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Microchip Technology 1PMT5948AE3/TR7
- Part No.:
- 1PMT5948AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5948AE3/TR7.pdf
- Description:
- DIODE ZENER 91V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
1PMT5948AE3/TR7 from Microsemi is a 3.0 W surface-mount Zener diode in the Powermite® package, with nominal Zener voltage 91 V ±5%, dynamic impedance 200 Ω at 4.1 mA test current, and thermal resistance 30°C/W junction-to-tab. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5948AE3/TR7 datasheet, 1PMT5948AE3/TR7 pinout, 1PMT5948AE3/TR7 application, or 1PMT5948AE3/TR7 equivalent, key selection criteria include Zener voltage tolerance, power derating above 60°C tab temperature, reverse leakage at 69.2 V, and compatibility with EIA-481 tape-and-reel automated assembly.
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 and locking tab to enhance thermal conduction and eliminate solder flux entrapment during reflow.
The device exhibits low reverse leakage (≤3000 µA at 69.2 V), ESD robustness (>16 kV HBM), and stable performance from −55°C to +150°C junction temperature. Zener voltage is measured at 4.1 mA with tab temperature held at 30°C for 20 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 4.1 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W at TL = 60°C on TAB 1 - maximum continuous DC power before thermal shutdown |
| Dynamic Impedance (ZZT) | 200 Ω at IZT = 4.1 mA - indicates voltage regulation stiffness against current variation |
| Reverse Leakage (IR) | ≤3000 µA at VR = 69.2 V - sets minimum clamping threshold and standby power loss |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - determines temperature rise per watt dissipated into PCB copper pad |
| ESD Rating | >16 kV per Human Body Model - ensures handling robustness without external protection |
| Operating Temperature | −55°C to +150°C junction/storage - supports industrial and automotive under-hood environments |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; DO-216 outline; weight ≈0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; reverse-biased configuration places this at lower potential during regulation |
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 |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term reliability and void-free solder joints |
| ESD robustness >16 kV HBM | Reduces need for external ESD protection in board-level transient suppression designs |
| Tight Zener voltage tolerance option | ±1% (suffix D) or ±2% (suffix C) available - supports precision reference applications beyond standard ±5% |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference establishing precise 91 V threshold for TL431-like feedback control. Use Value: Maintains ±5% output regulation across line/load/temperature with minimal component count and no active IC. | Use Scenario: Clamping analog sensor outputs (e.g., 4–20 mA transmitters) against ESD or surge events. IC Role / Device Role / Timing Role: Passive overvoltage protector shunting transients above 69.2 V to ground. Use Value: Prevents damage to downstream op-amps or ADC inputs while adding <0.016 g mass and zero power consumption in steady state. |
| Automotive Lighting Control | Programmable Logic Controller I/O Protection |
Use Scenario: Protecting LED driver ICs from load-dump transients in 24 V vehicle systems. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing 3.0 W pulses up to 150°C ambient. Use Value: Survives ISO 7637-2 Pulse 5a without derating, leveraging 30°C/W thermal resistance and metallic tab mounting. | Use Scenario: Safeguarding digital input channels of PLC modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary reverse-bias clamp limiting voltage to ≤69.2 V during 1 kV/µs fast transients. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (2 kV) when combined with series impedance, without requiring TVS array. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5375B | Same 91 V nominal Zener voltage, but DO-204AL package; 5 W rating; higher thermal resistance (50°C/W) | Requires larger PCB footprint and heatsinking; better suited for non-SMT legacy designs | Select 1N5375B only if through-hole assembly or higher power margin is required; not drop-in compatible |
| BZX84-C91 | 91 V ±5%, SOT-23 package; 300 mW rating; 500 Ω ZZT; no metallic heat sink tab | Limited to low-power signal-level clamping; unsuitable for sustained 3 W dissipation | Choose BZX84-C91 only for space-constrained signal rails where power stress is negligible |
Compared with 1N5375B and BZX84-C91, the 1PMT5948AE3/TR7 uniquely combines 3.0 W surface-mount capability, 30°C/W thermal resistance, and flux-free metallic bottom-making it optimal for thermally demanding, high-reliability SMT power regulation where size and assembly yield matter.
Availability
1PMT5948AE3/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive lighting control, and programmable logic controller I/O protection requiring stable component supply and consistent tape-and-reel delivery.
Supply support for 1PMT5948AE3/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 product line was engineered for high-power density surface-mount voltage regulation and transient suppression in space-constrained, thermally aggressive environments.
FAQ
What is the Zener voltage tolerance for 1PMT5948AE3/TR7?
The 1PMT5948AE3/TR7 has a standard Zener voltage tolerance of ±5% at 91 V nominal. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available as custom order options. Voltage is measured at 4.1 mA test current with tab temperature stabilized at 30°C for 20 seconds, per Microsemi Note 202.
How is thermal management handled in the 1PMT5948AE3/TR7 package?
The 1PMT5948AE3/TR7 uses a Powermite® package with TAB 1 as the cathode and primary thermal path. Its 30°C/W junction-to-tab thermal resistance requires direct soldering of TAB 1 to a copper pour for effective heat dissipation. The full metallic bottom and locking tab ensure low-impedance conduction and mechanical stability during reflow.
Can 1PMT5948AE3/TR7 replace through-hole Zener diodes like 1N5375B in existing designs?
No, the 1PMT5948AE3/TR7 is not a drop-in replacement for 1N5375B due to different package (Powermite® vs. DO-204AL), pinout, and thermal interface. While both regulate at 91 V, PCB layout, solder profile, and heatsinking must be redesigned to accommodate the surface-mount metallic tab and 30°C/W thermal path of the 1PMT5948AE3/TR7.
What is the maximum reverse leakage current for 1PMT5948AE3/TR7 at rated voltage?
At reverse voltage VR = 69.2 V (76% of nominal 91 V), the 1PMT5948AE3/TR7 exhibits maximum reverse leakage current of 3000 µA. This value is specified in the MSC0995 datasheet and defines the upper bound of standby current draw when used as a clamp below breakdown.
Is 1PMT5948AE3/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5948AE3/TR7 is fully compatible with automated insertion and reflow processes. It ships in EIA-481-compliant tape-and-reel format (3,000 pieces per 7-inch reel), features a flux-free metallic bottom to prevent solder voids, and is designed for reliable pick-and-place handling using standard vision-guided feeders.
1PMT5948AE3/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:
- ±10%
- 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
1PMT5948AE3/TR7 FAQ
1.How can I place an order for 1PMT5948AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5948AE3/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 1PMT5948AE3/TR7 reliable?
The price and inventory of 1PMT5948AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5948AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5948AE3/TR7?
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4.How is shipping managed for 1PMT5948AE3/TR7?
1PMT5948AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5948AE3/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 1PMT5948AE3/TR7?
For technical support, including 1PMT5948AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5948AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5948AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5948AE3/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 1PMT5948AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5948AE3/TR7?
All 1PMT5948AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5948AE3/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 1PMT5948AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5948AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5948AE3/TR7 Tags
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