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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1PMT5935E3/TR7

Name: 1PMT5935E3/TR7
Brand: Microchip Technology
SKU: 1PMT5935E3/TR7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1PMT5935E3/TR7

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-216AA

Datasheet:: 1PMT5935E3/TR7.pdf

Description:: DIODE ZENER 27V 3W DO216AA

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Inventory:7,269

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Product details

Overview

1PMT5935E3/TR7 from Microsemi is a 27 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 23 Ω dynamic impedance at 13.9 mA test current and 1 µA max reverse leakage at 20.6 V, used for precision voltage regulation in space-constrained power supply rails.

For engineers reviewing the 1PMT5935E3/TR7 datasheet, 1PMT5935E3/TR7 pinout, 1PMT5935E3/TR7 application, or 1PMT5935E3/TR7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD robustness (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.

Technical Context

This Zener diode operates as a shunt voltage reference with stable breakdown behavior across -55°C to +150°C junction temperature range. Its DO-216 molded package features a full metallic bottom and integral heat-sink locking tab, enabling efficient thermal transfer from junction to TAB 1.

The device exhibits tight regulation at I_ZT = 13.9 mA, with Z_ZT = 23 Ω and Z_ZK = 0.25 Ω at I_ZK = 0.25 mA, supporting low-noise biasing and overvoltage clamping in high-reliability analog and power circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	27 V ±5% at I_ZT = 13.9 mA - defines nominal regulation point with production-grade tolerance
Power Dissipation	3.0 W at TAB 1 = 60°C - sets maximum continuous power handling under defined thermal condition
Dynamic Impedance (Z_ZT)	23 Ω at I_ZT = 13.9 mA - determines output voltage variation under load current changes
Knee Impedance (Z_ZK)	0.25 Ω at I_ZK = 0.25 mA - ensures stable regulation even near minimum operating current
Reverse Leakage (I_R)	≤1 µA at V_R = 20.6 V - guarantees minimal quiescent current in standby/clamp modes
Thermal Resistance	30°C/W junction-to-TAB 1 - quantifies thermal path efficiency for PCB-level heatsinking
ESD Rating	>16 kV per Human Body Model - supports robust handling and operation in unshielded environments

Pinout & Package

Package: Powermite® (DO-216), surface-mount, molded plastic with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1.

Pin/Terminal	Circuit Role	Design Meaning
TAB 1	Cathode	Primary heat-sink interface and electrical cathode connection; must be soldered to copper pour for thermal and electrical performance
Lead 2	Anode	Standard anode terminal; mounted opposite TAB 1 on PCB footprint per DO-216 mechanical drawing

Key Features

Feature	Design Value
Surface-mount Powermite® package	Enables automated placement and reflow while delivering 3 W power handling in footprint smaller than DO-41
Integral heat-sink locking tab	TAB 1 acts as both cathode and primary thermal path, reducing junction-to-PCB thermal resistance to 30°C/W
Full metallic bottom	Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints
ESD robustness	>16 kV HBM rating allows safe handling and operation without external protection in many industrial interfaces

Applications

Industrial Power Supply Regulation	Overvoltage Protection Clamp
Use Scenario: Regulating auxiliary 27 V rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and ADC references. Use Value: ±5% V_Z tolerance and 23 Ω Z_ZT ensure <±0.5 V output deviation across load and temperature.	Use Scenario: Clamping transient surges on 24 V DC fieldbus lines in factory automation systems. IC Role / Device Role / Timing Role: Fast-acting crowbar element diverting excess energy to ground during EFT events. Use Value: 3.0 W power rating and 0.25 Ω Z_ZK enable reliable clamping at sub-millisecond rise times without thermal runaway.
Test Equipment Reference Source	Avionics Sensor Biasing
Use Scenario: Providing calibrated 27 V reference for portable multimeter front-end scaling circuits. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing DAC output buffers and gain-setting networks. Use Value: Low 1 µA I_R at 20.6 V minimizes error contribution in high-impedance reference paths.	Use Scenario: Biasing pressure transducer bridges in certified airborne environmental monitoring units. IC Role / Device Role / Timing Role: Temperature-stable voltage source maintaining bridge excitation within ±0.1% over -55°C to +125°C. Use Value: Junction temperature range (-55°C to +150°C) and 30°C/W thermal resistance support DO-160 compliance.

Industrial Power Supply Regulation

Overvoltage Protection Clamp

Use Scenario: Regulating auxiliary 27 V rail in programmable logic controller (PLC) backplane power distribution.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and ADC references.

Use Value: ±5% V_Z tolerance and 23 Ω Z_ZT ensure <±0.5 V output deviation across load and temperature.

Use Scenario: Clamping transient surges on 24 V DC fieldbus lines in factory automation systems.

IC Role / Device Role / Timing Role: Fast-acting crowbar element diverting excess energy to ground during EFT events.

Use Value: 3.0 W power rating and 0.25 Ω Z_ZK enable reliable clamping at sub-millisecond rise times without thermal runaway.

