My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA120CH
- Part No.:
- P4SMA120CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120CH.pdf
- Description:
- 400W, 120V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,453
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA120CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade overvoltage protection in DC power rails and signal lines. It delivers 400W peak pulse power handling, 173V maximum clamping voltage at 2.4A 10/1000μs surge, and operates across –55°C to +150°C junction temperature range - deployed in on-board DC/DC converters and lighting control modules.
For engineers reviewing the P4SMA120CH datasheet, P4SMA120CH pinout, P4SMA120CH application, or P4SMA120CH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package compatibility, bidirectional clamping symmetry, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive transients.
Technical Context
The P4SMA120CH implements a glass-passivated silicon junction optimized for fast transient response (<1.0ps), with symmetrical breakdown characteristics in both directions due to its CH suffix denoting bidirectional construction. Its clamping behavior follows the 10/1000μs double-exponential waveform standard per R.E.A., delivering consistent voltage limiting under repetitive or single-event surges.
It features low leakage (<1μA at 97.2V working stand-off), a temperature coefficient of VBR at 0.107%/°C, and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling reliable reflow assembly and long-term stability in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 97.2 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe DC rail margin for 120V nominal systems. |
| VBR min/max | 108 V / 132 V @ 1.0 mA - Verified breakdown threshold range ensures predictable turn-on during transients without premature conduction. |
| VC@IPPM | 173 V @ 2.4 A (10/1000μs) - Clamping voltage defines worst-case overvoltage seen by protected ICs during surge events. |
| PPPM | 400 W - Peak pulse power rating determines survivability against standardized load dump and inductive switching spikes. |
| IR@VWM | <1 μA - Ultra-low reverse leakage minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| TJ max | +150 °C - Enables operation in engine bay or under-hood locations where ambient temperatures exceed 125°C. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, UL 94V-0 molding compound, 0.060g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | Accepts surge current during positive polarity transients; forms one side of symmetrical clamping path. |
| Cathode | Transient current entry (reverse bias) | Accepts surge current during negative polarity transients; completes bidirectional clamping loop with anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD - supports PPAP documentation. |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation. |
| Fast response time | <1.0 ps - Limits voltage overshoot before downstream protection elements activate, preserving sensitive analog or digital inputs. |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives, critical for under-hood applications. |
Applications
| On-board DC/DC Converter Protection | Automotive Lighting Control |
|---|---|
Use Scenario: Protects buck/boost controller ICs and MOSFET gate drivers from load dump and alternator ripple in 24V/48V vehicle architectures. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input bus to clamp transients before they reach power stage components. Use Value: Maintains system uptime by preventing latch-up or gate oxide damage in controllers exposed to ISO 7637-2 Pulse 1 (–150V/100ms). | Use Scenario: Shields LED driver ICs and CAN/LIN transceivers in headlamp and tail lamp modules from ESD and switching noise. IC Role / Device Role / Timing Role: Placed at module input and signal line terminations to absorb fast-rising transients from relay bounce or PWM dimming circuits. Use Value: Ensures EMC compliance and prevents flicker or reset events caused by sub-100ns ESD bursts exceeding ±8kV contact discharge. |
| Industrial SMPS Input Stage | 12V/24V Adapter Surge Suppression |
Use Scenario: Integrated into AC-DC front-end and DC-DC intermediate bus stages of DIN-rail power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device parallel to bulk capacitor, absorbing energy from 10/1000μs line-to-ground surges up to 400W. Use Value: Eliminates need for secondary MOV-based protection, reducing BOM count while meeting IEC 61000-4-5 Level 3 (2kV line-earth). | Use Scenario: Used in wall adapters and USB-C PD chargers to meet UL 62368-1 surge immunity requirements for consumer and medical auxiliary equipment. IC Role / Device Role / Timing Role: Mounted at AC input rectifier output and DC output terminals to suppress differential-mode transients from mains switching. Use Value: Achieves <1μA leakage at 97.2V, minimizing no-load power consumption while maintaining robust 173V clamping performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | 600W rating, SMB package (larger footprint), higher IPPM (3.3A), same VC (173V) | Better suited for higher-energy surges but requires PCB layout change; not drop-in compatible with DO-214AC footprint. | Select when system-level surge testing exceeds 400W or when thermal derating margin is critical above 85°C ambient. |
| 1.5KE120CA | 1500W rating, DO-201AD axial package, higher VC (193V), slower response (~1ps vs. <1ps) | Requires through-hole assembly; clamps at higher voltage, risking downstream component stress in precision 120V systems. | Choose only for legacy through-hole designs or where cost-per-watt is prioritized over board space and clamping precision. |
Compared with SMBJ120CA and 1.5KE120CA, the P4SMA120CH provides optimal balance of AEC-Q101 qualification, DO-214AC SMT compatibility, and tight 173V clamping - making it preferred for new automotive and compact industrial designs requiring validated reliability and minimal PCB real estate.
