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Taiwan Semiconductor Corporation P6SMB24CA
- Part No.:
- P6SMB24CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB24CA.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,235
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Product details
Overview
P6SMB24CA from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power lines and signal paths. It features a standoff voltage of 20.5 V, breakdown voltage range of 22.8–25.2 V at 1 mA test current, clamping voltage of 33.2 V at 19 A peak pulse current, and operates across –55 °C to +150 °C junction temperature.
For engineers reviewing the P6SMB24CA datasheet, P6SMB24CA pinout, P6SMB24CA application, or P6SMB24CA equivalent, key selection criteria include bidirectional clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, low leakage (<1 µA @ 20.5 V), fast response (<1.0 ps), and DO-214AA (SMB) package compatibility with automated SMT assembly.
Technical Context
The P6SMB24CA implements a glass-passivated silicon avalanche junction optimized for unidirectional or bidirectional transient suppression without external polarity constraints. Its 600 W peak pulse power rating (10/1000 µs waveform) and 33.2 V clamping voltage at 19 A ensure reliable protection of downstream ICs during load dump or ESD events.
Thermal design is supported by a junction-to-ambient thermal resistance of 55 °C/W and junction-to-case resistance of 10 °C/W, enabling stable operation up to 150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 33.2 V @ 19 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPSM | 600 W - Peak pulse power handling capability; sets surge energy absorption limit per event |
| IR @ VWM | <1 µA - Reverse leakage at standoff voltage; ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient industrial or automotive under-hood environments |
| Response time | <1.0 ps - Time from 0 V to VBR(min); guarantees sub-nanosecond reaction to fast transients like ESD |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band marking omitted (bidirectional symmetry). Matte tin-plated leads, RoHS-compliant and halogen-free per IEC 61249-2-21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No fixed polarity - either terminal serves as anode or cathode depending on transient polarity; enables single-device protection of AC or floating DC lines |
| Case (exposed metal tab) | Thermal conduction path only | Non-electrical; provides mechanical anchoring and heat dissipation to PCB copper; no internal connection to die |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load dump and supply line transients without derating or external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-related popcorning risk |
| Low clamping ratio (VC/VBR(min) = 1.46) | Minimizes overvoltage overshoot during clamping, reducing stress on protected MOSFETs, controllers, or interface ICs |
Applications
| Automotive Power Distribution | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protection of 24 V battery-fed ECUs against load dump pulses (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across main input rails to clamp transients before DC-DC converters or microcontrollers. Use Value: Withstands 600 W surges while limiting rail voltage to ≤33.2 V, preventing latch-up or gate oxide damage in downstream 36 V-rated power stages. | Use Scenario: Input-stage surge suppression in 24 V industrial switch-mode power supplies subjected to lightning-induced line transients. IC Role / Device Role / Timing Role: Primary-line TVS connected between L/N and earth or across bulk capacitor inputs. Use Value: Fast <1.0 ps response captures early transient rise, and 33.2 V clamping preserves hold-up time margin for 24 V output regulation under surge conditions. |
| Consumer Monitor Power Board | Telecom Adapter Secondary Side |
Use Scenario: Overvoltage protection on 24 V auxiliary rails powering backlight inverters or display logic in flat-panel monitors. IC Role / Device Role / Timing Role: Localized TVS mounted near connector or regulator IC to suppress ESD and coupling noise from adjacent switching circuits. Use Value: Sub-1 µA leakage avoids loading low-current standby rails; DO-214AA footprint allows placement in tight board areas without compromising creepage/clearance. | Use Scenario: Secondary-side transient suppression in universal-input AC/DC adapters supplying 24 V to VoIP phones or small network devices. IC Role / Device Role / Timing Role: Bidirectional TVS across isolated 24 V output to absorb reflected transients from cable disconnect or hot-plug events. Use Value: Symmetrical clamping eliminates need for polarity-aware layout; 33.2 V VC stays safely below 36 V absolute maximum ratings of common PMICs and PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA (Bourns) | Same DO-214AA package, identical 24 V nominal breakdown, but rated for 600 W with VC = 38.9 V @ 15.4 A | Higher clamping voltage reduces margin for 24 V systems with tight VMAX limits (e.g., 28 V-rated regulators) | Select P6SMB24CA when lower clamping (33.2 V) is required to protect sensitive 24 V loads; SMBJ24CA may be preferred where higher IPPM headroom is needed despite higher VC |
| 1.5KE24CA (ON Semiconductor) | Through-hole DO-15 package, same 24 V rating, 600 W rating, VC = 36.0 V @ 16.7 A | Not surface-mountable; incompatible with automated SMT lines and space-constrained PCBs | Choose P6SMB24CA for new SMT designs requiring DO-214AA footprint; 1.5KE24CA remains viable only for legacy through-hole repair or prototyping |
Compared with SMBJ24CA and 1.5KE24CA, the P6SMB24CA delivers the lowest clamping voltage (33.2 V) in its class while maintaining full 600 W surge rating and DO-214AA compatibility-making it optimal for space-limited 24 V systems where voltage margin is critical.
