My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA27AHM3_A/I
- Part No.:
- P4SMA27AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27AHM3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,501
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA27AHM3_A/I 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), 23.1 V stand-off voltage (VWM), and 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current. It delivers 400 W peak pulse power (10/1000 µs waveform) and is AEC-Q101 qualified for automotive applications such as sensor line protection.
For engineers reviewing the P4SMA27AHM3_A/I datasheet, P4SMA27AHM3_A/I pinout, P4SMA27AHM3_A/I application, or P4SMA27AHM3_A/I equivalent, this device serves as a robust, low-profile, halogen-free TVS solution with verified clamping performance, MSL Level 1 moisture sensitivity, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Technical Context
The P4SMA27AHM3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential pulse waveform, with thermal derating above 25 °C per Fig. 2 and junction-to-ambient thermal resistance of 120 °C/W.
Designed for transient suppression on DC power rails and signal lines, it features a cathode-band polarity marking, supports repetitive surge duty cycle ≤0.01%, and meets UL 94 V-0 flammability requirements. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines reliable avalanche initiation threshold under controlled test conditions |
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capability without failure |
| IFSM | 40 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction events |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMA (DO-214AC) - standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0; matte tin-plated leads; cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to system ground or low-side reference in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 24 V rail or sensor output); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier-1 automotive supply chains |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/3a transients without degradation |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without pre-baking |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage exposure to downstream MOSFETs or microcontrollers |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative-going transients and limit positive overshoot. Use Value: Ensures <1 µs response to 100 V/µs transients while maintaining VC ≤ 37.5 V, preserving signal integrity and preventing latch-up in connected MCUs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring surges and electrostatic discharge in factory automation environments. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 400 W pulses from relay coil flyback or motor drive noise. Use Value: Delivers stable VWM = 23.1 V margin above nominal 24 V supply, enabling reliable detection of valid logic-high states while rejecting >30 V transients. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side transient suppression on 5–24 V DC outputs of wall adapters and USB PD power supplies exposed to user-handling ESD and cable coupling. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to common ground, placed immediately after DC-DC converter output filter. Use Value: Withstands ≥10 kV contact ESD (IEC 61000-4-2) and limits clamped voltage to 37.5 V, protecting downstream USB-C controller ICs and load switches. |
Use Scenario: Overvoltage protection on low-speed telecom interface lines (e.g., RS-232, RS-485 stubs) in network edge equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Series-connected TVS on data line pairs, operating in reverse-biased standby with fast avalanche turn-on during line-to-ground spikes. Use Value: Provides 400 W pulse handling with 37.5 V clamping, ensuring signal distortion remains below 5% for 1 Mbps RS-485 waveforms during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Higher 600 W PPPM, larger SMB (DO-214AA) package, same VBR range but higher VC (43.5 V) | Better suited for high-energy industrial surges; requires larger PCB footprint | Select when >400 W pulse handling is required and board space permits SMB outline |
| 1.5SMC27A | Same VBR/VC specs, 1500 W PPPM, larger SMC (DO-214AB) package, non-AEC-Q101 | Targeted at non-automotive, high-reliability industrial systems with extreme surge exposure | Choose for legacy designs needing drop-in replacement where AEC-Q101 is not mandated |
Compared with SMBJ27A and 1.5SMC27A, the P4SMA27AHM3_A/I offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and verified 400 W clamping performance-making it preferred for space-constrained automotive ECUs and consumer electronics where halogen-free and MSL Level 1 are mandatory.
Availability
P4SMA27AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for P4SMA27AHM3_A/I 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 optimization.
The P4SMA series is designed for robust transient suppression in automotive, industrial, and consumer electronics-delivering standardized TVS performance in compact, automated-placement-ready packages with rigorous qualification for harsh environments.
FAQ
What is the breakdown voltage tolerance for P4SMA27AHM3_A/I?
The P4SMA27AHM3_A/I has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tolerance is confirmed in the Electrical Characteristics table of Vishay document 88367 and applies strictly under TA = 25 °C conditions with proper thermal mounting.
Is P4SMA27AHM3_A/I suitable for bidirectional transient protection?
No, P4SMA27AHM3_A/I is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. It conducts only in reverse bias (cathode to anode) during clamping and must be oriented with cathode toward the protected line. For bidirectional protection, use P4SMA27CA variants instead.
Does P4SMA27AHM3_A/I meet automotive qualification standards?
Yes, P4SMA27AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including HTGB, H3TRB, TCT, and ESD, validating its suitability for automotive powertrain, body, and ADAS applications.
What is the maximum clamping voltage of P4SMA27AHM3_A/I at rated peak pulse current?
The maximum clamping voltage (VC) of P4SMA27AHM3_A/I is 37.5 V at 10.7 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream circuit overvoltage design margins.
What does the "HM3" suffix indicate in P4SMA27AHM3_A/I?
The "HM3" suffix in P4SMA27AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It also specifies tape-and-reel packaging in 13-inch reels (suffix "I") and confirms compliance with JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow profile (260 °C peak).
P4SMA27AHM3_A/I 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/I FAQ
1.How can I place an order for P4SMA27AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27AHM3_A/I 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/I reliable?
The price and inventory of P4SMA27AHM3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for P4SMA27AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27AHM3_A/I?
P4SMA27AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27AHM3_A/I 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/I?
For technical support, including P4SMA27AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA27AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA27AHM3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of P4SMA27AHM3_A/I?
All P4SMA27AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27AHM3_A/I, 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/I part is unused and in its original packaging.
Return procedure for P4SMA27AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27AHM3_A/I 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
