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Microchip Technology 1PMT5948E3/TR7
- Part No.:
- 1PMT5948E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5948E3/TR7.pdf
- Description:
- DIODE ZENER 91V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,310
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Product details
Overview
1PMT5948E3/TR7 from Microsemi is a 91 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 temperature of 60°C, with dynamic impedance of 200 Ω at 4.1 mA test current and reverse leakage ≤3000 µA at 69.2 V, used for precision voltage regulation and overvoltage protection in compact DC power rails.
For engineers reviewing the 1PMT5948E3/TR7 datasheet, 1PMT5948E3/TR7 pinout, 1PMT5948E3/TR7 application, or 1PMT5948E3/TR7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD robustness (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly on high-density PCBs.
Technical Context
This device operates as a voltage-reference and clamping element in regulated power supplies and transient suppression circuits. Its Powermite® package features a full metallic bottom and integral heat-sink locking tab, enabling direct thermal conduction to the PCB copper pour while eliminating solder flux entrapment during reflow.
The 1PMT5948E3/TR7 exhibits a nominal Zener voltage of 91 V at 4.1 mA (IZT), with tight knee characteristics (IZK = 0.25 mA, ZZK = 3000 Ω) and low reverse leakage (≤3000 µA at VR = 69.2 V), supporting stable regulation under light-load and standby conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 4.1 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-power regulation in ultra-compact SMT footprint |
| Dynamic Impedance (ZZT) | 200 Ω at IZT - ensures minimal output voltage deviation under load transients |
| Knee Impedance (ZZK) | 3000 Ω at IZK = 0.25 mA - maintains regulation stability down to microamp-level bias currents |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal coupling to PCB ground plane for reliable derating |
| ESD Rating | >16 kV per Human Body Model - provides robust handling and system-level ESD immunity without external protection |
| Reverse Leakage | ≤3000 µA at VR = 69.2 V - guarantees low quiescent current in standby and battery-backed circuits |
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 and electrical cathode connection; must be soldered to large copper area for thermal management |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1; used for series biasing or sensing |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow assembly while delivering 3 W power handling in sub-3 mm² footprint |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal transfer efficiency to PCB |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal path from junction to PCB copper pour |
| ESD robustness | >16 kV HBM rating reduces need for external ESD protection in end-equipment interfaces |
| Tight Zener tolerance option | ±1% (suffix D) and ±2% (suffix C) available - supports high-accuracy reference designs |
Applications
| Industrial Power Supply Regulation | Automotive ECUs |
|---|---|
Use Scenario: Primary voltage reference in isolated DC-DC converter feedback loops for 24 V and 48 V industrial systems. IC Role / Device Role / Timing Role: Zener diode providing stable 91 V reference for optocoupler-based feedback network. Use Value: Maintains ±5% output regulation across temperature (-55°C to +150°C) with no external trimming required. | Use Scenario: Overvoltage clamp on LIN bus or sensor supply lines exposed to load-dump transients. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting 5 V/12 V analog front-end circuitry from 100 V spikes. Use Value: Clamps within 200 ns with <3000 µA leakage at 69.2 V, preserving signal integrity during normal operation. |
| Telecom DC-DC Modules | Medical Diagnostic Equipment |
Use Scenario: Secondary-side voltage monitor in telecom rectifier modules requiring fail-safe shutdown at >90 V. IC Role / Device Role / Timing Role: Precision Zener acting as comparator reference for overvoltage detection circuit. Use Value: Delivers 91 V ±5% threshold with 200 Ω dynamic impedance, ensuring repeatable trip point across production lots. | Use Scenario: Bias voltage regulator for high-voltage photomultiplier tube (PMT) supplies in imaging systems. IC Role / Device Role / Timing Role: Stable 91 V reference source for cascaded gain stages requiring low-drift DC bias. Use Value: Achieves <0.1%/°C voltage drift via thermal coupling to metal-tab heatsink, minimizing calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B | Same 91 V nominal Zener voltage but DO-201AD package; higher thermal resistance (50°C/W); no metallic bottom or locking tab | Limited to lower-power or non-automated assembly; unsuitable for high-reliability thermal cycling environments | Select only when board space permits larger package and thermal performance is secondary |
| SMBJ91A | TVS diode (not Zener); 91 V breakdown at 1 mA; 600 W peak pulse power; higher leakage (5 µA typical at 73.7 V) | Designed for surge suppression, not precision regulation; lacks stable DC Zener characteristic | Use only for transient-only protection; not interchangeable for voltage reference or bias functions |
Compared with 1N5365B and SMBJ91A, the 1PMT5948E3/TR7 uniquely combines 3 W DC power handling, 30°C/W thermal resistance, and automated-assembly readiness in a miniature Powermite® package-making it optimal for space-constrained, thermally demanding Zener regulation tasks where long-term DC stability matters.
Availability
1PMT5948E3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, telecom DC-DC modules, and medical diagnostic equipment requiring stable component supply with consistent Zener voltage accuracy and thermal reliability.
Supply support for 1PMT5948E3/TR7 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 1PMT5948E3/TR7-is engineered for high-power density voltage regulation in space-constrained, thermally aggressive environments where traditional through-hole or larger SMT packages cannot meet size or thermal goals.
FAQ
What is the Zener voltage tolerance of the 1PMT5948E3/TR7?
The 1PMT5948E3/TR7 has a standard Zener voltage tolerance of ±5% at 91 V, measured at 4.1 mA test current and TAB 1 temperature of 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request, but the base 1PMT5948E3/TR7 part uses the ±5% specification per Microsemi MSC0995 Rev F.
How is thermal management implemented in the 1PMT5948E3/TR7 package?
The 1PMT5948E3/TR7 uses the Powermite® package with a full metallic bottom and integral heat-sink locking tab (TAB 1). This design achieves 30°C/W junction-to-TAB thermal resistance, requiring direct soldering of TAB 1 to a large PCB copper pour for effective heat dissipation during 3.0 W continuous operation.
Is the 1PMT5948E3/TR7 compatible with standard SMT reflow processes?
Yes, the 1PMT5948E3/TR7 is qualified for standard lead-free reflow profiles per J-STD-020. Its molded Powermite® package and metallic bottom eliminate solder flux entrapment, and its -55°C to +150°C junction/storage temperature range supports robust thermal cycling in automated assembly lines.
What is the maximum reverse leakage current for the 1PMT5948E3/TR7?
The 1PMT5948E3/TR7 has a maximum reverse leakage current of 3000 µA at a reverse voltage of 69.2 V, measured at TL = 30°C. This value is specified in the Microsemi MSC0995 datasheet and reflects worst-case leakage under rated clamping conditions.
Does the 1PMT5948E3/TR7 have ESD protection built-in?
Yes, the 1PMT5948E3/TR7 is rated for >16 kV per the Human Body Model (HBM), as confirmed in the Microsemi MSC0995 datasheet. This intrinsic ESD robustness eliminates the need for additional external protection in many interface and bias applications.
1PMT5948E3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 91 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 69.2 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
1PMT5948E3/TR7 FAQ
1.How can I place an order for 1PMT5948E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5948E3/TR7 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 1PMT5948E3/TR7 reliable?
The price and inventory of 1PMT5948E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5948E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5948E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5948E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5948E3/TR7?
1PMT5948E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5948E3/TR7 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 1PMT5948E3/TR7?
For technical support, including 1PMT5948E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5948E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5948E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5948E3/TR7 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 1PMT5948E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5948E3/TR7?
All 1PMT5948E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5948E3/TR7, 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 1PMT5948E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5948E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5948E3/TR7 Tags
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