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Microchip Technology 1PMT5942B/TR13
- Part No.:
- 1PMT5942B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942B/TR13.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,581
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Product details
Overview
1PMT5942B/TR13 from Microsemi is a 51 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 70 Ω dynamic impedance at 7.3 mA test current and 1100 µA max reverse leakage at 38.8 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5942B/TR13 datasheet, 1PMT5942B/TR13 pinout, 1PMT5942B/TR13 application, or 1PMT5942B/TR13 equivalent, key selection factors include its 51 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, low knee impedance (≤400 Ω), ESD rating >16 kV HBM, and DO-216-compatible mechanical footprint.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction from junction to PCB via TAB 1, achieving 30°C/W junction-to-tab thermal resistance.
The device exhibits low reverse leakage (≤1100 µA at VR = 38.8 V) and stable dynamic impedance (70 Ω at IZT = 7.3 mA), supporting reliable voltage reference performance in industrial power rails and protection circuits where ambient temperatures reach up to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 51 V ±5% at IZT = 7.3 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-power clamping without external heatsink |
| Dynamic Impedance ZZT | 70 Ω at IZT = 7.3 mA - ensures minimal voltage shift under load current variation |
| Reverse Leakage IR | ≤1100 µA at VR = 38.8 V - guarantees low standby power loss in hold-up circuits |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - allows direct thermal path to PCB copper for sustained 3 W operation |
| ESD Rating | >16 kV per HBM - provides robust handling during automated SMT assembly |
| Junction Temp Range | –55°C to +150°C - supports deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package 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-sinking terminal; must be connected to thermal pad on PCB for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1; used for circuit return path |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling traditionally requiring larger through-hole packages |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| ESD robustness >16 kV HBM | Reduces risk of field failure during handling and automated insertion without additional protection circuitry |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Stabilizing 5V or 12V rail references in switching power supplies with wide input transients. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream regulators and microcontrollers. Use Value: Maintains regulation accuracy within ±5% across –55°C to +150°C, with 70 Ω dynamic impedance minimizing output drift under load changes. | Use Scenario: Suppressing load-dump spikes (up to 40 V) on 12 V battery-fed circuits in BCMs. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping surge energy before it reaches CAN transceivers or MCU I/O. Use Value: Absorbs 3.0 W peak power without derating, leveraging TAB 1 thermal path to dissipate energy into chassis ground plane. |
| Programmable Logic Controller (PLC) Input Protection | Medical Diagnostic Equipment Power Monitoring |
Use Scenario: Protecting 24 V digital input channels against ESD and short-circuit faults in factory-floor PLCs. IC Role / Device Role / Timing Role: Primary overvoltage clamp limiting input voltage to safe levels for optocoupler or Schmitt-trigger front-end stages. Use Value: Withstands >16 kV HBM ESD events and maintains ≤1100 µA leakage at 38.8 V, ensuring signal integrity and low false-trip rate. | Use Scenario: Providing stable 51 V reference for analog front-end ADC calibration in portable ultrasound units. IC Role / Device Role / Timing Role: Precision voltage reference source for gain/offset trimming in high-resolution data acquisition paths. Use Value: Delivers 51 V ±5% stability with 70 Ω dynamic impedance, enabling <0.1% reference error contribution in 16-bit ADC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF51A (ON Semiconductor) | Same 51 V nominal, 1.0 W rating, SOD-123 package, 100 Ω Zzt at 5 mA | Lower power handling limits use to sub-1 W clamping; no integral heat sink tab | Select when board space is constrained and thermal load is ≤1 W |
| BZX84-C51 (Diodes Inc.) | 51 V ±5%, 300 mW rating, SOT-23 package, 120 Ω Zzt at 5 mA | Not suitable for 3 W continuous operation; requires external thermal management for transient clamping | Select only for low-power bias/reference roles, not for power rail protection |
Compared with SMF51A and BZX84-C51, the 1PMT5942B/TR13 uniquely delivers 3.0 W dissipation in a surface-mount form with integrated thermal tab-enabling direct replacement of through-hole 1N53xx series in space-constrained industrial designs without PCB redesign.
Availability
1PMT5942B/TR13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control modules, programmable logic controller input protection, and medical diagnostic equipment power monitoring requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5942B/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-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed to replace legacy through-hole Zeners in high-power, thermally demanding applications while maintaining surface-mount manufacturability and automated assembly compatibility.
FAQ
What is the Zener voltage tolerance for 1PMT5942B/TR13?
The 1PMT5942B/TR13 has a standard Zener voltage tolerance of ±5% at 51 V, measured at IZT = 7.3 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base 1PMT5942B/TR13 uses the ±5% grade per MSC0995 Rev F specification.
How is thermal management implemented in the 1PMT5942B/TR13 package?
The 1PMT5942B/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as both cathode and primary thermal conduction path. Its 30°C/W junction-to-TAB thermal resistance enables 3.0 W dissipation when TAB 1 is soldered to a sufficient copper area on the PCB-no external heatsink required.
Can 1PMT5942B/TR13 be used in automotive under-hood applications?
Yes, the 1PMT5942B/TR13 is qualified for operation from –55°C to +150°C junction temperature and features >16 kV HBM ESD rating, making it suitable for under-hood automotive applications such as body control module transient suppression, provided TAB 1 is thermally anchored to meet power dissipation requirements at elevated ambient temperatures.
What is the maximum reverse leakage current for 1PMT5942B/TR13?
The maximum reverse leakage current for 1PMT5942B/TR13 is 1100 µA at VR = 38.8 V, as specified in the MSC0995 datasheet. This value is measured at TL = 30°C and reflects worst-case leakage under pre-breakdown conditions, critical for low-power hold-up and reference stability.
Is the 1PMT5942B/TR13 compatible with standard SMT reflow profiles?
Yes, the 1PMT5942B/TR13 is compatible with standard lead-free reflow profiles. Its molded Powermite® package and full metallic bottom eliminate solder flux entrapment risks, and the device is supplied in EIA-481 tape-and-reel format (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs), supporting high-yield automated placement and reflow processing.
1PMT5942B/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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 38.8 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
1PMT5942B/TR13 FAQ
1.How can I place an order for 1PMT5942B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942B/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 1PMT5942B/TR13 reliable?
The price and inventory of 1PMT5942B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5942B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942B/TR13?
1PMT5942B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942B/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 1PMT5942B/TR13?
For technical support, including 1PMT5942B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942B/TR13 requirements.
6.How does Aetrix verify that 1PMT5942B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942B/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 1PMT5942B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5942B/TR13?
All 1PMT5942B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942B/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 1PMT5942B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5942B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942B/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
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