Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation 1N4937GH

Name: 1N4937GH
Brand: Taiwan Semiconductor Corporation
SKU: 1N4937GH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1N4937GH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4937GH.pdf

Description:: DIODE GEN PURP 600V 1A DO204AL

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:10,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

1N4937GH from Taiwan Semiconductor is a single-die fast recovery rectifier diode rated for 1 A average forward current, 600 V repetitive peak reverse voltage (V_RRM), and 200 ns reverse recovery time (t_rr), used in high-efficiency DC-DC converters and switching inverters where low conduction loss and rapid turn-off are critical.

For engineers reviewing the 1N4937GH datasheet, 1N4937GH pinout, 1N4937GH application, or 1N4937GH equivalent, key selection criteria include its DO-41 package compatibility, 1.2 V max forward voltage at 1 A, 30 A surge capability, RoHS/halogen-free compliance, and thermal resistance of 65 °C/W.

Technical Context

This discrete rectifier operates as a unidirectional current switch with cathode-band polarity indication, optimized for high-frequency switching power supplies. Its 200 ns t_rr enables efficient operation in 20–100 kHz SMPS topologies, while the 10 pF junction capacitance minimizes high-frequency switching noise coupling.

The device features pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, and JESD 201 Class 1A whisker resistance. Junction temperature range spans –55 °C to +150 °C, supporting industrial ambient conditions without derating below 100 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Maximum non-repetitive reverse voltage the diode blocks without breakdown; defines usable input voltage range in offline AC-DC front-ends.
I_F	1 A continuous - Rated average forward current at 75 °C ambient; determines heatsink-free operation in low-power adapters.
t_rr	200 ns - Measured under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables minimal switching loss in 50–100 kHz flyback and forward converters.
V_F max	1.2 V @ 1 A, 25 °C - Forward voltage drop defining conduction loss; contributes ~1.2 W dissipation at full load in linear-regulated paths.
R_θJA	65 °C/W - Junction-to-ambient thermal resistance in free-air; sets temperature rise to ~65 °C above ambient at 1 W dissipation.
I_FSM	30 A @ 8.3 ms - Non-repetitive surge rating; withstands inrush currents during cold-start in capacitive-input rectifier stages.
C_J	10 pF @ 1 MHz, 4 V - Junction capacitance affecting EMI generation and snubber design; low value reduces ringing in high-dV/dt circuits.

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) in half-wave or full-wave configurations.
Cathode	Forward current exit point	Marked by colored band; ties to output filter capacitor positive rail or DC bus; reverse-biased during off-state.

Key Features

Feature	Design Value
Fast recovery (t_rr ≤ 200 ns)	Reduces switching losses and EMI in high-frequency SMPS, enabling higher efficiency than standard rectifiers (e.g., 1N4007).
Low V_F (≤ 1.2 V @ 1 A)	Lowers conduction loss by ~20% vs. legacy 1N54xx series, improving thermal margin in compact enclosures.
RoHS & halogen-free	Meets IEC 61249-2-21; eliminates brominated flame retardants and supports lead-free reflow assembly.
UL 94V-0 molding compound	Ensures flame resistance in safety-critical power supplies; required for UL/EN 62368-1 certification.
JESD 201 Class 1A whisker resistance	Prevents tin whisker growth under thermal cycling, enhancing long-term reliability in automotive and industrial control systems.

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated 12 V/1 A flyback converter powering IoT sensor nodes. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 200 ns t_rr minimizes reverse recovery charge loss, improving efficiency by ≥1.5% over 1N4007 at 65 kHz switching frequency.	Use Scenario: Output stage in 24 V input, 110 V AC inverter for portable medical equipment. IC Role / Device Role / Timing Role: Fast-switching rectifier in H-bridge synchronous rectification path handling bidirectional energy flow. Use Value: 600 V V_RRM safely withstands reflected voltage spikes up to 520 V during MOSFET turn-off transients.
AC-DC Adapter	Industrial Power Supply
Use Scenario: Input bridge rectifier in universal-input (85–265 V AC) 5 W wall adapter. IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier converting line-frequency AC into pulsating DC prior to bulk capacitor filtering. Use Value: 30 A I_FSM handles 10× cold-start inrush without degradation, extending service life beyond 50,000 cycles.	Use Scenario: Auxiliary bias supply rectifier in 48 V telecom rectifier module operating at –40 °C to +70 °C ambient. IC Role / Device Role / Timing Role: High-reliability rectifier delivering stable gate drive or control logic power under wide temperature excursions. Use Value: –55 °C to +150 °C T_J range ensures uninterrupted operation without derating across full industrial temperature envelope.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated 12 V/1 A flyback converter powering IoT sensor nodes.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 200 ns t_rr minimizes reverse recovery charge loss, improving efficiency by ≥1.5% over 1N4007 at 65 kHz switching frequency.

Use Scenario: Output stage in 24 V input, 110 V AC inverter for portable medical equipment.

IC Role / Device Role / Timing Role: Fast-switching rectifier in H-bridge synchronous rectification path handling bidirectional energy flow.

