My Inquiry
My Account
Microchip Technology 1PMT5951C/TR7
- Part No.:
- 1PMT5951C/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5951C/TR7.pdf
- Description:
- DIODE ZENER 120V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,773
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5951C/TR7 from Microsemi is a 120 V, ±1% 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 - used for precision voltage regulation and overvoltage protection in compact DC power supplies.
For engineers reviewing the 1PMT5951C/TR7 datasheet, 1PMT5951C/TR7 pinout, 1PMT5951C/TR7 application, or 1PMT5951C/TR7 equivalent, key selection criteria include tight voltage tolerance (±1%), low reverse leakage (<1 µA at 91.2 V), ESD robustness (>16 kV HBM), and thermal performance enabled by the full metallic bottom and integral heat sink tab.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 120 V nominal Zener voltage is specified at 3.1 mA test current (IZT) with measurement performed 20 seconds after DC current application, per Microsemi Note 202 for voltage-current deviation analysis.
The device leverages the Powermite® package's full metallic bottom to eliminate solder flux entrapment and its locking tab as an integral heat sink, enabling reliable thermal transfer to PCB copper. Junction-to-TAB1 thermal resistance is 30°C/W, supporting continuous 3.0 W dissipation when TAB 1 is held at ≤60°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±1% at IZT = 3.1 mA - enables precise voltage clamping in high-voltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - defines maximum steady-state thermal load without derating |
| Dynamic Impedance (ZZT) | 380 Ω at IZT = 3.1 mA - determines output voltage variation under load current changes |
| 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 - quantifies temperature rise per watt, critical for PCB copper pad sizing |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and operation in unshielded industrial environments |
| Junction Temp Range | –55°C to +150°C - validates suitability for automotive under-hood and industrial control applications |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; connects to system ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-214AC |
| Integral heat sink locking tab | Provides mechanical anchoring during reflow and direct thermal conduction path from junction to PCB copper |
| Full metallic bottom | Eliminates solder flux entrapment risk, improving long-term reliability and void-free solder joint formation |
| ±1% Zener voltage tolerance (suffix C) | Reduces need for post-production trimming in precision reference and feedback circuits |
| ESD rating >16 kV HBM | Allows safe handling and integration into systems without additional ESD protection components |
Applications
| Industrial Power Supply Regulation | Automotive Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Stabilizing 120 V rail in isolated auxiliary power supply for PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing primary overvoltage clamp and reference voltage source. Use Value: ±1% tolerance ensures consistent trip point across production units; 3.0 W rating sustains transient surges without degradation. | Use Scenario: Protecting microcontroller ADC input from load-dump transients on 12 V battery-derived 120 V boost rail. IC Role / Device Role / Timing Role: High-voltage Zener clamp limiting voltage to safe level before signal conditioning stage. Use Value: 30°C/W thermal resistance allows effective heat sinking to chassis ground plane; >16 kV ESD rating prevents field failures. |
| Telecom Line Card Surge Suppression | Medical Imaging HV Bias Monitoring |
Use Scenario: Secondary surge suppression on -48 V telecom line card where 120 V Zener absorbs residual energy after primary TVS. IC Role / Device Role / Timing Role: Precision voltage clamp maintaining integrity of monitoring circuitry during lightning-induced surges. Use Value: Low 1 µA reverse leakage preserves accuracy of high-impedance sensing nodes; tight tolerance ensures repeatable clamping threshold. | Use Scenario: Reference voltage generator for calibration circuit in X-ray generator HV feedback loop. IC Role / Device Role / Timing Role: Stable 120 V reference source for analog-to-digital conversion of bias voltage. Use Value: 380 Ω dynamic impedance minimizes voltage shift under varying load currents; –55°C to +150°C rating supports sterilization cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF120A (ON Semiconductor) | DO-219AB package; 120 V, ±5%, 1.0 W PD; 1000 Ω ZZT at 1 mA | Lower power rating limits use to low-energy clamping; higher ZZT reduces regulation precision | Select when board space is constrained and 1.0 W suffices; not suitable for 3.0 W thermal loads |
| BZX84-C120 (Diodes Inc.) | SOT-23 package; 120 V, ±5%, 300 mW PD; 500 Ω ZZT at 5 mA | 1/10th the power capability; unsuitable for sustained regulation or surge absorption | Use only for low-current bias references; requires redesign for thermal management and layout |
Compared with SMF120A and BZX84-C120, the 1PMT5951C/TR7 delivers 3× higher power handling, 3–5× lower dynamic impedance, and ±1% tolerance - making it uniquely suited for high-reliability, high-power Zener regulation where thermal and precision constraints dominate.
Availability
1PMT5951C/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection, telecom line cards, and medical imaging systems requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5951C/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 RF solutions for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding applications - emphasizing rugged packaging, precision tolerance, and robust ESD performance.
FAQ
What is the Zener voltage tolerance for 1PMT5951C/TR7?
The "C" suffix in 1PMT5951C/TR7 denotes ±1% Zener voltage tolerance at 120 V nominal, verified at IZT = 3.1 mA and TAB 1 temperature of 30°C. This tighter tolerance eliminates post-production calibration in precision feedback loops and improves batch consistency in high-voltage reference designs using the 1PMT5951C/TR7.
How is thermal performance defined for 1PMT5951C/TR7?
1PMT5951C/TR7 has a junction-to-TAB1 thermal resistance of 30°C/W and is rated for 3.0 W DC power dissipation when TAB 1 is maintained at ≤60°C. Effective thermal design requires soldering TAB 1 to a minimum 100 mm² copper pad with ≥2 thermal vias - this thermal path is essential to achieve the full 3.0 W rating of the 1PMT5951C/TR7.
What does the "TR7" suffix indicate in 1PMT5951C/TR7?
The "TR7" suffix specifies tape-and-reel packaging per EIA-481 standard, with 3,000 units per 7-inch reel. This format ensures compatibility with high-speed pick-and-place equipment and supports automated SMT assembly - a key requirement for volume production of boards using the 1PMT5951C/TR7.
Can 1PMT5951C/TR7 replace through-hole Zener diodes in existing designs?
Yes, the 1PMT5951C/TR7 can replace through-hole equivalents like 1N5388B in new layouts, but requires PCB redesign: its Powermite® package uses TAB 1 (cathode) and Lead 2 (anode), with TAB 1 serving as both electrical and thermal interface. Direct drop-in replacement is not possible without adjusting pad geometry and thermal relief - the 1PMT5951C/TR7 demands dedicated surface-mount land patterns.
What is the maximum reverse leakage current for 1PMT5951C/TR7?
The maximum reverse leakage current for 1PMT5951C/TR7 is 1 µA at VR = 91.2 V (0.76 × VZ), measured at TL = 30°C. This ultra-low leakage preserves signal integrity in high-impedance bias networks and minimizes quiescent power loss - a critical advantage in battery-backed or energy-sensitive systems using the 1PMT5951C/TR7.
1PMT5951C/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
1PMT5951C/TR7 FAQ
1.How can I place an order for 1PMT5951C/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5951C/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 1PMT5951C/TR7 reliable?
The price and inventory of 1PMT5951C/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5951C/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5951C/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5951C/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5951C/TR7?
1PMT5951C/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5951C/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 1PMT5951C/TR7?
For technical support, including 1PMT5951C/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5951C/TR7 requirements.
6.How does Aetrix verify that 1PMT5951C/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5951C/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 1PMT5951C/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5951C/TR7?
All 1PMT5951C/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5951C/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 1PMT5951C/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5951C/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5951C/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
