My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA39AHM3_A/H
- Part No.:
- P4SMA39AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39AHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,417
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA39AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the P4SMA39AHM3_A/H datasheet, P4SMA39AHM3_A/H pinout, P4SMA39AHM3_A/H application, or P4SMA39AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 33.3 V stand-off voltage (VWM), <1 µA reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients. Its design targets transient suppression on DC power rails and low-voltage signal paths where precise voltage thresholding and minimal capacitance are critical.
The device operates within -65 °C to +150 °C junction temperature range and is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine). Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring minimum 0.2" × 0.2" copper pads per terminal for full 400 W rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise overvoltage triggering threshold for reliable protection without false trips |
| VWM | 33.3 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 53.9 V at 7.4 A - clamping voltage during 400 W transient; determines protected circuit's maximum stress level |
| PPPM | 400 W (10/1000 µs) - peak transient energy handling capacity; derates to 300 W above 91 V |
| IFSM | 40 A (8.3 ms half-sine) - surge current capability for short-duration inrush or fault events |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Leakage @ VWM | <1 µA - ensures negligible standby power loss and signal integrity on sensitive analog/sensor lines |
Pinout & Package
SMA (DO-214AC) surface-mount package with cathode band marking; dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 33 V supply or sensor output) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JESD22 |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern electronics manufacturing and end-of-life disposal |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| 400 W peak pulse power | Handles high-energy transients from inductive loads (e.g., solenoids, relays) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to downstream components during clamping event |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 33 V CAN transceiver power rails and LIN bus signal lines from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive surges exceeding 33.3 V. Use Value: Prevents latch-up or permanent damage to transceivers during ISO 7637-2 Pulse 5a events while maintaining <1 µA quiescent leakage. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, referenced to common ground, absorbing transients up to 400 W. Use Value: Enables robust operation in factory-floor environments with frequent relay switching and cable routing near motor drives. |
| Consumer Appliance Motor Driver | Telecom Power Supply Monitoring |
Use Scenario: Clamping flyback voltage spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: TVS connected across motor terminals or driver FET drain-source to suppress >100 V spikes. Use Value: Extends MOSFET lifetime by limiting VDS stress to ≤53.9 V during commutation, avoiding avalanche failure. |
Use Scenario: Protecting voltage-monitoring IC inputs (e.g., supervisor ICs sensing 33 V backup rails) from coupling noise and surge injection. IC Role / Device Role / Timing Role: Low-capacitance TVS on analog sense line to preserve signal fidelity while blocking transients. Use Value: Maintains accurate voltage monitoring accuracy with <1 µA leakage, preventing false brown-out detection during EMC testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39AHE3_A/H | Same VBR (37.1–41.0 V), same SMA package, but rated for 400 W only up to 33 V; 39 V version has higher VC (56.1 V) and lower IPPM (7.1 A) | Less effective clamping margin (VC/VWM = 1.69 vs. 1.62 for P4SMA39AHM3_A/H); suited for cost-sensitive non-automotive designs | Select when AEC-Q101 qualification is not required and tighter clamping is not critical |
| 1.5SMC39AHM3_A/H | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VBR and VWM, but VC = 56.3 V at 26.7 A | Requires PCB layout change due to larger footprint; used where system-level surge immunity exceeds IEC 61000-4-5 Level 4 | Choose for high-energy industrial surge protection where board space permits larger package |
Compared with SMAJ39AHE3_A/H, P4SMA39AHM3_A/H delivers superior clamping performance and automotive qualification; versus 1.5SMC39AHM3_A/H, it offers identical voltage ratings in a smaller, more space-efficient SMA package-ideal for compact modules where 400 W suffices.
Availability
P4SMA39AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer appliance motor control systems requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA39AHM3_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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the P4SMA39AHM3_A/H under a 400 W transient?
The P4SMA39AHM3_A/H clamps to a maximum of 53.9 V at 7.4 A peak pulse current, corresponding to the 400 W 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and reflects worst-case VC under specified test conditions with recommended PCB pad layout.
Is the P4SMA39AHM3_A/H suitable for automotive applications?
Yes, the P4SMA39AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress test requirements for temperature cycling, mechanical shock, and humidity, making it appropriate for under-hood and body-control module use.
What does the "_A/H" suffix mean in P4SMA39AHM3_A/H?
In P4SMA39AHM3_A/H, "A" denotes the revision level of the AEC-Q101 qualification, and "H" specifies the packaging format: 7-inch diameter plastic tape and reel with 1800 units per reel. The base "HM3" indicates halogen-free, RoHS-compliant, commercial-grade construction with AEC-Q101 qualification.
How does the P4SMA39AHM3_A/H compare to bidirectional TVS diodes like P4SMA39CHM3_A/H?
The P4SMA39AHM3_A/H is unidirectional and designed for DC rail protection where only positive transients occur; P4SMA39CHM3_A/H is bidirectional with symmetric clamping for AC or data-line applications. They share identical VBR, VWM, and PPPM, but the unidirectional version offers lower leakage and is preferred for power-rail use.
What thermal derating applies to the P4SMA39AHM3_A/H above 25 °C ambient?
The P4SMA39AHM3_A/H must be derated linearly above 25 °C ambient per Figure 2 in datasheet 88367: peak pulse power decreases by approximately 0.33% per °C rise, reaching 300 W at ~125 °C ambient. Continuous power dissipation (PD = 3.3 W) also follows standard RθJA = 120 °C/W derating.
P4SMA39AHM3_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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
P4SMA39AHM3_A/H FAQ
1.How can I place an order for P4SMA39AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39AHM3_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 P4SMA39AHM3_A/H reliable?
The price and inventory of P4SMA39AHM3_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 P4SMA39AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA39AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39AHM3_A/H?
P4SMA39AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39AHM3_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 P4SMA39AHM3_A/H?
For technical support, including P4SMA39AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA39AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA39AHM3_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 P4SMA39AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA39AHM3_A/H?
All P4SMA39AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39AHM3_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 P4SMA39AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA39AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39AHM3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
