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Vishay General Semiconductor - Diodes Division P4SMA36CAHM3/I
- Part No.:
- P4SMA36CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA36CAHM3/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,315
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Product details
Overview
P4SMA36CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 36 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 49.9 V maximum clamping voltage at 8.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the P4SMA36CAHM3/I datasheet, P4SMA36CAHM3/I pinout, P4SMA36CAHM3/I application, or P4SMA36CAHM3/I equivalent, this device serves as a robust, AEC-Q101-qualified transient protector for automotive sensor interfaces, industrial I/O lines, telecom line cards, and DC power rail surge suppression where bidirectional clamping and halogen-free RoHS compliance are required.
Technical Context
The P4SMA36CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) under standardized 10/1000 µs waveform conditions, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 30.8 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation across production lot. |
| VC (Clamping Voltage) | 49.9 V at 8.0 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream IC survival. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a); derates linearly above 25 °C ambient. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Negligible standby current; avoids loading sensitive analog or low-power sensor circuits. |
| TJ max | 150 °C - Enables use in under-hood automotive and industrial environments without thermal derating penalties. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements; supports PPAP documentation for OEM programs. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for both polarities; connects to protected line or ground reference. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-type devices; no functional distinction-device is fully symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 400 W peak pulse power | Withstands automotive load-dump surges and industrial EFT bursts per IEC 61000-4-4/5 without degradation. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly lines. |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive-grade reliability including HTOL, TC, UHAST, and bond wire strength testing. |
| Low incremental surge resistance | Minimizes clamping overshoot during fast-rising transients (e.g., <1 ns rise time), improving protection fidelity. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules against battery dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and chassis ground, absorbing ±100 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in microcontroller input buffers and op-amp front-ends under harsh vehicle electrical environments. |
Use Scenario: Shielding PLC digital input terminals from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with series impedance to limit let-through energy. Use Value: Eliminates need for external varistors or gas discharge tubes, reducing BOM count and board space while meeting IEC 61000-4-5 Level 3. |
| Telecom Line Card Protection | DC Power Rail Surge Suppression |
Use Scenario: Safeguarding Ethernet PHY interface pins (e.g., MDI pairs) on base station backhaul cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after primary GDT or polymer PTC, providing low-clamp final-stage protection. Use Value: Limits clamped voltage to <50 V, preserving PHY IC integrity while maintaining signal integrity up to 100 MHz. |
Use Scenario: Guarding 36 V DC input rails in PoE-powered equipment against accidental AC mains coupling or capacitor discharge events. IC Role / Device Role / Timing Role: Parallel-connected transient shunt across input capacitor, diverting >100 A surges away from upstream regulators and filters. Use Value: Maintains system uptime by preventing catastrophic failure of DC/DC converters during infrequent but high-energy 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 |
|---|---|---|---|
| SMBJ36CA | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 600 W PPPM rating; higher thermal mass. | Better suited for higher-energy surges; requires larger PCB footprint (5.3 mm × 4.1 mm vs. SMA's 4.5 mm × 2.8 mm). | Select when surge energy exceeds 400 W capability or when board layout allows larger package. |
| 1.5KE36CA | Through-hole (DO-201AE); 1500 W PPPM; higher clamping voltage (58.1 V) and slower response due to parasitic inductance. | Used in legacy power supply designs; not suitable for high-speed signal lines or automated SMT assembly. | Choose only for repair or cost-sensitive non-automated production where through-hole mounting is mandated. |
Compared with SMBJ36CA and 1.5KE36CA, the P4SMA36CAHM3/I offers optimal balance of compact size, AEC-Q101 qualification, and 400 W surge handling-making it the preferred choice for new automotive and industrial SMT designs requiring halogen-free compliance and MSL-1 process compatibility.
Availability
P4SMA36CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line card surge suppression, and DC power rail surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA36CAHM3/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, efficiency, and application-specific optimization.
The P4SMA Series targets cost-effective, high-volume transient protection for automotive, industrial, and communications systems-designed for ease of SMT integration, AEC-Q101 compliance, and consistent clamping performance across temperature and life cycle.
FAQ
What is the clamping voltage of P4SMA36CAHM3/I at its rated peak pulse current?
The P4SMA36CAHM3/I has a maximum clamping voltage (VC) of 49.9 V at 8.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and represents the upper bound voltage imposed on the protected circuit during worst-case transient events. The P4SMA36CAHM3/I maintains this clamping performance across its qualified temperature range and lifetime.
Is P4SMA36CAHM3/I suitable for automotive applications?
Yes, P4SMA36CAHM3/I is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed stress tests for high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and mechanical shock-specifically for automotive electronic modules. It is commonly used in engine control units, body control modules, and ADAS sensor interfaces where bidirectional transient immunity is required.
What does the "CA" suffix mean in P4SMA36CAHM3/I?
The "CA" suffix in P4SMA36CAHM3/I denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive- and negative-going voltage spikes. Unlike unidirectional "A" variants, P4SMA36CAHM3/I has no cathode marking and functions identically in either orientation-ideal for protecting AC-coupled or floating differential lines such as CAN, RS-485, or audio paths.
How does the HM3 suffix differ from E3 or M3 in P4SMA36CAHM3/I?
The HM3 suffix indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. In contrast, E3 is RoHS-compliant but commercial-grade only, and M3 adds halogen-free material without automotive qualification. P4SMA36CAHM3/I thus meets stringent automotive environmental and reliability standards-including whisker resistance (JESD 201 Class 2) and moisture sensitivity level 1-unlike E3 or M3 variants.
What is the thermal resistance of P4SMA36CAHM3/I, and how does it affect layout design?
P4SMA36CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under repetitive surge conditions, designers must ensure adequate copper area and avoid excessive trace length-especially critical in high-duty-cycle industrial applications. The P4SMA36CAHM3/I datasheet specifies exact pad dimensions in Figure 5.
P4SMA36CAHM3/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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 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)
P4SMA36CAHM3/I FAQ
1.How can I place an order for P4SMA36CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA36CAHM3/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 P4SMA36CAHM3/I reliable?
The price and inventory of P4SMA36CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA36CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA36CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA36CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA36CAHM3/I?
P4SMA36CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA36CAHM3/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 P4SMA36CAHM3/I?
For technical support, including P4SMA36CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA36CAHM3/I requirements.
6.How does Aetrix verify that P4SMA36CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA36CAHM3/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 P4SMA36CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA36CAHM3/I?
All P4SMA36CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA36CAHM3/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 P4SMA36CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA36CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA36CAHM3/I Tags
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