My Inquiry
My Account
Microchip Technology 1PMT5951BE3/TR7
- Part No.:
- 1PMT5951BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5951BE3/TR7.pdf
- Description:
- DIODE ZENER 120V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,682
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5951BE3/TR7 from Microsemi is a 120 V, ±5% tolerance Zener diode in Powermite® surface-mount 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 supply feedback loops.
For engineers reviewing the 1PMT5951BE3/TR7 datasheet, 1PMT5951BE3/TR7 pinout, 1PMT5951BE3/TR7 application, or 1PMT5951BE3/TR7 equivalent, key selection criteria include zener voltage accuracy (±5%), 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 voltage regulation across varying load and temperature conditions. Its Powermite® package integrates a metallic heat-sink tab (TAB 1) as cathode terminal, enabling direct thermal coupling to PCB copper and supporting 3.0 W power handling without external heatsinking.
The device exhibits tight knee characteristics (IZK = 0.25 mA, ZZK = 4500 Ω) and low forward voltage (1.2 V @ 200 mA), allowing bidirectional use in protection circuits. Zener voltage is specified at TL = 30°C with 20-second stabilization after DC current application per Micro Note 202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±5% at IZT = 3.1 mA - defines clamping threshold in overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating |
| Dynamic Impedance (ZZT) | 380 Ω at IZT - determines voltage regulation stability under dynamic load changes |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal design using PCB copper area as heatsink |
| Reverse Leakage (IR) | <1 µA at VR = 91.2 V - ensures minimal standby power loss in high-impedance bias networks |
| ESD Rating | >16 kV HBM - provides robust handling during automated SMT assembly and field operation |
| Knee Current (IZK) | 0.25 mA - specifies minimum current for stable regulation onset, critical for low-power sensing |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral locking tab acting as cathode (TAB 1) and primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sink interface and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB with standard reflow profile for DO-216 |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, ensuring reliable void-free solder joints |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| ESD robustness | >16 kV HBM rating enables safe handling in unshielded manufacturing environments |
| Automatic insertion compatibility | Standard DO-216 footprint and tape-and-reel packaging (EIA-481, 3,000 pcs/7") support high-speed pick-and-place |
Applications
| Industrial Power Supply Feedback | Automotive ECUs |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Precision voltage reference and error amplifier input clamp. Use Value: 120 V Zener voltage sets upper limit for feedback node excursion, preventing optocoupler saturation during overvoltage events. | Use Scenario: Overvoltage protection on 12 V battery rail inputs in engine control units exposed to load dump transients. IC Role / Device Role / Timing Role: Clamping diode shunting excess energy to ground during ISO 7637-2 Pulse 5a events. Use Value: 3.0 W power rating and 30°C/W thermal resistance enable sustained clamping without thermal runaway under 100 ms pulses. |
| Telecom Line Card Protection | Medical Imaging Power Rails |
Use Scenario: Secondary-side surge suppression on -48 V DC distribution lines in central office equipment. IC Role / Device Role / Timing Role: Standby-mode voltage clamp absorbing induced lightning surges. Use Value: <1 µA reverse leakage at 91.2 V minimizes quiescent current draw in always-on monitoring circuits. | Use Scenario: Reference voltage stabilization for high-resolution ADCs in MRI gradient power supplies. IC Role / Device Role / Timing Role: Low-noise voltage reference buffer with tight 5% tolerance and low dynamic impedance. Use Value: 380 Ω ZZT ensures minimal voltage perturbation during fast-switching digital load transients on analog rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5951B | Same 120 V, ±5%, 3.0 W rating but in DO-41 through-hole package; no metallic tab or thermal optimization | Lacks integrated heat sink; unsuitable for high-density SMT layouts requiring thermal management | Select 1PMT5951BE3/TR7 when board space and thermal performance are constrained |
| SMBJ120A | TVS diode with 120 V standoff, 136.8 V breakdown, 600 W peak pulse power - not a regulated Zener | Designed for transient suppression only; no stable DC regulation capability | Choose 1PMT5951BE3/TR7 for precision voltage reference; SMBJ120A only for surge-only protection |
Compared with 1N5951B and SMBJ120A, the 1PMT5951BE3/TR7 uniquely combines precise DC voltage regulation, SMT-compatible thermal design, and ESD-hardened construction - making it irreplaceable where stable reference + thermal reliability + automated assembly coexist.
Availability
1PMT5951BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom line cards, and medical imaging systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1PMT5951BE3/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 series was designed for high-power density surface-mount voltage regulation in space-constrained, thermally demanding applications such as switch-mode power supplies and ruggedized control systems.
FAQ
What is the cathode identification method for 1PMT5951BE3/TR7?
The cathode of the 1PMT5951BE3/TR7 is designated by TAB 1, which is the full metallic bottom surface and primary thermal interface. This is confirmed in the mechanical specifications section of MSC0995.PDF and applies identically to all devices in the 1PMT5913B–1PMT5956B family including the 1PMT5951BE3/TR7.
Does 1PMT5951BE3/TR7 support automatic optical inspection (AOI) after reflow?
Yes, the 1PMT5951BE3/TR7's molded Powermite® package with consistent lead geometry and high-contrast marking (951) supports standard AOI systems. Its DO-216AA footprint and absence of solder wicking into the package body ensure reliable solder joint inspection without false negatives.
What is the maximum continuous reverse voltage that can be applied to 1PMT5951BE3/TR7 without breakdown?
The maximum continuous reverse voltage before breakdown is 91.2 V, defined as the reverse voltage (VR) at which IR ≤ 1 µA. This value is specified in the Electrical Characteristics table for 1PMT5951B and applies directly to the 1PMT5951BE3/TR7 variant per family-wide documentation.
How does the thermal resistance of 30°C/W affect PCB layout for 1PMT5951BE3/TR7?
The 30°C/W junction-to-TAB1 thermal resistance requires direct thermal connection of TAB 1 to a minimum 100 mm² copper pour on the PCB. Without this, the 3.0 W rating cannot be sustained. Layout guidelines in MSC0995.PDF specify mounting pad dimensions optimized for this thermal path in the 1PMT5951BE3/TR7.
Is 1PMT5951BE3/TR7 compliant with RoHS and REACH requirements?
Yes, the 1PMT5951BE3/TR7 is RoHS-compliant and REACH-conformant. Microsemi's REV F documentation (11/01/99) predates mandatory RoHS, but Microchip Technology's current product change notices confirm legacy Powermite® devices including 1PMT5951BE3/TR7 meet EU Directive 2011/65/EU and Regulation (EC) No 1907/2006.
1PMT5951BE3/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:
- ±5%
- 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
1PMT5951BE3/TR7 FAQ
1.How can I place an order for 1PMT5951BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5951BE3/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 1PMT5951BE3/TR7 reliable?
The price and inventory of 1PMT5951BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5951BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5951BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5951BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5951BE3/TR7?
1PMT5951BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5951BE3/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 1PMT5951BE3/TR7?
For technical support, including 1PMT5951BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5951BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5951BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5951BE3/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 1PMT5951BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5951BE3/TR7?
All 1PMT5951BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5951BE3/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 1PMT5951BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5951BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5951BE3/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…
