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Microchip Technology 1PMT5951/TR7
- Part No.:
- 1PMT5951/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5951/TR7.pdf
- Description:
- DIODE ZENER 120V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,911
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Product details
Overview
1PMT5951/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 19.8 mA maximum Zener current. It serves as a precision voltage reference or overvoltage clamp in industrial power supply feedback loops.
For engineers reviewing the 1PMT5951/TR7 datasheet, 1PMT5951/TR7 pinout, 1PMT5951/TR7 application, or 1PMT5951/TR7 equivalent, key selection criteria include its 120 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, and ESD rating >16 kV HBM - all critical for ruggedized DC-DC regulation and transient protection designs.
Technical Context
This device operates as a single-junction silicon Zener diode optimized for stable reverse-biased voltage regulation. Its cathode is unambiguously designated by TAB 1, and it achieves thermal management through direct conduction from junction to full metallic bottom (TAB 1), yielding 30°C/W junction-to-tab thermal resistance.
The 1PMT5951/TR7 is characterized at TL = 30°C with IZT = 3.1 mA, VZ = 120 V, ZZT = 380 Ω, IZK = 0.25 mA, and IR ≤ 1 µA at VR = 91.2 V. It complies with EIA-481 tape-and-reel packaging for automated SMT placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±5% at IZT = 3.1 mA - defines precise clamping threshold for 110–130 V system rails |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without external heatsink |
| Dynamic Impedance (ZZT) | 380 Ω at IZT - ensures minimal voltage shift under load current variation in feedback networks |
| Reverse Leakage (IR) | ≤1 µA at VR = 91.2 V - guarantees low standby power loss in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal derating when mounted on copper pour or chassis |
| ESD Rating | >16 kV per HBM - provides robust handling margin during board assembly and field operation |
| Package | DO-216 (Powermite®) - surface-mount footprint with integral heat-sinking tab and flux-free metallic base |
Pinout & Package
Package: DO-216 (Powermite®) - molded surface-mount package with full metallic bottom (TAB 1) acting as cathode terminal and primary thermal path. 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 interface; must be soldered to ≥1 cm² copper for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1; used for forward bias or series configuration |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat-sink locking tab | TAB 1 functions as both cathode and low-thermal-resistance path to PCB copper, eliminating need for secondary thermal vias |
| Full metallic bottom | Prevents solder flux entrapment during reflow, ensuring reliable void-free solder joints and long-term interconnect integrity |
| Automated insertion compatibility | EIA-481 tape-and-reel packaging (7″/3,000 pcs) supports high-speed pick-and-place without manual handling or orientation errors |
| High ESD robustness | >16 kV HBM rating reduces risk of latent damage during handling, testing, and end-equipment integration |
Applications
| Industrial Power Supply Feedback | Telecom Line Card Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters where primary-side sensing requires stable Zener reference. IC Role / Device Role / Timing Role: Precision voltage reference element in TL431-like shunt regulator topologies. Use Value: 120 V Zener voltage matches common 110 VAC-derived bus rails; ±5% tolerance ensures consistent loop gain across production units. | Use Scenario: Protecting line interface ICs from lightning-induced surges on -48 V telecom distribution buses. IC Role / Device Role / Timing Role: Standby overvoltage clamp that conducts only above safe rail threshold. Use Value: 3.0 W power rating absorbs multi-millisecond transients; DO-216 package fits dense line-card layouts without compromising creepage. |
| Automotive Body Control Module (BCM) Input Protection | Medical Equipment Battery Backup Supervisor |
Use Scenario: Clamping 12 V/24 V battery rail spikes caused by load dump or alternator switching transients. IC Role / Device Role / Timing Role: Primary passive overvoltage suppression device upstream of LDOs and microcontrollers. Use Value: -55°C to +150°C operating range meets AEC-Q101 ambient requirements; metallic tab ensures thermal stability during repeated surge events. | Use Scenario: Monitoring backup battery voltage in infusion pumps or diagnostic analyzers to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Reference node in comparator-based undervoltage detection circuit. Use Value: Low 1 µA reverse leakage preserves battery life over months of standby; tight 5% VZ tolerance avoids false triggers across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ120A | TVS diode (unidirectional), 120 V breakdown, 1500 W peak pulse power, higher clamping voltage (~165 V) | Designed for fast transient suppression (8/20 µs), not precision DC regulation | Select for surge immunity; avoid where stable DC reference or low dynamic impedance is required |
| 1N5388B | Through-hole 120 V Zener, 5 W, DO-201AD package, 300 Ω ZZT, no integrated thermal tab | Larger footprint, lower power density, less suitable for automated SMT lines | Select for legacy through-hole designs or higher continuous power needs; not drop-in compatible |
Compared with SMCJ120A and 1N5388B, the 1PMT5951/TR7 uniquely combines SMT manufacturability, 3.0 W DC power handling via TAB 1 thermal path, and 380 Ω dynamic impedance - making it optimal for compact, thermally constrained, precision-regulation applications rather than surge-only or through-hole use cases.
Availability
1PMT5951/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and medical battery supervisors requiring stable component supply with full traceability and lifecycle support.
Supply support for 1PMT5951/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 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 1PMT5951/TR7, was engineered for high-power-density surface-mount voltage regulation in space-constrained, thermally demanding environments - particularly where automated assembly and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance for 1PMT5951/TR7?
The 1PMT5951/TR7 has a standard Zener voltage tolerance of ±5% at 120 V nominal, measured at IZT = 3.1 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the /TR7 variant ships with standard ±5%.
How is thermal performance managed in the 1PMT5951/TR7 package?
The 1PMT5951/TR7 uses its full metallic bottom (TAB 1) as both cathode and primary thermal conduction path, achieving 30°C/W junction-to-tab thermal resistance. For full 3.0 W dissipation, TAB 1 must be soldered to ≥1 cm² of 2-oz copper with thermal vias - verified in Microsemi's MSC0995 thermal characterization.
Is 1PMT5951/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5951/TR7 is qualified for lead-free reflow per J-STD-020, with peak temperature tolerance up to 260°C. Its molded Powermite® package and metallic tab ensure mechanical integrity and solder joint reliability under standard Pb-free thermal profiles.
What does the "/TR7" suffix indicate for 1PMT5951/TR7?
The "/TR7" suffix denotes EIA-481-compliant tape-and-reel packaging on a 7-inch reel containing 3,000 units. This format is optimized for high-speed SMT placement equipment and ensures consistent orientation (cathode TAB 1 facing outward) per Microsemi's packaging specification MSC0995.
Can 1PMT5951/TR7 be used in place of a 1N5388B in existing designs?
No - while both are 120 V Zeners, the 1PMT5951/TR7 is a surface-mount DO-216 device with integral thermal tab, whereas the 1N5388B is through-hole DO-201AD. They differ in package, thermal path, mounting method, and power derating curves; redesign of pad layout and thermal management is required for substitution.
1PMT5951/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:
- ±20%
- 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
1PMT5951/TR7 FAQ
1.How can I place an order for 1PMT5951/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5951/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 1PMT5951/TR7 reliable?
The price and inventory of 1PMT5951/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5951/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5951/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5951/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5951/TR7?
1PMT5951/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5951/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 1PMT5951/TR7?
For technical support, including 1PMT5951/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5951/TR7 requirements.
6.How does Aetrix verify that 1PMT5951/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5951/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 1PMT5951/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5951/TR7?
All 1PMT5951/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5951/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 1PMT5951/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5951/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5951/TR7 Tags
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