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Vishay General Semiconductor - Diodes Division TPSMA39AHM3_B/H
- Part No.:
- TPSMA39AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHM3_B/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
TPSMA39AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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). It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive-grade reliability.
For engineers reviewing the TPSMA39AHM3_B/H datasheet, TPSMA39AHM3_B/H pinout, TPSMA39AHM3_B/H application, or TPSMA39AHM3_B/H equivalent, key selection criteria include unidirectional clamping behavior, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, TJ = 185 °C capability, and halogen-free, RoHS-compliant construction with MSL Level 1 rating.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions. Its 10/1000 µs waveform response supports protection against inductive switching transients and lightning-induced surges in DC power rails and signal lines.
The device exhibits a positive temperature coefficient of VBR (+0.091 %/°C), enabling predictable voltage drift over temperature. It is designed for PCB mounting on 5.0 mm × 5.0 mm copper pads and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 V / 39.0 V / 41.0 V at 1 mA - defines precise voltage threshold where avalanche conduction begins |
| VWM | 33.3 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity without failure |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Polarity | Unidirectional - protects only against negative-going transients on anode-cathode orientation |
| Package | SMA (DO-214AC) - industry-standard SMD outline with cathode band marking and 2.54 mm lead pitch |
Pinout & Package
TPSMA39AHM3_B/H is housed in an SMA (DO-214AC) surface-mount package with two terminals: anode and cathode. The cathode is marked by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias or surge conduction path | Connected to protected line (e.g., power rail or signal trace) requiring clamping to ground |
| Cathode | Current exit terminal; tied to reference (typically ground or lower potential) | Provides low-impedance return path for surge current; polarity-sensitive installation required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for global OEM supply chains without compromising surge robustness |
| MSL Level 1 (260 °C peak) | Enables standard reflow assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Ensures minimal VC overshoot during fast-rising transients (<1 ns response time implied by design) |
| Junction passivation | Enhances long-term reliability under thermal cycling and high-humidity operating conditions |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 33.3 V. Use Value: Limits voltage seen by MCU and CAN transceivers to ≤53.9 V during 400 W pulses, preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to absorb ESD and switching noise. Use Value: Maintains signal integrity with <1.0 µA leakage at 33.3 V, avoiding offset errors in precision current sensing. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing 48 V PoE-powered equipment inputs against induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Primary clamping device on DC input before DC-DC converter stage. Use Value: Withstands 40 A IFSM and 185 °C TJ, ensuring survival during sustained overvoltage events in outdoor telecom cabinets. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in portable audio/video devices. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to shunt fast transients before USB controller. Use Value: Clamps 8 kV contact ESD per IEC 61000-4-2 to <54 V within nanoseconds, preserving USB enumeration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Higher VWM = 36 V, VBR = 40–44.4 V, same 400 W rating but SMB (DO-214AA) package - 2.54 mm vs. 5.28 mm body length | Less compact footprint; slightly higher clamping (60.5 V @ 6.6 A); not AEC-Q101 qualified in standard grade | Choose when board space allows larger package and AEC-Q101 is not required |
| TPSMA36AHM3_B/H | Lower VBR = 34.2–37.8 V, VWM = 30.8 V, identical package, construction, and AEC-Q101/halogen-free status | Better suited for 28 V nominal systems (e.g., aerospace avionics) where tighter clamping margin is needed below 39 V | Select when system working voltage is ≤30.8 V and lower clamping onset is critical |
Compared with SMBJ36A and TPSMA36AHM3_B/H, the TPSMA39AHM3_B/H provides optimal coordination with 33.3 V DC rails-offering higher VWM margin than TPSMA36AHM3_B/H while maintaining identical automotive qualification and thermal robustness as both alternatives.
Availability
TPSMA39AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input circuits requiring stable component supply with AEC-Q101 validation and high-temperature resilience.
Supply support for TPSMA39AHM3_B/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, thermal performance, and automotive qualification.
The TPSMAxxA series belongs to Vishay's PAR® (Passivated Anisotropic Rectifier) TVS platform, engineered specifically for high-reliability transient suppression in harsh-environment applications including automotive power distribution and industrial control systems.
FAQ
What is the maximum clamping voltage of the TPSMA39AHM3_B/H under surge conditions?
The TPSMA39AHM3_B/H has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value ensures downstream components like microcontrollers or transceivers remain within safe operating limits during transient events. The clamping performance is guaranteed across the full operating temperature range and is directly verified per ANSI/IEEE C62.35 test methods.
Is the TPSMA39AHM3_B/H suitable for automotive applications?
Yes, the TPSMA39AHM3_B/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its 185 °C maximum junction temperature, MSL Level 1 rating, and JESD201 Class 2 whisker resistance make it suitable for under-hood and chassis-mounted automotive modules. The TPSMA39AHM3_B/H is explicitly designated for automotive use via its HM3 suffix per Vishay's ordering nomenclature.
How does the TPSMA39AHM3_B/H differ from the HE3-suffixed version?
The TPSMA39AHM3_B/H uses halogen-free molding compound and meets additional environmental requirements beyond RoHS compliance, whereas the HE3 variant is RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both share identical electrical specifications, package dimensions, and thermal ratings; the HM3 suffix indicates stricter material composition for automotive OEMs with halogen restrictions.
What is the stand-off voltage (VWM) of the TPSMA39AHM3_B/H, and why does it matter?
The TPSMA39AHM3_B/H has a stand-off voltage (VWM) of 33.3 V - the maximum continuous reverse voltage it can block without exceeding 1.0 µA leakage. This parameter ensures reliable operation on 24 V or 32 V nominal systems where normal operating voltage must stay safely below the clamping threshold. Exceeding VWM risks premature conduction and power loss.
Can the TPSMA39AHM3_B/H be used in bidirectional protection circuits?
No, the TPSMA39AHM3_B/H is unidirectional only, as confirmed in the Vishay datasheet. It conducts surge current only when the cathode is more positive than the anode. For bidirectional protection (e.g., AC lines or differential signals), a dedicated bidirectional TVS such as the SMAJ33A or a back-to-back diode configuration is required - the TPSMA39AHM3_B/H cannot substitute without circuit redesign.
TPSMA39AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- 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 ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA39AHM3_B/H FAQ
1.How can I place an order for TPSMA39AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHM3_B/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 TPSMA39AHM3_B/H reliable?
The price and inventory of TPSMA39AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39AHM3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA39AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHM3_B/H?
TPSMA39AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHM3_B/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 TPSMA39AHM3_B/H?
For technical support, including TPSMA39AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHM3_B/H requirements.
6.How does Aetrix verify that TPSMA39AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHM3_B/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 TPSMA39AHM3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA39AHM3_B/H?
All TPSMA39AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHM3_B/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 TPSMA39AHM3_B/H part is unused and in its original packaging.
Return procedure for TPSMA39AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA39AHM3_B/H Tags
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