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Microchip Technology 1PMT5944B/TR13
- Part No.:
- 1PMT5944B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944B/TR13.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,555
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Product details
Overview
1PMT5944B/TR13 from Microsemi is a 62 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 100 Ω dynamic impedance at 6.0 mA test current and 1500 µA max reverse leakage at 47.1 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5944B/TR13 datasheet, 1PMT5944B/TR13 pinout, 1PMT5944B/TR13 application, or 1PMT5944B/TR13 equivalent, key selection criteria include its 62 V nominal zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, DO-216 mechanical outline, and ESD rating >16 kV HBM - critical for rugged industrial power monitoring and automotive body control modules.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range (IZT = 6.0 mA). Its Powermite® package integrates a full metallic bottom and locking tab to ensure low thermal resistance (30°C/W junction-to-TAB1) and reliable solder joint formation without flux entrapment.
The device exhibits low knee impedance (ZZK = 0.25 Ω at IZK = 1 mA) and stable reverse leakage (IR ≤ 1500 µA at VR = 47.1 V), enabling accurate clamping in transient-suppression circuits where predictable turn-on behavior under partial conduction is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at IZT = 6.0 mA, TL = 30°C - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without derating in compact layouts |
| Dynamic Impedance (ZZT) | 100 Ω at IZT = 6.0 mA - ensures minimal voltage shift under load current variation |
| Reverse Leakage (IR) | ≤1500 µA at VR = 47.1 V - guarantees low standby power loss in always-on monitoring circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - supports direct thermal coupling to PCB copper pour for passive cooling |
| ESD Rating | >16 kV per Human Body Model - provides robust handling and system-level ESD immunity without external protection |
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-sinking terminal and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; reverse-biased during Zener operation; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, ensuring void-free thermal interface and long-term reliability |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal path from junction to PCB, reducing thermal resistance to 30°C/W |
| ESD robustness | >16 kV HBM rating enables direct integration into unshielded sensor interfaces and automotive LIN bus nodes |
| Automated assembly compatibility | DO-216 footprint and tape-and-reel packaging (EIA-481, 13-inch reel: 12,000 pcs) support high-speed pick-and-place |
Applications
| Industrial Power Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Real-time DC bus voltage sensing in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and overvoltage fault detection circuitry. Use Value: 62 V clamping with ≤1500 µA leakage ensures accurate 12-bit ADC readings while limiting fault current during transients. | Use Scenario: Overvoltage protection on 12 V battery-supplied microcontroller I/O lines. IC Role / Device Role / Timing Role: Clamp diode safeguarding GPIO pins against load-dump spikes up to 62 V. Use Value: >16 kV HBM rating and 3.0 W dissipation allow direct placement at connector entry points without series resistance. |
| Telecom DC-DC Converter Feedback | Medical Diagnostic Equipment Power Rails |
Use Scenario: Secondary-side voltage regulation feedback in isolated 48 V telecom DC-DC converters. IC Role / Device Role / Timing Role: Precision Zener reference for optocoupler-based feedback loop error amplification. Use Value: 100 Ω dynamic impedance minimizes output voltage drift across line/load variations, maintaining ±1% regulation. | Use Scenario: Input rail conditioning for low-noise analog front-end power in portable ultrasound systems. IC Role / Device Role / Timing Role: Post-regulator clamp protecting LDO inputs from supply overshoot during hot-swap events. Use Value: Metallic-tab thermal path sustains 3.0 W clamping energy without PCB thermal relief, preserving signal integrity in noise-sensitive analog stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF62A (ON Semiconductor) | Same 62 V nominal voltage, but SOD-123 package (lower 1.0 W rating); 100 Ω ZZT at 10 mA; no metallic tab | Limited to lower-energy transients; requires external thermal pad design for >1 W operation | Select when board space is constrained and peak clamping energy ≤1.0 W |
| BZX84-C62 (Diodes Inc.) | SOT-23 package; 62 V ±5%; 300 mW rating; 150 Ω ZZT at 5 mA; no integrated heat sink | Not suitable for sustained 3.0 W dissipation; used only for signal-level clamping or biasing | Select only for low-power bias/reference roles, not for power-rail protection |
Compared with SMF62A and BZX84-C62, the 1PMT5944B/TR13 delivers 3× higher power handling and superior thermal performance via its metallic-tab Powermite® package - essential when clamping repetitive or high-energy transients in industrial or automotive power domains.
Availability
1PMT5944B/TR13 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive body control modules, telecom DC-DC converter feedback, and medical diagnostic equipment power rails requiring stable component supply and long-lifecycle availability.
Supply support for 1PMT5944B/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 engineered for high-power surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding environments - particularly where automated assembly and long-term field reliability are mandatory.
FAQ
What is the maximum power dissipation rating for 1PMT5944B/TR13?
The 1PMT5944B/TR13 is rated for 3.0 W DC power dissipation when TAB 1 is maintained at 60°C. This rating assumes proper thermal coupling of the metallic tab to a PCB copper pour or heatsink. Derating is required above 60°C ambient or if TAB 1 temperature exceeds specification limits. The 30°C/W junction-to-TAB1 thermal resistance enables effective passive cooling in most industrial layouts.
How is the cathode identified on the 1PMT5944B/TR13 package?
The cathode of the 1PMT5944B/TR13 is designated by TAB 1, which is the larger metallic terminal on the Powermite® package. This is confirmed in the mechanical specifications section of the MSC0995.PDF datasheet. TAB 1 must be connected to the more positive potential in reverse-bias Zener operation and serves as the primary thermal path - correct orientation is critical for both electrical function and thermal performance.
What is the reverse leakage current specification for 1PMT5944B/TR13?
The 1PMT5944B/TR13 has a maximum reverse leakage current (IR) of 1500 µA at a reverse voltage (VR) of 47.1 V, measured at TL = 30°C. This value is specified in the Electrical Characteristics table of the MSC0995.PDF datasheet. Lower leakage is typical at voltages below VR, supporting low-quiescent-current designs in battery-powered or always-on monitoring applications.
Is 1PMT5944B/TR13 compatible with standard automated assembly processes?
Yes, the 1PMT5944B/TR13 is fully compatible with automatic insertion and reflow soldering equipment. Its Powermite® package features a DO-216 outline, full metallic bottom to prevent flux entrapment, and is supplied in EIA-481 tape-and-reel format (13-inch reel: 12,000 pieces). These features were explicitly designed to support high-yield, high-speed surface-mount assembly in volume manufacturing environments.
What does the "B" suffix indicate in the 1PMT5944B/TR13 part number?
The "B" suffix in 1PMT5944B/TR13 denotes the standard ±5% tolerance on the nominal 62 V zener voltage, as defined in Note 1 of the MSC0995.PDF datasheet. Tighter tolerances are available with "C" (±2%) and "D" (±1%) suffixes. The "TR13" indicates tape-and-reel packaging on a 13-inch reel - a standard logistics designation unrelated to electrical specification.
1PMT5944B/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):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 47.1 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
1PMT5944B/TR13 FAQ
1.How can I place an order for 1PMT5944B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944B/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 1PMT5944B/TR13 reliable?
The price and inventory of 1PMT5944B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5944B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944B/TR13?
1PMT5944B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944B/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 1PMT5944B/TR13?
For technical support, including 1PMT5944B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944B/TR13 requirements.
6.How does Aetrix verify that 1PMT5944B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944B/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 1PMT5944B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5944B/TR13?
All 1PMT5944B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944B/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 1PMT5944B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5944B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944B/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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