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Vishay General Semiconductor - Diodes Division P4SMA43AHM3_A/H
- Part No.:
- P4SMA43AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43AHM3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,037
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Product details
Overview
P4SMA43AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V stand-off voltage (VWM), and clamps to ≤59.3 V at 6.7 A peak pulse current (10/1000 µs), delivering 400 W peak pulse power capability.
For engineers reviewing the P4SMA43AHM3_A/H datasheet, P4SMA43AHM3_A/H pinout, P4SMA43AHM3_A/H application, or P4SMA43AHM3_A/H equivalent, this device serves as a robust, AEC-Q101-qualified protection solution for automotive sensor interfaces, industrial I/O lines, and DC power rail surge suppression where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are required.
Technical Context
The P4SMA43AHM3_A/H operates as a unidirectional avalanche diode with glass-passivated junction, optimized for transient suppression under repetitive 10/1000 µs surge waveforms. Its thermal resistance (RθJA = 120 °C/W) and maximum junction temperature of 150 °C support reliable operation in compact PCB layouts with minimal copper pad area (0.2" × 0.2").
It meets JESD201 Class 2 whisker resistance and MSL Level 1 (peak reflow 260 °C), enabling compatibility with standard SMT assembly processes. The cathode band marking confirms polarity, and its 3.3 W steady-state power dissipation (PD) supports continuous biasing in low-leakage protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines precise avalanche onset threshold for repeatable clamping behavior |
| VWM | 36.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA, ensuring no false triggering |
| VC @ IPPM | ≤59.3 V at 6.7 A (10/1000 µs) - clamping voltage determines protected circuit's maximum stress during surge |
| PPPM | 400 W - peak pulse power handling capacity under standardized surge waveform, derated above TA = 25 °C |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), critical for inductive load switching protection |
| TJ max | +150 °C - maximum junction temperature enables operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal performance |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on the body. Designed for automated placement and reflow soldering per J-STD-002/JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line ground or low-side reference | Enables unidirectional clamping from cathode to anode during positive transients on cathode side |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., +12 V rail or signal trace) | Provides low-impedance path to ground when transient exceeds VBR, limiting voltage seen by downstream ICs |
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 | Meets environmental compliance requirements for modern automotive and industrial electronics without compromising surge robustness |
| 400 W peak pulse power (10/1000 µs) | Supports high-energy surge events such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3/4 in compact form factor |
| Low incremental surge resistance | Minimizes VC – VBR delta, reducing voltage overshoot during fast transients and improving system-level immunity |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows use in standard lead-free SMT assembly without baking |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground, clamping transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by limiting voltage to ≤59.3 V during 6.7 A surges. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff protection on 24 V DC input channels, operating continuously at 36.8 V while responding to >1 kV transients. Use Value: Enables long-term reliability in factory automation systems by maintaining <1 µA leakage at rated VWM and surviving 400 W pulses. |
| DC Power Rail Suppression | Consumer Device Port Protection |
Use Scenario: Clamping load-dump transients on 12 V/24 V vehicle battery rails feeding infotainment and ADAS subsystems. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted directly at power entry point, shunting energy to ground before reaching DC-DC converters. Use Value: Withstands 40 A surge current (IFSM) and maintains stable VBR across -65 °C to +150 °C ambient range. |
Use Scenario: ESD protection on USB, HDMI, or display interface lines in automotive head units and smart displays. IC Role / Device Role / Timing Role: Secondary protection stage after integrated ESD arrays, absorbing residual high-energy bursts that bypass on-chip clamps. Use Value: Delivers sub-1 ns response and ≤59.3 V clamping to prevent bit errors or interface lockup during 8 kV contact ESD 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 |
|---|---|---|---|
| SMAJ43A-E3/5A | Same VBR (40.9–45.2 V), identical SMA package, but rated for 400 W only up to 91 V; not AEC-Q101 qualified | Lacks automotive qualification and halogen-free certification; suitable for commercial-grade industrial designs only | Select when AEC-Q101 and halogen-free compliance are not required, and cost optimization is prioritized |
| 1.5SMC43A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W); same VBR/VC specs but larger SMC (DO-214AB) footprint | Requires more PCB area and has lower power density; not optimized for space-constrained automotive modules | Choose only if existing layout uses SMC pads or higher steady-state power dissipation (>3.3 W) is needed |
Compared with SMAJ43A-E3/5A and 1.5SMC43A, the P4SMA43AHM3_A/H delivers automotive-grade reliability, halogen-free compliance, and superior thermal performance in the smallest standardized surface-mount TVS package-making it the preferred choice for next-generation automotive electronics and high-density industrial controls.
Availability
P4SMA43AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA43AHM3_A/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The P4SMA series is engineered specifically for robust transient voltage suppression in harsh environments, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance for mission-critical electronics protection.
FAQ
What is the breakdown voltage tolerance for P4SMA43AHM3_A/H?
The P4SMA43AHM3_A/H has a specified breakdown voltage range of 40.9 V to 45.2 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 43 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level surge margin design without over-engineering.
Is P4SMA43AHM3_A/H suitable for bidirectional transient protection?
No, P4SMA43AHM3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the P4SMA43CA variant. Using P4SMA43AHM3_A/H in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What does the "HM3" suffix signify in P4SMA43AHM3_A/H?
The "HM3" suffix in P4SMA43AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7-inch tape-and-reel packaging (1800 units per reel), and "_A/H" specifies revision level "A" and packaging option "H". This suffix confirms compliance with automotive environmental and reliability standards.
How does P4SMA43AHM3_A/H perform under elevated ambient temperatures?
P4SMA43AHM3_A/H exhibits derated peak pulse power above TA = 25 °C per Figure 2 in the datasheet, with linear reduction to ~250 W at 85 °C ambient. Its RθJA = 120 °C/W and TJ(max) = +150 °C allow sustained operation in under-hood environments when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Can P4SMA43AHM3_A/H replace older P4SMA43A variants in existing designs?
Yes, P4SMA43AHM3_A/H is a direct replacement for legacy P4SMA43A parts in terms of electrical specs, pinout, and package dimensions. It adds halogen-free materials and AEC-Q101 qualification while maintaining identical VBR, VC, and thermal characteristics-enabling drop-in upgrades for automotive and industrial designs requiring enhanced compliance.
P4SMA43AHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4SMA43AHM3_A/H FAQ
1.How can I place an order for P4SMA43AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43AHM3_A/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 P4SMA43AHM3_A/H reliable?
The price and inventory of P4SMA43AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA43AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43AHM3_A/H?
P4SMA43AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43AHM3_A/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 P4SMA43AHM3_A/H?
For technical support, including P4SMA43AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA43AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA43AHM3_A/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 P4SMA43AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA43AHM3_A/H?
All P4SMA43AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43AHM3_A/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 P4SMA43AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA43AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43AHM3_A/H Tags
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