My Inquiry
My Account
Microchip Technology 1PMT5940BE3/TR13
- Part No.:
- 1PMT5940BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940BE3/TR13.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,249
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5940BE3/TR13 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 = 60°C, with 53 Ω dynamic impedance at 8.7 mA test current and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5940BE3/TR13 datasheet, 1PMT5940BE3/TR13 pinout, 1PMT5940BE3/TR13 application, or 1PMT5940BE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, power derating above 60°C, knee current (0.25 mA), reverse leakage (<1 µA at 32.7 V), and ESD rating (>16 kV HBM).
Technical Context
This device operates as a single-junction, silicon planar Zener diode optimized for stable voltage regulation under DC bias. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical retention during reflow soldering.
Electrical behavior is defined at TL = 30°C with specified test conditions: VZ measured at IZT = 8.7 mA, ZZT derived using 10% AC superimposition on IZT, and IR max guaranteed at VR = 32.7 V - all consistent with Microsemi's standard Zener characterization methodology per Micro Note 202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 43 V ±5% at IZT = 8.7 mA - defines nominal clamping/reference level with predictable deviation across temperature |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power handling before thermal shutdown or degradation |
| Dynamic Impedance | 53 Ω at IZT - determines output voltage variation under load current changes; lower values improve regulation stability |
| Knee Current | 0.25 mA - minimum current required to enter regulated Zener region; critical for low-power bias applications |
| Reverse Leakage | <1 µA at VR = 32.7 V - ensures minimal standby current in high-impedance sensing or battery-backed circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - enables accurate junction temperature estimation from tab temperature measurement |
| ESD Rating | >16 kV HBM - provides robustness against handling-induced electrostatic discharge without external protection |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; DO-216 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be thermally anchored to PCB copper for rated power dissipation |
| Lead 2 | Anode | Standard anode connection; polarity confirmed by cathode marking on package body adjacent to TAB 1 |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning requirements |
| Integral heat sink locking tab | Provides mechanical retention and direct thermal path from junction to PCB, enabling 3.0 W operation without external heatsink |
| ESD rating >16 kV HBM | Reduces need for upstream ESD protection components in board-level designs handling human interaction or unshielded interfaces |
| Compatible with automatic insertion equipment | Supports high-volume SMT assembly with standard pick-and-place systems, minimizing placement misalignment risk |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp in DC-DC Converters |
|---|---|
Use Scenario: Stable 43 V reference in isolated flyback feedback networks or linear regulator error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing precise, temperature-compensated voltage threshold for error signal generation. Use Value: ±5% tolerance and 53 Ω dynamic impedance ensure <±0.5 V output variation across line/load transients in 12–48 V input systems. | Use Scenario: Clamping gate drive voltage spikes in MOSFET-based synchronous buck converters operating up to 48 V input. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting gate-source voltage to safe levels during switching transitions. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping of 100 ns–1 µs spikes without thermal runaway. |
| Industrial Sensor Signal Conditioning | ESD-Protected I/O Interface Protection |
Use Scenario: Biasing and level-shifting analog sensor outputs (e.g., RTD bridges) in 24 V industrial PLC modules. IC Role / Device Role / Timing Role: Precision Zener establishing stable bias point for op-amp input stages exposed to 0–24 V common-mode range. Use Value: Low reverse leakage (<1 µA) prevents loading of high-impedance sensor nodes; 0.25 mA knee current supports microamp-level bias networks. | Use Scenario: Front-end protection for RS-485 transceivers connected to field wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element shunting ESD events (>16 kV HBM) before they reach sensitive transceiver inputs. Use Value: >16 kV HBM rating eliminates need for additional TVS diodes in Class A/B industrial interface designs per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ43A | TVS diode (not Zener); 43 V standoff, 600 W peak pulse power, higher capacitance (~200 pF) | Designed for transient suppression only; not suitable for DC voltage reference or biasing | Select only for surge/ESD clamping where DC regulation is not required |
| BZX84-C43 | SOT-23 package; 43 V ±5%, 300 mW power rating, 90 Ω dynamic impedance at 5 mA | Limited to low-power biasing due to 0.3 W rating; unsuitable for 3 W thermal management scenarios | Choose when board space is constrained and power dissipation remains below 300 mW |
Compared with SMCJ43A and BZX84-C43, the 1PMT5940BE3/TR13 uniquely delivers 3.0 W DC power handling in a surface-mount Zener configuration with validated thermal performance via TAB 1 mounting - making it irreplaceable for high-stability, medium-power voltage reference and clamping roles where both precision and thermal robustness are required.
