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Microchip Technology 1N4752AP/TR12
- Part No.:
- 1N4752AP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752AP/TR12.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,218
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Product details
Overview
1N4752AP/TR12 from Microsemi is a 1.0 W, 33 V ±5% axial-lead Zener diode in DO-41 (DO-204AL) plastic package, rated for 7.5 mA test current, 27 Ω dynamic impedance at IZT, and 135 mA maximum Zener current at TA = 50°C. It delivers stable voltage regulation in power supply reference, overvoltage protection, and analog signal conditioning circuits.
For engineers reviewing the 1N4752AP/TR12 datasheet, 1N4752AP/TR12 pinout, 1N4752AP/TR12 application, or 1N4752AP/TR12 equivalent, key selection factors include its 33 V nominal Zener voltage with 5% tolerance, 1.0 W steady-state power rating at TL < 105°C, thermal resistance of 45°C/W (junction-to-lead), and RoHS-compliant "e3" plating option confirmed in Microsemi's REV C datasheet.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 33 V reference across a wide current range (1–135 mA) and temperature span (−65°C to +150°C). Its 27 Ω dynamic impedance at 7.5 mA ensures low output variation under load transients.
The DO-41 package provides flexible axial-lead mounting with cathode band polarity marking, tin-lead or matte-tin plating per MIL-STD-750 Method 2026, and UL94V-0 epoxy body. Thermal performance is specified for 3/8″ (10 mm) lead length from body (45°C/W) and FR4 PCB mounting (105°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 7.5 mA, TL = 25°C - defines precise regulation point for reference design |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZT) | 27 Ω @ IZT = 7.5 mA - determines output voltage deviation under varying current |
| Max Regulator Current (IZM) | 135 mA at TA = 50°C - defines upper safe operating current limit in ambient-constrained layouts |
| Reverse Leakage (IR) | <5 μA @ VR = 25.1 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Forward Voltage | ≤1.2 V @ 200 mA - supports use as clamp or series diode in dual-polarity protection schemes |
| Thermal Resistance | 45°C/W junction-to-lead - enables accurate junction temperature estimation from measured lead temperature |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by a single black 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 | Non-banded end | Connected to lower potential node; forward conduction path when biased positive relative to cathode |
| Cathode | Banded end | Connected to higher potential node during Zener operation; defines regulated output node in shunt configuration |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures industry-standard form, fit, and function compatibility across multiple suppliers |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations in production |
| RoHS-compliant "e3" suffix option | Supports compliance with EU RoHS Directive 2011/65/EU without redesign or qualification retest |
| Plastic P-suffix construction | Delivers lower thermal resistance vs. glass-body (G-suffix) variants, improving power handling in compact layouts |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier circuits. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 33 V setpoint for error comparison. Use Value: Maintains ±5% regulation accuracy across 1–135 mA load range and −65°C to +150°C ambient, enabling robust open-loop stability. | Use Scenario: Protecting downstream IC inputs from transient surges exceeding 33 V. IC Role / Device Role / Timing Role: Bidirectional clamping element diverting excess energy to ground when VIN > 33 V + VF. Use Value: Limits peak voltage to ≤33.5 V (at IZM) with 27 Ω dynamic impedance, reducing risk of latch-up or oxide damage. |
| Analog Signal Conditioning | Current Source Biasing |
Use Scenario: Establishing precision bias points in op-amp gain stages or sensor excitation networks. IC Role / Device Role / Timing Role: Low-noise DC reference source for setting common-mode or offset voltages. Use Value: Delivers 33 V reference with <5 μA leakage at 25.1 V, minimizing input bias current errors in high-Z networks. | Use Scenario: Generating stable bias current for LED drivers or transistor amplifiers using constant-current sink topology. IC Role / Device Role / Timing Role: Voltage-controlled current source element via series resistor and fixed VZ. Use Value: Enables 1–135 mA adjustable current with <2% drift over temperature due to predictable VZ tempco and low ZZT. |
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 TR12 tape-and-reel packaging; bulk or ammo pack only | Same electrical specs and DO-41 package; unsuitable for automated pick-and-place | Select 1N4752AP/TR12 for SMT line integration; choose 1N4752A for manual prototyping or low-volume hand assembly |
| MMBZ5255B-TP | Surface-mount SOT-23 package; 33 V ±5%, 200 mW rating; 30 Ω ZZT @ 9.5 mA | Lower power handling and different thermal profile; requires PCB layout change | Choose MMBZ5255B-TP only when board space is constrained and power demand stays below 200 mW |
Compared with 1N4752A and MMBZ5255B-TP, the 1N4752AP/TR12 offers full 1.0 W dissipation in axial-lead format with verified tape-and-reel compatibility, making it optimal for through-hole power references where thermal mass and mechanical robustness are prioritized over footprint size.
