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Vishay General Semiconductor - Diodes Division P4SMA36CAHM3_A/I
- Part No.:
- P4SMA36CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA36CAHM3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
P4SMA36CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 36 V standoff voltage (VWM), 400 W peak pulse power (10/1000 μs), and clamping voltage of 49.9 V at 8.0 A peak pulse current. It provides robust ESD and surge protection for signal lines in automotive sensor units and industrial I/O interfaces.
For engineers reviewing the P4SMA36CAHM3_A/I datasheet, P4SMA36CAHM3_A/I pinout, P4SMA36CAHM3_A/I application, or P4SMA36CAHM3_A/I equivalent, this device is selected for bidirectional transient suppression where low clamping ratio, AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 reflow capability are required.
Technical Context
The P4SMA36CAHM3_A/I operates as a symmetrical avalanche diode with identical electrical characteristics in both directions, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 30.8 V).
Designed for high-reliability environments, it meets AEC-Q101 stress testing requirements and supports reflow up to 260 °C peak per J-STD-020. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, limiting steady-state power dissipation to 3.3 W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 30.8 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 34.2–37.8 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 49.9 V at 8.0 A (10/1000 μs) - Peak voltage seen by protected circuit under worst-case surge; determines IC survivability. |
| PPPM | 400 W - Surge energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) line surges. |
| ID (Leakage) | <1.0 μA at VWM - Negligible standby current; avoids loading sensitive analog or low-power logic inputs. |
| TJ max | +150 °C - Enables operation in under-hood automotive or high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized SMD footprint compatible with automated placement; 5.28 mm × 4.50 mm body. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connects across protected line and return (e.g., RS-485 A/B or CAN H/L). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for green manufacturing. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices. |
| 400 W peak pulse rating (10/1000 μs) | Supports repetitive surge events at 0.01% duty cycle; adequate for industrial motor drive I/O protection. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins against load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach the transceiver's ESD structure. Use Value: Prevents latch-up or permanent damage to transceivers during 100 V/50 ms load dump events while maintaining signal integrity due to low capacitance (~50 pF). |
Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to ground, suppressing common-mode surges up to ±1 kV per IEC 61000-4-5. Use Value: Maintains bus uptime by limiting line-to-ground voltage to ≤49.9 V during 400 W surges, avoiding communication lockup or receiver saturation. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Shielding USB 2.0 D+/D− lines in set-top boxes from ESD events (±8 kV contact per IEC 61000-4-2). IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed inline with each data line, grounded via short trace. Use Value: Clamps ESD pulses within <1 ns while adding only ~50 pF capacitance - negligible impact on 480 Mbps signal rise time. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge limiter mounted at line entry point, shunting energy to ground before reaching transformer-coupled interface. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, extending service life of line driver amplifiers in outdoor DSLAM cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Same VWM (30.8 V) and VC (49.9 V), but SMB package (DO-214AA); 600 W PPPM rating. | Larger footprint (4.57 mm × 3.94 mm vs. 5.28 mm × 4.50 mm); higher thermal mass allows longer surge duration handling. | Select when board space permits larger package and higher single-pulse energy tolerance is needed. |
| 1.5KE36CA | Through-hole DO-201 package; same VWM/VC specs but 1500 W PPPM; higher leakage (5.0 μA max). | Requires wave soldering or hand assembly; unsuitable for fully SMT production or high-density layouts. | Choose only for legacy through-hole designs or where mechanical robustness outweighs SMT compatibility. |
Compared with SMBJ36CA and 1.5KE36CA, the P4SMA36CAHM3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and verified 400 W surge capability-making it preferred for new automotive and industrial SMT designs requiring regulatory alignment and process compatibility.
Availability
P4SMA36CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom DSL line protection requiring stable component supply, long-term lifecycle support, and certified AEC-Q101 performance.
Supply support for P4SMA36CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The P4SMA Series targets cost-effective, high-volume transient suppression in automotive, industrial, and consumer electronics, delivering standardized TVS performance in compact surface-mount packages with rigorous qualification.
FAQ
What does the "HM3" suffix mean in P4SMA36CAHM3_A/I?
The "HM3" suffix in P4SMA36CAHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It denotes compliance with IPC-1752A material declarations and successful completion of automotive-grade stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD robustness validation per JESD22-A114.
Is P4SMA36CAHM3_A/I unidirectional or bidirectional?
P4SMA36CAHM3_A/I is a bidirectional TVS diode, as confirmed by the "CA" suffix and documentation stating "electrical characteristics apply in both directions." It has no polarity marking and functions identically regardless of voltage polarity-ideal for protecting AC-coupled or differential signal lines like RS-485 or CAN without orientation constraints.
What is the maximum clamping voltage of P4SMA36CAHM3_A/I under surge conditions?
The maximum clamping voltage of P4SMA36CAHM3_A/I is 49.9 V at 8.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events, ensuring downstream ICs remain within safe operating limits.
Does P4SMA36CAHM3_A/I meet automotive qualification standards?
Yes, P4SMA36CAHM3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay document revision 09-Jan-2024. This certification covers stress tests including operating life, temperature cycling, HTRB, and ESD, confirming suitability for automotive applications such as engine control units, body electronics, and ADAS sensor interfaces.
What is the thermal resistance of P4SMA36CAHM3_A/I, and how does it affect PCB layout?
P4SMA36CAHM3_A/I 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 temperatures under sustained power dissipation, designers must provide adequate copper area and avoid excessive trace length or isolation-especially critical in automotive under-hood environments where ambient temperatures exceed 85 °C.
P4SMA36CAHM3_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):
- 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_A/I FAQ
1.How can I place an order for P4SMA36CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA36CAHM3_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 P4SMA36CAHM3_A/I reliable?
The price and inventory of P4SMA36CAHM3_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 P4SMA36CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA36CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA36CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA36CAHM3_A/I?
P4SMA36CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA36CAHM3_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 P4SMA36CAHM3_A/I?
For technical support, including P4SMA36CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA36CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA36CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA36CAHM3_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 P4SMA36CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA36CAHM3_A/I?
All P4SMA36CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA36CAHM3_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 P4SMA36CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA36CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA36CAHM3_A/I Tags
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