My Inquiry
My Account
Microchip Technology 1PMT5940E3/TR7
- Part No.:
- 1PMT5940E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940E3/TR7.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,856
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5940E3/TR7 from Microsemi is a 43 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 temperature of 60°C, with dynamic impedance of 53 Ω at 8.7 mA test current and reverse leakage ≤1 µA at 32.7 V, used for precision voltage regulation in space-constrained power supply rails.
For engineers reviewing the 1PMT5940E3/TR7 datasheet, 1PMT5940E3/TR7 pinout, 1PMT5940E3/TR7 application, or 1PMT5940E3/TR7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB1), 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 two-terminal voltage reference device with cathode designated by TAB 1, designed for stable DC voltage clamping and regulation in high-reliability power circuits. Its full metallic bottom eliminates solder flux entrapment, and integral locking tab serves as both mechanical anchor and heat sink path.
The device exhibits tight voltage regulation across its operating range: zener voltage is specified at 43 V ±5% measured at 8.7 mA (IZT) with TAB 1 held at 30°C, and maintains low reverse leakage (≤1 µA at VR = 32.7 V), enabling use in low-power standby and sensing applications where leakage-induced error must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZT = 8.7 mA, TL = 30°C - defines nominal regulation point with production tolerance band |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling under defined thermal condition |
| Dynamic Impedance (ZZT) | 53 Ω at IZT = 8.7 mA - small-signal AC resistance affecting regulation stability under load transients |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 0.25 mA - low-voltage impedance near breakdown onset, critical for low-current regulation fidelity |
| Reverse Leakage (IR) | ≤1 µA at VR = 32.7 V - ensures minimal parasitic current in off-state, preserving battery life in low-power systems |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency from active region to mounting tab for thermal design |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and operation in electrostatic-sensitive environments |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode designated by TAB 1; weight ≈0.016 g; compatible with EIA-481 tape-and-reel (7″ reel: 3,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be thermally anchored to PCB copper for rated power dissipation |
| Lead 2 | Anode | Current entry point during forward bias; reverse-biased operation establishes zener regulation between Lead 2 and TAB 1 |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling previously requiring larger through-hole packages |
| Full metallic bottom | Prevents solder flux entrapment during reflow, eliminating post-assembly cleaning and reliability risks from residual contaminants |
| Integral locking tab | Acts as mechanical retention feature during insertion and provides direct thermal conduction path from junction to PCB |
| ESD robustness | >16 kV HBM rating allows safe handling and integration into unshielded industrial control and telecom interfaces without added protection circuitry |
Applications
| Industrial Power Supply Regulation | Automotive ECUs |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loops in isolated DC-DC converters supplying microcontrollers and sensors. IC Role / Device Role / Timing Role: Zener diode providing precise 43 V clamp for optocoupler-based secondary-side regulation. Use Value: Maintains ±5% output voltage accuracy over temperature and line variations due to low dynamic impedance (53 Ω) and tight tolerance. | Use Scenario: Overvoltage protection and voltage clamping on 12 V/24 V battery-supplied sensor interface lines. IC Role / Device Role / Timing Role: Transient voltage suppressor and reference element for analog front-end comparators monitoring supply rail integrity. Use Value: Withstands >16 kV ESD events and limits reverse leakage to ≤1 µA at 32.7 V, preventing false triggers in safety-critical diagnostics. |
| Telecom Line Card Protection | Test & Measurement Equipment |
Use Scenario: Protecting sensitive analog inputs on line cards from induced surges and switching transients on -48 V DC distribution buses. IC Role / Device Role / Timing Role: Primary clamping device shunting excess energy to ground via TAB 1, leveraging 3.0 W power rating and 30°C/W thermal resistance. Use Value: Full metallic bottom ensures reliable thermal transfer to heatsink pads, sustaining repeated surge events without parametric shift. | Use Scenario: Precision voltage reference in portable multimeters and calibration sources requiring stable 43 V node. IC Role / Device Role / Timing Role: Two-terminal passive reference establishing known potential for ADC reference dividers and DAC output scaling. Use Value: Low knee impedance (0.25 Ω) ensures stable regulation even at sub-mA bias currents, critical for ultra-low-power measurement modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same 43 V nominal zener voltage, but DO-41 through-hole package; higher thermal resistance (~65°C/W); no metallic bottom or locking tab | Requires manual or wave-solder assembly; unsuitable for high-density SMT layouts or automated production | Select when legacy through-hole compatibility or higher single-pulse surge rating is prioritized over board space and thermal performance |
| BZX84-C43 | SOT-23 package; lower 350 mW power rating; zener tolerance ±5% but dynamic impedance ~90 Ω at 5 mA; no specified ESD rating | Limited to low-power signal-level clamping; cannot sustain 3.0 W continuous dissipation or meet >16 kV ESD requirements | Select only for cost-sensitive, low-power consumer applications where thermal and ESD margins are non-critical |
Compared with 1N5357B and BZX84-C43, the 1PMT5940E3/TR7 delivers superior thermal management (30°C/W vs. 65°C/W or undefined), robust SMT manufacturability, and certified ESD immunity-making it the preferred choice for industrial and automotive power regulation where reliability and density are essential.