Test Equipment Reference Source

Avionics Sensor Biasing

Use Scenario: Providing calibrated 27 V reference for portable multimeter front-end scaling circuits.

IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing DAC output buffers and gain-setting networks.

Use Value: Low 1 µA I_R at 20.6 V minimizes error contribution in high-impedance reference paths.

Use Scenario: Biasing pressure transducer bridges in certified airborne environmental monitoring units.

IC Role / Device Role / Timing Role: Temperature-stable voltage source maintaining bridge excitation within ±0.1% over -55°C to +125°C.

Use Value: Junction temperature range (-55°C to +150°C) and 30°C/W thermal resistance support DO-160 compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5354B	Same 27 V nominal, but DO-15 package; 1.0 W rating; Z_ZT = 1.5 Ω at 120 mA; no metallic bottom	Limited to lower-power applications; requires larger PCB area; lacks integrated heatsink tab	Select when cost sensitivity outweighs thermal performance and board space constraints
BZX84-C27	SOT-23 package; 27 V ±5%; 300 mW rating; Z_ZT = 35 Ω at 5 mA; thermal resistance ~250°C/W	Suitable only for signal-level biasing; not rated for sustained 3 W dissipation	Choose for ultra-compact low-power designs where thermal management is handled externally

Compared with 1PMT5935E3/TR7, the 1N5354B offers tighter Z_ZT but sacrifices 3× power handling and thermal efficiency, while the BZX84-C27 trades size for drastically reduced power capability and thermal performance-making 1PMT5935E3/TR7 the sole option for regulated 27 V/3 W SMT applications requiring robust thermal design.

Availability

1PMT5935E3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, precision test equipment, and avionics sensor biasing requiring stable component supply and long-lifecycle support.

Supply support for 1PMT5935E3/TR7 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 radiation-hardened components for aerospace, defense, and industrial markets.

The Powermite® Zener series was designed specifically for high-power-density surface-mount voltage regulation and clamping in mission-critical systems where thermal performance, ESD immunity, and automated assembly compatibility are essential.

FAQ

What is the zener voltage tolerance of the 1PMT5935E3/TR7?

The 1PMT5935E3/TR7 has a standard zener voltage tolerance of ±5% at 27 V, measured at I_ZT = 13.9 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the E3/TR7 variant uses the standard ±5% grade per MSC0995 Rev F documentation.

How is thermal management implemented in the 1PMT5935E3/TR7 package?

The 1PMT5935E3/TR7 uses a Powermite® package with TAB 1 serving as both cathode and primary thermal interface. Its 30°C/W junction-to-TAB thermal resistance requires direct soldering of TAB 1 to a copper pour for effective heat dissipation. The full metallic bottom and locking tab eliminate flux traps and enhance thermal conduction versus standard plastic SMD packages.

What is the maximum reverse leakage current for the 1PMT5935E3/TR7?

The 1PMT5935E3/TR7 specifies a maximum reverse leakage current (I_R) of 1 µA at V_R = 20.6 V, measured at T_L = 30°C. This low leakage ensures minimal loading on high-impedance bias networks and supports stable operation in precision analog circuits where quiescent current must be tightly controlled.

Is the 1PMT5935E3/TR7 compatible with automated SMT assembly processes?

Yes, the 1PMT5935E3/TR7 is fully compatible with automated insertion and reflow processes. It ships in EIA-481-compliant tape-and-reel format (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs) and features a unique locking tab that aids pick-and-place stability. Its full metallic bottom prevents solder flux entrapment, ensuring consistent joint quality during reflow.

What is the ESD rating of the 1PMT5935E3/TR7 and how is it verified?

The 1PMT5935E3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as stated in the MSC0995 datasheet. This rating reflects intrinsic device robustness and is verified per ANSI/ESDA/JEDEC JS-001 test methodology, making external ESD protection unnecessary in many industrial control and instrumentation applications.

1PMT5935E3/TR7 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-216AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 27 V

Tolerance:: ±20%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 23 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 20.6 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-216AA

1PMT5935E3/TR7 FAQ

1.How can I place an order for 1PMT5935E3/TR7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1PMT5935E3/TR7 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 1PMT5935E3/TR7 reliable?

The price and inventory of 1PMT5935E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5935E3/TR7 is usually 5 days.

3.What payment methods are accepted for 1PMT5935E3/TR7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5935E3/TR7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1PMT5935E3/TR7?

1PMT5935E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1PMT5935E3/TR7 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 1PMT5935E3/TR7?

For technical support, including 1PMT5935E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5935E3/TR7 requirements.

6.How does Aetrix verify that 1PMT5935E3/TR7 is sourced from the original manufacturer or authorized distributors?

All 1PMT5935E3/TR7 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 1PMT5935E3/TR7 meets industry standards.

7.What is the process for return or replacement of 1PMT5935E3/TR7?

All 1PMT5935E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5935E3/TR7, 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 1PMT5935E3/TR7 part is unused and in its original packaging.

Return procedure for 1PMT5935E3/TR7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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