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Taiwan Semiconductor Corporation P4SMA120H
- Part No.:
- P4SMA120H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120H.pdf
- Description:
- 400W, 120V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,975
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Product details
Overview
P4SMA120H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with breakdown voltage 108–132 V, clamping voltage 173 V at 2.4 A (10/1000 µs), and working stand-off voltage 97.2 V. It protects DC power rails in automotive-grade SMPS and on-board DC/DC converters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA120H datasheet, P4SMA120H pinout, P4SMA120H application, or P4SMA120H equivalent, key selection criteria include its AEC-Q101 qualification, 150°C junction rating, sub-1 ps response time, <1 µA leakage at VWM, and compliance with UL 94V-0 and J-STD-020 Level 1 moisture sensitivity.
Technical Context
The P4SMA120H is a single-die, unidirectional TVS diode designed for fast clamping of high-energy transients on DC lines. Its glass-passivated junction ensures stable breakdown behavior, while its DO-214AC package supports automated placement and meets JESD 201 Class 2 whisker resistance.
It operates across -55°C to +150°C junction temperature range and delivers 400 W peak pulse power (10/1000 µs waveform). The device exhibits low temperature coefficient (0.107 %/°C) and maintains clamping performance under repetitive surge stress per Fig.2 derating curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 108 V / 132 V - Ensures reliable triggering above system nominal voltage (e.g., 96 V DC bus) without false conduction |
| VWM | 97.2 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC@IPPM | 173 V - Clamped voltage during 2.4 A 10/1000 µs surge; defines worst-case overvoltage seen by protected IC |
| PPPM | 400 W - Peak pulse power handling capability per single 10/1000 µs transient event |
| IR@VWM | <1 µA - Minimal standby power loss and negligible loading on high-impedance sensing circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments and thermally constrained PCB layouts |
| Response time | <1.0 ps - Sub-nanosecond turn-on ensures protection before sensitive downstream components experience overstress |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; weight ≈0.060 g; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms current path during reverse-biased transient clamping |
| Cathode | High-side transient input | Connected to protected line (e.g., 96 V supply); polarity mark identifies this terminal on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal/humidity bias conditions |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| J-STD-020 Level 1 | No pre-conditioning required before reflow; suitable for standard SMT assembly without baking |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive On-Board Charger (OBC) Input Stage | Industrial DC/DC Converter Primary Side |
|---|---|
Use Scenario: Protects 100 V DC input stage of bidirectional OBC against load dump transients during vehicle battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS placed between HV DC+ and chassis ground to clamp surges up to ±120 V. Use Value: Limits clamped voltage to 173 V, keeping downstream SiC MOSFET gate drivers within safe operating area during ISO 7637-2 Pulse 1 events. | Use Scenario: Shields isolated flyback controller ICs on primary side of 48 V-to-12 V industrial DC/DC module from switching-induced overshoot. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 400 W pulses at 97.2 V to prevent latch-up in PWM controllers. Use Value: Sub-1 ps response ensures clamping occurs before 100 ns propagation delay of typical optocoupler feedback paths. |
| Telecom Power Shelf Protection | EV Battery Management System (BMS) Cell Monitor Bus |
Use Scenario: Safeguards 96 V telecom rectifier output against lightning-induced surges entering via distribution cabling. IC Role / Device Role / Timing Role: Front-end TVS on main DC bus, coordinated with upstream fusing and downstream LC filtering. Use Value: 173 V clamping voltage provides ≥23% margin above 140 V maximum steady-state bus voltage, meeting GR-1089-CORE immunity thresholds. | Use Scenario: Guards isolated CAN/UART communication lines between BMS master and cell monitoring ICs against ground bounce in high-current traction systems. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on 96 V auxiliary supply rail feeding isolated data isolators. Use Value: Ultra-low IR avoids loading precision voltage references used in analog front-end ADCs for cell voltage measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Same VWM (97 V), but SMB package (DO-214AA); 600 W PPPM; bidirectional variant available | Higher power rating suits higher-energy surge environments; larger footprint may limit layout density | Select when board space allows larger package and >400 W margin is required |
| 1.5SMC120A | Same VWM/VC specs, but DO-214AB (SMC) package; 1500 W PPPM; higher IFSM (100 A) | Designed for mains-connected equipment; less suited for fine-pitch automotive SMT lines | Prefer for industrial AC/DC front ends where surge energy exceeds 400 W capability |
Compared with SMBJ120A and 1.5SMC120A, the P4SMA120H offers optimal balance of AEC-Q101 compliance, DO-214AC compactness, and precise 97.2 V standoff for 96–100 V DC systems-making it preferred for space-constrained automotive and transportation electronics.
Availability
P4SMA120H is available at Aetrix Electronics and suitable for automotive power conversion, industrial DC/DC modules, and telecom rectifier systems requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA120H 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 and industrial qualification capabilities.
The P4SMA series targets high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 validation, tight VBR tolerance, and robust surge endurance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the P4SMA120H under standard 10/1000 µs surge conditions?
The P4SMA120H has a maximum clamping voltage (VC) of 173 V when subjected to its rated peak pulse current of 2.4 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA120H maintains this clamping performance across its full operating temperature range (-55°C to +150°C).
Is the P4SMA120H suitable for bidirectional transient protection?
No, the P4SMA120H is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications, Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., P4SMA120CH). Using the P4SMA120H in reverse-biased AC configurations risks permanent damage due to forward conduction during negative half-cycles.
Does the P4SMA120H meet automotive qualification standards?
Yes, the P4SMA120H is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, HTRB, temperature cycling, and mechanical shock. It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements for automotive electrical system immunity, making it suitable for engine control units, ADAS power supplies, and EV charging interfaces.
What is the moisture sensitivity level (MSL) rating for the P4SMA120H?
The P4SMA120H carries J-STD-020 Moisture Sensitivity Level 1, meaning it may be stored indefinitely at ambient conditions (<30°C / 60% RH) without baking prior to reflow soldering. This eliminates pre-reflow bake cycles in standard SMT assembly, reducing process complexity and cost for high-volume automotive and industrial manufacturing.
How does the P4SMA120H compare to the P4SMA120AH variant?
The P4SMA120AH features tighter breakdown voltage tolerance (114–126 V vs. 108–132 V for P4SMA120H) and slightly lower clamping voltage (165 V vs. 173 V), achieved via enhanced process control. Both share identical package, power rating, and AEC-Q101 qualification. The P4SMA120H remains preferred where cost-sensitive designs accept wider VBR spread without compromising system-level surge margin.
P4SMA120H 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA120H FAQ
1.How can I place an order for P4SMA120H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120H 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 P4SMA120H reliable?
The price and inventory of P4SMA120H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120H is usually 5 days.
3.What payment methods are accepted for P4SMA120H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120H?
P4SMA120H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120H 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 P4SMA120H?
For technical support, including P4SMA120H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120H requirements.
6.How does Aetrix verify that P4SMA120H is sourced from the original manufacturer or authorized distributors?
All P4SMA120H 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 P4SMA120H meets industry standards.
7.What is the process for return or replacement of P4SMA120H?
All P4SMA120H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120H, 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 P4SMA120H part is unused and in its original packaging.
Return procedure for P4SMA120H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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