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Vishay General Semiconductor - Diodes Division P4SMA16CAHM3/H
- Part No.:
- P4SMA16CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA16CAHM3/H.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA16CAHM3/H 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 and power lines. It features a 16 V standoff voltage (VWM), 17.8 V minimum breakdown voltage (VBR), 22.5 V maximum clamping voltage (VC) at 17.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial control systems.
For engineers reviewing the P4SMA16CAHM3/H datasheet, P4SMA16CAHM3/H pinout, P4SMA16CAHM3/H application, or P4SMA16CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast transient suppression with minimal voltage overshoot.
The device is rated for repetitive 10/1000 µs surges at 0.01% duty cycle (400 W up to 91 V; derated to 300 W above), and meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C - confirming suitability for high-reliability, lead-free assembly processes in automotive-grade designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13.6 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 15.2–16.8 V at 1.0 mA test current - precise voltage threshold where avalanche conduction begins reliably. |
| VC (Clamping Voltage) | 22.5 V at 17.8 A IPPM - peak voltage seen by protected circuit during worst-case transient; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - energy-handling capacity for short-duration surges; enables robust protection against ESD and inductive switching spikes. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - negligible standby current that avoids signal distortion or battery drain in always-on circuits. |
| TJ max. | 150 °C - maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; informs PCB copper pad sizing (0.2" × 0.2") for thermal management. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Bidirectional type - no polarity marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during clamping event. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or reference rail during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces requiring zero-failure reliability. |
| 400 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) and ISO 7637-2 pulse 1/2a/3a transients in vehicle power networks. |
| Low-profile SMA package | 0.208" × 0.157" footprint with 0.090" height - compatible with high-density PCB layouts and automated pick-and-place equipment. |
| MSL Level 1 rating | Allows unlimited floor life and exposure to lead-free reflow profiles up to 260 °C without baking - simplifies manufacturing logistics. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤22.5 V, preventing damage to 3.3 V or 5 V ADC front-ends while maintaining <1 µA leakage for signal integrity. |
Use Scenario: Shielding digital input channels of programmable logic controllers from induced surges on 24 V DC field wiring. IC Role / Device Role / Timing Role: Standoff-clamp protector installed across input terminals upstream of optocoupler isolation stage. Use Value: Absorbs 400 W pulses without degradation, ensuring long-term immunity to repeated 24 V line faults and relay coil flyback events. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in building automation gateways connected to long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common-mode ground. Use Value: Symmetric 13.6 V standoff allows full ±12 V data swing while clamping lightning-induced common-mode surges to safe levels. |
Use Scenario: Adding secondary surge protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary ESD array to handle higher-energy transients. Use Value: 22.5 V clamping prevents latch-up in USB PHY ICs during contact discharge events exceeding IEC 61000-4-2 Level 4 (15 kV air). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | Same VWM (13.6 V) and VC (22.5 V), but SMB package (DO-214AA); 600 W PPPM rating; RθJA = 85 °C/W. | Higher power handling and better thermal performance, but 25% larger footprint; requires PCB layout revision. | Select when higher surge margin or improved thermal dissipation is required, and board space permits larger package. |
| 1.5SMC16CA | Same electrical specs, but SMC (DO-214AB) package; 1500 W PPPM; RθJA = 50 °C/W; 2× footprint area of SMA. | Designed for mains-input or high-energy industrial surge zones; overqualified for signal-line use. | Choose only if system-level surge testing exceeds IEC 61000-4-5 Level 4, and mechanical clearance allows larger body. |
Compared with SMBJ16CA and 1.5SMC16CA, P4SMA16CAHM3/H offers optimal balance of compact size, AEC-Q101 compliance, and 400 W surge capability - making it the preferred choice for space-constrained automotive and industrial signal-line protection where MSL Level 1 and halogen-free requirements apply.
Availability
P4SMA16CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB port protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for P4SMA16CAHM3/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, efficiency, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive yet high-reliability transient suppression needs in automotive, industrial, and communications equipment - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the clamping voltage of P4SMA16CAHM3/H at its rated peak pulse current?
The P4SMA16CAHM3/H has a maximum clamping voltage (VC) of 22.5 V at 17.8 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value ensures protected downstream components - such as 3.3 V or 5 V microcontrollers - remain within absolute maximum ratings during transient events. The clamping performance is verified per Fig. 1 and Table on page 2 of Vishay document 88367.
Is P4SMA16CAHM3/H suitable for automotive applications?
Yes, P4SMA16CAHM3/H is AEC-Q101 qualified (as indicated by the "HM3" suffix), halogen-free, and RoHS-compliant - meeting stringent reliability and environmental requirements for automotive use. It is specified for operating junction temperatures from –65 °C to +150 °C and qualified for under-hood and cabin-mounted ECUs, sensor modules, and infotainment interfaces.
What does the "CA" suffix mean in P4SMA16CAHM3/H?
The "CA" suffix in P4SMA16CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., P4SMA16AHM3/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 P4SMA16CAHM3/H, and how does it affect PCB layout?
P4SMA16CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperature under repetitive surge conditions, designers must allocate adequate copper area and avoid excessive trace length or thermal bottlenecks near the SMA package body.
How does P4SMA16CAHM3/H differ from P4SMA16AHM3/H?
P4SMA16CAHM3/H is bidirectional (CA), while P4SMA16AHM3/H is unidirectional (A). The bidirectional version clamps transients regardless of polarity and lacks a cathode marking; the unidirectional version conducts only in reverse bias and uses a band to indicate cathode. Both share identical VWM (13.6 V), VBR (15.2–16.8 V), and VC (22.5 V), but differ in circuit integration requirements and application scope.
P4SMA16CAHM3/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):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 17.8A
- 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)
P4SMA16CAHM3/H FAQ
1.How can I place an order for P4SMA16CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA16CAHM3/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 P4SMA16CAHM3/H reliable?
The price and inventory of P4SMA16CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA16CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA16CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA16CAHM3/H?
P4SMA16CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA16CAHM3/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 P4SMA16CAHM3/H?
For technical support, including P4SMA16CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16CAHM3/H requirements.
6.How does Aetrix verify that P4SMA16CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA16CAHM3/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 P4SMA16CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA16CAHM3/H?
All P4SMA16CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16CAHM3/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 P4SMA16CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA16CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA16CAHM3/H Tags
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