Availability
P6SMB24CA is available at Aetrix Electronics and suitable for automotive power distribution, industrial SMPS input stages, and consumer monitor power boards requiring stable component supply with consistent parametric performance and full RoHS/halogen-free compliance.
Supply support for P6SMB24CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management components.
The P6SMB series belongs to TSC's high-reliability surface-mount TVS portfolio, engineered specifically for automotive and industrial applications demanding ISO 7637-2 compliance, extended temperature operation, and automated assembly readiness.
FAQ
What is the polarity configuration of the P6SMB24CA?
The P6SMB24CA is a bidirectional TVS diode, meaning it has no fixed anode or cathode designation. Its symmetrical construction allows it to clamp transients of either polarity across the same two terminals. This eliminates orientation concerns during PCB layout and makes it ideal for protecting AC-coupled signals or floating DC buses where voltage polarity may reverse. The P6SMB24CA achieves this via a back-to-back diode junction structure within a single DO-214AA package.
Does the P6SMB24CA meet automotive transient immunity standards?
Yes, the P6SMB24CA is explicitly rated to meet ISO 7637-2 for automotive electrical disturbances, covering Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupled noise). Its 600 W peak pulse power rating, fast <1.0 ps response, and 33.2 V clamping voltage at 19 A ensure robust protection against load dump and alternator ripple events in 24 V vehicle systems. Taiwan Semiconductor validates these characteristics per ANSI/IEEE C62.35 definitions.
What is the maximum clamping voltage of the P6SMB24CA under surge conditions?
The maximum clamping voltage of the P6SMB24CA is 33.2 V, measured at a peak pulse current (IPPM) of 19 A using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a worst-case transient event, directly determining the overvoltage stress imposed on downstream components. Engineers use this parameter to verify that protected ICs remain within their absolute maximum voltage ratings during surge conditions.
Can the P6SMB24CA be used in place of a unidirectional TVS like P6SMB24A?
No-the P6SMB24CA and P6SMB24A are electrically distinct: the "CA" suffix denotes bidirectional operation, while "A" alone indicates unidirectional with a defined cathode band. Substituting P6SMB24CA for P6SMB24A introduces reverse conduction during normal forward bias, potentially causing short-circuit behavior or unintended current paths. Always match suffixes: use P6SMB24CA only where bidirectional clamping is required, and P6SMB24A where polarity-sensitive protection (e.g., DC rail with known ground reference) is needed.
What is the thermal resistance profile of the P6SMB24CA, and how does it affect PCB layout?
The P6SMB24CA has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and junction-to-case resistance (RθJC) of 10 °C/W. These values indicate that effective PCB copper area-especially thermal pads connected to both terminals-is essential to maintain junction temperature below 150 °C under repeated surges. Layout best practices include using ≥100 mm² of 2 oz copper per terminal, minimizing trace length, and avoiding thermal isolation. The DO-214AA package's low mass also demands attention to solder joint integrity to prevent thermal fatigue during power cycling.
P6SMB24CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 19A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB24CA FAQ
1.How can I place an order for P6SMB24CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB24CA 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 P6SMB24CA reliable?
The price and inventory of P6SMB24CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB24CA is usually 5 days.
3.What payment methods are accepted for P6SMB24CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB24CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB24CA?
P6SMB24CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB24CA 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 P6SMB24CA?
For technical support, including P6SMB24CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB24CA requirements.
6.How does Aetrix verify that P6SMB24CA is sourced from the original manufacturer or authorized distributors?
All P6SMB24CA 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 P6SMB24CA meets industry standards.
7.What is the process for return or replacement of P6SMB24CA?
All P6SMB24CA units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB24CA, 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 P6SMB24CA part is unused and in its original packaging.
Return procedure for P6SMB24CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB24CA Tags
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