My Inquiry
My Account
Microchip Technology 1N4752APE3/TR8
- Part No.:
- 1N4752APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752APE3/TR8.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4752APE3/TR8 from Microsemi is a 1.0 W, 33 V ±5% plastic-encapsulated Zener diode in DO-41 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 delivers stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4752APE3/TR8 datasheet, 1N4752APE3/TR8 pinout, 1N4752APE3/TR8 application, or 1N4752APE3/TR8 equivalent, key selection factors include its 33 V nominal Zener voltage, 1.0 W power rating at 25°C with defined derating, DO-41 axial-leaded mechanical form, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This Zener operates in reverse breakdown to maintain a stable 33 V reference across a wide current range (IZK = 0.25 mA to IZM = 1000 mA), with low dynamic impedance (45 Ω) ensuring minimal voltage variation under load transients. Its thermal resistance is 45 °C/W junction-to-lead (3/8" lead length) and 105 °C/W junction-to-ambient on FR4 board.
The device features moisture sensitivity Level 1 per J-STD-020B (no dry pack required), nonsensitive ESD performance per MIL-STD-750 Method 1020, and UL94V-0 epoxy case. Polarity is marked by cathode band; regulation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 7.5 mA - defines precise regulation point for feedback loops and references |
| Power Dissipation | 1.0 W at TL ≤ 105°C (3/8" lead) - sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZT) | 45 Ω at IZT = 7.5 mA - determines output voltage stability under varying load current |
| Max Regulator Current (IZM) | 1000 mA at TA = 50°C - establishes safe peak current capability before thermal runaway |
| Reverse Leakage (IR) | 5 μA max at VR = 25.1 V - ensures low standby power loss in high-impedance bias networks |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate thermal design when leads serve as primary heat path |
| Operating Temperature | –65°C to +150°C - supports deployment in automotive under-hood and industrial control environments |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded plastic encapsulated diode with cathode band marking. 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 shunt configuration | Connected to system ground or lower-potential rail; carries full regulator current during conduction |
| Cathode | Regulated output node | Marked by band; held at stable 33 V above anode; supplies reference voltage to error amplifiers or sensing circuits |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering per JEDEC J-STD-020, eliminating Pb-based process constraints |
| Moisture sensitivity Level 1 | Allows indefinite floor life without dry-packaging or baking, reducing handling overhead in SMT lines |
| Low thermal resistance (45 °C/W) | Supports higher power operation with minimal lead-length-dependent temperature rise in through-hole layouts |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during assembly, lowering manufacturing risk |
| Tape-and-reel packaging (TR8) | Enables automated pick-and-place insertion for high-volume production of power supply PCBs |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback networks to set output voltage in AC/DC adapters and DC/DC converters. IC Role / Device Role / Timing Role: Zener reference element providing stable 33 V threshold for error amplifier comparison. Use Value: Maintains ±5% output regulation accuracy across line/load/temperature with 45 Ω dynamic impedance limiting feedback loop perturbation. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages exceeding 33 V. IC Role / Device Role / Timing Role: Shunt protection device conducting surge current away from downstream circuitry during ESD or inductive kick events. Use Value: Absorbs up to 1000 mA peak current (ISM = 1000 mA) without failure, protecting 3.3 V or 5 V logic interfaces. |
| Bias Voltage Reference | Linear Regulator Pre-regulation |
Use Scenario: Supplies fixed bias to transistor bases, op-amp inputs, or sensor excitation circuits requiring stable DC voltage. IC Role / Device Role / Timing Role: Passive voltage reference source delivering 33 V with low temperature coefficient and minimal current draw. Use Value: Provides <5 μA leakage at 25.1 V, enabling high-impedance bias networks with negligible loading error. | Use Scenario: Positioned upstream of LDOs or series pass transistors to reduce dropout voltage stress and improve efficiency. IC Role / Device Role / Timing Role: Pre-regulator that holds intermediate rail at 33 V, allowing downstream regulators to operate with lower input-to-output differential. Use Value: Handles 1.0 W dissipation continuously, enabling robust pre-regulation for 24 V industrial systems feeding 12 V or 5 V subsystems. |
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 "e3" RoHS suffix; Sn/Pb terminations; TR8 tape not standard | Not suitable for lead-free assembly; requires dry pack if stored >12 months | Select only for legacy Pb-based processes where RoHS compliance is waived |
| MMSZ4708T1G | Surface-mount SOD-123 package; 33 V ±5%; 500 mW rating; 30 Ω ZZT | Lower power handling; unsuitable for >500 mW continuous dissipation; smaller footprint | Choose for space-constrained PCBs where thermal budget allows reduced power rating |
Compared with 1N4752A and MMSZ4708T1G, the 1N4752APE3/TR8 offers full 1.0 W dissipation in through-hole DO-41 form with guaranteed RoHS compliance and tape-and-reel automation support-making it optimal for industrial power supplies requiring robust, assembly-ready Zener regulation.