Availability
1PMT5940E3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, and telecom infrastructure equipment requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for 1PMT5940E3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode product line was engineered to deliver high-power surface-mount voltage regulation in compact form factors, targeting applications demanding rugged thermal performance, automated assembly compatibility, and ESD-hardened operation.
FAQ
What is the zener voltage tolerance for 1PMT5940E3/TR7?
The 1PMT5940E3/TR7 has a standard zener voltage tolerance of ±5% at 43 V, measured at 8.7 mA test current with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the E3/TR7 variant specifies ±5%. This tolerance directly impacts regulation accuracy in feedback networks and reference circuits using the 1PMT5940E3/TR7.
How is thermal performance characterized for 1PMT5940E3/TR7?
The 1PMT5940E3/TR7 features a junction-to-TAB1 thermal resistance of 30°C/W, meaning each watt of dissipated power raises the junction temperature 30°C above the TAB 1 temperature. This value assumes proper thermal anchoring of TAB 1 to PCB copper. At 60°C TAB temperature, the device sustains its full 3.0 W rating-critical for thermal design validation of the 1PMT5940E3/TR7 in power supply applications.
Is 1PMT5940E3/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5940E3/TR7 is fully compatible with automated surface-mount insertion equipment. Its Powermite® package includes a unique locking tab that aids orientation and retention during placement, and its full metallic bottom prevents solder flux entrapment during reflow. It ships in EIA-481 tape-and-reel format (3,000 pcs per 7″ reel), ensuring seamless integration into high-volume SMT lines using the 1PMT5940E3/TR7.
What is the maximum reverse leakage current for 1PMT5940E3/TR7?
The maximum reverse leakage current for 1PMT5940E3/TR7 is 1 µA at a reverse voltage (VR) of 32.7 V, tested at TL = 30°C. This low leakage ensures minimal quiescent current draw in standby or battery-powered circuits where the 1PMT5940E3/TR7 serves as a voltage reference or clamp, preserving system energy budget without compromising regulation fidelity.
Does 1PMT5940E3/TR7 have an ESD rating, and what standard does it meet?
Yes, the 1PMT5940E3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as confirmed in the official Microsemi datasheet MSC0995. This rating enables robust handling during manufacturing and reliable operation in electrically noisy environments such as automotive and industrial settings-making the 1PMT5940E3/TR7 suitable for applications where transient immunity is critical without external protection components.
1PMT5940E3/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):
- 43 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 53 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 32.7 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
1PMT5940E3/TR7 FAQ
1.How can I place an order for 1PMT5940E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940E3/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 1PMT5940E3/TR7 reliable?
The price and inventory of 1PMT5940E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5940E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940E3/TR7?
1PMT5940E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940E3/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 1PMT5940E3/TR7?
For technical support, including 1PMT5940E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5940E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940E3/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 1PMT5940E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5940E3/TR7?
All 1PMT5940E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940E3/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 1PMT5940E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5940E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940E3/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…
