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Taiwan Semiconductor Corporation P6SMB43CA
- Part No.:
- P6SMB43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43CA.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,277
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Product details
Overview
P6SMB43CA from Taiwan Semiconductor is a bidirectional 600W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for robust overvoltage protection in DC power rails and signal lines. It features a standoff voltage of 36.8 V, breakdown voltage range of 40.9–45.2 V at 1 mA, clamping voltage of 59.3 V at 10.6 A peak pulse current, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b automotive surge immunity standards.
For engineers reviewing the P6SMB43CA datasheet, P6SMB43CA pinout, P6SMB43CA application, or P6SMB43CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1 µA @ 36.8 V), fast sub-1 ps response time, and compliance with automotive transients-critical when protecting CAN, LIN, or 12 V/24 V supply inputs against load dump and inductive switching events.
Technical Context
The P6SMB43CA operates as a bipolar avalanche diode, symmetrically clamping voltage surges in both forward and reverse directions without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and low leakage, while its thermal resistance (RθJA = 55 °C/W) supports operation up to +150 °C junction temperature under pulsed conditions.
Designed for unidirectional or bidirectional use (denoted by "C" or "CA" suffix), it delivers 600 W non-repetitive peak pulse power with a 10/1000 µs waveform, and exhibits a temperature coefficient of breakdown voltage of +0.101 %/°C-enabling predictable voltage shift across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC rail margin for 36 V nominal systems. |
| VBR (min/max) | 40.9 V / 45.2 V @ 1 mA - Verified breakdown threshold range; ensures reliable triggering above VWM with production tolerance. |
| VC @ IPPM | 59.3 V @ 10.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels in protected circuits. |
| IPPM | 10.6 A - Peak pulse current handling capacity; determines survivability against defined ISO 7637-2 transient waveforms. |
| PPPSM | 600 W - Non-repetitive peak pulse power rating; sets maximum energy absorption per event without failure. |
| IR @ VWM | <1 µA - Reverse leakage at rated standoff voltage; minimizes quiescent power loss and avoids false triggering in high-impedance nodes. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments with minimal derating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bidirectional configuration with cathode band omitted (no polarity marking required). Case material meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional clamping | Connected to protected line (e.g., CAN_H or 12 V rail); forms symmetrical clamp path with cathode. |
| Cathode | Current exit terminal in forward bias; common node for bidirectional clamping | Connected to reference (e.g., ground or CAN_L); completes low-impedance surge shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or floating lines (e.g., CAN bus) without external polarity constraints. |
| ISO 7637-2 compliance | Validated performance against Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling noise). |
| Glass passivated junction | Ensures long-term stability of VBR and low IR drift over temperature and lifetime-critical for automotive field reliability. |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry responds, preventing latch-up or gate oxide damage in connected ICs. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow; supports standard SMT assembly without special handling or dry pack. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V DC Power Input |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver pins from load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point, shunting surge energy to chassis ground. Use Value: Limits transient voltage to ≤59.3 V, ensuring connected CAN PHY (e.g., TJA1042) remains within absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding PLC input terminals and sensor power rails against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Primary overvoltage suppression device on 24 V supply line upstream of DC-DC converters and LDOs. Use Value: Absorbs 600 W pulses without degradation, maintaining system uptime in factory automation where relay coil switching occurs frequently. |
| Consumer LCD Monitor Power Supply | Telecom Remote Terminal Unit (RTU) |
Use Scenario: Shielding AC-DC adapter output and mainboard 12 V rail from ESD and lightning-induced surges entering via mains or USB ports. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary MOV, providing precise clamping where low VC is essential for downstream MOSFET gate protection. Use Value: Clamps to 59.3 V at 10.6 A-lower than competing 43 V unidirectional parts-reducing stress on 12 V-rated buck controller ICs. | Use Scenario: Protecting RS-485 communication ports and backup battery charging circuitry in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional surge protector on differential RS-485 lines (A/B), referenced to local ground plane. Use Value: Symmetric clamping prevents common-mode-to-differential mode conversion, preserving signal integrity during 1 kV/1 µs transients per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA (Bourns) | Identical DO-214AA package, same VWM/VBR/VC specs, but rated for 600 W with tighter VBR tolerance (±5% vs ±4.5% for P6SMB43CA). | Same ISO 7637-2 compliance; minor difference in leakage (<0.5 µA vs <1 µA) has no impact in typical 24 V rail protection. | Select SMBJ43CA if tighter VBR distribution is required for high-volume binning or margin-critical designs. |
