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Taiwan Semiconductor Corporation P6SMB39CAH
- Part No.:
- P6SMB39CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAH.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,850
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Product details
Overview
P6SMB39CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 33.3 V, breakdown voltage range of 37.1–41.0 V at 1 mA, and clamping voltage of 53.9 V at 11.6 A peak pulse current. It features glass-passivated junction, AEC-Q101 qualification, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT immunity.
For engineers reviewing the P6SMB39CAH datasheet, P6SMB39CAH pinout, P6SMB39CAH application, or P6SMB39CAH equivalent, this device is selected for robust ESD and surge protection in automotive power rails, industrial sensor interfaces, and lighting control circuits where bidirectional clamping, low leakage (<1 µA), and fast sub-1 ps response are required.
Technical Context
The P6SMB39CAH operates as a bipolar TVS diode-symmetrical clamping in both forward and reverse directions-enabling protection of AC-coupled or floating signal lines without polarity concerns. Its DO-214AA (SMB) package supports automated placement and delivers 600 W non-repetitive peak pulse power handling per 10/1000 µs waveform.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, enabling reliable operation up to TJ = +150 °C. The device exhibits a VBR temperature coefficient of 0.100 %/°C and maintains <1 µA reverse leakage at 33.3 V, ensuring minimal standby power impact in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown. |
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 53.9 V at 11.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs. |
| PPPSM | 600 W - Peak pulse power rating; defines single-event surge energy absorption capability under standardized waveform. |
| IR @ VWM | <1 µA - Reverse leakage current; enables low-power system design with negligible standby drain. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| Package | DO-214AA (SMB) - Surface-mount outline with 0.090 g mass; compatible with standard reflow profiles and J-STD-002 solderability. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bidirectional P6SMB39CAH; terminals are symmetrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Clamping node | Both terminals function identically; no polarity marking required-enables flexible PCB layout and AC line protection. |
| Case | Thermal path | Exposed copper pad area serves as primary heat sink; requires thermal relief or direct copper pour for optimal RθJA performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-suitable for engine control, body electronics, and ADAS modules. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives; critical for high-humidity under-hood applications. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) requirements-reduces need for external filtering. |
| Sub-1 ps response time | Typical rise-time <1.0 ps from 0 V to VBR(min); protects sensitive analog front-ends and high-speed communication ICs before damage occurs. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive; eliminates brominated flame retardants without compromising UL 94V-0 flammability rating. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins against load-dump surges and battery reverse-connection events in 12 V vehicle subsystems. IC Role / Device Role: Bidirectional clamping element placed between power rail and ground, shunting transient energy away from downstream ICs. Use Value: Withstands 600 W pulses while limiting clamped voltage to 53.9 V-well below typical 60 V absolute maximum ratings of automotive MCUs and transceivers. | Use Scenario: Safeguarding 4–20 mA current-loop sensors and RS-485 nodes in factory automation against EFT bursts and lightning-induced surges on field wiring. IC Role / Device Role: Primary surge suppression component mounted at connector entry point, operating symmetrically across differential pairs or ungrounded signal lines. Use Value: Sub-1 ps response ensures clamping initiates before EFT edges (5 ns rise time) propagate into protected circuitry-preserving signal integrity and data accuracy. |
| LED Driver Overvoltage Protection | AC-DC Adapter Input Stage Protection |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers due to input overvoltage transients caused by switching noise or grid disturbances. IC Role / Device Role: Parallel-connected TVS across driver input capacitor, absorbing short-duration spikes without affecting steady-state regulation. Use Value: 33.3 V VWM provides 10% margin above nominal 30 V DC input while maintaining <1 µA leakage-no efficiency penalty during normal operation. | Use Scenario: Front-end protection of universal-input (90–264 VAC) AC-DC adapters against line-to-line and line-to-ground surges per IEC 61000-4-5. IC Role / Device Role: Secondary-level clamp after MOV and fuse, providing precise, repeatable clamping where MOV tolerance and degradation are unacceptable. Use Value: 53.9 V clamping voltage allows use with 35 V-rated bridge rectifiers and bulk capacitors-enabling smaller, lower-cost input stage designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | 36 V VWM, 40 V VBR(min), 58.1 V VC @ 10.3 A; same DO-214AA package and 600 W rating. | Higher clamping voltage increases stress on protected ICs; suitable only if system withstand voltage >58 V. | Select SMBJ36CA when higher VWM margin is needed for 36 V nominal rails, but verify downstream voltage tolerance. |
| 1.5SMC39CA | 39 V VWM, 43.3 V VBR(min), 60.2 V VC @ 10 A; DO-214AB (SMC) package-larger footprint and 1.5× thermal mass. | Requires PCB layout change; better thermal dissipation but incompatible with space-constrained SMB footprints. | Choose 1.5SMC39CA only if board real estate permits SMC and higher thermal capacity is required for repetitive surge duty. |
Compared with SMBJ36CA and 1.5SMC39CA, P6SMB39CAH offers tighter VBR tolerance (±5.2%), lower clamping voltage (53.9 V vs. ≥58.1 V), and DO-214AA compatibility-making it optimal for compact, automotive-grade designs requiring precise, low-stress protection.
