My Inquiry
My Account
Microchip Technology 1N4752CPE3/TR12
- Part No.:
- 1N4752CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752CPE3/TR12.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,362
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4752CPE3/TR12 from Microsemi is a 33 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 7.5 mA test current, 45 Ω dynamic impedance at IZT, and 1000 mA maximum regulator current at TA = 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4752CPE3/TR12 datasheet, 1N4752CPE3/TR12 pinout, 1N4752CPE3/TR12 application, or 1N4752CPE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This Zener operates in reverse breakdown to maintain stable voltage across a wide current range (1–1000 mA) and temperature span (−65°C to +150°C). Its 33 V nominal Zener voltage exhibits a positive temperature coefficient above 5 V, with typical TC of +12 mV/°C near 33 V as shown in Figure 3.
The device uses void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and axial-leaded DO-41 mechanical form factor. It is moisture-sensitive Level 1 per J-STD-020B-no dry pack required-and ESD-nonsensitive per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±2% at IZT = 7.5 mA - defines regulated output voltage with tight tolerance for reference stability |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous power handling under defined thermal conditions |
| Dynamic Impedance | 45 Ω at IZT = 7.5 mA - determines regulation stiffness and output voltage variation under load transients |
| Max Regulator Current | 1000 mA at TA = 50°C - specifies peak steady-state reverse current before thermal runaway |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead conduction path, critical for PCB layout heat sinking |
| Reverse Leakage | 5 μA max at VR = 25.1 V - ensures low standby power loss in high-impedance bias networks |
| Solder Temperature | 260°C for 10 s max - defines reflow profile compatibility with standard lead-free assembly processes |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded 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 node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to unregulated input; delivers stable 33 V to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables precise voltage references without post-calibration in analog power supplies and sensor excitation circuits |
| RoHS-compliant "e3" suffix | Meets global environmental compliance requirements with annealed matte-tin plating compatible with Pb-free reflow |
| DO-41 plastic package (P suffix) | Reduces thermal resistance vs. glass-body variants, improving power handling in compact through-hole designs |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints, simplifying inventory and assembly logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Removes need for special ESD handling during board assembly and field service |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete pass-transistor circuits. IC Role / Device Role / Timing Role: Shunt voltage reference providing accurate 33 V setpoint to error amplifier inputs. Use Value: Tight ±2% tolerance ensures output voltage accuracy within ±0.66 V across production lots without trimming. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Clamping element diverting excess energy to ground when input exceeds 33 V. Use Value: 1000 mA surge current rating supports robust clamping of 100 ns–1 µs transients per MIL-STD-461/DO-160. |
| Automotive Sensor Excitation | Programmable Current Source Bias |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine control units. IC Role / Device Role / Timing Role: Precision voltage source feeding Wheatstone bridge top rail under wide ambient temperature swings. Use Value: Low 45 °C/W thermal resistance maintains regulation stability despite under-hood temperatures up to +125°C. | Use Scenario: Setting reference current for constant-current LED drivers or laser diode bias circuits. IC Role / Device Role / Timing Role: Voltage reference establishing IREF = VZ/RSET in op-amp-based current mirrors. Use Value: 45 Ω dynamic impedance minimizes current drift due to supply ripple, ensuring <0.5% output current variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A | No "C" tolerance suffix → ±5% VZ; same DO-41 package and 33 V nominal rating | Acceptable where cost sensitivity outweighs precision; requires wider system tolerance budget | Select 1N4752A only if ±5% regulation error is acceptable in final design margin |
| BZX55C33 | Same 33 V ±2%, but DO-35 glass package; higher thermal resistance (≈120 °C/W); 500 mW rating | Not suitable for 1 W continuous operation; limited to low-power signal-level clamping | Choose BZX55C33 only for space-constrained signal-path applications where power dissipation ≤0.5 W |
Compared with 1N4752A and BZX55C33, the 1N4752CPE3/TR12 delivers tighter voltage tolerance than the former and higher power capability than the latter-making it uniquely suited for industrial-grade 1 W shunt references requiring both precision and thermal robustness.
Availability
1N4752CPE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and overvoltage protection circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4752CPE3/TR12 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 1N47xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal resilience, ESD immunity, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N4752CPE3/TR12?
The 1N4752CPE3/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This means its measured breakdown voltage at 7.5 mA test current falls between 32.34 V and 33.66 V at TL = 25°C. This tighter tolerance supports precision reference applications where ±5% devices like the 1N4752A would introduce unacceptable error margins.
Is the 1N4752CPE3/TR12 RoHS compliant?
Yes, the 1N4752CPE3/TR12 is RoHS compliant, confirmed by the "e3" suffix in its designation. It features annealed matte-tin plating on axial leads, qualified per MIL-STD-750 Method 2026, and meets lead-free soldering requirements with a 260°C/10 s maximum reflow profile. The device contains no restricted substances above EU RoHS thresholds.
What package type does the 1N4752CPE3/TR12 use?
The 1N4752CPE3/TR12 uses the DO-41 (JEDEC DO-204AL) plastic axial-leaded package. This package offers lower thermal resistance (45 °C/W junction-to-lead) compared to glass-body alternatives and is moisture-sensitive Level 1 per J-STD-020B-requiring no dry pack prior to assembly. Polarity is marked by a cathode band.
What is the maximum continuous Zener current for the 1N4752CPE3/TR12?
The maximum continuous regulator current for the 1N4752CPE3/TR12 is 1000 mA at ambient temperature TA = 50°C when mounted on an FR4 PCB with specified copper pad geometry. At higher temperatures, derating applies per Figure 1; at TA = 45°C, full 1 W dissipation is supported. Exceeding this current risks thermal runaway and permanent degradation.
Does the 1N4752CPE3/TR12 require special ESD handling?
No, the 1N4752CPE3/TR12 is nonsensitive to electrostatic discharge per MIL-STD-750 Method 1020. It does not require ESD-safe workstations, wrist straps, or conductive packaging during handling or assembly. This simplifies manufacturing flow and reduces risk of latent damage in high-volume production environments.
1N4752CPE3/TR12 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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 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)
1N4752CPE3/TR12 FAQ
1.How can I place an order for 1N4752CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752CPE3/TR12 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 1N4752CPE3/TR12 reliable?
The price and inventory of 1N4752CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4752CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752CPE3/TR12?
1N4752CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752CPE3/TR12 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 1N4752CPE3/TR12?
For technical support, including 1N4752CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4752CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4752CPE3/TR12 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 1N4752CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4752CPE3/TR12?
All 1N4752CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752CPE3/TR12, 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 1N4752CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4752CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752CPE3/TR12 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…