Availability
1N4752AP/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and analog signal conditioning applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N4752AP/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for general-purpose, high-stability Zener regulation in commercial and industrial power systems where JEDEC-standard form factor, moisture resilience, and extended temperature operation are required.
FAQ
What is the Zener voltage tolerance of the 1N4752AP/TR12?
The 1N4752AP/TR12 has a nominal Zener voltage of 33 V with a ±5% tolerance, as confirmed by the "A" suffix in its part number per Microsemi's REV C datasheet. This tolerance applies at TL = 25°C and IZT = 7.5 mA. The "P" denotes plastic DO-41 packaging, and "TR12" specifies EIA-296-compliant tape-and-reel packaging for automated assembly.
Does the 1N4752AP/TR12 meet RoHS requirements?
Yes, the 1N4752AP/TR12 is RoHS compliant, as indicated by the "e3" designation in Microsemi's official documentation. Its terminals feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free thermosetting epoxy case meets UL94V-0 flammability standards - all verified in the 10-18-2005 REV C datasheet.
What is the maximum power dissipation for the 1N4752AP/TR12 at 70°C ambient?
At TA = 70°C, the 1N4752AP/TR12 must be derated from its 1.0 W rating at 25°C. Per Figure 1 in the Microsemi datasheet, power dissipation drops to approximately 0.75 W at 70°C ambient on FR4 with standard copper pads. Full 1.0 W operation is only guaranteed at TL < 105°C with 3/8″ lead length - not ambient temperature.
Can the 1N4752AP/TR12 be used as a bidirectional ESD protector?
No - the 1N4752AP/TR12 is a unidirectional Zener diode optimized for reverse-bias regulation. While it conducts forward current ≤1.2 V at 200 mA, it lacks symmetric clamping characteristics, low capacitance (<2 pF), or fast response needed for IEC 61000-4-2 ESD protection. Dedicated TVS diodes like SMAJ33A are appropriate for that function.
What does the "TR12" suffix mean in 1N4752AP/TR12?
The "TR12" suffix indicates EIA-296-compliant tape-and-reel packaging with 12 mm tape width and standard orientation for surface-mount placement equipment. It confirms factory-verified reel integrity, component count accuracy, and compatibility with Fuji, Yamaha, and Universal Instruments pick-and-place systems - distinct from bulk or ammo-pack versions like 1N4752A.
1N4752AP/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:
- ±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)
1N4752AP/TR12 FAQ
1.How can I place an order for 1N4752AP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752AP/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 1N4752AP/TR12 reliable?
The price and inventory of 1N4752AP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752AP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4752AP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752AP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752AP/TR12?
1N4752AP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752AP/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 1N4752AP/TR12?
For technical support, including 1N4752AP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752AP/TR12 requirements.
6.How does Aetrix verify that 1N4752AP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4752AP/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 1N4752AP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4752AP/TR12?
All 1N4752AP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752AP/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 1N4752AP/TR12 part is unused and in its original packaging.
Return procedure for 1N4752AP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752AP/TR12 Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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