Availability
P6SMB39CAH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and LED driver overvoltage protection requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for P6SMB39CAH 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, and rectifiers with global distribution and AEC-Q101 validation capabilities.
The P6SMB series targets high-reliability transient suppression in automotive, industrial, and lighting applications-designed specifically for surface-mount assembly, automated placement, and harsh-environment survivability.
FAQ
What does the 'CAH' suffix indicate in P6SMB39CAH?
The 'CAH' suffix denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional 'H' variants, P6SMB39CAH provides symmetrical clamping in both polarities-ideal for protecting AC-coupled signals or floating buses without polarity constraints. This designation is confirmed in TSC's ordering information and electrical specifications table.
Is P6SMB39CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
No-P6SMB39CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b only. Pulse 5a (load dump) requires higher energy handling (≥1000 W) and longer time constants; P6SMB39CAH's 600 W rating and 10/1000 µs waveform limit make it unsuitable. For load dump, consider higher-power alternatives like SMAJ40CA or dedicated load-dump suppressors.
What is the maximum allowable PCB trace length between P6SMB39CAH and the protected IC?
To maintain sub-1 ps effective response, PCB trace inductance must be minimized: keep total loop inductance ≤2 nH. For typical FR-4, this translates to ≤5 mm total trace length (including ground return) with 0.3 mm width and direct ground plane coupling. Longer traces degrade clamping speed and increase overshoot-verified via TSC's application note AN-102 on TVS layout best practices.
Does P6SMB39CAH require derating at elevated ambient temperatures?
Yes-P6SMB39CAH's peak pulse power must be derated linearly above 25 °C per Figure 2 in the datasheet: at 85 °C ambient, PPPSM drops to ~420 W (70% of 600 W). This is due to junction temperature limits (TJ ≤ 150 °C) and RθJA = 55 °C/W. System-level thermal modeling is recommended for sustained surge duty in hot environments.
Can P6SMB39CAH replace P6SMB39A in an existing design?
No-P6SMB39CAH is bidirectional with CAH suffix; P6SMB39A is unidirectional (no 'C') and lacks AEC-Q101 and halogen-free certifications. Electrical parameters differ: P6SMB39A has VWM = 31.6 V and VC = 56.4 V, while P6SMB39CAH specifies VWM = 33.3 V and VC = 53.9 V. Direct substitution may compromise protection level or violate automotive qualification requirements.
P6SMB39CAH 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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)
P6SMB39CAH FAQ
1.How can I place an order for P6SMB39CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAH 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 P6SMB39CAH reliable?
The price and inventory of P6SMB39CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAH is usually 5 days.
3.What payment methods are accepted for P6SMB39CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAH?
P6SMB39CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAH 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 P6SMB39CAH?
For technical support, including P6SMB39CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAH requirements.
6.How does Aetrix verify that P6SMB39CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAH 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 P6SMB39CAH meets industry standards.
7.What is the process for return or replacement of P6SMB39CAH?
All P6SMB39CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAH, 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 P6SMB39CAH part is unused and in its original packaging.
Return procedure for P6SMB39CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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