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Taiwan Semiconductor Corporation P6SMB43CAH
- Part No.:
- P6SMB43CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43CAH.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,596
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Product details
Overview
P6SMB43CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with a minimum breakdown voltage of 40.9 V, maximum clamping voltage of 59.3 V at 10.6 A peak pulse current, and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the P6SMB43CAH datasheet, P6SMB43CAH pinout, P6SMB43CAH application, or P6SMB43CAH equivalent, this device is selected for high-reliability ESD and surge protection in automotive power rails, CAN bus interfaces, and lighting control modules where low leakage (<1 µA @ 36.8 V), fast response (<1.0 ps), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are critical.
Technical Context
The P6SMB43CAH is a bipolar TVS diode designed for symmetrical transient suppression in both forward and reverse directions, meeting ISO 7637-2 immunity requirements for automotive electronics. Its glass-passivated junction ensures stable breakdown characteristics, while its 10 °C/W junction-to-case thermal resistance supports sustained surge handling under elevated ambient conditions.
With a standoff voltage of 36.8 V and clamping voltage of 59.3 V at 10.6 A (10/1000 µs waveform), it provides precise overvoltage protection margin for 36 V nominal systems. Its temperature coefficient of breakdown voltage is 0.101 %/°C - enabling predictable performance across –55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V - defines guaranteed conduction onset window under 1 mA test current; ensures robust margin above 36 V system rail. |
| VWM | 36.8 V - maximum continuous reverse working voltage; sets safe DC operating ceiling without leakage degradation. |
| VC @ IPPM | 59.3 V @ 10.6 A - clamped voltage during 10/1000 µs surge; limits downstream IC stress to <60 V in 36 V systems. |
| PPPSM | 600 W - non-repetitive peak pulse power rating; supports single-event transients up to 600 W without failure. |
| IR @ VWM | <1 µA - ultra-low reverse leakage at rated standoff voltage; preserves battery life and signal integrity in always-on circuits. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with 0.090 g mass; compatible with automated SMT placement and reflow. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation uses symmetric marking; no functional anode/cathode distinction). Weight: 0.090 g. Meets UL 94V-0 flammability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically; connected across protected line and ground (or between differential lines) without polarity constraint. |
| Case | Thermal & mechanical interface | Exposed copper pad area serves as primary heat sink; requires adequate PCB copper pour for thermal derating per RθJA = 55 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal stress and humidity exposure. |
| ISO 7637-2 compliance | Guaranteed immunity to standardized automotive transients (Pulse 1: inductive load dump; Pulse 2a/2b: supply interruption; Pulse 3a/3b: switching noise) without external circuitry. |
| Fast response time | <1.0 ps rise time from 0 V to VBR(min) - clamps ESD and fast transients before sensitive logic or analog inputs are damaged. |
| Low-profile SMB package | Height ≤ 2.6 mm - enables compact layout in space-constrained automotive ECUs and LED driver modules. |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12 V/24 V/36 V battery-fed microcontrollers and power management ICs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between power rail and chassis ground to divert surge energy away from downstream regulators and MCUs. Use Value: Clamps 36 V nominal rail surges to ≤59.3 V, preserving 5 V/3.3 V LDO input ratings and preventing brownout-induced resets. | Use Scenario: Safeguarding high-speed CAN FD transceivers against ESD events and coupled transients on differential bus lines. IC Role / Device Role / Timing Role: Paired back-to-back configuration across CAN_H–CAN_L or line-to-ground to suppress common-mode and differential-mode transients. Use Value: Sub-1 ps response ensures clamping occurs before CAN bit timing (≥125 ns/bit at 8 Mbps) is disrupted, maintaining bus integrity. |
| LED Headlamp Driver Protection | Industrial Sensor Interface Protection |
