My Inquiry
My Account
Microchip Technology 1PMT5939BE3/TR7
- Part No.:
- 1PMT5939BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5939BE3/TR7.pdf
- Description:
- DIODE ZENER 39V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,705
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5939BE3/TR7 from Microsemi is a 39 V ±5% surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 45 Ω dynamic impedance at 9.6 mA test current and 900 µA max reverse leakage at 1.0 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5939BE3/TR7 datasheet, 1PMT5939BE3/TR7 pinout, 1PMT5939BE3/TR7 application, or 1PMT5939BE3/TR7 equivalent, key selection criteria include its 39 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and temperature shifts. Its Powermite® package integrates a full metallic bottom and locking tab that serve as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer from junction to TAB 1 with 30°C/W thermal resistance.
The device exhibits low knee impedance (≤400 Ω) and tight Zener voltage tolerance (±5% standard), supporting reliable clamping in low-power analog monitoring and DC rail stabilization. Reverse leakage remains ≤900 µA at VR = 1.0 V, ensuring minimal standby current draw in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 39 V ±5% at IZT = 9.6 mA - defines precise clamping threshold for voltage regulation |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust operation without external heatsink in compact layouts |
| Dynamic Impedance ZZT | 45 Ω at IZT = 9.6 mA - ensures minimal voltage shift under load current variation |
| Reverse Leakage IR | ≤900 µA at VR = 1.0 V - reduces quiescent power loss in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - allows direct thermal coupling to PCB copper pour for thermal management |
| ESD Rating | >16 kV per Human Body Model - provides inherent robustness against handling and system-level ESD events |
| Junction Temp Range | –55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
Package: Powermite® (DO-216), surface-mount molded case with full metallic bottom and integral locking tab. Cathode is designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal performance |
| Lead 2 | Anode | Standard anode connection; mounted opposite TAB 1 on DO-216 outline |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability |
| Integral locking tab | Acts as mechanical anchor and thermal interface, enhancing board-level mechanical retention and heat dissipation |
| Automated insertion compatibility | Designed for pick-and-place and reflow processes per EIA-481 tape-and-reel packaging standard |
| Low reverse leakage | ≤900 µA at 1.0 V reverse bias - critical for low-power sensing and battery-backed systems |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference Clamping |
|---|---|
Use Scenario: Stabilizing 3.3 V or 5 V auxiliary rails in programmable logic controllers and motor drive control boards. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream LDOs and microcontrollers. Use Value: Maintains 39 V clamping threshold with ≤45 Ω dynamic impedance, preventing rail collapse during load transients. | Use Scenario: Protecting analog front-end inputs of engine control unit (ECU) sensors from load dump surges. IC Role / Device Role / Timing Role: Transient voltage suppressor placed at sensor signal conditioning stage input. Use Value: Leverages >16 kV HBM ESD rating and 3.0 W power handling to absorb ISO 7637-2 pulse 5a without degradation. |
| Medical Instrumentation Voltage Reference | Telecom Line Card Overvoltage Protection |
Use Scenario: Providing stable bias voltage for precision op-amp stages in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-drift Zener reference source with minimal temperature coefficient impact. Use Value: Achieves ±5% VZ tolerance and –55°C to +150°C operating range for clinical-grade calibration stability. | Use Scenario: Guarding Ethernet PHY interfaces and PoE detection circuitry against induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage TVS architecture before IC-level protection. Use Value: Delivers 3.0 W dissipation capacity and DO-216 footprint compatibility with high-density line card layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5939BTR | Same 39 V ±5%, but in DO-41 through-hole package; no metallic tab or locking feature | Lacks thermal performance and SMT compatibility; requires manual or wave soldering | Select when legacy through-hole assembly or higher surge current margin is required |
| BZX84-C39 | 39 V ±5%, SOT-23 package; 300 mW rating vs. 3.0 W; 90 Ω ZZT at 5 mA | Insufficient power handling for sustained clamping; limited thermal mass | Select only for low-energy signal-level clamping where space is constrained |
Compared with 1N5939BTR and BZX84-C39, the 1PMT5939BE3/TR7 delivers 10× higher power dissipation, integrated thermal management via TAB 1, and EIA-481 tape-and-reel readiness-making it uniquely suited for high-reliability SMT power rail protection.
Availability
1PMT5939BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive sensor clamping, and medical instrumentation voltage reference applications requiring stable component supply and long-term lifecycle support.
Supply support for 1PMT5939BE3/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 diode family was engineered for high-power density surface-mount voltage regulation and transient suppression, targeting applications where thermal performance and automated assembly compatibility are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5939BE3/TR7?
The 1PMT5939BE3/TR7 has a standard Zener voltage tolerance of ±5% at 39 V, measured at 9.6 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the E3/TR7 variant specifies ±5%.
How is thermal management achieved in the 1PMT5939BE3/TR7 package?
The 1PMT5939BE3/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as both cathode and primary thermal path. Its junction-to-TAB 1 thermal resistance is 30°C/W, enabling effective heat transfer to PCB copper when TAB 1 is soldered to an adequate thermal pad.
Is the 1PMT5939BE3/TR7 compatible with automated SMT assembly?
Yes, the 1PMT5939BE3/TR7 is fully compatible with automated SMT assembly. It is supplied in EIA-481 tape-and-reel format (7-inch reel, 3,000 pieces), and its Powermite® package design-including locking tab and flux-free metallic bottom-ensures reliable placement and reflow performance.
What is the maximum reverse leakage current for 1PMT5939BE3/TR7?
The maximum reverse leakage current for 1PMT5939BE3/TR7 is 900 µA at a reverse voltage of 1.0 V and ambient temperature of 30°C. This low leakage supports energy-efficient operation in always-on monitoring and battery-powered systems.
Does 1PMT5939BE3/TR7 meet any ESD immunity standards?
Yes, the 1PMT5939BE3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as confirmed in the Microsemi MSC0995 datasheet. This intrinsic robustness simplifies system-level ESD protection design in sensitive analog and sensor interfaces.
1PMT5939BE3/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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 29.7 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
1PMT5939BE3/TR7 FAQ
1.How can I place an order for 1PMT5939BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5939BE3/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 1PMT5939BE3/TR7 reliable?
The price and inventory of 1PMT5939BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5939BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5939BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5939BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5939BE3/TR7?
1PMT5939BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5939BE3/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 1PMT5939BE3/TR7?
For technical support, including 1PMT5939BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5939BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5939BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5939BE3/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 1PMT5939BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5939BE3/TR7?
All 1PMT5939BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5939BE3/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 1PMT5939BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5939BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5939BE3/TR7 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…
