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Vishay General Semiconductor - Diodes Division P4SMA27CAHM3/I
- Part No.:
- P4SMA27CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,080
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Product details
Overview
P4SMA27CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 23.1 V standoff voltage (VWM), 25.7–28.4 V breakdown voltage (VBR) at 1 mA, 37.5 V maximum clamping voltage 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 automotive and industrial control systems.
For engineers reviewing the P4SMA27CAHM3/I datasheet, P4SMA27CAHM3/I pinout, P4SMA27CAHM3/I application, or P4SMA27CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternatives for circuit protection redesigns requiring halogen-free, RoHS-compliant TVS devices.
Technical Context
The P4SMA27CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers 37.5 V clamping at 10.7 A IPPM with 30 Ω typical incremental surge resistance, enabling fast response (<1 ns) and minimal let-through energy to downstream components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 23.1 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering during overvoltage events |
| VC (Clamping) | 37.5 V at 10.7 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for IC voltage tolerance compliance |
| PPPM | 400 W - Sustained transient energy absorption capability with 10/1000 µs waveform at TA = 25 °C |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no cathode/anode marking; symmetrical two-terminal device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no polarity marking required |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| 400 W peak pulse power | Supports robust immunity against IEC 61000-4-4 level 4 (4 kV) surges on industrial power rails |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and body electronics |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low incremental surge resistance (≈30 Ω) | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or single-ended sensor output to clamp ±200 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in 5 V-tolerant transceivers by limiting let-through voltage to ≤37.5 V at 10.7 A surge. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and 0–10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Placed between input terminal and ground to shunt induced lightning-induced surges (>1 kV) away from precision op-amps and ADC front-ends. Use Value: Maintains signal integrity by clamping transients before they exceed the 30 V absolute maximum rating of industrial-grade instrumentation amplifiers. |
| Consumer Power Adapter Output Protection | Telecom Ethernet Port ESD Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Connected across +VOUT and GND to absorb flyback spikes from transformer leakage inductance during regulation faults. Use Value: Limits output voltage excursion to 37.5 V during 400 W transient, preventing damage to downstream DC-DC converters rated for 36 V max input. |
Use Scenario: Board-level ESD protection on RJ45 magnetics common-mode lines in Gigabit Ethernet switches and routers. IC Role / Device Role / Timing Role: Bidirectional TVS applied across transformer center taps to suppress ±8 kV contact discharge per IEC 61000-4-2 without distorting high-speed signal integrity. Use Value: Achieves <1 ns response time and <0.5 pF junction capacitance (typ.) to avoid signal attenuation or jitter in 1000BASE-T channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Higher VWM (24 V), lower VC (38.9 V at 10.3 A), same SMA package but SMB (DO-214AA) footprint | Requires PCB pad revision due to larger SMB package; better suited for higher-energy 600 W surge requirements | Select when board layout allows SMB footprint and clamping voltage margin must be tightened below 38 V |
| 1.5KE27CA | Through-hole DO-15 package, 400 W rating, VWM = 23.1 V, VC = 41.5 V at 9.6 A | Not suitable for automated SMT assembly; used in legacy industrial power supplies where manual assembly remains viable | Choose only for through-hole prototyping or repair of existing DO-15-based designs; not recommended for new SMT designs |
Compared with P4SMA27CAHM3/I, SMBJ24CA offers tighter clamping but demands PCB redesign, while 1.5KE27CA retains identical electrical specs but sacrifices SMT compatibility and AEC-Q101 qualification - making P4SMA27CAHM3/I optimal for new automotive and high-volume industrial SMT deployments.
Availability
P4SMA27CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom Ethernet port protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA27CAHM3/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, TVS, and MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - delivering standardized 400 W surge capability in compact SMA packages with AEC-Q101 and RoHS options.
FAQ
What is the clamping voltage of the P4SMA27CAHM3/I under a 10/1000 µs surge?
The P4SMA27CAHM3/I has a maximum clamping voltage (VC) of 37.5 V at 10.7 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and represents the highest voltage imposed on the protected circuit during a defined transient event. The P4SMA27CAHM3/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the P4SMA27CAHM3/I suitable for automotive applications?
Yes, the P4SMA27CAHM3/I is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive electronics. It is specified for use in engine control units, body control modules, and sensor interfaces where reliability under harsh thermal and electrical conditions is mandatory. The P4SMA27CAHM3/I meets these requirements without derating at temperatures up to +125 °C ambient.
What does the "CA" suffix mean in P4SMA27CAHM3/I?
The "CA" suffix in P4SMA27CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA27AHM3/I), the CA version has no polarity marking and functions identically regardless of voltage polarity across its terminals. This makes the P4SMA27CAHM3/I ideal for protecting AC-coupled signals, differential buses, or any line where transient direction is unpredictable.
How does the P4SMA27CAHM3/I compare to older P4SMA27A variants?
The P4SMA27CAHM3/I differs from legacy P4SMA27A parts in three key ways: it is bidirectional (CA vs. A), halogen-free (HM3 vs. E3/M3), and AEC-Q101 qualified (HM3 suffix). Electrically, its VWM (23.1 V), VBR (25.7–28.4 V), and VC (37.5 V) match the unidirectional P4SMA27A's reverse characteristics but extend protection to both polarities. The P4SMA27CAHM3/I also meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow standards not guaranteed in earlier commercial-grade versions.
What is the thermal resistance of the P4SMA27CAHM3/I, and how does it affect layout?
The P4SMA27CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; increasing pad area or adding thermal vias reduces RθJA and improves power handling during repetitive surges. For continuous operation near PD = 3.3 W, PCB layout must ensure adequate copper area and airflow - the P4SMA27CAHM3/I's 150 °C max junction temperature allows operation in sealed enclosures up to +105 °C ambient if derated accordingly.
P4SMA27CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA27CAHM3/I FAQ
1.How can I place an order for P4SMA27CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHM3/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 P4SMA27CAHM3/I reliable?
The price and inventory of P4SMA27CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHM3/I?
P4SMA27CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHM3/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 P4SMA27CAHM3/I?
For technical support, including P4SMA27CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHM3/I requirements.
6.How does Aetrix verify that P4SMA27CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHM3/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 P4SMA27CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHM3/I?
All P4SMA27CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHM3/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 P4SMA27CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA27CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27CAHM3/I Tags
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