My Inquiry
My Account
onsemi P6SMB24AT3
- Part No.:
- P6SMB24AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB24AT3.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,329
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB24AT3 from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of DC power rails and signal lines. It features a 20.5 V working peak reverse voltage (VRWM), 24 V nominal Zener breakdown voltage (VBR) at 1 mA test current, clamps to ≤33.2 V at 18 A peak pulse current (IPP), and responds in <1 ns - making it suitable for protecting automotive power supplies, industrial I/O interfaces, and telecom line cards against ESD and lightning-induced surges.
For engineers reviewing the P6SMB24AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected IC absolute maximum ratings, surge current capability under 10/1000 µs waveform, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
The P6SMB24AT3 operates as a silicon avalanche diode with sharp Zener breakdown characteristics, optimized for fast transient suppression in unidirectional configurations. Its low zener impedance and sub-1 ns response time enable effective clamping of ESD (≥16 kV HBM) and surge events without significant overshoot when mounted with minimal trace inductance.
Thermal design relies on junction-to-lead resistance of 40 °C/W and 3.0 W DC power dissipation at 75 °C lead temperature. The device uses a thermoset plastic SURMETIC® package (Case 403A) with modified L-bend leads for robust solder joint reliability and 260 °C reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 20.5 V - Maximum continuous reverse operating voltage before leakage exceeds 5 µA; must be ≥ system DC rail voltage. |
| VBR @ IT = 1 mA | 22–25.2 V - Breakdown occurs within this range; ensures reliable turn-on during transients without premature conduction. |
| VC @ IPP = 18 A | ≤33.2 V - Clamped voltage during 10/1000 µs surge; must stay below protected IC's absolute max rating. |
| PPK | 600 W - Peak pulse power handling for non-repetitive 1 ms surges per IEC 61000-4-5. |
| IR @ VRWM | ≤5 µA - Low leakage preserves efficiency in high-impedance bias networks and battery-powered circuits. |
| Response Time | <1 ns - Enables suppression before sensitive logic or analog circuitry experiences overstress. |
| ESD Rating | Class 3 (>16 kV HBM) - Meets IEC 61000-4-2 Level 4 for system-level ESD immunity. |
| UL Recognition | UL 497B QVGQ2 - Certified for use in isolated loop circuit protection per safety standard. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.06–4.60 mm (E), 3.30–3.95 mm (D), 1.90–2.45 mm (A), 0.76–1.60 mm (L). RoHS-compliant Pb-free option available (P6SMB24AT3G).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point in protected circuit; defines current path during reverse surge. |
| Cathode | High-side clamp node | Connected to protected line (e.g., 24 V rail); conducts avalanche current to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles IEC 61000-4-5 surge currents up to 18 A (10/1000 µs) without degradation. |
| 20.5 V VRWM with 24 V VBR | Provides 14% margin above nominal 24 V systems while avoiding false triggering during normal operation. |
| Clamping voltage ≤33.2 V | Ensures safe operation for 3.3 V/5 V logic interfaces powered from 24 V via LDO or DC-DC converter. |
| UL 497B certified | Validated for use in safety-critical isolated loop applications including process control and medical equipment interfaces. |
| Sub-1 ns response time | Minimizes voltage overshoot in high-speed data lines and microcontroller I/O protection schemes. |
| Pb-free SURMETIC® package | Enables lead-free reflow assembly with 260 °C / 10 s soldering tolerance and corrosion-resistant finish. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module Power Rail |
|---|---|
Use Scenario: 24 V DC input channels in programmable logic controllers exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between field input and isolation barrier to clamp transients before optocoupler or digital isolator. Use Value: Limits voltage to ≤33.2 V during 18 A surges, preserving isolation integrity and preventing latch-up in downstream interface ICs. |
Use Scenario: 24 V supply rail feeding microcontrollers and CAN transceivers in body electronics modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry, coordinated with upstream fuse and secondary LC filtering. Use Value: Survives ISO 7637-2 Pulse 5a (load dump) with 600 W peak power rating and maintains VRWM margin over temperature drift. |
| Telecom Line Card Surge Protection | Medical Equipment Isolated Sensor Interface |
Use Scenario: Protection of RS-485 transceivers and Ethernet PHYs on base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on differential pair inputs, paired with common-mode chokes and secondary GDTs. Use Value: Fast <1 ns response prevents damage to high-speed transceivers; UL 497B certification supports safety agency approvals. |
