks. Use Value: Tight ±2% tolerance ensures consistent output voltage accuracy across production batches without calibration. | Use Scenario: Clamping transient surges on 5 V logic rails exposed to relay switching or inductive loads. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy above 5.1 V to protect downstream CMOS inputs. Use Value: 1 W power rating and 178 mA IZM allow robust single-device clamping without external series resistance. |
| Automotive Sensor Biasing | Programmable Current Source Reference |
Use Scenario: Providing stable excitation voltage for resistive temperature sensors (RTDs) in engine control units. IC Role / Device Role / Timing Role: Precision voltage source establishing known current through sensor bridge arms. Use Value: Low 7 Ω ZZT minimizes current error caused by varying sensor impedance over temperature. | Use Scenario: Setting reference voltage for constant-current LED driver ICs in dashboard backlighting. IC Role / Device Role / Timing Role: Regulation node defining IOUT via external sense resistor in LM317-based current sources. Use Value: Stable 5.1 V output with <10 μA leakage ensures predictable current setpoint across wide ambient ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, but ±5% tolerance (A suffix) instead of ±2% | Acceptable where cost-sensitive designs tolerate wider output voltage spread | Select when tighter tolerance is unnecessary and legacy BOM compatibility is required |
| BZX55-C5V1 | Same 5.1 V ±2%, but DO-35 glass package and 500 mW rating | Lower power dissipation limits use to low-current references only | Choose for space-constrained layouts where DO-35 footprint fits, but derate for <500 mW operation |
Compared with 1N4733A and BZX55-C5V1, the 1N4733CPE3/TR8 delivers superior thermal performance (1 W vs. 500 mW), tighter tolerance than the A-suffix variant, and RoHS-compliant tape-and-reel readiness-making it optimal for high-reliability, automated, and thermally demanding applications.
Availability
1N4733CPE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and programmable current sources requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4733CPE3/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 1N47xxAP series was designed specifically for precision voltage regulation in harsh-environment power systems, emphasizing JEDEC compliance, extended temperature operation, and robust packaging for mission-critical applications.
FAQ
What is the Zener voltage tolerance of the 1N4733CPE3/TR8?
The 1N4733CPE3/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in the part number. This means its nominal 5.1 V breakdown voltage is guaranteed between 4.998 V and 5.202 V when measured at 49 mA test current and 25°C lead temperature. This tighter tolerance supports higher-accuracy voltage references compared to the ±5% 1N4733A variant.
What does the "e3" suffix mean in 1N4733CPE3/TR8?
The "e3" suffix in 1N4733CPE3/TR8 denotes RoHS-compliant matte-tin terminal plating, replacing traditional tin-lead finishes. This allows the 1N4733CPE3/TR8 to meet EU RoHS Directive 2011/65/EU requirements and supports lead-free reflow soldering processes without sacrificing solderability or long-term intermetallic stability.
What is the maximum Zener current rating for the 1N4733CPE3/TR8?
The 1N4733CPE3/TR8 has a maximum regulator current (IZM) of 178 mA at a lead temperature of 50°C. This value decreases with rising temperature due to power derating; at 105°C lead temperature, the device must be operated below 1.0 W total dissipation. The 1N4733CPE3/TR8 must be mounted with ≥3/8" (10 mm) lead length from body to achieve the rated 45°C/W thermal resistance.
How is polarity marked on the 1N4733CPE3/TR8?
The 1N4733CPE3/TR8 uses a cathode band - a single colored stripe near one end of the DO-41 plastic body - to indicate the cathode terminal. For proper Zener regulation, the banded end must be held at a higher potential than the opposite (anode) end. Forward conduction occurs when the anode is positive relative to the cathode, with VF ≤1.2 V at 200 mA.
What packaging format does the "TR8" suffix specify for the 1N4733CPE3/TR8?
The "TR8" suffix indicates that the 1N4733CPE3/TR8 is supplied in EIA-296 standard tape-and-reel packaging, with 8 mm carrier tape width and component spacing optimized for high-speed automated placement equipment. Each reel contains 1,000 units, enabling efficient SMT line feeding and inventory control for medium-to-high volume production runs.
1N4733CPE3/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):
- 5.1 V
- Tolerance:
- ±2%
- 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)
1N4733CPE3/TR8 FAQ
1.How can I place an order for 1N4733CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733CPE3/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 1N4733CPE3/TR8 reliable?
The price and inventory of 1N4733CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4733CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733CPE3/TR8?
1N4733CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733CPE3/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 1N4733CPE3/TR8?
For technical support, including 1N4733CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4733CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4733CPE3/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 1N4733CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4733CPE3/TR8?
All 1N4733CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733CPE3/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 1N4733CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4733CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733CPE3/TR8 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…