| 1.5KE43CA (ON Semiconductor) | Higher-power through-hole (DO-201AD) variant: 1500 W rating, same VWM/VBR, but larger footprint and slower thermal response. | Not suitable for space-constrained SMT layouts; used where higher single-event energy absorption is prioritized over board area. | Choose 1.5KE43CA only when PCB real estate allows and >600 W pulse handling is mandatory-otherwise P6SMB43CA offers superior density and assembly compatibility. |
Compared with SMBJ43CA and 1.5KE43CA, the P6SMB43CA provides identical clamping performance in a cost-optimized SMB package with industry-standard moisture sensitivity level 1, making it ideal for high-volume automotive and industrial SMT production where assembly efficiency and thermal reliability are balanced.
Availability
P6SMB43CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V power supplies, and consumer display power systems requiring stable component supply, full traceability, and RoHS/halogen-free compliance.
Supply support for P6SMB43CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The P6SMB series is part of TSC's automotive-grade TVS portfolio, engineered specifically for robust transient immunity in 12 V/24 V vehicle networks and industrial control systems where reliability under harsh electrical environments is mandatory.
FAQ
What does the "CA" suffix indicate in P6SMB43CA?
The "CA" suffix denotes a bidirectional TVS diode with symmetrical clamping characteristics in both polarities. Unlike unidirectional variants (e.g., P6SMB43A), the P6SMB43CA has no cathode marking and functions identically for positive and negative transients-making it ideal for differential signal lines like CAN or RS-485. This is confirmed in the datasheet's "Devices for Bipolar Applications" section.
Does P6SMB43CA meet automotive surge immunity standards?
Yes, the P6SMB43CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements as explicitly stated in the "Features" section of the official Taiwan Semiconductor datasheet (Version Q2209). Its 600 W peak pulse rating and 59.3 V clamping voltage ensure compliance when applied per recommended layout guidelines with low-inductance grounding.
What is the maximum clamping voltage of P6SMB43CA under surge conditions?
The maximum clamping voltage of P6SMB43CA is 59.3 V at 10.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured and guaranteed per the Electrical Specifications table in the datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can P6SMB43CA be used in place of a unidirectional TVS like P6SMB43A?
No-P6SMB43CA is bidirectional and lacks polarity marking, whereas P6SMB43A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: P6SMB43CA is appropriate for floating or differential lines (e.g., CAN), while P6SMB43A suits grounded-rail protection (e.g., 12 V to GND). Interchange alters clamping behavior and may compromise protection.
Is P6SMB43CA compliant with RoHS and halogen-free requirements?
Yes, the P6SMB43CA is RoHS compliant and halogen-free per IEC 61249-2-21, as documented in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads satisfy J-STD-002 solderability standards-ensuring environmental and assembly compliance for global manufacturing.
P6SMB43CA 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 10.6A
- 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)
P6SMB43CA FAQ
1.How can I place an order for P6SMB43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43CA 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 P6SMB43CA reliable?
The price and inventory of P6SMB43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB43CA is usually 5 days.
3.What payment methods are accepted for P6SMB43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43CA?
P6SMB43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43CA 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 P6SMB43CA?
For technical support, including P6SMB43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43CA requirements.
6.How does Aetrix verify that P6SMB43CA is sourced from the original manufacturer or authorized distributors?
All P6SMB43CA 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 P6SMB43CA meets industry standards.
7.What is the process for return or replacement of P6SMB43CA?
All P6SMB43CA units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43CA, 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 P6SMB43CA part is unused and in its original packaging.
Return procedure for P6SMB43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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