Availability
1N4752APE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4752APE3/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 general-purpose voltage regulation in cost-sensitive, high-volume industrial power systems-balancing precision, ruggedness, and manufacturability in JEDEC-standard packages.
FAQ
What is the Zener voltage tolerance of the 1N4752APE3/TR8?
The 1N4752APE3/TR8 has a nominal Zener voltage of 33 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per Microsemi's JEDEC-registered specification. This tolerance applies at IZT = 7.5 mA and TL = 25°C. The "e3" suffix confirms RoHS-compliant matte-tin plating, and "TR8" denotes tape-and-reel packaging per EIA-296 standards. The 1N4752APE3/TR8 maintains this tolerance across its qualified operating temperature range.
Can the 1N4752APE3/TR8 be used in surface-mount designs?
No-the 1N4752APE3/TR8 uses a DO-41 axial-leaded package and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4752A and MLL4752A in DO-214AC and SOD-123 packages respectively. The 1N4752APE3/TR8 itself requires hole drilling and wave/soldering processes; attempting SMT placement would compromise mechanical integrity and thermal performance due to its lead geometry and body construction.
What is the maximum steady-state power dissipation for the 1N4752APE3/TR8?
The 1N4752APE3/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) ≤ 105°C with 3/8" (10 mm) lead length from the body, or at ambient temperature (TA) ≤ 45°C when mounted on FR4 board with specified copper pads. Derating is required above these temperatures per Figure 1 in the datasheet. This 1.0 W rating is a key differentiator from lower-power Zeners like the MMSZ4708T1G (500 mW), making the 1N4752APE3/TR8 suitable for higher-current regulation tasks.
How does the thermal resistance of the 1N4752APE3/TR8 affect PCB layout?
The 1N4752APE3/TR8 has a junction-to-lead thermal resistance of 45 °C/W, meaning effective heat removal depends critically on lead length and copper connection area. Layout best practice is to use ≥10 mm straight leads and connect both leads to ≥4 mm² copper pours. On FR4 with 1 oz Cu, junction-to-ambient resistance rises to 105 °C/W-so board-level thermal design must account for this. The 1N4752APE3/TR8's DO-41 package relies on leads-not the body-for primary heat conduction, unlike SMD Zeners.
Is the 1N4752APE3/TR8 suitable for automotive under-hood applications?
Yes-the 1N4752APE3/TR8 is qualified for operation from –65°C to +150°C and meets MIL-STD-750 ESD requirements, supporting under-hood deployment. Its UL94V-0 epoxy case resists thermal cycling and fluid exposure, and the 45 °C/W thermal resistance enables reliable operation with proper lead heatsinking. However, system-level validation-including vibration, chemical exposure, and transient immunity-is required per AEC-Q101 guidelines, as the 1N4752APE3/TR8 is not AEC-Q101 certified out-of-box.
1N4752APE3/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):
- 33 V
- Tolerance:
- ±5%
- 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)
1N4752APE3/TR8 FAQ
1.How can I place an order for 1N4752APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752APE3/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 1N4752APE3/TR8 reliable?
The price and inventory of 1N4752APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4752APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752APE3/TR8?
1N4752APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752APE3/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 1N4752APE3/TR8?
For technical support, including 1N4752APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752APE3/TR8 requirements.
6.How does Aetrix verify that 1N4752APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4752APE3/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 1N4752APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4752APE3/TR8?
All 1N4752APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752APE3/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 1N4752APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4752APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752APE3/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…
