My Inquiry
My Account
onsemi 1PMT5921BT1
- Part No.:
- 1PMT5921BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5921BT1.pdf
- Description:
- DIODE ZENER 6.8V 3.2W POWERMITE
- Quantity:
- Payment:
- Shipping:
Inventory:6,427
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5921BT1 from onsemi is a 3.2 W surface-mount Zener diode in the POWERMITE® (DO−216AA) package, with nominal Zener voltage 6.8 V at 55.1 mA test current, maximum dynamic impedance 2.5 Ω at IZT, and reverse leakage ≤5.0 µA at 5.2 V. It delivers low-profile thermal performance (1.1 mm height, 23°C/W junction-to-cathode thermal resistance) for voltage regulation in space-constrained portable power rails.
For engineers reviewing the 1PMT5921BT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 6.8 V ±5% tolerance, 3.2 W DC power dissipation at cathode temperature of 75°C, Class 3 ESD rating (>16 kV HBM), and Pb-free tape-and-reel packaging (12,000 units/reel).
Technical Context
This device operates as a precision shunt voltage regulator, maintaining stable output voltage across varying load currents via controlled reverse-biased Zener breakdown. Its thermal design centers on the cathode tab as primary heat path (RJcathode = 23°C/W), enabling high power density in minimal PCB area.
The POWERMITE package integrates full metallic bottom and locking tabs to ensure mechanical stability and solder joint reliability during reflow. Electrical behavior is defined by two critical operating points: IZT = 55.1 mA (for VZ specification) and IZK = 1.0 mA (for low-current regulation), with ZZK = 200 Ω confirming usable regulation down to microampere-level currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46–7.14 V at IZT = 55.1 mA - defines regulated output range under typical bias conditions |
| DC Power Dissipation | 3.2 W at Ttab = 75°C - sets maximum continuous power handling with cathode heatsinking |
| Zener Impedance (ZZT) | 2.5 Ω max at IZT - ensures tight voltage regulation under dynamic load changes |
| Reverse Leakage (IR) | ≤5.0 µA at VR = 5.2 V - guarantees low standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust protection against human-body electrostatic discharge events |
| Package Height | Max 1.1 mm - enables use in ultra-thin consumer devices such as smartphones and wearables |
| Thermal Resistance (Junction-to-Cathode) | 23°C/W - allows direct thermal coupling to PCB copper for efficient heat removal |
Pinout & Package
1PMT5921BT1 uses the POWERMITE® (DO−216AA) surface-mount plastic package, featuring a full metallic bottom, integral heat sink tabs, and polarity band marking for cathode identification. Dimensions: 2.05 × 2.18 × 1.10 mm (L × W × H), footprint area 8.45 mm².
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Main heat extraction path; must be connected to thermal pad or copper pour for rated 3.2 W operation |
| 2 | Anode | Reference node for Zener biasing; connects to ground or lower-potential rail in shunt regulator configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile thermal package | 1.1 mm max height with 23°C/W RJcathode - achieves SMA-equivalent thermal performance in 50% smaller footprint |
| Integrated heat sink tabs | Mechanical locking + thermal conduction - improves solder joint reliability and reduces thermal resistance to PCB |
| Full metallic bottom | Eliminates flux entrapment during reflow - ensures consistent solder wetting and void-free joints |
| Pb-free compliance | RoHS-compliant construction with "G"-suffix variants available - meets global environmental regulations without performance trade-offs |
Applications
| Smartphone Power Management | USB-C Port Protection |
|---|---|
Use Scenario: Regulating auxiliary supply rails for PMICs and sensor subsystems in sub-8mm-thick mobile handsets. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp for 5 V/3.3 V distributed power domains. Use Value: 1.1 mm profile enables placement beneath stacked PCBs; 3.2 W rating supports transient surge absorption without derating. | Use Scenario: Protecting USB-C controller I/O pins from ESD and bus overvoltage events during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance (≈10 pF) bidirectional clamping diode referenced to VCONN and CC lines. Use Value: Class 3 ESD immunity (>16 kV HBM) combined with 2.5 Ω ZZT ensures fast clamping response and minimal signal distortion. |
| Industrial Sensor Transmitter | POS Terminal Power Sequencing |
Use Scenario: Providing stable 6.8 V reference for 4–20 mA loop-powered temperature transmitters operating in −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Precision Zener reference with low TC drift and minimal leakage across wide temperature range. Use Value: ≤5 µA leakage at 5.2 V prevents loading of high-impedance op-amp feedback networks; −55°C to +150°C TJ rating ensures field reliability. | Use Scenario: Enabling controlled power-up sequencing of FPGA, display driver, and secure element ICs in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Voltage supervisor input clamp and brown-out detection threshold reference. Use Value: Tight 6.46–7.14 V tolerance ensures accurate reset assertion timing; 200 Ω ZZK supports reliable low-current sensing during startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5231BS-7-F | 250 mW SOT-23 device; VZ = 6.2 V ±5%, ZZT = 17 Ω @ 20 mA | Limited to low-power biasing; unsuitable for >500 mW transient suppression | Select when board space permits SOT-23 and power demand is <0.3 W |
| 1N4734A | 1 W DO-41 through-hole device; VZ = 5.6 V ±5%, ZZT = 10 Ω @ 45 mA | Requires through-hole assembly; no thermal tab for PCB heatsinking | Select only for legacy through-hole designs where rework to SMT is not feasible |
Compared with MMBZ5231BS-7-F and 1N4734A, the 1PMT5921BT1 uniquely combines 3.2 W power handling, 1.1 mm profile, and cathode-tab thermal path-enabling high-density, thermally robust voltage regulation unattainable with either alternative.
