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Taiwan Semiconductor Corporation P4SMA9.1H
- Part No.:
- P4SMA9.1H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1H.pdf
- Description:
- 400W, 9.1V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,174
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Product details
Overview
P4SMA9.1H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal paths. It features a 9.1V breakdown voltage (8.19–10.00 V), 7.37 V working stand-off voltage, 13.8 V clamping voltage at 30 A peak pulse current, 400 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the P4SMA9.1H datasheet, P4SMA9.1H pinout, P4SMA9.1H application, or P4SMA9.1H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, low leakage (<50 µA at 7.37 V), DO-214AC (SMA) package compatibility with automated SMT assembly, and junction temperature range of –55°C to +150°C.
Technical Context
The P4SMA9.1H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range (8.19–10.00 V at 1.0 mA test current). Its glass-passivated junction ensures stable VBR and low leakage (<50 µA at VWM = 7.37 V), while fast response time (<1.0 ps) enables effective suppression of ESD and fast-rising transients.
It complies with ISO 7637-2 for automotive load-dump and switching transient immunity and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for high-reliability reflow soldering without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 8.19–10.00 V: Ensures reliable turn-on before downstream IC damage in 9 V nominal systems |
| VWM | 7.37 V: Maximum continuous reverse voltage without significant leakage - compatible with 5–9 V logic and power rails |
| VC @ IPPM = 30.0 A | 13.8 V: Clamped voltage during 10/1000 µs surge - limits stress on protected 12 V circuits |
| PPPM | 400 W: Peak pulse power handling per single transient - meets ISO 7637-2 Pulse 1 & 2b requirements |
| IR @ VWM | <50 µA: Low standby leakage preserves battery life in always-on automotive modules |
| Junction Temp Range | –55°C to +150°C: Supports operation in engine bay and under-hood environments |
| Package | DO-214AC (SMA): Standardized SMT footprint with cathode band marking - compatible with JEDEC MS-013 |
Pinout & Package
DO-214AC (SMA) package: Surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode (banded end) | Reverse-biased protection terminal | Connected to protected line (e.g., 9 V supply rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment power rails |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| Clamping voltage ≤13.8 V @ 30 A | Protects 12 V-rated components (e.g., MCUs, CAN transceivers) from ISO 7637-2 transients |
| Moisture Sensitivity Level 1 | Zero floor-life limitation - supports direct placement without baking or dry-pack handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 9–12 V supply inputs in automotive body control modules (BCM) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and ground, clamping surges within 1 ps to limit voltage excursion. Use Value: Enables compliance with ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery disconnect) without derating system voltage margins. | Use Scenario: Safeguarding input stage of isolated 12 V to 3.3 V DC/DC converters in factory automation controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on primary-side input, absorbing repetitive 400 W transients without degradation. Use Value: Prevents MOSFET gate oxide failure and controller latch-up during field-induced surges in industrial environments. |
| LED Driver Supply Line | USB-C Power Delivery Interface |
Use Scenario: Guarding constant-current LED driver ICs in automotive headlamp modules powered from 12 V battery. IC Role / Device Role / Timing Role: Standoff-rated TVS on driver VIN, conducting only during >7.37 V transients while remaining inert during normal operation. Use Value: Maintains <50 µA leakage to avoid quiescent current impact on battery runtime while clamping to 13.8 V. | Use Scenario: Secondary-side transient suppression on USB-C VBUS lines in automotive infotainment docking stations. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, protecting USB PD controller and port multiplexer. Use Value: Meets USB-IF ESD immunity requirements (IEC 61000-4-2 Level 4) with sub-1 ps response and no signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | 600 W peak power, DO-214AA (SMB) package, 9.0 V nominal VBR (8.55–9.45 V) | Higher power rating but larger footprint; requires PCB layout revision | Select when higher surge margin is required and board space allows SMB package |
| 1.5SMC9.0A | 1500 W peak power, DO-214AB (SMC) package, 9.0 V nominal VBR (8.55–9.45 V) | Designed for higher-energy transients; not AEC-Q101 qualified | Prefer for industrial non-automotive use where cost-per-joule is prioritized over qualification |
Compared with SMBJ9.0A and 1.5SMC9.0A, the P4SMA9.1H offers optimal balance of AEC-Q101 compliance, compact DO-214AC footprint, and precise 9.1 V breakdown for 12 V systems - making it the preferred choice for space-constrained automotive modules requiring certified reliability.
Availability
P4SMA9.1H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, LED driver supply lines, and USB-C power delivery interfaces requiring stable component supply across production lifecycles.
Supply support for P4SMA9.1H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and automotive-qualified components.
The P4SMA9.1H belongs to TSC's AEC-Q101-qualified P4SMAxH series - engineered specifically for robust transient suppression in automotive and industrial power systems where reliability under thermal and electrical stress is critical.
FAQ
What is the breakdown voltage range of the P4SMA9.1H?
The P4SMA9.1H has a guaranteed breakdown voltage range of 8.19 V to 10.00 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots and temperature extremes, supporting reliable overvoltage protection in 9 V nominal circuits. The P4SMA9.1H maintains this specification under full AEC-Q101 stress testing.
Is the P4SMA9.1H suitable for automotive applications?
Yes, the P4SMA9.1H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity standards. Its –55°C to +150°C operating junction temperature range, glass-passivated junction, and moisture sensitivity level 1 rating make it suitable for under-hood and body electronics. The P4SMA9.1H is widely deployed in BCMs, lighting modules, and infotainment power supplies.
What is the clamping voltage of the P4SMA9.1H at its rated peak pulse current?
The P4SMA9.1H clamps to a maximum of 13.8 V at its rated peak pulse current of 30.0 A (10/1000 µs waveform). This value is verified per JEDEC test conditions and guarantees that protected downstream components - such as 12 V-rated MCUs or CAN transceivers - remain within safe operating voltage limits during surge events. The P4SMA9.1H achieves this with sub-1 ps response time.
Does the P4SMA9.1H have polarity markings, and how is it oriented on the PCB?
Yes, the P4SMA9.1H uses a DO-214AC (SMA) package with a visible cathode band printed on the molded body. During PCB layout, the banded end must be connected to the line being protected (e.g., 12 V rail), while the anode connects to ground. This orientation ensures proper unidirectional clamping action. The P4SMA9.1H's polarity marking aligns with JEDEC MS-013 mechanical standards.
What packaging and reel quantity is offered for the P4SMA9.1H?
The P4SMA9.1H is supplied in tape-and-reel format with 7,500 units per reel, optimized for high-speed SMT placement. The DO-214AC (SMA) package conforms to JEDEC standard dimensions and is compatible with standard pick-and-place feeders. Aetrix Electronics provides full traceability and lot-level documentation for every P4SMA9.1H reel shipment.
P4SMA9.1H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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)
P4SMA9.1H FAQ
1.How can I place an order for P4SMA9.1H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1H 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 P4SMA9.1H reliable?
The price and inventory of P4SMA9.1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1H?
P4SMA9.1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1H 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 P4SMA9.1H?
For technical support, including P4SMA9.1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1H requirements.
6.How does Aetrix verify that P4SMA9.1H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1H 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 P4SMA9.1H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1H?
All P4SMA9.1H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1H, 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 P4SMA9.1H part is unused and in its original packaging.
Return procedure for P4SMA9.1H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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