Use Scenario: Shielding constant-current LED drivers from inductive kickback during PWM dimming and relay switching in automotive lighting. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to absorb flyback energy from LED string inductance. Use Value: 600 W peak power rating handles repetitive PWM-edge transients without thermal runaway; 0.101 %/°C VBR TC ensures stable threshold across under-hood temperature swings. | Use Scenario: Securing 4–20 mA current-loop sensors and RS-485 nodes in factory automation against lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Line-to-ground TVS on each signal conductor to limit common-mode overvoltage entering analog front-end or transceiver ICs. Use Value: 59.3 V clamping protects 36 V-rated industrial transceivers; moisture sensitivity level 1 enables standard SMT assembly without dry-pack handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | 400 W peak power rating (vs. 600 W); same VBR range and DO-214AC (SMA) package. | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) in 24 V systems. | Select SMAJ43CA only when board space allows smaller SMA footprint and surge energy is confirmed ≤400 W. |
| 1.5SMC43CA | 600 W rating but DO-214AB (SMC) package (higher profile, larger pad area); identical VBR/VC specs. | Requires larger PCB real estate and higher reflow thermal mass; better suited for high-volume industrial boards than space-constrained automotive modules. | Choose 1.5SMC43CA when thermal dissipation >600 W pulses is required and height constraints allow ≥2.8 mm profile. |
Compared with SMAJ43CA and 1.5SMC43CA, P6SMB43CAH delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and low-profile SMB packaging - making it the preferred choice for automotive ECU designs requiring validated reliability and compact layout.
Availability
P6SMB43CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting control, and CAN bus protection requiring stable component supply and full traceability.
Supply support for P6SMB43CAH 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-compliant product lines.
The P6SMB43CAH belongs to TSC's P6SMBx(A)H family of automotive-grade TVS diodes, engineered specifically for robust transient immunity in harsh automotive environments - emphasizing low leakage, precise clamping, and ISO 7637-2 compliance.
FAQ
What is the breakdown voltage range of the P6SMB43CAH?
The P6SMB43CAH has a guaranteed breakdown voltage range of 40.9 V to 45.2 V at 1 mA test current (VBR min/max), measured per ANSI/IEEE C62.35. This range ensures reliable conduction onset above the 36.8 V standoff voltage while maintaining margin against false triggering in noisy 36 V automotive systems.
Is the P6SMB43CAH suitable for bidirectional transient protection?
Yes, the P6SMB43CAH is explicitly designed for bidirectional operation, as indicated by the "CAH" suffix and confirmed in the datasheet: "Electrical characteristics apply in both directions." It functions identically in forward and reverse bias, making it ideal for protecting differential buses like CAN or ungrounded AC-coupled signal paths without polarity concerns.
Does the P6SMB43CAH meet automotive qualification standards?
Yes, the P6SMB43CAH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction - including glass-passivated junction, JESD 201 Class 2 whisker resistance, and moisture sensitivity level 1 - satisfies automotive production and reliability mandates.
What is the maximum clamping voltage of the P6SMB43CAH during a surge event?
The P6SMB43CAH clamps to a maximum of 59.3 V at 10.6 A peak pulse current (10/1000 µs waveform). This value is specified in the Electrical Specifications table and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can the P6SMB43CAH be used in industrial applications outside automotive?
Yes, the P6SMB43CAH is widely deployed in industrial settings such as 4–20 mA sensor interfaces, RS-485 networks, and PLC I/O modules. Its 600 W surge rating, –55 °C to +150 °C operating range, and RoHS/halogen-free compliance make it suitable for factory automation, energy metering, and outdoor equipment exposed to lightning-induced surges.
P6SMB43CAH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB43CAH FAQ
1.How can I place an order for P6SMB43CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43CAH 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 P6SMB43CAH reliable?
The price and inventory of P6SMB43CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB43CAH is usually 5 days.
3.What payment methods are accepted for P6SMB43CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43CAH?
P6SMB43CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43CAH 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 P6SMB43CAH?
For technical support, including P6SMB43CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43CAH requirements.
6.How does Aetrix verify that P6SMB43CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB43CAH 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 P6SMB43CAH meets industry standards.
7.What is the process for return or replacement of P6SMB43CAH?
All P6SMB43CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43CAH, 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 P6SMB43CAH part is unused and in its original packaging.
Return procedure for P6SMB43CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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