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Vishay General Semiconductor - Diodes Division P4SMA27AHM3/H
- Part No.:
- P4SMA27AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27AHM3/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
P4SMA27AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at IT = 1.0 mA), 23.1 V standoff voltage (VWM), 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA27AHM3/H datasheet, P4SMA27AHM3/H pinout, P4SMA27AHM3/H application, or P4SMA27AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), polarity marking (cathode band), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA27AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise transient suppression without latch-up or degradation under repetitive 10/1000 µs pulses at 0.01% duty cycle.
Designed for surface-mount assembly on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, it meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile and supports operation from –65 °C to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at IT = 1.0 mA - defines precise avalanche onset range for repeatable clamping behavior |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 37.5 V at 10.7 A - clamping voltage during 10/1000 µs transient, limiting downstream device stress |
| PPPM | 400 W - peak pulse power handling capability under standard lightning-surge waveform |
| IFSM | 40 A - surge current rating for 8.3 ms half-sine wave, supporting inrush and fault-current events |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| TJ max. | +150 °C - maximum junction temperature, enabling use in under-hood or high-power industrial environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by molded band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward-biased surges or ESD events |
| Cathode | Avalanche clamping terminal | Marked with band; connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without failure |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance for long-term reliability |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1, 260 °C peak reflow | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp negative-going transients and suppress positive spikes via cathode-to-rail configuration. Use Value: Limits VC to 37.5 V during 10.7 A surge, preventing damage to 24 V-rated interface ICs while maintaining signal integrity below 23.1 V normal operation. |
Use Scenario: Safeguarding DC-DC converter inputs in programmable logic controllers (PLCs) and motor drives against 400 V/12 Ω surge events. IC Role / Device Role / Timing Role: Mounted across input rails (cathode to +VIN, anode to GND) to shunt energy during line transients before reaching primary switching stage. Use Value: Withstands 400 W peak pulse and 40 A surge current, ensuring no failure during repeated 10/1000 µs surges common in factory-floor power distribution. |
| Consumer Device USB Port | Telecom Line Interface |
|
Use Scenario: ESD and surge protection for USB 2.0 data lines (D+/D−) and VBUS in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Paired unidirectional devices (anode to line, cathode to VBUS or GND) to handle both differential and common-mode transients. Use Value: Fast response time and 37.5 V clamping prevent latch-up in USB PHY ICs rated for 3.6 V absolute maximum, while low capacitance avoids signal distortion. |
Use Scenario: Secondary-side protection on Ethernet PHY power rails and RS-485 termination networks in base station backhaul equipment. IC Role / Device Role / Timing Role: Placed between isolated DC supply and communication IC to absorb induced lightning surges coupled through transformers or cables. Use Value: 150 °C max junction temperature and 120 °C/W RθJA allow reliable operation in sealed telecom enclosures with limited airflow and elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same VBR (25.7–28.4 V), identical SMA package, but rated for 400 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use where AEC-Q101 is not mandated | Select SMAJ27A if cost-sensitive and automotive compliance is unnecessary; verify layout compatibility with same footprint |
| 1.5SMC27A | Higher power rating (1500 W), larger SMC (DO-214AB) package, VBR 25.7–28.4 V, non-AEC-Q101 | Used where higher surge energy absorption is required, e.g., AC mains input stages or outdoor telecom cabinets | Choose 1.5SMC27A only when PCB space allows larger SMC footprint and system-level surge tests exceed 400 W requirements |
Compared with SMAJ27A and 1.5SMC27A, the P4SMA27AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and compact SMA packaging - making it the preferred choice for space-constrained automotive modules and industrial designs requiring certified reliability without footprint change.
Availability
P4SMA27AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC power inputs, consumer USB port protection, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA27AHM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance for P4SMA27AHM3/H?
The P4SMA27AHM3/H has a breakdown voltage VBR range of 25.7 V to 28.4 V at test current IT = 1.0 mA, representing a ±5% tolerance around the nominal 27 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 24 V automotive electronics without false triggering.
Is P4SMA27AHM3/H suitable for automotive applications?
Yes, the P4SMA27AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is validated for use in engine control units, ADAS camera modules, and body electronics where sustained operation from –65 °C to +150 °C and resistance to mechanical shock/vibration are required.
What does the "HM3" suffix mean in P4SMA27AHM3/H?
The "HM3" suffix in P4SMA27AHM3/H denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and full AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms suitability for automotive production, with traceable material content and process controls per automotive quality standards.
How is polarity marked on the P4SMA27AHM3/H package?
The P4SMA27AHM3/H uses a molded cathode band on the SMA (DO-214AC) body to identify the cathode terminal; the opposite end is the anode. This marking is essential for correct orientation during PCB layout - cathode must connect to the higher-potential rail (e.g., +24 V) to enable proper unidirectional clamping during overvoltage events.
What is the maximum clamping voltage of P4SMA27AHM3/H under surge conditions?
The P4SMA27AHM3/H exhibits a maximum clamping voltage VC of 37.5 V at 10.7 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream components rated for ≤40 V withstand stress without damage or functional interruption.
P4SMA27AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA27AHM3/H FAQ
1.How can I place an order for P4SMA27AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27AHM3/H 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 P4SMA27AHM3/H reliable?
The price and inventory of P4SMA27AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA27AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27AHM3/H?
P4SMA27AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27AHM3/H 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 P4SMA27AHM3/H?
For technical support, including P4SMA27AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27AHM3/H requirements.
6.How does Aetrix verify that P4SMA27AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA27AHM3/H 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 P4SMA27AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA27AHM3/H?
All P4SMA27AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27AHM3/H, 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 P4SMA27AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA27AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27AHM3/H Tags
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