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Vishay General Semiconductor - Diodes Division TPSMA39HE3_A/H
- Part No.:
- TPSMA39HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39HE3_A/H.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
TPSMA39HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 39.0 V breakdown voltage (VBR), 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and AEC-Q101 qualification - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA39HE3_A/H datasheet, TPSMA39HE3_A/H pinout, TPSMA39HE3_A/H application, or TPSMA39HE3_A/H equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, TJ = 185 °C capability, and RoHS-compliant, MSL Level 1 packaging suitable for high-reliability reflow assembly.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions. Its 10/1000 µs waveform rating supports standardized lightning and inductive-switching transient immunity testing per IEC 61000-4-5 and ANSI/IEEE C62.35.
The device operates with a 0.091 %/°C temperature coefficient of VBR, enabling predictable voltage shift across -65 °C to +185 °C junction range. Its 3.5 V maximum forward voltage at 25 A ensures minimal conduction loss during forward-biased fault events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 V / 39.0 V / 41.0 V - precise breakdown threshold ensures reliable triggering before downstream IC damage |
| VWM | 33.3 V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage level protects 3.3 V–48 V systems during 400 W transient events |
| PPPM | 400 W (10/1000 µs) - meets IEC 61000-4-5 Level 4 surge immunity requirements |
| TJ max. | +185 °C - enables use in under-hood automotive and high-temperature industrial environments |
| IR @ VWM | 1.0 µA - ultra-low leakage preserves battery life and signal integrity in always-on circuits |
| Package | SMA (DO-214AC) - industry-standard SMD footprint with 0.208" x 0.157" outline and MSL Level 1 reflow compatibility |
Pinout & Package
SMA (DO-214AC) surface-mount package with molded epoxy body, matte tin-plated leads, and cathode band marking. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; defines unidirectional clamping direction |
| Cathode | Transient voltage sensing / clamping node | Connected to protected line (e.g., CAN_H, 12 V rail); voltage referenced to anode during surge |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| 185 °C junction rating | Enables operation in engine control units, ADAS modules, and industrial motor drives without derating |
| 400 W peak pulse power | Withstands 10/1000 µs surges up to 7.4 A while maintaining VC ≤ 53.9 V |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT processes without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground to clamp transients below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs during 12 V/24 V system surges with <1 ns response time. |
Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fuse and downstream LDO. Use Value: Limits rail voltage to ≤53.9 V during 400 W transients, preserving 36 V-rated regulators and microcontrollers. |
| Telecom Line Interface | Consumer Device USB Port Protection |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs, working with common-mode chokes and primary gas discharge tubes. Use Value: Provides sub-100 V clamping with <10 pF junction capacitance to avoid signal integrity degradation at 10 Mbps. |
Use Scenario: Adding robust ESD and surge immunity to USB 2.0 data lines and VBUS in smart home hubs and portable chargers. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS and D+/D−, placed adjacent to connector. Use Value: Meets IEC 61000-4-2 ±15 kV contact discharge requirement while adding <0.5 Ω series impedance to signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39A | Same VBR (37.1–41.0 V), but lower PPPM = 400 W (same rating), higher VC = 60.0 V at 6.7 A; no AEC-Q101 qualification | Not approved for automotive use; suitable only for commercial/industrial grade designs with relaxed reliability requirements | Select SMAJ39A only when AEC-Q101 is not required and board space allows same SMA footprint |
| SMCJ39A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, VC = 64.5 V at 23.3 A; AEC-Q101 available in HE3 variant | Used where higher energy absorption is needed (e.g., 48 V battery systems), but requires larger PCB area and thermal relief | Choose SMCJ39AHE3 for 48 V automotive subsystems needing >1 kV surge margin; not drop-in compatible due to package size |
Compared with SMAJ39A and SMCJ39A, the TPSMA39HE3_A/H delivers AEC-Q101 validation in the smallest SMA footprint with the lowest clamping voltage (53.9 V) among 39 V-class unidirectional TVS diodes, making it optimal for space-constrained automotive and industrial edge nodes requiring guaranteed reliability.
Availability
TPSMA39HE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 24 V power supplies, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and high-temperature operational assurance.
Supply support for TPSMA39HE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The TPSMAxxA family was engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 validation with 185 °C junction capability and optimized clamping performance.
FAQ
What is the exact breakdown voltage range for TPSMA39HE3_A/H?
The TPSMA39HE3_A/H has a guaranteed breakdown voltage (VBR) range of 37.1 V (minimum) to 41.0 V (maximum) at 1.0 mA test current, with a nominal value of 39.0 V. This specification is measured per ANSI/IEEE C62.35 and confirmed across production lots per Vishay Document Number 88405, Revision 23-Jan-2024.
Is TPSMA39HE3_A/H qualified for automotive applications?
Yes, TPSMA39HE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It meets stress test requirements including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing, as documented in Vishay's qualification reports supporting the TPSMAxxA family.
What is the maximum clamping voltage of TPSMA39HE3_A/H and at what current is it specified?
The maximum clamping voltage (VC) of TPSMA39HE3_A/H is 53.9 V, measured at a peak pulse current (IPPM) of 7.4 A using the standardized 10/1000 µs double-exponential waveform. This value ensures safe operation for 36 V-rated downstream circuitry during surge events.
Does TPSMA39HE3_A/H have a unidirectional or bidirectional configuration?
TPSMA39HE3_A/H is unidirectional only, as confirmed in the "Features" section of the Vishay datasheet (Document Number 88405). Its polarity is marked by a cathode band, and it conducts only during reverse-biased overvoltage events - it does not provide symmetrical clamping like bidirectional TVS devices.
What package type and moisture sensitivity level does TPSMA39HE3_A/H use?
TPSMA39HE3_A/H uses the SMA (DO-214AC) surface-mount package and is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. The device ships in 7" tape-and-reel format (1800 units per reel) with halogen-free, RoHS-compliant construction.
TPSMA39HE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 7.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA39HE3_A/H FAQ
1.How can I place an order for TPSMA39HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39HE3_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 TPSMA39HE3_A/H reliable?
The price and inventory of TPSMA39HE3_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 TPSMA39HE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA39HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39HE3_A/H?
TPSMA39HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39HE3_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 TPSMA39HE3_A/H?
For technical support, including TPSMA39HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39HE3_A/H requirements.
6.How does Aetrix verify that TPSMA39HE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA39HE3_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 TPSMA39HE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA39HE3_A/H?
All TPSMA39HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39HE3_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 TPSMA39HE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA39HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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