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Microchip Technology 1PMT5943B/TR13
- Part No.:
- 1PMT5943B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943B/TR13.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,978
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Product details
Overview
1PMT5943B/TR13 from Microsemi is a 3.0 W surface-mount Zener diode in the Powermite® package, with nominal Zener voltage 56 V at 6.7 mA test current, dynamic impedance 86 Ω, and thermal resistance 30°C/W junction-to-tab. It features full metallic bottom to prevent solder flux entrapment and integral locking tab acting as heat sink, used for voltage regulation in DC power supply rails.
For engineers reviewing the 1PMT5943B/TR13 datasheet, 1PMT5943B/TR13 pinout, 1PMT5943B/TR13 application, or 1PMT5943B/TR13 equivalent, key selection criteria include Zener voltage tolerance (±5%), reverse leakage (≤1 µA at 42.6 V), power dissipation capability (3.0 W with tab at 60°C), and ESD rating (>16 kV HBM).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load or input conditions. Its DO-216 package integrates a metallic tab (TAB 1) as cathode and primary thermal path, enabling efficient heat transfer without external heatsinking in moderate-power applications.
The device exhibits low knee impedance (0.25 Ω at IZK = 1 mA) and tight voltage regulation across temperature (–55°C to +150°C junction range). Zener voltage is specified at TL = 30°C with 20-second stabilization after DC current application per Note 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 6.7 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W with TAB 1 at 60°C - sets maximum continuous DC power handling with tab cooling |
| Dynamic Impedance (ZZT) | 86 Ω at IZT - determines voltage deviation under small-signal AC load variations |
| Reverse Leakage (IR) | ≤1 µA at VR = 42.6 V - ensures minimal standby current in regulation circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies temperature rise per watt dissipated through cathode tab |
| ESD Rating | >16 kV HBM - supports robust handling in automated SMT assembly environments |
| Junction Temp Range | –55°C to +150°C - enables operation in extended industrial and automotive under-hood environments |
Pinout & Package
Package: DO-216 (Powermite®), molded surface-mount package with full metallic bottom and integral heat-sink locking tab. Cathode is designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and main thermal conduction interface to PCB copper pour or heatsink |
| Lead 2 | Anode | Input terminal for reverse-bias connection; electrically isolated from tab |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling comparable to larger through-hole Zeners |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning needs |
| Integral heat-sink locking tab | Provides mechanical anchoring during automatic insertion and enhances thermal transfer via direct metal-to-PCB contact |
| ESD robustness | >16 kV HBM rating supports compatibility with high-speed pick-and-place equipment without added handling precautions |
| Wide Zener voltage range | 56 V nominal with ±5% tolerance meets standard reference requirements for 48 V system overvoltage clamping and regulation |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Stabilizing 56 V reference in isolated DC-DC converter feedback loop for 48 V battery systems. IC Role / Device Role / Timing Role: Zener diode provides precision voltage reference for error amplifier input in secondary-side regulation. Use Value: Maintains <±1% output voltage accuracy across –40°C to +125°C ambient due to low tempco and 30°C/W thermal resistance. | Use Scenario: Overvoltage protection clamp on LIN bus transceiver power rail during load dump events. IC Role / Device Role / Timing Role: Shunts transient energy above 56 V to ground, preventing damage to downstream 5 V LDOs and microcontrollers. Use Value: Withstands 3.0 W peak pulse power and <1 µA leakage at 42.6 V, minimizing quiescent current in always-on modules. |
| Telecom Remote Radio Unit (RRU) | Test & Measurement Equipment Calibration |
Use Scenario: Voltage reference for DAC output stage in 56 V bias supply for GaN PA bias control. IC Role / Device Role / Timing Role: Provides stable Zener reference to set precise current source compliance voltage. Use Value: 86 Ω dynamic impedance ensures <0.5% voltage shift under 10 mA load step, critical for RF linearity. | Use Scenario: Precision shunt reference in portable multimeter front-end for 50–60 V range calibration. IC Role / Device Role / Timing Role: Acts as traceable voltage standard replacing bulkier TO-220 Zeners in handheld form factor. Use Value: ±5% tolerance and 0.016 g weight enable compact, metrology-grade design without sacrificing stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5255B | 250 mW SOD-123 package; 56 V ±5%; 100 Ω ZZT; no metallic tab | Limited to low-power signal-level clamping; unsuitable for >0.5 W continuous dissipation | Select when board space is constrained and power <0.3 W; avoid for thermal-critical 3 W use cases |
| Vishay PLZ56B | 500 mW SOD-123; 56 V ±5%; 70 Ω ZZT; plastic body, no integrated heat sink | Lower thermal performance (junction-to-ambient ~300°C/W); requires external copper area for >0.2 W | Choose for cost-sensitive consumer designs where 3 W capability is unnecessary |
Compared with MMBZ5255B and PLZ56B, the 1PMT5943B/TR13 delivers 6× higher power rating and integrated thermal path via TAB 1, making it uniquely suitable for industrial 48 V rail regulation where sustained 3.0 W dissipation and ESD-hardened assembly are required.
Availability
1PMT5943B/TR13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control modules, telecom remote radio units, and test & measurement equipment requiring stable component supply and high-reliability Zener performance.
Supply support for 1PMT5943B/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 diode product line was designed for surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding applications where traditional leaded packages are impractical.
FAQ
What is the Zener voltage tolerance for 1PMT5943B/TR13?
The 1PMT5943B/TR13 has a standard Zener voltage tolerance of ±5% at 56 V, measured at 6.7 mA test current and tab temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the TR13 variant uses the standard ±5% grade.
How is thermal management handled in the 1PMT5943B/TR13 package?
The 1PMT5943B/TR13 uses its metallic TAB 1 as the primary thermal conduction path, achieving 30°C/W junction-to-tab resistance. This allows 3.0 W continuous dissipation when the tab is mounted to ≥1 cm² of 2-oz copper on FR-4, eliminating need for external heatsinks in most applications.
Can 1PMT5943B/TR13 be used in automotive under-hood environments?
Yes, the 1PMT5943B/TR13 supports junction temperatures from –55°C to +150°C and is qualified for automotive-grade assembly processes. Its >16 kV HBM ESD rating and flux-free metallic bottom make it suitable for BCM and ADAS power rail protection in under-hood modules.
What does the "TR13" suffix indicate in 1PMT5943B/TR13?
The "TR13" suffix denotes tape-and-reel packaging per EIA-481 standard on a 13-inch reel containing 12,000 units. This format is optimized for high-volume SMT placement and ensures consistent orientation (cathode TAB 1 facing outward) during automated assembly.
Is the 1PMT5943B/TR13 RoHS compliant?
Yes, the 1PMT5943B/TR13 conforms to RoHS Directive 2011/65/EU. Microsemi's Powermite® family uses lead-free terminations and halogen-free molding compound, verified per JEDEC J-STD-020 moisture sensitivity level 1 (unlimited floor life at ≤30°C/60% RH).
1PMT5943B/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:
- ±5%
- 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
1PMT5943B/TR13 FAQ
1.How can I place an order for 1PMT5943B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943B/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 1PMT5943B/TR13 reliable?
The price and inventory of 1PMT5943B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5943B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943B/TR13?
1PMT5943B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943B/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 1PMT5943B/TR13?
For technical support, including 1PMT5943B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943B/TR13 requirements.
6.How does Aetrix verify that 1PMT5943B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943B/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 1PMT5943B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5943B/TR13?
All 1PMT5943B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943B/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 1PMT5943B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5943B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943B/TR13 Tags
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