Availability
1PMT5940BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, DC-DC converter protection, sensor biasing circuits, and ESD-hardened I/O interfaces requiring stable component supply and traceable sourcing.
Supply support for 1PMT5940BE3/TR13 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-tolerant components for aerospace, defense, and industrial markets.
The Powermite® Zener series, including 1PMT5940BE3/TR13, was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding environments - particularly where automatic assembly and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance for 1PMT5940BE3/TR13?
The 1PMT5940BE3/TR13 has a standard Zener voltage tolerance of ±5% at 43 V, measured at IZT = 8.7 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available under suffixes C and D respectively, but the E3/TR13 variant specifies ±5%. This tolerance directly impacts regulation accuracy in reference and clamp applications.
Can 1PMT5940BE3/TR13 be used in place of through-hole Zener diodes like 1N5257B?
No - the 1PMT5940BE3/TR13 is not a drop-in replacement for 1N5257B. While both are 43 V Zeners, the 1PMT5940BE3/TR13 is rated for 3.0 W at TAB 1 = 60°C and uses a Powermite® surface-mount package with thermal design centered on TAB 1, whereas 1N5257B is a 0.5 W through-hole device in DO-35. PCB layout, thermal management, and power derating curves differ significantly.
What is the maximum reverse voltage that can be continuously applied to 1PMT5940BE3/TR13 without breakdown?
The maximum reverse voltage that can be continuously applied to 1PMT5940BE3/TR13 without entering Zener conduction is 32.7 V - this is the VR rating listed in the datasheet. Applying ≥43 V will initiate controlled Zener breakdown; operation between 32.7 V and 43 V risks unstable leakage or premature wear depending on duration and temperature.
How does the Powermite® package improve thermal performance compared to standard SOD-123?
The Powermite® package of 1PMT5940BE3/TR13 improves thermal performance via its full metallic bottom and integral locking tab, achieving 30°C/W junction-to-TAB1 thermal resistance - significantly lower than typical SOD-123 Zeners (≈100–150°C/W). This allows 1PMT5940BE3/TR13 to dissipate 3.0 W continuously when TAB 1 is properly thermally anchored, unlike SOD-123 devices limited to ~0.5–1.0 W.
Is 1PMT5940BE3/TR13 suitable for use in automotive applications?
The 1PMT5940BE3/TR13 meets AEC-Q200 stress testing requirements for passive components and operates across –55°C to +150°C junction temperature range, making it suitable for under-hood automotive applications such as engine control module voltage references or infotainment system ESD protection - provided board-level thermal design maintains TAB 1 ≤60°C under worst-case ambient and power conditions.
1PMT5940BE3/TR13 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:
- ±5%
- 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
1PMT5940BE3/TR13 FAQ
1.How can I place an order for 1PMT5940BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940BE3/TR13 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 1PMT5940BE3/TR13 reliable?
The price and inventory of 1PMT5940BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5940BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940BE3/TR13?
1PMT5940BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940BE3/TR13 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 1PMT5940BE3/TR13?
For technical support, including 1PMT5940BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940BE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5940BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940BE3/TR13 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 1PMT5940BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5940BE3/TR13?
All 1PMT5940BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940BE3/TR13, 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 1PMT5940BE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5940BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940BE3/TR13 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…
