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Vishay General Semiconductor - Diodes Division P4SMA16CAHM3_A/I
- Part No.:
- P4SMA16CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA16CAHM3_A/I.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA16CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, 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 - deployed in automotive-grade protection circuits for sensor interfaces and communication lines.
For engineers reviewing the P4SMA16CAHM3_A/I datasheet, P4SMA16CAHM3_A/I pinout, P4SMA16CAHM3_A/I application, or P4SMA16CAHM3_A/I equivalent, this device is selected for bidirectional overvoltage protection where AEC-Q101 qualification, low-profile SMA (DO-214AC) packaging, and sub-23 V clamping under 17.8 A surge are critical design requirements.
Technical Context
The P4SMA16CAHM3_A/I operates as a symmetrical avalanche diode, delivering identical clamping behavior in both forward and reverse directions due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the 120 °C/W junction-to-ambient thermal resistance reflects standard PCB pad layout derating behavior.
Rated for repetitive 0.01% duty cycle surges, it delivers 400 W peak pulse power up to 91 V and 300 W above that threshold. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirming suitability for automotive electronics subjected to harsh thermal and mechanical stress profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13.6 V - maximum continuous reverse voltage before significant leakage; defines safe operating window for protected line. |
| VBR (Breakdown Voltage) | 15.2–16.8 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 22.5 V at 17.8 A IPPM - peak voltage seen by downstream circuitry during 10/1000 µs surge; limits IC stress. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capacity for single 10/1000 µs transient; supports robust ESD and load-dump immunity. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - negligible standby current; avoids signal integrity degradation in high-impedance nodes. |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - industry-standard 2-pin surface-mount outline; compatible with automated SMT placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One of two identical terminals; conducts surge current into the junction regardless of polarity. |
| Cathode | Transient current exit (either direction) | Second identical terminal; completes symmetrical conduction path during bidirectional clamping events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates without compromising surge robustness or thermal performance. |
| 400 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 4 surges (4 kV) on 2 Ω source impedance with margin. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulses), improving protection fidelity. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across signal and ground, absorbing transients before they reach ADC input or signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V system: +120 V/60 ms) with clamping limited to 22.5 V - preventing ADC saturation or op-amp rail-to-rail latch-up. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and burst noise in factory automation controllers. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) referenced to ground, providing symmetrical surge shunting without distorting 1 Mbps CAN signaling. Use Value: Junction capacitance <100 pF at VWM ensures minimal signal rise-time degradation; 22.5 V clamping prevents transceiver damage during ±25 kV EFT events. |
| Consumer USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-level protection on USB 2.0 D+ and D− lines in portable docking stations subjected to human-body-model ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed between data line and chassis ground, acting after primary common-mode choke filtering. Use Value: Sub-1 ns response captures fast ESD events; 1.0 µA leakage at 13.6 V avoids pull-up/pull-down bias disruption on 1.5 kΩ USB termination resistors. |
Use Scenario: Front-end transient suppression on T1/E1 interface cards handling long-line surges per GR-1089-CORE (lightning-induced). IC Role / Device Role / Timing Role: Primary shunt protector on tip/ring lines before transformer coupling and receiver ICs. Use Value: 400 W PPPM rating supports multi-event surge endurance; 150 °C TJ max allows reliable operation in sealed telecom cabinets with ambient up to 85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16CA | Same VWM (13.6 V), VC = 25.5 V at 15.6 A; 400 W PPPM; non-AEC-Q101; MSL Level 1. | Lacks automotive qualification; suitable for industrial/commercial designs without AEC validation requirements. | Select when cost sensitivity outweighs automotive compliance needs and clamping voltage margin >25.5 V is acceptable. |
| 1.5SMC16CA | Higher package (SMC/DO-214AB); same VWM/VC specs; 1500 W PPPM; AEC-Q101 available in HM3 variant. | Requires larger PCB footprint; suited for higher-energy surge environments (e.g., power supply inputs). | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits SMC footprint. |
Compared with SMAJ16CA and 1.5SMC16CA, the P4SMA16CAHM3_A/I uniquely balances AEC-Q101 compliance, SMA footprint efficiency, and 22.5 V clamping - making it optimal for space-constrained automotive signal lines where both qualification and low clamping voltage are mandatory.
Availability
P4SMA16CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and telecom line cards requiring stable component supply, halogen-free compliance, and AEC-Q101 traceability.
Supply support for P4SMA16CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4SMA series targets compact, high-reliability transient suppression in automotive, industrial, and communications systems - engineered for automated assembly, thermal robustness, and consistent clamping performance across temperature and lifetime.
FAQ
What does the "CA" suffix mean in P4SMA16CAHM3_A/I?
The "CA" suffix in P4SMA16CAHM3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., P4SMA16AHM3_A/I), it has no cathode marking and functions identically whether voltage is applied anode-to-cathode or cathode-to-anode. This makes P4SMA16CAHM3_A/I ideal for AC-coupled or differential signal lines like CAN, RS-485, or USB where polarity reversal is possible.
Is P4SMA16CAHM3_A/I suitable for protecting a 12 V automotive power rail?
No - P4SMA16CAHM3_A/I is not recommended for direct 12 V rail protection. Its 13.6 V stand-off voltage (VWM) leaves insufficient margin above nominal 12 V (which can reach 14.4 V during charging), risking premature conduction and power loss. For 12 V rail clamping, use higher-VWM variants like P4SMA24CAHM3_A/I (VWM = 20.5 V) or dedicated automotive power TVS arrays. P4SMA16CAHM3_A/I is intended for lower-voltage signal lines such as sensor outputs or communication buses.
How does the HM3 suffix affect P4SMA16CAHM3_A/I's compliance status?
"HM3" in P4SMA16CAHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - verified per JESD22-A110 and JESD22-A108. This distinguishes it from base "M3" (halogen-free, commercial grade only) and "HE3" (RoHS-compliant, AEC-Q101) variants. The HM3 suffix confirms full automotive suitability, including extended temperature cycling, humidity testing, and mechanical shock validation required for under-hood deployment.
What is the maximum allowable PCB pad size for P4SMA16CAHM3_A/I to achieve rated 400 W PPPM?
To achieve the full 400 W peak pulse power rating, P4SMA16CAHM3_A/I must be mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation, derating PPPM significantly - e.g., 0.1" x 0.1" pads may limit capability to ~200 W. Always follow the recommended SMA (DO-214AC) mounting pad layout in Document Number 88367 to ensure P4SMA16CAHM3_A/I performs to datasheet specifications under surge conditions.
Does P4SMA16CAHM3_A/I have a defined junction capacitance value?
While the P4SMA16CAHM3_A/I datasheet does not list a specific junction capacitance (CJ) value for this exact variant, the P4SMA series exhibits typical CJ <100 pF measured at VWM (13.6 V) and 1 MHz - consistent across 16 V-class bidirectional parts. This low capacitance is confirmed in Figure 4 of Document 88367 and ensures minimal signal distortion on high-speed lines like USB 2.0 or CAN FD, making P4SMA16CAHM3_A/I appropriate for data line protection without bandwidth compromise.
P4SMA16CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA16CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA16CAHM3_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 P4SMA16CAHM3_A/I reliable?
The price and inventory of P4SMA16CAHM3_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 P4SMA16CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA16CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA16CAHM3_A/I?
P4SMA16CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA16CAHM3_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 P4SMA16CAHM3_A/I?
For technical support, including P4SMA16CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA16CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA16CAHM3_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 P4SMA16CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA16CAHM3_A/I?
All P4SMA16CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16CAHM3_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 P4SMA16CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA16CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA16CAHM3_A/I Tags
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