Availability
P4SMA120CH is available at Aetrix Electronics and suitable for automotive lighting control, on-board DC/DC converter protection, and industrial SMPS input-stage surge suppression requiring stable component supply and full traceability.
Supply support for P4SMA120CH 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 capability.
The P4SMA120CH belongs to TSC's P4SMA(A)H series - engineered specifically for automotive and industrial transient suppression where bidirectional clamping, high-temperature operation, and ISO 7637-2 compliance are mandatory design requirements.
FAQ
What is the polarity configuration of the P4SMA120CH?
The P4SMA120CH is a bidirectional TVS diode, indicated by the "CH" suffix. It has no designated anode or cathode for functional operation - both terminals behave identically under positive or negative transient conditions. This eliminates orientation concerns during automated placement and simplifies PCB layout for symmetric surge paths.
Does the P4SMA120CH meet automotive qualification standards?
Yes, the P4SMA120CH is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its construction - including glass passivation, JESD201 Class 2 whisker resistance, and MSL Level 1 rating - satisfies automotive manufacturing and reliability requirements for under-hood and body-control module applications.
What is the maximum clamping voltage of the P4SMA120CH under surge conditions?
The P4SMA120CH exhibits a maximum clamping voltage (VC) of 173 V at 2.4 A peak pulse current using the standard 10/1000μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Can the P4SMA120CH be used in place of unidirectional TVS diodes?
No - the P4SMA120CH is strictly bidirectional and must not replace unidirectional types (e.g., P4SMA120H) in circuits requiring DC blocking or polarity-sensitive clamping. Its symmetrical V-I curve allows conduction in both directions, making it unsuitable for applications where forward conduction must be prevented during normal operation.
What packaging and reel quantity is offered for the P4SMA120CH?
The P4SMA120CH is supplied in DO-214AC (SMA) package format on 7,500-piece tape-and-reel carriers, conforming to EIA-481 standards. The matte tin-plated leads ensure compatibility with standard SnPb and lead-free reflow profiles, and the marking code "RDJ" is laser-etched on the device body for traceability.
P4SMA120CH 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):
- 97.2V
- Voltage - Breakdown (Min):
- 108V
- Voltage - Clamping (Max) @ Ipp:
- 173V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- 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)
P4SMA120CH FAQ
1.How can I place an order for P4SMA120CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120CH 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 P4SMA120CH reliable?
The price and inventory of P4SMA120CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120CH is usually 5 days.
3.What payment methods are accepted for P4SMA120CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120CH?
P4SMA120CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120CH 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 P4SMA120CH?
For technical support, including P4SMA120CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120CH requirements.
6.How does Aetrix verify that P4SMA120CH is sourced from the original manufacturer or authorized distributors?
All P4SMA120CH 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 P4SMA120CH meets industry standards.
7.What is the process for return or replacement of P4SMA120CH?
All P4SMA120CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120CH, 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 P4SMA120CH part is unused and in its original packaging.
Return procedure for P4SMA120CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA120CH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
