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Vishay General Semiconductor - Diodes Division P4SMA43CAHM3/H
- Part No.:
- P4SMA43CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAHM3/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
P4SMA43CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the P4SMA43CAHM3/H datasheet, P4SMA43CAHM3/H pinout, P4SMA43CAHM3/H application, or P4SMA43CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The P4SMA43CAHM3/H delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), allowing reliable operation up to +150 °C junction temperature in compact layouts with minimal copper pad area (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 36.8 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 40.9–45.2 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 59.3 V at 6.7 A - Maximum voltage seen by protected circuit during 10/1000 µs transient; determines downstream component stress. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 µs waveform; enables suppression of high-energy ESD and load-switching spikes. |
| IPPM | 6.7 A - Corresponding peak pulse current at VC; used to size series impedance and verify layout current capacity. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Either terminal accepts surge current; no fixed polarity - enables protection of AC, differential, or floating lines. |
| Cathode | Transient current exit point (bidirectional) | Functionally identical to Anode; terminals are interchangeable - simplifies layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, differential, or ungrounded signal paths without polarity constraints or external diode pairing. |
| 400 W peak pulse power | Handles high-energy transients from inductive switching (e.g., solenoid drivers) and lightning-induced surges in industrial fieldbus nodes. |
| AEC-Q101 qualified & halogen-free | Meets automotive electronics reliability requirements and environmental compliance (RoHS, JESD201 Class 2 whisker resistance). |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without preconditioning - reduces manufacturing complexity and cost. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream ICs (e.g., CAN transceivers, ADC inputs) during transient events. |
Applications
| Automotive Sensor Interface | Industrial Fieldbus Node |
|---|---|
Use Scenario: Protecting LIN/CAN bus physical layer inputs against battery dump and load-dump transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching transceiver IC. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (12 V systems) with <59.3 V clamping, preventing transceiver latch-up or damage. |
Use Scenario: Safeguarding RS-485 transceiver I/O pins in programmable logic controller (PLC) backplane modules exposed to EFT and surge. IC Role / Device Role / Timing Role: Primary transient suppressor on differential data lines, paired with common-mode choke for enhanced immunity. Use Value: Withstands 4 kV EFT (IEC 61000-4-4) and 2 kV surge (IEC 61000-4-5) without degradation, ensuring uninterrupted communication. |
| Consumer Audio Line Input | Medical Patient Monitor Signal Path |
Use Scenario: Shielding analog audio input jacks on smart speakers from ESD events during user plugging/unplugging of cables. IC Role / Device Role / Timing Role: First-line ESD protection element placed before op-amp input stage and EMI filter network. Use Value: Clamps ±15 kV contact discharge (IEC 61000-4-2) to <±59.3 V within <1 ns, preventing op-amp input stage damage or latch-up. |
Use Scenario: Protecting biopotential amplifier inputs (ECG/EEG) from defibrillator-induced surges and hospital-grade ESD. IC Role / Device Role / Timing Role: Low-leakage (<1 µA at 36.8 V) bidirectional clamp isolating sensitive front-end from patient-connected circuits. Use Value: Ensures patient safety via low capacitance (<100 pF) and guaranteed 36.8 V standoff, meeting IEC 60601-1 creepage/clearance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VWM/VBR/VC, but SMB (DO-214AA) package - 2.5 mm wider body, higher thermal mass, 600 W PPPM. | Better suited for higher-power industrial power rails; requires larger PCB footprint and different pad layout. | Select when higher surge endurance is needed and board space allows SMB footprint. |
| 1.5SMC43CA | Same electrical specs, but SMC (DO-214AB) package - 7.1 mm long, 6.2 mm wide, 2.6 mm thick; 1500 W PPPM. | Targeted at primary-level AC/DC input protection or high-reliability telecom power supplies. | Choose for mains-side surge protection where higher energy absorption and creepage distance are required. |
Compared with SMBJ43CA and 1.5SMC43CA, the P4SMA43CAHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it preferred for space-constrained automotive and portable industrial modules where MSL-1 reflow and halogen-free compliance are mandatory.
Availability
P4SMA43CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial fieldbus interface hardening, and medical signal path ESD mitigation requiring stable component supply across multi-year production cycles.
Supply support for P4SMA43CAHM3/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for robust transient suppression in automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact surface-mount packages with AEC-Q101 and RoHS compliance built-in.
FAQ
What does the "CA" suffix indicate in P4SMA43CAHM3/H?
The "CA" suffix in P4SMA43CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with no cathode band marking and identical VBR, VC, and IPPM characteristics for positive and negative surges. This is essential for protecting AC-coupled or differential signal lines without polarity concerns.
Is P4SMA43CAHM3/H qualified for automotive use?
Yes, P4SMA43CAHM3/H is AEC-Q101 qualified - verified for automotive-grade reliability including temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per JESD22 standards. The "HM3" suffix confirms halogen-free, RoHS-compliant construction meeting automotive material requirements.
What is the maximum clamping voltage of P4SMA43CAHM3/H under standard test conditions?
The maximum clamping voltage (VC) of P4SMA43CAHM3/H is 59.3 V, measured at 6.7 A peak pulse current using the 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does P4SMA43CAHM3/H require special PCB layout considerations?
Yes - for optimal performance, P4SMA43CAHM3/H should be mounted on minimum recommended copper pads (0.2" × 0.2" / 5.0 mm × 5.0 mm per terminal) to achieve rated 400 W pulse power. Short, low-inductance traces to protected nodes and ground planes are essential to minimize voltage overshoot during fast transients.
How does the thermal resistance of P4SMA43CAHM3/H affect its derating in real-world applications?
P4SMA43CAHM3/H has RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead). At ambient temperatures above 25 °C, its peak pulse power must be linearly derated per Figure 2 in the datasheet - e.g., at 85 °C ambient, usable PPPM drops to ~240 W, requiring verification against expected surge energy in the target application.
P4SMA43CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA43CAHM3/H FAQ
1.How can I place an order for P4SMA43CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAHM3/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 P4SMA43CAHM3/H reliable?
The price and inventory of P4SMA43CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA43CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAHM3/H?
P4SMA43CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAHM3/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 P4SMA43CAHM3/H?
For technical support, including P4SMA43CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAHM3/H requirements.
6.How does Aetrix verify that P4SMA43CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAHM3/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 P4SMA43CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA43CAHM3/H?
All P4SMA43CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAHM3/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 P4SMA43CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA43CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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