Use Scenario: Input protection for isolated analog front-ends measuring patient-connected sensors in diagnostic devices. IC Role / Device Role / Timing Role: Secondary clamp on isolated side of digital isolators or isolated ADCs, ensuring no fault propagation across barrier. Use Value: Low leakage (<5 µA) avoids signal offset errors; UL 497B recognition validates use in patient-connected circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Same SMB package, identical VRWM (20.5 V), VBR (22–25.2 V), and VC (33.2 V), but rated for 600 W with tighter VBR tolerance (±5%). | No functional difference in clamping performance; preferred where tighter parametric consistency is required for production binning. | Select SMBJ24A if tighter VBR distribution improves yield in high-volume manufacturing with narrow voltage margin designs. |
| 1.5SMC24A | Larger SMC package (7.1 × 6.2 mm), higher thermal mass, same electrical specs but 1.5 kW peak power rating and 100 A IFSM. | Better suited for high-energy environments (e.g., motor drives) where sustained surge repetition or higher single-pulse energy is expected. | Choose 1.5SMC24A only when board space allows and thermal derating or multi-pulse endurance exceeds SMB-class requirements. |
Compared with SMBJ24A, P6SMB24AT3 offers identical protection performance in a cost-optimized SMB footprint; compared with 1.5SMC24A, it trades peak energy capacity for smaller size and lower parasitic inductance - critical for high-frequency transient suppression.
Availability
P6SMB24AT3 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control module power rails, and telecom line card surge protection requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for P6SMB24AT3 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and communications markets.
The P6SMB24AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered for high-reliability overvoltage protection in harsh environments - emphasizing surge robustness, UL safety certification, and surface-mount manufacturability.
FAQ
What is the working peak reverse voltage (VRWM) of the P6SMB24AT3?
The P6SMB24AT3 has a VRWM of 20.5 V, meaning it can withstand up to this DC or continuous peak reverse voltage without exceeding 5 µA leakage current. This value ensures compatibility with nominal 24 V systems while providing sufficient margin against ripple and tolerance drift - a critical parameter when selecting the P6SMB24AT3 for power rail protection.
How does the clamping voltage (VC) of the P6SMB24AT3 compare to its breakdown voltage (VBR)?
The P6SMB24AT3 exhibits a VBR range of 22–25.2 V at 1 mA test current, while its maximum clamping voltage VC is 33.2 V at 18 A peak pulse current. This ~37% overvoltage margin reflects the diode's dynamic impedance during surge conduction and must be verified against the absolute maximum ratings of downstream components protected by the P6SMB24AT3.
Is the P6SMB24AT3 certified for safety standards applicable to industrial equipment?
Yes, the P6SMB24AT3 carries UL 497B recognition (File #E210057, Category QVGQ2) for isolated loop circuit protection - covering tests such as strike voltage breakdown, endurance conditioning, and dielectric withstand. This certification directly supports compliance efforts for the P6SMB24AT3 in industrial control panels and process automation hardware.
What is the thermal resistance and power derating behavior of the P6SMB24AT3?
The P6SMB24AT3 has a junction-to-lead thermal resistance (RJL) of 40 °C/W and a DC power dissipation (PD) of 3.0 W at 75 °C lead temperature, derating linearly above that point. Its junction-to-ambient resistance (RJA) is 226 °C/W on FR-4 board with minimum recommended footprint - essential for calculating safe operating area when using the P6SMB24AT3 in thermally constrained layouts.
Can the P6SMB24AT3 be used in bidirectional signal line protection?
No - the P6SMB24AT3 is strictly unidirectional and intended for DC rail or single-polarity signal protection. For bidirectional applications like AC lines or differential data buses, ON Semiconductor specifies separate parts (e.g., P6SMB24CAT3); substituting the P6SMB24AT3 would result in improper clamping during negative transients and potential device failure.
P6SMB24AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 18A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 775pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB24AT3 FAQ
1.How can I place an order for P6SMB24AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB24AT3 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 P6SMB24AT3 reliable?
The price and inventory of P6SMB24AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB24AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB24AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB24AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB24AT3?
P6SMB24AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB24AT3 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 P6SMB24AT3?
For technical support, including P6SMB24AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB24AT3 requirements.
6.How does Aetrix verify that P6SMB24AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB24AT3 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 P6SMB24AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB24AT3?
All P6SMB24AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB24AT3, 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 P6SMB24AT3 part is unused and in its original packaging.
Return procedure for P6SMB24AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB24AT3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
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…