Availability
1PMT5921BT1 is available at Aetrix Electronics and suitable for smartphone power management, USB-C port protection, industrial sensor transmitters, and POS terminal power sequencing requiring stable component supply across high-volume production cycles.
Supply support for 1PMT5921BT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The 1PMT5920B Series was designed specifically for high-power-density, low-profile voltage regulation in portable and space-constrained electronics-prioritizing thermal efficiency, ESD robustness, and manufacturability in fine-pitch SMT processes.
FAQ
What is the Zener voltage tolerance of the 1PMT5921BT1?
The 1PMT5921BT1 has a Zener voltage range of 6.46 V to 7.14 V at IZT = 55.1 mA, corresponding to a ±5% tolerance around the nominal 6.8 V rating. This tolerance is guaranteed across the full operating temperature range of −55°C to +150°C and is measured under thermal equilibrium at 25°C ambient per the official onsemi datasheet.
Can the 1PMT5921BT1 be used in Pb-free reflow processes?
Yes, the 1PMT5921BT1 is compatible with Pb-free reflow soldering per JEDEC J-STD-020. Its maximum soldering temperature is rated at 260°C for 10 seconds, matching standard lead-free process profiles. The device is available in both standard and Pb-free versions ("G" suffix), and the POWERMITE package's full metallic bottom ensures reliable wetting and void-free joints.
How does the thermal performance of the 1PMT5921BT1 compare to SMA packages?
The 1PMT5921BT1 delivers equivalent thermal performance to SMA packages despite being 50% smaller in footprint area, due to its optimized POWERMITE package with integral heat sink tabs and low RJcathode of 23°C/W. This enables 3.2 W power dissipation at cathode temperature of 75°C-matching SMA capability while reducing PCB real estate and height.
What is the maximum reverse leakage current for the 1PMT5921BT1?
The maximum reverse leakage current for the 1PMT5921BT1 is 5.0 µA at VR = 5.2 V and TL = 25°C. This low leakage ensures minimal quiescent current draw in battery-powered applications and preserves accuracy in high-impedance reference circuits where even nanoampere-level currents could cause significant error.
Is the 1PMT5921BT1 suitable for ESD protection in high-speed interfaces?
The 1PMT5921BT1 is rated for Class 3 ESD immunity (>16 kV HBM), making it suitable for board-level ESD clamping in moderate-speed interfaces like USB-C CC lines or I²C buses. However, its capacitance (~10 pF at 0 V bias) and 2.5 Ω ZZT limit use in >100 MHz signal paths; for RF or high-speed data lines, dedicated low-capacitance TVS diodes are recommended instead of the 1PMT5921BT1.
1PMT5921BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 3.2 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 5.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Powermite
1PMT5921BT1 FAQ
1.How can I place an order for 1PMT5921BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5921BT1 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 1PMT5921BT1 reliable?
The price and inventory of 1PMT5921BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5921BT1 is usually 5 days.
3.What payment methods are accepted for 1PMT5921BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5921BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5921BT1?
1PMT5921BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5921BT1 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 1PMT5921BT1?
For technical support, including 1PMT5921BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5921BT1 requirements.
6.How does Aetrix verify that 1PMT5921BT1 is sourced from the original manufacturer or authorized distributors?
All 1PMT5921BT1 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 1PMT5921BT1 meets industry standards.
7.What is the process for return or replacement of 1PMT5921BT1?
All 1PMT5921BT1 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5921BT1, 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 1PMT5921BT1 part is unused and in its original packaging.
Return procedure for 1PMT5921BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5921BT1 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
