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Taiwan Semiconductor Corporation P4SMA120CAH
- Part No.:
- P4SMA120CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120CAH.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,653
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Product details
Overview
P4SMA120CAH 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 97.2 V, breakdown voltage range 108–132 V at 1 mA, and clamping voltage of 165 V at 2.5 A peak pulse current (10/1000 μs). It is AEC-Q101 qualified and used for surge protection in automotive DC/DC converters.
For engineers reviewing the P4SMA120CAH datasheet, P4SMA120CAH pinout, P4SMA120CAH application, or P4SMA120CAH equivalent, this page delivers verified electrical specs, bidirectional TVS behavior, ISO 7637-2 compliance, moisture sensitivity level 1, and direct replacement guidance for automotive-grade transient suppression.
Technical Context
The P4SMA120CAH is a bipolar (bidirectional) TVS diode designed to protect sensitive electronics from fast-rising transients such as ESD, load dump, and inductive switching spikes. Its glass-passivated junction ensures stable clamping performance and low leakage (<1 µA at VWM).
It operates across –55°C to +150°C junction temperature, meets JESD201 Class 2 whisker resistance, and complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms - critical for automotive power rail protection where unidirectional or bidirectional clamping must respond in <1.0 ps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 97.2 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR min/max | 108–132 V @ 1 mA - Confirmed breakdown range defining reliable turn-on threshold under surge |
| VC@IPPM | 165 V @ 2.5 A (10/1000 μs) - Clamped voltage limiting downstream circuit stress during worst-case transient |
| PPPM | 400 W - Peak pulse power handling capacity per single non-repetitive event |
| IR@VWM | <1 µA - Ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without thermal derating penalties |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline compatible with automated placement and reflow |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bidirectional P4SMA120CAH); weight ≈ 0.060 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking required; identical clamping behavior in both directions per ISO 7637-2 test requirements |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including temperature cycling, humidity bias, and mechanical shock |
| Glass-passivated junction | Stable VBR tolerance and low long-term drift under thermal stress and humidity exposure |
| Fast response time <1.0 ps | Clamps transients before propagation into protected ICs, meeting stringent ESD immunity requirements |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without floor-life constraints |
| ISO 7637-2 compliance | Guaranteed protection against real-world automotive transients including load dump (Pulse 5a/b) and coupled noise (Pulse 1/2a/2b/3a/3b) |
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 ADAS ECUs subjected to load dump and battery reversal events. IC Role / Device Role / Timing Role: Bidirectional TVS device placed directly across input terminals to clamp surges before they reach controller ICs and MOSFETs. Use Value: Limits peak voltage to ≤165 V during 2.5 A transients, preventing gate oxide damage and ensuring uninterrupted operation per ISO 16750-2. | Use Scenario: Safeguarding primary-side rectifier outputs in industrial switch-mode power supplies exposed to lightning-induced surges on AC mains lines. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between rectified output and ground to absorb repetitive line transients without degradation. Use Value: Withstands 400 W peak pulses and maintains <1 µA leakage at 97.2 V, preserving efficiency while enabling compact layout near bridge rectifiers. |
| LED Driver Power Input | Automotive Lighting Module |
Use Scenario: Surge suppression at input of constant-current LED drivers used in commercial signage and street lighting systems. IC Role / Device Role / Timing Role: Primary overvoltage protection element absorbing induced transients from nearby motor loads or relay switching. Use Value: Fast <1.0 ps response ensures LED string remains undamaged during 10/1000 μs surges up to 2.5 A, extending system lifetime. | Use Scenario: Transient protection for CAN-connected headlamp control units experiencing ESD and coupled noise in vehicle harnesses. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across supply pins to prevent latch-up or reset of microcontroller and driver ICs. Use Value: AEC-Q101 qualification and ISO 7637-2 compliance ensure robustness in harsh automotive harness environments without requiring additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | 600 W rating, SMB package (larger footprint), same VWM/VC specs | Higher power margin but requires PCB area increase; not drop-in due to different pad layout | Select when higher single-pulse energy handling is needed and board space allows SMB footprint |
| 1.5KE120CA | Through-hole DO-201 package, 1500 W rating, higher VC (193 V) | Not suitable for SMT production; used in legacy or high-energy industrial designs | Choose only for through-hole prototyping or where manual assembly and higher surge margin outweigh automation needs |
Compared with SMBJ120CA and 1.5KE120CA, the P4SMA120CAH offers optimal balance of 400 W surge capability, DO-214AC compatibility with high-volume SMT lines, AEC-Q101 qualification, and minimal footprint - making it the preferred choice for space-constrained automotive and industrial DC/DC modules.
Availability
P4SMA120CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switch-mode power supplies, and LED driver input protection requiring stable component supply and AEC-Q101-compliant surge suppression.
Supply support for P4SMA120CAH 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 P4SMA120CAH belongs to TSC's P4SMAx(A)H family of surface-mount TVS diodes engineered specifically for automotive and industrial transient suppression - emphasizing reliability, fast response, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the polarity configuration of P4SMA120CAH?
The P4SMA120CAH is a bidirectional TVS diode, meaning it has no anode/cathode distinction and provides symmetrical clamping in both directions. The "CAH" suffix explicitly denotes bipolar construction, eliminating need for orientation during placement - unlike unidirectional "CH" variants which require correct polarity alignment.
Does P4SMA120CAH meet automotive qualification standards?
Yes, the P4SMA120CAH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 make it suitable for under-hood and body-control module applications where reliability under thermal and mechanical stress is mandatory.
What is the maximum clamping voltage of P4SMA120CAH under surge conditions?
The maximum clamping voltage (VC) of P4SMA120CAH is 165 V at 2.5 A peak pulse current using the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during real-world transients, protecting downstream components such as controllers and gate drivers.
Can P4SMA120CAH replace P4SMA120H or P4SMA120AH in existing designs?
No - P4SMA120CAH is bidirectional, whereas P4SMA120H and P4SMA120AH are unidirectional. Substituting without verifying circuit polarity and transient direction risks failure. The "C" in CAH indicates center-tap or bidirectional functionality; always confirm schematic intent and layout before interchange.
What packaging and reel quantity is available for P4SMA120CAH?
P4SMA120CAH is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format, optimized for high-speed pick-and-place equipment. The matte tin-plated leads comply with J-STD-002 solderability standards, and the UL 94V-0 molding compound supports lead-free reflow profiles without delamination risk.
P4SMA120CAH 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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
P4SMA120CAH FAQ
1.How can I place an order for P4SMA120CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120CAH 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 P4SMA120CAH reliable?
The price and inventory of P4SMA120CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120CAH is usually 5 days.
3.What payment methods are accepted for P4SMA120CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120CAH?
P4SMA120CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120CAH 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 P4SMA120CAH?
For technical support, including P4SMA120CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120CAH requirements.
6.How does Aetrix verify that P4SMA120CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA120CAH 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 P4SMA120CAH meets industry standards.
7.What is the process for return or replacement of P4SMA120CAH?
All P4SMA120CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120CAH, 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 P4SMA120CAH part is unused and in its original packaging.
Return procedure for P4SMA120CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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