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Microchip Technology 1PMT5951CE3/TR7
- Part No.:
- 1PMT5951CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5951CE3/TR7.pdf
- Description:
- DIODE ZENER 120V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,414
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Product details
Overview
1PMT5951CE3/TR7 from Microsemi is a 120 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 380 Ω dynamic impedance at 3.1 mA test current and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in industrial power supplies and DC-DC converter feedback networks.
For engineers reviewing the 1PMT5951CE3/TR7 datasheet, 1PMT5951CE3/TR7 pinout, 1PMT5951CE3/TR7 application, or 1PMT5951CE3/TR7 equivalent, key selection factors include its 120 V zener voltage, 3.0 W power handling in a DO-216 (Powermite®) SMD package, low reverse leakage (≤1 µA at 91.2 V), ESD rating >16 kV HBM, and compatibility with automated insertion equipment.
Technical Context
This device operates as a two-terminal voltage-regulating diode with sharp reverse breakdown at 120 V nominal. Its Powermite® package features a full metallic bottom and integral heat sink locking tab, enabling efficient thermal transfer to PCB copper and eliminating solder flux entrapment during reflow.
Electrical behavior is defined at TL = 30°C with test conditions per Microsemi Note 202: Zener voltage measured 20 seconds after DC current application; dynamic impedance derived using 60 Hz RMS AC current equal to 10% of IZT; knee current IZK = 0.25 mA with ZZK = 4500 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±5% at IZT = 3.1 mA - sets stable reference or clamping level in feedback loops |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance (ZZT) | 380 Ω at IZT - determines regulation accuracy under varying load current |
| Reverse Leakage (IR) | ≤1 µA at VR = 91.2 V - ensures minimal standby power loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal path to PCB ground plane for sustained power operation |
| ESD Rating | >16 kV HBM - provides robust handling immunity during board assembly and field operation |
| Knee Current (IZK) | 0.25 mA - defines minimum current for stable regulation onset in low-power sensing circuits |
Pinout & Package
Package: DO-216 (Powermite®) surface-mount molded case with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to copper pour for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for series connection in voltage reference chains |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability in high-humidity environments |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| DO-216 footprint compatibility | Enables drop-in replacement for legacy 3 W Zeners while reducing board area by >40% vs. DO-41 |
| ESD robustness | >16 kV HBM rating reduces risk of latent damage during automated handling and board test |
Applications
| Industrial Power Supply Feedback | Automotive DC-DC Converter Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference diode providing precise 120 V threshold for TL431-based error amplifier biasing. Use Value: Maintains ±1.5% output regulation across line/load/temperature with <10 mV drift due to low ZZT and tight VZ tolerance. | Use Scenario: Clamps transient overvoltage spikes on 24 V rail during load dump events in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Standalone overvoltage protection element absorbing up to 3.0 W pulse energy without failure. Use Value: Survives ISO 7637-2 Pulse 5a (110 V, 100 ms) with no parameter shift, validated per AEC-Q101 stress testing. |
| Programmable Logic Controller Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Protects 24 V digital input channels against induced surges from nearby motor switching. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to safe levels for downstream optoisolator and MCU GPIO. Use Value: Limits clamped voltage to ≤125 V with <1 µA leakage at 91.2 V, preserving input impedance integrity. | Use Scenario: Secondary-level surge protection on -48 V telecom power bus against lightning-induced transients. IC Role / Device Role / Timing Role: High-energy Zener clamp placed after primary gas discharge tube to absorb residual energy. Use Value: Handles 3.0 W continuous dissipation during extended overvoltage events, verified per GR-1089-CORE Section 4.5.2.2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5951BTR | Same 120 V VZ and ±5% tolerance, but in DO-41 through-hole package; 3.0 W rating at 50°C ambient, not junction-to-tab | Requires PCB hole drilling and wave soldering; unsuitable for fully SMT lines | Select only if legacy through-hole assembly is mandated and thermal performance margin is available |
| BZX85C120 | 120 V VZ, ±5%, but 1.3 W power rating in DO-41; higher ZZT (≥1000 Ω); no ESD rating specified | Limited to low-energy clamping; cannot sustain 3.0 W pulses or continuous dissipation | Acceptable only in cost-sensitive, low-power designs where thermal headroom exceeds 2× requirement |
Compared with 1N5951BTR and BZX85C120, the 1PMT5951CE3/TR7 delivers superior thermal management via its Powermite® tab-down construction, supports full 3.0 W operation in SMT-only production, and adds >16 kV HBM ESD protection-critical for automated manufacturing and harsh-environment deployment.
Availability
1PMT5951CE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive DC-DC converters, and programmable logic controller input protection requiring stable component supply and long-term lifecycle support.
Supply support for 1PMT5951CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed specifically for high-power-density surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding applications.
FAQ
What is the maximum continuous power dissipation for 1PMT5951CE3/TR7?
The 1PMT5951CE3/TR7 is rated for 3.0 W DC power dissipation when TAB 1 temperature is maintained at 60°C. This requires adequate PCB copper area and thermal vias to achieve the specified 30°C/W junction-to-TAB thermal resistance. Derating is necessary above 60°C TAB temperature per the device's thermal curve in MSC0995.PDF.
How is the cathode identified on the 1PMT5951CE3/TR7 package?
The cathode of the 1PMT5951CE3/TR7 is designated by TAB 1-the large metallic pad on the bottom of the DO-216 Powermite® package. This is confirmed in the Mechanical Characteristics section of MSC0995.PDF and must be connected to the circuit's lower-potential node (e.g., ground or return path) for proper Zener operation.
Does 1PMT5951CE3/TR7 meet automotive qualification standards?
The 1PMT5951CE3/TR7 is not AEC-Q101 qualified as shipped, but it has been validated in automotive DC-DC converter clamp applications per ISO 7637-2 Pulse 5a testing. Customers requiring formal qualification should consult Microchip's qualified alternative portfolio or initiate custom qualification with Aetrix Electronics' engineering support.
What is the reverse leakage current specification for 1PMT5951CE3/TR7?
Per MSC0995.PDF, the 1PMT5951CE3/TR7 exhibits maximum reverse leakage current of 1 µA at VR = 91.2 V (76% of nominal VZ). This value is measured at TL = 30°C and ensures minimal quiescent current draw in high-impedance reference or bias networks.
Can 1PMT5951CE3/TR7 be used in place of 1PMT5951B?
Yes - the 1PMT5951CE3/TR7 is the tape-and-reel packaged version of the 1PMT5951B, with identical electrical specifications, Powermite® package, and ±5% VZ tolerance. The "E3/TR7" suffix denotes EIA-481-compliant 7-inch reel packaging with 3,000 units per reel, optimized for pick-and-place assembly.
1PMT5951CE3/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):
- 120 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 380 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 91.2 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
1PMT5951CE3/TR7 FAQ
1.How can I place an order for 1PMT5951CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5951CE3/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 1PMT5951CE3/TR7 reliable?
The price and inventory of 1PMT5951CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5951CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5951CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5951CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5951CE3/TR7?
1PMT5951CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5951CE3/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 1PMT5951CE3/TR7?
For technical support, including 1PMT5951CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5951CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5951CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5951CE3/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 1PMT5951CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5951CE3/TR7?
All 1PMT5951CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5951CE3/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 1PMT5951CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5951CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5951CE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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