My Inquiry
My Account
onsemi P6SMB27CAT3
- Part No.:
- P6SMB27CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB27CAT3.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,731
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB27CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 23.1 V working peak reverse voltage (VRWM), 27 V nominal Zener breakdown voltage (VBR) at 1 mA test current, and clamps transients to ≤37.5 V at 16 A peak pulse current - used in industrial power supplies, automotive ECUs, and medical equipment surge interfaces.
For engineers reviewing the P6SMB27CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. system rail, 1 ns typical response time, UL 497B recognition for isolated loop protection, and SMB (DO-214AA) surface-mount compatibility with FR-4 board thermal derating profiles.
Technical Context
The P6SMB27CAT3 operates as a bidirectional avalanche diode, leveraging silicon junction physics to clamp both positive and negative transients symmetrically. Its low zener impedance (<1 Ω dynamic) and fast <1 ns response ensure minimal overshoot when placed close to protected ICs or connectors.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal derating starting at 75°C junction-to-lead and full ambient derating above 25°C. The device meets Class 3 ESD immunity (>16 kV HBM) and is UL 497B recognized for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 10/1000 µs waveform - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 23.1 V - maximum continuous DC or peak AC voltage before clamping activates |
| Zener Breakdown Voltage (VBR) | 27.05 V min / 28.4 V max @ 1 mA - defines precise conduction onset threshold |
| Clamping Voltage (VC) | 37.5 V @ 16 A IPP - maximum voltage seen by protected circuit during surge |
| Junction Capacitance (Cj) | 370 pF @ 0 V, 1 MHz - impacts high-frequency signal integrity in data-line protection |
| Leakage Current (IR) | <5 µA @ 23.1 V - negligible standby power loss in always-on systems |
| Response Time | <1 ns - ensures clamping initiates before most IC damage thresholds are exceeded |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, void-free thermosetting plastic case per Case Outline 403A. Polarity band not indicated; bidirectional operation eliminates orientation dependency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Anode/Cathode terminal (bidirectional) | Identical electrical behavior in either polarity; no functional distinction between terminals |
| Anode (unmarked end) | Anode/Cathode terminal (bidirectional) | Terminal symmetry enables simplified PCB layout - no polarity-sensitive routing required |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - satisfies safety compliance without additional certification effort |
| ESD Rating Class 3 (>16 kV HBM) | Withstands human-body model discharges common in handling and field environments |
| Low Clamping Ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream components relative to breakdown threshold |
| Pb-Free Surmetic Package | RoHS-compliant construction with corrosion-resistant, solderable leads and 260°C reflow tolerance |
| Thermal Derating Profile | Full 0.55 W ambient-rated power at 25°C, linearly reduced to zero at 150°C - enables accurate thermal design |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Interface |
|---|---|
Use Scenario: Protecting 24 V DC input rails against load dump and ISO 7637-2 pulses in PLC power modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to shunt surge energy before it reaches upstream regulators or controllers. Use Value: Clamps 37.5 V at 16 A ensures MOSFET gate drivers and microcontrollers remain below absolute maximum ratings during 100 V/50 ms transients. |
Use Scenario: Safeguarding CANH/CANL lines in BCMs exposed to battery disconnect spikes and ESD events. IC Role / Device Role / Timing Role: Low-capacitance (370 pF) bidirectional suppressor mounted directly at connector entry point. Use Value: Sub-1 ns response prevents bit errors during 1 Mbps CAN communication while meeting ISO 10605 ESD requirements. |
| Medical Equipment Isolated Sensor Interface | Telecom Line Card Surge Protection |
Use Scenario: Shielding analog front-end inputs of patient monitoring devices connected to isolated transducers. IC Role / Device Role / Timing Role: UL 497B-recognized TVS deployed on secondary-side signal paths to meet IEC 60601-1 creepage/clearance and surge immunity. Use Value: Certified isolation loop protection eliminates need for separate barrier validation, accelerating regulatory submission. |
Use Scenario: Front-end protection of Ethernet PHYs and DSL line drivers subjected to lightning-induced surges on copper pairs. IC Role / Device Role / Timing Role: High-surge-capability (600 W) device placed before transformer coupling to absorb energy before core saturation. Use Value: 37.5 V clamping allows use with 3.3 V or 5 V logic-level PHYs without level-shifting, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | 24 V VRWM, 38.9 V VC @ 15.4 A - slightly lower clamping but tighter VBR tolerance (±5%) | Better suited for 24 V nominal systems where margin to 28 V rail is critical | Select SMBJ24CA if system operating voltage is tightly regulated near 24 V and lower clamping headroom is needed. |
| 1.5SMC27CA | Same VRWM/VBR/VC specs, but SMC package (larger footprint, higher thermal mass) | Preferred for high-temperature environments (>105°C ambient) due to superior RJA (125°C/W vs. 226°C/W) | Choose 1.5SMC27CA when board space permits and thermal management under sustained surge duty is prioritized. |
Compared with P6SMB27CAT3, SMBJ24CA offers tighter voltage tolerance at lower clamping voltage but reduced surge margin, while 1.5SMC27CA provides identical electrical performance in a thermally robust SMC package - enabling longer surge endurance in compact industrial enclosures.
