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Vishay General Semiconductor - Diodes Division P4SMA27CAHM3/H
- Part No.:
- P4SMA27CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHM3/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,319
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Product details
Overview
P4SMA27CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) designed for clamping inductive switching surges and ESD transients across signal and power lines. It features a 27 V standoff voltage (VWM), 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA27CAHM3/H datasheet, P4SMA27CAHM3/H pinout, P4SMA27CAHM3/H application, or P4SMA27CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal performance under repetitive surge conditions in automotive-grade designs.
Technical Context
The P4SMA27CAHM3/H operates as a voltage-clamped avalanche diode with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its 25.7–28.4 V breakdown voltage (VBR) at 1 mA test current ensures precise overvoltage triggering, while low incremental surge resistance enables stable clamping during fast transients.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it delivers 400 W peak pulse power (derated to 300 W above 91 V) and supports junction temperatures from –65 °C to +150 °C. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable turn-on during transients without premature conduction. |
| VC (Clamping Voltage) | 37.5 V at 10.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for IC-level voltage tolerance compliance. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Sustained surge energy handling capacity; derates linearly above 25 °C per Fig. 2. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | Acts as cathode during positive surge; forms symmetrical clamping path with cathode terminal. |
| Cathode | Transient current exit (either direction) | Acts as anode during negative surge; completes bidirectional conduction loop with anode terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualification (HM3 suffix) | Validated reliability for automotive powertrain, body control, and ADAS sensor modules. |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy load-dump and inductive kick events common in 12 V/24 V vehicle systems. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity limitations or baking requirements. |
| Glass passivated junction | Ensures long-term stability and low parameter drift under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal lines to clamp transients before they reach sensitive input stages. Use Value: Prevents latch-up or permanent damage to microcontrollers and transceivers while maintaining signal fidelity up to 1 MHz bandwidth. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils and motor drives. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V DC input rails to absorb repetitive 400 W surges without degradation. Use Value: Extends system uptime by eliminating false triggers and component failures in harsh factory-floor environments. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side surge suppression on 5–24 V DC outputs of wall adapters and USB PD chargers exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-leakage (1 µA) bidirectional clamp minimizing standby power loss while responding in <1 ps. Use Value: Meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) without compromising efficiency or thermal budget. |
Use Scenario: Overvoltage protection on Ethernet PHY interfaces and RS-485 data lines in network switches and base stations. IC Role / Device Role / Timing Role: Fast-response TVS integrated into front-end filter networks to limit common-mode transients before isolation barriers. Use Value: Maintains signal integrity at 100 Mbps+ data rates by limiting clamping overshoot to ≤37.5 V during 10/1000 µs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 38.9 V VC at 17.3 A IPPM. | Better suited for higher-energy surges but requires larger PCB footprint and different pad layout. | Select when surge energy exceeds 400 W or when board space allows larger package for margin. |
| 1.5KE27CA | Through-hole TO-218 package; 1500 W PPPM; 43.0 V VC at 34.9 A IPPM; no AEC-Q101 qualification. | Used in legacy industrial power supplies where automated SMT is not required and automotive qualification is unnecessary. | Choose only for non-automotive, through-hole designs needing higher surge capacity and cost-sensitive volume production. |
Compared with SMBJ27CA and 1.5KE27CA, the P4SMA27CAHM3/H offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and validated 400 W surge handling-making it the preferred choice for new automotive and space-constrained industrial designs requiring drop-in manufacturability and qualification traceability.
Availability
P4SMA27CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, and telecom line interfaces requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production batches.
Supply support for P4SMA27CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The P4SMA series targets high-volume, space-constrained transient protection applications in automotive, industrial, and consumer electronics-designed specifically for robustness under repetitive surge stress and seamless SMT integration.
FAQ
What is the clamping voltage of the P4SMA27CAHM3/H under a 10/1000 µs surge?
The P4SMA27CAHM3/H has a maximum clamping voltage (VC) of 37.5 V at 10.7 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and reflects worst-case voltage seen by downstream circuitry during surge events, ensuring compatibility with 3.3 V, 5 V, and 24 V logic interfaces.
Is the P4SMA27CAHM3/H qualified for automotive use?
Yes, the P4SMA27CAHM3/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22-A114, making it approved for use in automotive powertrain, body electronics, and ADAS sensor modules.
What does the "CA" suffix mean in P4SMA27CAHM3/H?
The "CA" suffix in P4SMA27CAHM3/H denotes a bidirectional configuration-meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., P4SMA27AHM3/H), it has no cathode band marking and functions identically whether voltage is applied anode-to-cathode or cathode-to-anode.
What is the thermal resistance of the P4SMA27CAHM3/H?
The P4SMA27CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per JEDEC standards. Its junction-to-lead resistance (RθJL) is 30 °C/W, supporting reliable heat dissipation in compact layouts without additional heatsinking.
How does the P4SMA27CAHM3/H differ from the P4SMA27AHM3/H?
The P4SMA27CAHM3/H is bidirectional (CA), while the P4SMA27AHM3/H is unidirectional (A). This means the CA version clamps surges of either polarity across the same two terminals, whereas the A version requires correct polarity orientation and conducts only in reverse bias. Their VWM, VBR, VC, and packaging are otherwise identical within datasheet tolerances.
P4SMA27CAHM3/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:
- -
- 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/H FAQ
1.How can I place an order for P4SMA27CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHM3/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 P4SMA27CAHM3/H reliable?
The price and inventory of P4SMA27CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHM3/H?
P4SMA27CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHM3/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 P4SMA27CAHM3/H?
For technical support, including P4SMA27CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHM3/H requirements.
6.How does Aetrix verify that P4SMA27CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHM3/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 P4SMA27CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHM3/H?
All P4SMA27CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHM3/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 P4SMA27CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA27CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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