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Taiwan Semiconductor Corporation P4SMA39CAH
- Part No.:
- P4SMA39CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39CAH.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,440
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Product details
Overview
P4SMA39CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with a working stand-off voltage of 33.3 V, breakdown voltage range 37.1–41.0 V at 1 mA, and clamping voltage of 53.9 V at 7.7 A (10/1000 µs waveform). It is AEC-Q101 qualified and used for surge protection in automotive DC/DC converters.
For engineers reviewing the P4SMA39CAH datasheet, P4SMA39CAH pinout, P4SMA39CAH application, or P4SMA39CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 pulse immunity, moisture sensitivity level (MSL 1), TJ max = 150°C, and compatibility with automated SMT placement on power rails requiring ±39 V transient suppression.
Technical Context
The P4SMA39CAH implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 33.3 V). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal/power lines without polarity constraints.
Designed per ANSI/IEEE C62.35, it delivers 400 W peak pulse power under 10/1000 µs waveform, with thermal derating above 25°C per Fig.2 and compliance to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for automotive electronics robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below breakdown |
| VBR min/max | 37.1 V / 41.0 V @ 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients |
| VC @ IPPM | 53.9 V @ 7.7 A (10/1000 µs) - Clamped voltage seen by protected circuit; limits downstream stress |
| PPPM | 400 W - Peak surge energy handling capacity; supports high-energy automotive load dump events |
| IR @ VWM | <1 µA - Negligible standby power loss and minimal impact on high-impedance sensing nodes |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and thermally constrained PCB layouts |
| Package | DO-214AC (SMA) - Standardized SMT footprint compatible with IPC-7351B; supports reflow and wave soldering |
Pinout & Package
DO-214AC (SMA) package: surface-mount, molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation means band denotes common reference point, not unidirectional polarity).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Transient current path terminal | Bidirectional conduction path - either terminal serves as anode or cathode depending on transient polarity; no fixed polarity assignment |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and mechanical anchoring; no electrical connection or thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive-grade deployment including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Enhanced long-term stability and reduced parameter drift under thermal/humidity stress |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive ICs experience overstress |
| ISO 7637-2 compliance | Guaranteed immunity to standardized automotive electrical disturbances (Pulse 1/2a/2b/3a/3b) |
| MSL Level 1 | Zero floor life limitation - can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting 12 V/24 V input rails of buck-derived DC/DC modules in engine control units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input terminals to shunt transient energy before upstream regulator ICs. Use Value: Limits voltage excursion to ≤53.9 V during 400 W pulses, preserving MOSFET gate oxide integrity and preventing controller latch-up. | Use Scenario: Safeguarding primary-side rectifier outputs in industrial switch-mode power supplies exposed to line transients and switching noise. IC Role / Device Role / Timing Role: Transient suppression device mounted directly at rectifier output node to absorb repetitive surge energy. Use Value: Maintains <1 µA leakage at 33.3 V stand-off, avoiding efficiency loss while clamping spikes within 1.0 ps to protect downstream PWM controllers. |
| LED Driver Power Input | Automotive Body Control Module (BCM) I/O |
Use Scenario: Securing constant-current LED driver inputs in exterior lighting systems subjected to battery reversal and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector placed between input capacitor and driver IC supply pin. Use Value: Withstands repeated 10/1000 µs surges up to 400 W without degradation, ensuring >10-year field reliability in headlamp assemblies. | Use Scenario: Protecting LIN bus transceivers and sensor interfaces in BCMs from coupled transients via shared power domains. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between VCC and GND to suppress common-mode surges entering through power pins. Use Value: MSL Level 1 rating allows direct placement into high-volume SMT lines without moisture bake, reducing manufacturing cost and cycle time. |
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 | 600 W rating, higher VC = 58.1 V @ 10.3 A, same DO-214AA (SMB) package | Better energy handling but larger footprint; requires layout change | Select when higher surge margin is needed and board space permits SMB package |
| 1.5SMC39CA | 1500 W rating, VC = 60.7 V @ 24.5 A, DO-214AB (SMC) package | Higher power capability but 3× larger footprint and higher thermal mass | Choose for heavy-duty industrial surge zones where 400 W is insufficient |
Compared with P4SMA39CAH, SMBJ36CA offers +50% peak power but increases clamping voltage and requires PCB redesign, while 1.5SMC39CA delivers >3× energy capacity at the cost of size and thermal response - making P4SMA39CAH optimal for space-constrained AEC-Q101-compliant automotive modules needing precise 33.3 V stand-off.
Availability
P4SMA39CAH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switch-mode power supplies, and LED driver input protection requiring stable component supply and full traceability.
Supply support for P4SMA39CAH 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 AEC-Q101 certification capabilities.
The P4SMA series targets automotive and industrial transient suppression, engineered for high-reliability surface-mount integration with emphasis on ISO 7637-2 compliance, MSL Level 1 handling, and glass-passivated junction stability.
FAQ
What is the maximum clamping voltage of the P4SMA39CAH under standard test conditions?
The P4SMA39CAH has a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 µs impulse current of 7.7 A. This value is measured per ANSI/IEEE C62.35 and represents the peak voltage seen across the device during worst-case transient events - critical for ensuring downstream components remain within their absolute maximum ratings. The P4SMA39CAH maintains this clamping performance consistently across its qualified temperature range.
Is the P4SMA39CAH suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the P4SMA39CAH is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD. Its compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b further validates suitability for automotive power networks. The P4SMA39CAH is routinely deployed in engine control units and body control modules where such certification is mandatory.
What does the "CAH" suffix indicate in P4SMA39CAH?
The "CAH" suffix in P4SMA39CAH denotes a bidirectional configuration with A-grade tolerance (tighter VBR spread: 37.1–41.0 V vs. 35.1–42.9 V for "CH") and halogen-free molding compound per IEC 61249-2-21. It confirms symmetric clamping behavior in both polarities and RoHS/REACH compliance. The P4SMA39CAH is not interchangeable with unidirectional variants like P4SMA39H due to fundamental circuit topology differences.
Does the P4SMA39CAH require moisture sensitivity baking before SMT assembly?
No, the P4SMA39CAH is rated Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and may be placed directly onto PCBs without pre-bake. This eliminates process steps and reduces risk of thermal damage during reflow - a key advantage for high-throughput automotive electronics manufacturing where the P4SMA39CAH is commonly used.
How does the P4SMA39CAH compare to the unidirectional P4SMA39AH in terms of electrical behavior?
The P4SMA39CAH is bidirectional with symmetrical VBR (37.1–41.0 V) and VC (53.9 V) in both directions, whereas P4SMA39AH is unidirectional with forward conduction only. The P4SMA39CAH replaces two unidirectional devices in AC-coupled or floating circuits, simplifying layout and reducing BOM count. Its cathode band marking serves as a reference point, not polarity indicator - unlike the P4SMA39AH which requires strict orientation.
P4SMA39CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- 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):
- 7.7A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
P4SMA39CAH FAQ
1.How can I place an order for P4SMA39CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39CAH 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 P4SMA39CAH reliable?
The price and inventory of P4SMA39CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39CAH is usually 5 days.
3.What payment methods are accepted for P4SMA39CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39CAH?
P4SMA39CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39CAH 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 P4SMA39CAH?
For technical support, including P4SMA39CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39CAH requirements.
6.How does Aetrix verify that P4SMA39CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA39CAH 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 P4SMA39CAH meets industry standards.
7.What is the process for return or replacement of P4SMA39CAH?
All P4SMA39CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39CAH, 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 P4SMA39CAH part is unused and in its original packaging.
Return procedure for P4SMA39CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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