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Vishay General Semiconductor - Diodes Division TPSMA22AHE3_B/H
- Part No.:
- TPSMA22AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA22AHE3_B/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA22AHE3_B/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 22 V nominal breakdown voltage (VBR), 30.6 V maximum clamping voltage (VC) at 13.1 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C max junction temperature, and AEC-Q101 qualification - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the TPSMA22AHE3_B/H datasheet, TPSMA22AHE3_B/H pinout, TPSMA22AHE3_B/H application, or TPSMA22AHE3_B/H equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin-plated terminals suitable for high-reliability automotive PCB layouts.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge conditions. Its 185 °C junction rating enables operation in under-hood automotive environments, and its 10/1000 µs waveform response supports IEC 61000-4-5 compliance testing.
The device operates exclusively in unidirectional mode with cathode-band polarity marking, and its thermal derating follows Fig. 2 of document 88405 - maintaining 400 W peak pulse power only up to TA = 25 °C, decreasing linearly above that ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 20.9 V / 22.0 V / 23.1 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 18.8 V - maximum continuous reverse voltage before significant leakage; sets safe margin below VBR |
| VC @ IPPM | 30.6 V - clamped voltage during 13.1 A surge; defines worst-case overvoltage seen by protected IC |
| PPPM | 400 W - peak transient energy absorption capability per 10/1000 µs waveform, critical for lightning/surge immunity |
| TJ max | +185 °C - enables use in high-temperature automotive zones without thermal shutdown or degradation |
| Polarity | Unidirectional - blocks reverse current until VBR exceeded; suited for DC-biased lines like 12 V/24 V supplies |
| MSL Level | Level 1 (J-STD-020) - allows unlimited floor life and reflow up to 260 °C peak, simplifying SMT manufacturing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with molded UL 94 V-0 compound; cathode indicated by color band; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; forms return path during clamping |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to higher-potential side (e.g., VCC rail); conducts surge current to ground when VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces parameter drift over time and temperature, ensuring long-term clamping stability in harsh environments |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in automotive load-dump and inductive switching events |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for downstream ICs |
| Very fast response time | Clamps within <1 ns - faster than typical MOVs or GDTs - preserving signal integrity on high-speed lines |
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 ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤30.6 V, preventing damage to 3.3 V/5 V interface ICs while maintaining signal fidelity during normal operation. | Use Scenario: Shielding digital input modules in programmable logic controllers from inductive kickback generated by solenoid and relay coils. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, absorbing repetitive 400 W surges without degradation. Use Value: Enables >100,000 surge cycles at rated power due to 185 °C TJ rating and low thermal resistance package. |
| Telecom Power Supply Clamp | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding primary-side DC-DC converter inputs in PoE-powered telecom equipment against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-stage TVS on 48 V supply rail, triggered before upstream fuse opens. Use Value: Clamps to 30.6 V within nanoseconds, limiting stress on MOSFETs and controller ICs during 10/1000 µs transients. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Bidirectional-capable circuit not applicable; TPSMA22AHE3_B/H used on low-side switch node with unidirectional polarity aligned to motor supply polarity. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), surviving repeated motor commutation events without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same SMA package, 22 V VBR, but 400 W PPPM with 1.0 W PD; no AEC-Q101 qualification; MSL Level 1 | Not automotive-qualified; suitable for commercial/industrial use where AEC-Q101 is not mandated | Select SMAJ22A for cost-sensitive non-automotive designs requiring identical electrical specs but no automotive reliability validation |
| SMCJ22A | Larger SMC (DO-214AB) package; same 22 V VBR and 400 W PPPM, but higher thermal mass and 5.0 kW peak power capability | Requires larger PCB footprint; better for systems needing higher single-pulse energy handling beyond 400 W | Choose SMCJ22A when board space permits and transient energy exceeds 400 W, e.g., in heavy industrial motor drives |
Compared with SMAJ22A and SMCJ22A, the TPSMA22AHE3_B/H uniquely combines AEC-Q101 qualification, 185 °C junction rating, and SMA footprint - making it the only option among the three validated for under-hood automotive deployment without layout or thermal redesign.
Availability
TPSMA22AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power supply clamping requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPSMA22AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive-grade validation.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor product line, engineered specifically for high-temperature, high-reliability surge protection in automotive and industrial control systems.
FAQ
What is the maximum clamping voltage of the TPSMA22AHE3_B/H under standard test conditions?
The TPSMA22AHE3_B/H has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 13.1 A using the 10/1000 µs waveform. This value is measured per IEC 61000-4-5 guidelines and defines the upper voltage limit imposed on protected circuitry during surge events. The TPSMA22AHE3_B/H maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the TPSMA22AHE3_B/H suitable for automotive applications?
Yes, the TPSMA22AHE3_B/H is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS compliance and automotive-grade reliability validation. It supports operating junction temperatures up to +185 °C and meets MSL Level 1 requirements, making it appropriate for under-hood and body-control module applications. The TPSMA22AHE3_B/H is explicitly listed in Vishay's automotive ordering codes and tested for temperature cycling, HTRB, and surge endurance per AEC-Q101 standards.
What does the "HE3_B/H" suffix mean in TPSMA22AHE3_B/H?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. "B/H" indicates packaging in 7-inch diameter plastic tape and reel, with 1800 units per reel. The "B" refers to the revision code (document revision B), and "H" specifies the preferred package code per Vishay's ordering matrix. This exact suffix confirms full automotive qualification and standardized SMT-ready packaging for the TPSMA22AHE3_B/H.
How does the TPSMA22AHE3_B/H compare to bidirectional TVS diodes?
The TPSMA22AHE3_B/H is unidirectional only, meaning it clamps only in reverse bias and conducts forward current like a standard diode. Unlike bidirectional TVS devices, it cannot suppress symmetrical AC transients without external circuitry. However, its unidirectional architecture delivers lower leakage (<1.0 µA at VWM) and tighter VBR tolerance versus bidirectional equivalents - making the TPSMA22AHE3_B/H ideal for DC-biased rails such as 12 V/24 V automotive supplies and industrial 24 V control lines.
What is the thermal derating behavior of the TPSMA22AHE3_B/H above 25 °C ambient?
The TPSMA22AHE3_B/H follows the derating curve in Figure 2 of Vishay document 88405: peak pulse power (PPPM) decreases linearly from 400 W at TA = 25 °C to zero at TA ≈ 175 °C. At 85 °C ambient, PPPM is reduced to approximately 260 W. This derating is based on junction temperature limits and must be applied in thermal design - the TPSMA22AHE3_B/H's 185 °C TJmax allows continued operation where other TVS diodes would fail.
TPSMA22AHE3_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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
TPSMA22AHE3_B/H FAQ
1.How can I place an order for TPSMA22AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA22AHE3_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 TPSMA22AHE3_B/H reliable?
The price and inventory of TPSMA22AHE3_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 TPSMA22AHE3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA22AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA22AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA22AHE3_B/H?
TPSMA22AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA22AHE3_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 TPSMA22AHE3_B/H?
For technical support, including TPSMA22AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA22AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA22AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA22AHE3_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 TPSMA22AHE3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA22AHE3_B/H?
All TPSMA22AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA22AHE3_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 TPSMA22AHE3_B/H part is unused and in its original packaging.
Return procedure for TPSMA22AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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