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Vishay General Semiconductor - Diodes Division P4SMA51CAHM3_A/I
- Part No.:
- P4SMA51CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAHM3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA51CAHM3_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 or power lines. It features a 51 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 70.1 V maximum clamping voltage (VC) at rated current, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the P4SMA51CAHM3_A/I datasheet, P4SMA51CAHM3_A/I pinout, P4SMA51CAHM3_A/I application, or P4SMA51CAHM3_A/I equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom DC power rails where bidirectional clamping, low leakage (<1 µA at 43.6 V), and MSL Level 1 reflow compatibility are required.
Technical Context
The P4SMA51CAHM3_A/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
Rated for 150 °C maximum junction temperature and derated above 25 °C ambient, it delivers 400 W peak pulse power on 0.2" × 0.2" copper pads, with thermal resistance RθJA = 120 °C/W. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - Ensures reliable conduction onset within tight tolerance for predictable clamping behavior |
| VWM | 43.6 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V - Clamped voltage during 400 W 10/1000 µs surge, limiting downstream IC stress |
| IPPM | 5.7 A - Peak pulse current capability under standardized surge waveform |
| PPPM | 400 W - Surge energy handling capacity per JEDEC standard, validated at TA = 25 °C |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical terminal in bidirectional operation | No polarity marking; either terminal serves as anode or cathode depending on transient polarity |
| Cathode | Current exit terminal in forward bias; symmetrical terminal in bidirectional operation | Identical physical terminal to Anode; bidirectional symmetry eliminates orientation constraints during placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted on 5 mm × 5 mm copper pads |
| Low leakage & tight VBR tolerance | ≤1 µA at 43.6 V and ±5% VBR ensure minimal standby power loss and consistent protection threshold |
| Halogen-free, RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and environmental compliance for global automotive supply chains |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load dump and ISO 7637-2 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal pairs to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to automotive-grade op-amps and transceivers while maintaining signal integrity below 43.6 V operating range. |
Use Scenario: Shielding 24 V DC digital input modules in programmable logic controllers from inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to limit transient voltage to ≤70.1 V during 400 W surges. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and PCB area while meeting IEC 61000-4-4 Level 3 immunity. |
| Telecom DC Power Rail Protection | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding -48 V or +24 V telecom power distribution boards against lightning-induced surges on backplane traces. IC Role / Device Role / Timing Role: Primary clamping device placed at board edge connectors to shunt surge energy before reaching DC/DC converters. Use Value: Withstands repetitive 400 W pulses with 0.01% duty cycle, enabling long-term reliability in outdoor base station cabinets. |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS suppressing >8 kV HBM ESD events without degrading 480 Mbps signal integrity. Use Value: Complements integrated port protection by lowering clamping voltage to 70.1 V, reducing stress on USB PHY transceivers during contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Same VBR (48.5–53.6 V) and VC (70.1 V), but SMB package (DO-214AA) with higher PPPM (600 W) and larger footprint | Preferred where higher surge margin is needed and PCB space allows larger 2.54 mm pitch | Select SMBJ51CA if system-level surge testing requires >400 W margin or existing layout uses SMB pads |
| 1.5KE51CA | Through-hole TO-204AE (DO-15) package, same electrical specs but lower thermal performance (RθJA ≈ 150 °C/W) and no AEC-Q101 rating | Suitable for cost-sensitive industrial power supplies where automotive qualification is not required | Choose 1.5KE51CA only for non-automotive, non-SMT designs where manual assembly or legacy through-hole infrastructure exists |
Compared with P4SMA51CAHM3_A/I, SMBJ51CA offers higher surge headroom in a larger SMT package, while 1.5KE51CA provides identical clamping in a legacy through-hole form-neither is pin-compatible, but both serve overlapping protection functions with trade-offs in size, qualification, and thermal design.
Availability
P4SMA51CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power distribution systems requiring stable component supply, AEC-Q101 compliance, and surface-mount manufacturability.
Supply support for P4SMA51CAHM3_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 is engineered for high-reliability transient suppression in automotive, industrial, and telecom environments, delivering standardized TVS performance in compact SMA packages with AEC-Q101 and halogen-free variants.
FAQ
What is the clamping voltage of the P4SMA51CAHM3_A/I under a 400 W surge?
The P4SMA51CAHM3_A/I clamps to a maximum of 70.1 V when subjected to its rated 400 W peak pulse power with a 10/1000 µs waveform. This value is measured at the specified peak pulse current of 5.7 A and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping voltage remains stable across temperature due to the device's low temperature coefficient of VBR (0.102 %/°C). P4SMA51CAHM3_A/I maintains this performance in both directions, critical for protecting bidirectional signal paths.
Is the P4SMA51CAHM3_A/I suitable for automotive applications?
Yes, the P4SMA51CAHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant construction and full automotive stress testing. It operates reliably from -65 °C to +150 °C junction temperature and meets MSL Level 1 for lead-free reflow. The device is explicitly intended for use in automotive sensor interfaces, infotainment power rails, and body control modules where transient immunity to ISO 7637-2 and IEC 61000-4-5 is required. P4SMA51CAHM3_A/I's bidirectional symmetry further supports its deployment in CAN/LIN bus protection.
What does the "CA" suffix mean in P4SMA51CAHM3_A/I?
The "CA" suffix in P4SMA51CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities-no anode/cathode distinction is required during placement. This differs from unidirectional "A" variants, which conduct only in reverse bias and require correct orientation. The CA version is used where AC signals, floating references, or dual-polarity transients must be clamped without polarity constraints. P4SMA51CAHM3_A/I leverages this feature for robust protection of differential buses and ungrounded sensor outputs.
How does the HM3 suffix affect the P4SMA51CAHM3_A/I's compliance status?
The "HM3" suffix in P4SMA51CAHM3_A/I specifies halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD201 Class 2 whisker resistance testing. It also indicates qualification to AEC-Q101 for automotive use. This distinguishes it from "E3" (RoHS commercial grade) and "HE3" (AEC-Q101 with standard RoHS) variants. The HM3 designation ensures P4SMA51CAHM3_A/I meets stringent environmental and reliability requirements for Tier 1 automotive suppliers and industrial equipment deployed in regulated markets.
What is the maximum reverse leakage current for the P4SMA51CAHM3_A/I at its stand-off voltage?
The P4SMA51CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 43.6 V, measured at 25 °C ambient. This low leakage minimizes standby power loss in battery-operated systems and avoids false triggering in high-impedance sensing circuits. Leakage remains below 5 µA up to 80 % of VWM, supporting stable operation in precision analog front-ends. P4SMA51CAHM3_A/I's leakage performance is guaranteed across its full operating temperature range (-65 °C to +150 °C).
P4SMA51CAHM3_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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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)
P4SMA51CAHM3_A/I FAQ
1.How can I place an order for P4SMA51CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAHM3_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 P4SMA51CAHM3_A/I reliable?
The price and inventory of P4SMA51CAHM3_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 P4SMA51CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA51CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAHM3_A/I?
P4SMA51CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAHM3_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 P4SMA51CAHM3_A/I?
For technical support, including P4SMA51CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA51CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAHM3_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 P4SMA51CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA51CAHM3_A/I?
All P4SMA51CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAHM3_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 P4SMA51CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA51CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CAHM3_A/I Tags
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