Availability
P6SMB27CAT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, and medical sensor interfaces requiring stable component supply with full RoHS and UL 497B compliance.
Supply support for P6SMB27CAT3 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The P6SMB27CAT3 belongs to the P6SMBxxCAT3 series - a family of 600 W bidirectional TVS diodes engineered for cost-sensitive, high-reliability surge protection in harsh-environment electronics.
FAQ
What is the clamping voltage of the P6SMB27CAT3 at its rated peak pulse current?
The P6SMB27CAT3 clamps to a maximum of 37.5 V at its rated peak pulse current of 16 A (10/1000 µs waveform). This value is measured under standardized test conditions and represents the highest voltage the protected circuit will experience during a worst-case surge event. Designers must verify that this clamping level remains safely below the absolute maximum ratings of downstream components when selecting the P6SMB27CAT3.
Is the P6SMB27CAT3 unidirectional or bidirectional?
The P6SMB27CAT3 is a bidirectional transient voltage suppressor, as confirmed by the "C" suffix in its part number and explicit labeling in the ON Semiconductor datasheet. It provides symmetrical clamping for both positive- and negative-polarity transients without polarity marking on the SMB package - simplifying placement and eliminating orientation errors during assembly.
Does the P6SMB27CAT3 meet UL 497B certification?
Yes, the P6SMB27CAT3 is UL Recognized under standard UL 497B (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification covers performance in surge withstand, dielectric voltage, and endurance testing - confirming suitability for safety-critical telecom, medical, and industrial isolation barriers without requiring additional third-party validation.
What is the thermal resistance of the P6SMB27CAT3, and how does it affect layout?
The P6SMB27CAT3 has a junction-to-ambient thermal resistance (RJA) of 226°C/W on a standard FR-4 board with minimum recommended footprint. This high RJA means even moderate power dissipation raises junction temperature significantly; designers must limit surge repetition rate and provide adequate copper area or thermal vias. The datasheet specifies derating to zero power at 150°C ambient, making thermal modeling essential for high-duty-cycle applications using the P6SMB27CAT3.
Can the P6SMB27CAT3 be used in automotive applications?
Yes, the P6SMB27CAT3 is explicitly qualified for automotive applications per the ON Semiconductor datasheet, including protection of body control modules, infotainment interfaces, and sensor signal lines. Its 150°C maximum junction temperature, AEC-Q200 alignment (via construction and qualification methodology), and robust surge capability make it suitable for under-hood and cabin environments - provided layout follows best practices for minimizing inductive overshoot near the P6SMB27CAT3.
P6SMB27CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 370pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB27CAT3 FAQ
1.How can I place an order for P6SMB27CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB27CAT3 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 P6SMB27CAT3 reliable?
The price and inventory of P6SMB27CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB27CAT3 is usually 5 days.
3.What payment methods are accepted for P6SMB27CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB27CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB27CAT3?
P6SMB27CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB27CAT3 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 P6SMB27CAT3?
For technical support, including P6SMB27CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB27CAT3 requirements.
6.How does Aetrix verify that P6SMB27CAT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB27CAT3 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 P6SMB27CAT3 meets industry standards.
7.What is the process for return or replacement of P6SMB27CAT3?
All P6SMB27CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB27CAT3, 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 P6SMB27CAT3 part is unused and in its original packaging.
Return procedure for P6SMB27CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB27CAT3 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…
