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Microchip Technology 1PMT5946B/TR13
- Part No.:
- 1PMT5946B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946B/TR13.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
1PMT5946B/TR13 from Microsemi is a 75 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 140 Ω dynamic impedance at 5.0 mA test current and 2000 µA max reverse leakage at 56 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5946B/TR13 datasheet, 1PMT5946B/TR13 pinout, 1PMT5946B/TR13 application, or 1PMT5946B/TR13 equivalent, key selection criteria include its 75 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 robust industrial power management designs.
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 (TAB 1) as both cathode terminal and thermal path, enabling 30°C/W junction-to-tab thermal resistance and eliminating solder flux entrapment during reflow.
The device exhibits low knee impedance (ZZK = 0.25 Ω) and stable dynamic impedance (ZZT = 140 Ω at IZT = 5.0 mA), supporting consistent regulation under varying load conditions. Reverse leakage remains ≤2000 µA up to 56 V, ensuring minimal standby power loss in clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 5.0 mA - defines precise clamping/reference level in feedback or protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance (ZZT) | 140 Ω at IZT = 5.0 mA - ensures minimal output voltage variation under current transients |
| Reverse Leakage (IR) | ≤2000 µA at VR = 56 V - guarantees low quiescent current in always-on protection paths |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal coupling to PCB copper for passive cooling |
| ESD Rating | >16 kV per HBM - provides intrinsic robustness against handling and system-level electrostatic discharge |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 0.25 mA - supports stable regulation even near breakdown threshold |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom (TAB 1) serving as cathode and primary thermal interface. Dimensions conform to Microsemi mechanical drawing MSC0995, all tolerances ±0.005 inches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and thermal conduction node; must be soldered to ≥1 cm² copper pour for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; polarity marked by TAB 1 designation on package body |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Mechanical tab on TAB 1 enhances thermal transfer and prevents package rotation during automated placement |
| Full metallic bottom | Eliminates solder flux entrapment risk and ensures repeatable thermal performance across reflow cycles |
| Automatic insertion compatibility | DO-216 footprint and weight (0.016 g) optimized for high-speed pick-and-place equipment |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) - supports precision reference designs without external trimming |
Applications
| Industrial Power Supply Clamping | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Protecting 72 V battery-derived DC rails in motor control inverters from load-dump transients. IC Role / Device Role / Timing Role: Zener diode clamping element absorbing surge energy above 75 V threshold. Use Value: 3.0 W power rating and 30°C/W thermal resistance enable single-device transient suppression without derating at 85°C ambient. | Use Scenario: Providing stable 75 V reference for isolated feedback in 48 V–72 V automotive DC-DC converters. IC Role / Device Role / Timing Role: Precision voltage reference in optocoupler feedback loop of flyback controller. Use Value: ±5% VZ tolerance and low ZZT ensure <±0.5 V regulation error across temperature and line variations. |
| Telecom Line Card Protection | Renewable Energy Charge Controller |
Use Scenario: Overvoltage protection on -48 V telecom distribution bus against lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping diode (with series resistor) limiting bus voltage excursion. Use Value: >16 kV HBM ESD rating and 2000 µA IR at 56 V prevent false triggering while maintaining low standby loss. | Use Scenario: Regulating gate drive voltage for high-side MOSFETs in solar MPPT controllers operating up to 100 V input. IC Role / Device Role / Timing Role: Zener-based voltage shunt regulating auxiliary supply rail. Use Value: Stable 75 V regulation at IZK = 0.25 mA enables reliable startup and biasing under partial illumination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ75A | TVS diode (not Zener); 75 V standoff, 1500 W peak pulse power, higher leakage (>50 µA @ 61.2 V) | Designed for transient suppression only; not suitable for continuous voltage regulation | Select only for surge-only protection; avoid where DC regulation or low IR is required |
| BZX84-C75 | SOT-23 package; 75 V ±5%, 300 mW power, 500 Ω ZZT, no metallic thermal tab | Limited to low-power references; cannot dissipate 3.0 W without external heatsink | Use only in space-constrained, low-current (<5 mA) reference circuits |
Compared with SMCJ75A and BZX84-C75, the 1PMT5946B/TR13 uniquely combines 75 V regulation, 3.0 W continuous dissipation, and integrated thermal management - making it the only choice for high-reliability, high-power Zener applications requiring stable DC clamping or referencing.
Availability
1PMT5946B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom line cards, and renewable energy charge controllers requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5946B/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 family, including 1PMT5946B/TR13, was engineered for high-power surface-mount voltage regulation in harsh-environment systems where thermal performance and long-term stability are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5946B/TR13?
The 1PMT5946B/TR13 has a standard Zener voltage tolerance of ±5% at 75 V, measured at IZT = 5.0 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request but are not applicable to the base 1PMT5946B/TR13 marking.
How is thermal management handled in the 1PMT5946B/TR13 package?
The 1PMT5946B/TR13 uses its metallic TAB 1 as both cathode and primary thermal interface, achieving 30°C/W junction-to-tab thermal resistance. For full 3.0 W operation, TAB 1 must be soldered to ≥1 cm² of 2-oz copper on the PCB - no additional heatsink is required when this layout rule is followed.
Can 1PMT5946B/TR13 be used in place of a through-hole 1N5364B?
No - although both are 75 V Zeners, the 1PMT5946B/TR13 is a surface-mount Powermite® device with DO-216 footprint and TAB 1 cathode, whereas the 1N5364B is axial-lead DO-201AD. Their packages, thermal paths, and mounting methods are incompatible; board redesign is required for substitution.
What is the maximum reverse voltage before significant leakage in 1PMT5946B/TR13?
The 1PMT5946B/TR13 specifies ≤2000 µA reverse leakage at VR = 56 V. Below this voltage, leakage remains negligible (typically <1 µA). Operation above 56 V enters the Zener breakdown region, where current increases sharply - intended behavior for regulation/clamping, not leakage.
Is 1PMT5946B/TR13 compatible with lead-free reflow processes?
Yes - the 1PMT5946B/TR13 Powermite® package is qualified for standard lead-free reflow profiles (JEDEC J-STD-020), with peak temperatures up to 260°C. Its molded construction and metallic bottom ensure reliability through multiple thermal cycles without delamination or flux entrapment.
1PMT5946B/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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 140 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 56 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
1PMT5946B/TR13 FAQ
1.How can I place an order for 1PMT5946B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946B/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 1PMT5946B/TR13 reliable?
The price and inventory of 1PMT5946B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5946B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5946B/TR13?
1PMT5946B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946B/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 1PMT5946B/TR13?
For technical support, including 1PMT5946B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946B/TR13 requirements.
6.How does Aetrix verify that 1PMT5946B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946B/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 1PMT5946B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5946B/TR13?
All 1PMT5946B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946B/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 1PMT5946B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5946B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946B/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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