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Vishay General Semiconductor - Diodes Division P6SMB24A-E3/5B
- Part No.:
- P6SMB24A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB24A-E3/5B.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB24A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), 33.2 V clamping voltage at 18.1 A peak pulse current, 600 W peak pulse power (10/1000 μs), and operates across -65 °C to +150 °C junction temperature range - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P6SMB24A-E3/5B datasheet, P6SMB24A-E3/5B pinout, P6SMB24A-E3/5B application, or P6SMB24A-E3/5B equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity marking (cathode band), and compliance with AEC-Q101 when using HE3/HM3 variants - all verified per Vishay Document 88370 (Rev. 09-Jan-2024).
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR (22.8–25.2 V at 1 mA test current). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with power dissipation derated linearly above 25 °C ambient per Figure 2. The device meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak, making it compatible with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit operation. |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Voltage at which device enters avalanche conduction; defines turn-on threshold under transient stress. |
| VC (Clamping) | 33.2 V at 18.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; must stay below downstream IC's absolute max rating. |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against standardized lightning/surge waveforms. |
| IPPM | 18.1 A - Corresponding peak pulse current at VC; used to size PCB trace width and verify layout current capacity. |
| TJ max. | +150 °C - Maximum junction temperature; constrains thermal design and long-term reliability under repeated surge events. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under DC leakage or repetitive pulses. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by a band on the body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode (unbanded end) | Reference / return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure. |
| Clamping voltage ≤33.2 V at 18.1 A | Provides safe margin below 36 V-rated logic and analog ICs, preventing latch-up or oxide damage. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without preconditioning or special handling. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive-grade reliability requirements for engine control and ADAS sensors. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for long-term field reliability. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role: Unidirectional shunt clamp placed between signal line and chassis ground, absorbing energy before it reaches the transceiver input. Use Value: Limits transient voltage to ≤33.2 V, preserving signal integrity and preventing permanent damage to 3.3 V/5 V interface ICs rated for 36 V absolute max. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and contactors in factory automation. IC Role / Device Role: Parallel-connected TVS on 24 V DC input lines, clamping spikes generated during relay coil de-energization. Use Value: Withstands 600 W surges at 18.1 A, enabling reliable operation without fuse blowing or controller reset during frequent switching cycles. |
| Consumer Power Adapter Output | Telecom Line Card Surge Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V USB-C PD adapter outputs to prevent damage to connected devices during regulator fault conditions. IC Role / Device Role: Standoff-rated (20.5 V) unidirectional clamp that remains non-conductive during normal regulation but activates within nanoseconds during fault. Use Value: Low leakage (<1 μA at VWM) avoids loading regulation loop; fast response prevents overshoot propagation to downstream USB ports. |
Use Scenario: Front-end protection on Ethernet PHY or DSL line interface cards subjected to induced lightning surges per ITU-T K.21 Basic Level. IC Role / Device Role: First-stage transient suppressor on twisted-pair inputs, working in coordination with gas discharge tubes and common-mode chokes. Use Value: 33.2 V clamping ensures differential-mode transients remain below PHY IC's 36 V tolerance, reducing need for costly secondary protection stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A (Microchip) | Same SMB package, identical VWM/VC specs (20.5 V / 33.2 V), but rated for 400 W PPPM (vs. 600 W). | Limited to lower-energy surge environments (e.g., IEC 61000-4-2 ESD only); not recommended for IEC 61000-4-5 line surges. | Select SMAJ24A only if system-level testing confirms 400 W suffices and cost is prioritized over margin. |
| 1.5SMC24A (ON Semiconductor) | Same electrical specs and SMB footprint, but higher RθJA (120 °C/W vs. 100 °C/W) and no AEC-Q101 option. | Reduced thermal headroom in high-ambient enclosures; unsuitable for automotive qualification programs. | Choose 1.5SMC24A for commercial-grade industrial use where AEC-Q101 is not required and board space allows same footprint. |
Compared with SMAJ24A and 1.5SMC24A, the P6SMB24A-E3/5B delivers higher surge robustness (600 W), better thermal performance (100 °C/W), and AEC-Q101-qualified variants - making it the preferred choice for automotive and high-reliability industrial designs demanding validated surge endurance.
Availability
P6SMB24A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapter outputs, and telecom line card surge protection requiring stable component supply, RoHS-compliant packaging, and consistent tape-and-reel delivery.
Supply support for P6SMB24A-E3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in space-constrained SMT designs, delivering 600 W surge capability in the compact SMB package for automotive, industrial, and communications infrastructure applications.
FAQ
What is the clamping voltage of the P6SMB24A-E3/5B under a 10/1000 μs surge?
The P6SMB24A-E3/5B has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 18.1 A with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88370 and represents the highest voltage the protected circuit will experience during such a transient. Engineers must ensure this clamping level stays below the absolute maximum rating of downstream components. The P6SMB24A-E3/5B achieves this while maintaining low leakage and fast response.
Is the P6SMB24A-E3/5B suitable for automotive applications?
The P6SMB24A-E3/5B itself is RoHS-compliant commercial grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like P6SMB24AHE3_B. These variants undergo extended reliability testing including temperature cycling, humidity bias, and surge endurance validation per automotive standards. For production automotive use, specify the HE3 or HM3 suffix - the P6SMB24A-E3/5B is appropriate for prototyping or non-automotive industrial applications where AEC-Q101 is not mandated.
How does the P6SMB24A-E3/5B differ from bidirectional TVS diodes like P6SMB24CA?
The P6SMB24A-E3/5B is unidirectional and features a cathode band for polarity identification, allowing it to conduct only in reverse bias - ideal for DC power rails and single-polarity signal lines. In contrast, P6SMB24CA is bidirectional with no polarity marking and symmetric clamping in both directions, suited for AC lines or differential buses like RS-485. Their VWM, VBR, and VC values differ accordingly: P6SMB24A-E3/5B has VWM = 20.5 V, while P6SMB24CA has VWM = 20.5 V (bidirectional), but distinct breakdown symmetry. Select based on circuit polarity requirements.
What is the thermal resistance of the P6SMB24A-E3/5B, and how does it affect layout?
The P6SMB24A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88370. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, risking thermal runaway during repetitive surges. Layout must allocate sufficient copper area and avoid thermal isolation - the P6SMB24A-E3/5B relies on PCB copper for heat dissipation during transient events.
Can the P6SMB24A-E3/5B be used in place of older P6KE24A through direct replacement?
No - the P6SMB24A-E3/5B is not a direct replacement for through-hole P6KE24A due to fundamental differences in package (SMB vs. DO-15), thermal behavior (RθJA = 100 °C/W vs. ~50 °C/W), and mounting method. While both share similar VWM/VC specs, the P6SMB24A-E3/5B requires SMT reflow and smaller PCB real estate. Substitution demands full layout revision, thermal validation, and surge testing. Use P6SMB24A-E3/5B only in new SMT designs or when migrating legacy through-hole boards to surface-mount architecture.
P6SMB24A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 18.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB24A-E3/5B FAQ
1.How can I place an order for P6SMB24A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB24A-E3/5B 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 P6SMB24A-E3/5B reliable?
The price and inventory of P6SMB24A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB24A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB24A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB24A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB24A-E3/5B?
P6SMB24A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB24A-E3/5B 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 P6SMB24A-E3/5B?
For technical support, including P6SMB24A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB24A-E3/5B requirements.
6.How does Aetrix verify that P6SMB24A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB24A-E3/5B 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 P6SMB24A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB24A-E3/5B?
All P6SMB24A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB24A-E3/5B, 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 P6SMB24A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB24A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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