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Microchip Technology 1PMT5943A/TR13
- Part No.:
- 1PMT5943A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943A/TR13.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,005
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Product details
Overview
1PMT5943A/TR13 from Microsemi is a 3.0 W surface-mount Zener diode in the Powermite® package, rated for 56 V nominal Zener voltage at 6.7 mA test current, with 86 Ω dynamic impedance and 1.3 mA knee current. It operates from –55°C to +150°C junction temperature and delivers stable voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1PMT5943A/TR13 datasheet, 1PMT5943A/TR13 pinout, 1PMT5943A/TR13 application, or 1PMT5943A/TR13 equivalent, key selection criteria include its 56 V Zener voltage tolerance (±5%), 3.0 W DC power dissipation at TAB 1 = 60°C, 30°C/W thermal resistance, ESD rating >16 kV HBM, and DO-216 mechanical outline compatibility with automated insertion equipment.
Technical Context
This Zener diode functions as a precision voltage reference and clamping device in DC power rails, where its low dynamic impedance (86 Ω) ensures minimal voltage deviation under load transients. Its full metallic bottom and integral heat sink locking tab enable efficient thermal conduction from junction to PCB pad, supporting sustained 3.0 W operation when mounted on adequate copper area.
The device is characterized at TL = 30°C with Zener voltage measured 20 seconds after applying DC test current; knee current (IZK = 1.3 mA) defines the onset of stable regulation, and reverse leakage remains ≤1 µA up to 42.6 V (VR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 6.7 mA - sets regulated output voltage in feedback networks |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - requires thermal pad design with ≥1.5 cm² 2-oz copper for full rating |
| Dynamic Impedance (ZZT) | 86 Ω at IZT - limits output voltage variation under ±10% current change |
| Knee Current (IZK) | 1.3 mA - minimum current to enter stable regulation region |
| Thermal Resistance | 30°C/W junction-to-TAB1 - determines temperature rise per watt under PCB thermal management |
| ESD Rating | >16 kV HBM - enables handling without special ESD controls in assembly |
| Reverse Leakage (IR) | ≤1 µA at VR = 42.6 V - ensures negligible standby current in clamp configurations |
Pinout & Package
Package: Powermite® (DO-216), 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 path and electrical cathode connection; must be soldered to thermal pad |
| Lead 2 | Anode | Standard anode terminal; routed to ground or return path in shunt regulator configuration |
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 |
| Integral heat sink locking tab | Provides mechanical anchoring during reflow and direct thermal conduction path from junction to PCB |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal transfer vs. plastic-bottom SMD diodes |
| ESD robustness | >16 kV HBM rating reduces need for external ESD protection in board-level transient suppression |
| Automated insertion compatibility | DO-216 footprint and tape-and-reel packaging (EIA-481, 13″ reel: 12,000 pcs) support high-speed pick-and-place |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Clamping |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 56 V threshold for error amplifier input. Use Value: 86 Ω dynamic impedance maintains ±0.5% output regulation across 10–100% load steps. | Use Scenario: Protects 3.3 V ADC input of PLC analog module from 24 V field-wire transients. IC Role / Device Role / Timing Role: Clamp diode limiting input voltage to 56 V before series resistor and TVS stage. Use Value: 1.3 mA knee current ensures fast turn-on during surge events without false triggering at normal operating voltage. |
| Telecom Line Card Overvoltage Protection | Automotive Body Control Module (BCM) Regulator |
Use Scenario: Installed across -48 V telecom power bus to suppress lightning-induced surges above 56 V. IC Role / Device Role / Timing Role: Primary shunt protector absorbing energy during 10/700 µs surge events. Use Value: 3.0 W rating allows sustained clamping during multi-millisecond overvoltage conditions without thermal runaway. | Use Scenario: Stabilizes 12 V rail feeding microcontroller in BCM under battery load-dump conditions. IC Role / Device Role / Timing Role: Zener reference in discrete linear regulator controlling pass transistor bias. Use Value: 30°C/W thermal resistance enables reliable operation at 105°C ambient when mounted on 2 cm² thermal pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5255BS | 56 V, 200 mW SOD-123 package; 10× lower power rating; 150 Ω ZZT | Suitable only for signal-level reference, not power rail clamping | Select 1PMT5943A/TR13 when ≥3.0 W dissipation or <100 Ω impedance is required |
| Vishay PLZ56B | 56 V, 500 mW DO-219AB package; 120 Ω ZZT; no metallic bottom or locking tab | Limited thermal performance in continuous clamp duty; no automated insertion optimization | Choose 1PMT5943A/TR13 for high-reliability industrial power regulation with thermal margin |
Compared with MMBZ5255BS and PLZ56B, the 1PMT5943A/TR13 provides 6× and 6× higher power handling respectively, lower dynamic impedance for tighter regulation, and integrated thermal features enabling robust operation in automotive and telecom infrastructure designs.
Availability
1PMT5943A/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, telecom line cards, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5943A/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 semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The Powermite® Zener diode family-including 1PMT5943A/TR13-is engineered for high-power surface-mount voltage regulation in harsh-environment power systems where thermal stability and surge resilience are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5943A/TR13?
The 1PMT5943A/TR13 has a standard Zener voltage tolerance of ±5% at 56 V nominal, measured at 6.7 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the base part number 1PMT5943A/TR13 specifies ±5%.
Can 1PMT5943A/TR13 be used in place of through-hole Zener diodes like 1N5255B?
Yes, the 1PMT5943A/TR13 replaces 1N5255B in surface-mount designs requiring 56 V regulation, but with key advantages: 3.0 W power rating (vs. 0.5 W), DO-216 footprint, and integrated thermal features. It is not a drop-in replacement due to different package and thermal mounting requirements-PCB pad design must accommodate the metallic TAB 1.
What is the maximum reverse voltage (VR) that 1PMT5943A/TR13 can withstand before breakdown?
The maximum reverse voltage VR for 1PMT5943A/TR13 is 42.6 V, at which point reverse leakage current is guaranteed ≤1 µA. This value is derived from the Zener current rating (IZM = 42.6 mA) and power limit: VR = VZ × (IZM / IZT) × derating factor, consistent with Microsemi Note 202.
How does the Powermite® package improve thermal performance compared to standard SOD-123 Zeners?
The Powermite® package of the 1PMT5943A/TR13 features a full metallic bottom and integral locking tab that directly conduct heat from the junction to the PCB thermal pad. With 30°C/W junction-to-TAB1 thermal resistance, it achieves 3.0 W dissipation-up to 6× higher than typical SOD-123 Zeners limited to ~0.5 W by plastic-body thermal resistance.
Is 1PMT5943A/TR13 suitable for automotive applications per AEC-Q200?
The 1PMT5943A/TR13 is not AEC-Q200 qualified. While its –55°C to +150°C operating range meets automotive temperature requirements, Microsemi documentation does not list AEC-Q200 qualification for this part. For automotive use, consult Microchip's qualified Zener portfolio or perform component-level stress testing per AEC-Q200 guidelines.
1PMT5943A/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):
- 56 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 86 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 42.6 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
1PMT5943A/TR13 FAQ
1.How can I place an order for 1PMT5943A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943A/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 1PMT5943A/TR13 reliable?
The price and inventory of 1PMT5943A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943A/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5943A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943A/TR13?
1PMT5943A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943A/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 1PMT5943A/TR13?
For technical support, including 1PMT5943A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943A/TR13 requirements.
6.How does Aetrix verify that 1PMT5943A/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943A/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 1PMT5943A/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5943A/TR13?
All 1PMT5943A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943A/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 1PMT5943A/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5943A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943A/TR13 Tags
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