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Vishay General Semiconductor - Diodes Division P4SMA27AHM3_A/H
- Part No.:
- P4SMA27AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27AHM3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,980
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Product details
Overview
P4SMA27AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power (10/1000 µs waveform). It delivers automotive-grade protection for 12 V and 24 V DC power rails in sensor interfaces and microcontroller I/O lines.
For engineers reviewing the P4SMA27AHM3_A/H datasheet, P4SMA27AHM3_A/H pinout, P4SMA27AHM3_A/H application, or P4SMA27AHM3_A/H equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive ECU, industrial PLC, and telecom power supply transient suppression designs.
Technical Context
This unidirectional TVS operates by avalanche breakdown to clamp transient overvoltages above its standoff voltage (VWM = 23.1 V) while maintaining <1 µA reverse leakage at rated temperature. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns).
The device sustains repetitive 400 W pulses (duty cycle ≤0.01%) on infinite heatsink conditions and derates linearly above 25 °C ambient per Fig. 2, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - enabling reliable operation up to TJ = 150 °C in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient energy absorption capability without failure under standardized surge waveform |
| IFSM | 40 A - single half-sine surge rating (8.3 ms), supporting inrush and load-dump immunity |
| TJ max. | 150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, TC, HTRB |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events |
| Cathode | Transient current input node | Connected to protected line (e.g., 12 V rail or signal); conducts avalanche current to anode when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| AEC-Q101 qualification (HM3 suffix) | Validated reliability for automotive control modules, meeting lifetime and environmental stress requirements |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling |
| Glass-passivated junction | Ensures stable VBR and low leakage across -65 °C to +150 °C operating range |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot during clamping, reducing risk of logic upset or latch-up in connected ICs |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and power-switch drivers from load dump and inductive switching spikes in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping transients within 1 ns to limit voltage seen by downstream regulators and CAN/LIN PHYs. Use Value: Prevents permanent damage to 3.3 V/5 V LDOs and microcontrollers during 100 V/50 ms load dump events per ISO 16750-2. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation equipment exposed to relay coil flyback. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting induced surges before they reach precision ADC inputs or op-amp buffers. Use Value: Maintains signal integrity by limiting transient-induced offset errors and preventing ADC saturation or reset corruption. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Board |
Use Scenario: Suppressing lightning-induced surges on 48 V DC input of PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with upstream fuse and secondary-stage MOVs for staged protection. Use Value: Absorbs 400 W surges without degradation, extending system uptime and reducing field failure rates in outdoor deployments. |
Use Scenario: Clamping commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals and/or H-bridge high-side FETs to suppress dV/dt-induced gate stress and shoot-through risk. Use Value: Extends MOSFET lifetime by limiting VDS overshoot to <40 V, avoiding avalanche wear-out in cost-sensitive consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same VBR range (25.7–28.4 V), identical SMA package, but not AEC-Q101 qualified; lower production traceability | Targeted at commercial/industrial designs where automotive qualification is not required | Select SMAJ27A only for non-automotive BOMs where cost optimization outweighs long-term reliability validation needs |
| 1.5SMC27A | Higher package thermal mass (DO-214AB), 1500 W peak power rating, larger footprint (7.11 × 6.22 mm vs. 4.5 × 2.79 mm) | Suitable for high-energy surge environments (e.g., AC mains input stages) where PCB space permits | Choose 1.5SMC27A when surge energy exceeds 400 W or board layout allows larger footprint for improved thermal margin |
Compared with SMAJ27A and 1.5SMC27A, P4SMA27AHM3_A/H uniquely combines AEC-Q101 qualification, SMA footprint efficiency, and 400 W clamping in a single-source automotive-qualified part - making it optimal for space-constrained, safety-critical ECUs requiring zero qualification overhead.
Availability
P4SMA27AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA27AHM3_A/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, power efficiency, and automotive-grade validation.
The P4SMA Series targets high-volume transient suppression in automotive, industrial, and telecom applications - engineered for consistent clamping performance, low leakage, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of P4SMA27AHM3_A/H at its rated peak pulse current?
The P4SMA27AHM3_A/H has a maximum clamping voltage (VC) of 37.5 V at its rated peak pulse current (IPPM) of 10.7 A under the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 37.5 V during transient events - critical for protecting 3.3 V or 5 V logic interfaces connected to the same rail as P4SMA27AHM3_A/H.
Is P4SMA27AHM3_A/H suitable for automotive applications?
Yes, P4SMA27AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It meets stress requirements for high-temperature operation (TJ = 150 °C), thermal cycling, and humidity exposure - making P4SMA27AHM3_A/H appropriate for engine control units, body modules, and ADAS sensor power rails.
What is the standoff voltage (VWM) of P4SMA27AHM3_A/H, and why does it matter?
The standoff voltage (VWM) of P4SMA27AHM3_A/H is 23.1 V - the maximum continuous reverse voltage it can block without exceeding 1 µA leakage current. This parameter ensures P4SMA27AHM3_A/H remains non-conductive during normal 12 V or 24 V system operation while still triggering reliably during transients exceeding ~25.7 V, preventing false triggering and power loss.
Does P4SMA27AHM3_A/H have a defined polarity, and how is it marked?
Yes, P4SMA27AHM3_A/H is a unidirectional TVS diode with clearly defined polarity: the cathode is marked by a visible band on the SMA (DO-214AC) package body. The cathode must be connected to the protected line (e.g., 12 V rail), and the anode to ground. Incorrect orientation renders P4SMA27AHM3_A/H ineffective against positive transients and may cause catastrophic failure.
What is the peak pulse power rating of P4SMA27AHM3_A/H, and under what conditions is it specified?
P4SMA27AHM3_A/H is rated for 400 W peak pulse power under the industry-standard 10/1000 µs double-exponential waveform, tested at TA = 25 °C on 0.2" × 0.2" copper pads. Above 25 °C, power derating follows Fig. 2 in the datasheet - e.g., at 85 °C ambient, usable PPPM drops to ~280 W. This rating defines the maximum transient energy P4SMA27AHM3_A/H can absorb without degradation.
P4SMA27AHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for P4SMA27AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27AHM3_A/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_A/H reliable?
The price and inventory of P4SMA27AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA27AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27AHM3_A/H?
P4SMA27AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27AHM3_A/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_A/H?
For technical support, including P4SMA27AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA27AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA27AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA27AHM3_A/H?
All P4SMA27AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for P4SMA27AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27AHM3_A/H Tags
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