Use Value: 600 V V_RRM safely withstands reflected voltage spikes up to 520 V during MOSFET turn-off transients.

AC-DC Adapter

Industrial Power Supply

Use Scenario: Input bridge rectifier in universal-input (85–265 V AC) 5 W wall adapter.

IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier converting line-frequency AC into pulsating DC prior to bulk capacitor filtering.

Use Value: 30 A I_FSM handles 10× cold-start inrush without degradation, extending service life beyond 50,000 cycles.

Use Scenario: Auxiliary bias supply rectifier in 48 V telecom rectifier module operating at –40 °C to +70 °C ambient.

IC Role / Device Role / Timing Role: High-reliability rectifier delivering stable gate drive or control logic power under wide temperature excursions.

Use Value: –55 °C to +150 °C T_J range ensures uninterrupted operation without derating across full industrial temperature envelope.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, t_rr = 150 ns, V_F = 1.15 V @ 1 A - faster recovery but identical voltage/current ratings.	Optimized for >100 kHz operation; slightly lower leakage (I_R = 2 µA @ 25 °C vs. 5 µA).	Preferred when minimizing reverse recovery loss dominates over cost; requires same DO-41 footprint.
ON Semi MUR160	V_RRM = 600 V, t_rr = 50 ns, V_F = 1.25 V @ 1 A - ultrafast but higher forward drop and 1.5× price.	Used in resonant LLC converters where sub-100 ns t_rr prevents shoot-through in synchronous rectification.	Select only if system-level testing confirms benefit from <100 ns recovery; otherwise 1N4937GH offers better cost/performance balance.

Compared with STTH1R06 and MUR160, the 1N4937GH delivers balanced performance at lower cost: its 200 ns t_rr suffices for most 50–80 kHz SMPS designs, while its 1.2 V V_F and 65 °C/W R_θJA ensure thermally robust operation without forced air cooling.

Availability

1N4937GH is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and AC-DC adapters requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for 1N4937GH 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power management and industrial markets since 1979.

The 1N493xG-K series belongs to TSC's general-purpose fast recovery rectifier product line, engineered for cost-sensitive, high-volume power conversion applications demanding reliability, regulatory compliance, and consistent parametric performance across temperature.

FAQ

What is the maximum junction temperature rating for the 1N4937GH?

The 1N4937GH has a maximum junction temperature (T_J) of +150 °C and a minimum of –55 °C. This rating allows operation in industrial environments without thermal derating below 100 °C ambient, provided the calculated junction temperature-based on I_F, V_F, and R_θJA-remains within limits. The 1N4937GH's thermal resistance of 65 °C/W means it reaches 150 °C junction temperature at approximately 1.15 W dissipation in free air.

Is the 1N4937GH RoHS and halogen-free compliant?

Yes, the 1N4937GH is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants, and its pure tin-plated leads meet J-STD-002 solderability requirements. This compliance ensures compatibility with lead-free reflow processes and satisfies environmental directives for consumer, industrial, and medical electronics-excluding life-sustaining applications per TSC notice.

What does the 'GH' suffix indicate in 1N4937GH?

The 'GH' suffix in 1N4937GH denotes Taiwan Semiconductor's internal packaging and environmental variant: 'G' specifies green (halogen-free) compound, and 'H' indicates tape-and-reel packaging (5,000 units per reel). This differs from 'G-K' (bulk) or 'G-K A0G' (ammo box) variants. The electrical and thermal specifications remain identical across all 1N4937G-x suffixes.

How does the 1N4937GH compare to the 1N4007 in switching applications?

The 1N4937GH significantly outperforms the 1N4007 in switching applications due to its 200 ns reverse recovery time versus the 1N4007's 30 µs-over 100× faster. This reduces switching loss, EMI, and voltage overshoot in SMPS circuits. While both share DO-41 packaging and 1 A rating, the 1N4937GH's 1.2 V V_F is comparable, but its 600 V V_RRM matches the 1N4007's rating while offering superior dynamic behavior.

Can the 1N4937GH be used in place of the 1N4936G-K?

Yes, the 1N4937GH can replace the 1N4936G-K in designs requiring higher reverse voltage blocking, as it shares identical package (DO-41), pinout, thermal characteristics, and forward parameters-but offers 600 V V_RRM versus 400 V for the 1N4936G-K. No PCB changes are needed; however, verify that system-level transient voltages do not exceed 600 V to fully leverage the 1N4937GH's extended rating.

1N4937GH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 200 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 V

Capacitance @ Vr, F:: 10pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: -55°C ~ 150°C

1N4937GH FAQ

1.How can I place an order for 1N4937GH through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4937GH 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 1N4937GH reliable?

The price and inventory of 1N4937GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4937GH is usually 5 days.

3.What payment methods are accepted for 1N4937GH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4937GH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4937GH?

1N4937GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4937GH 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 1N4937GH?

For technical support, including 1N4937GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4937GH requirements.

6.How does Aetrix verify that 1N4937GH is sourced from the original manufacturer or authorized distributors?

All 1N4937GH 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 1N4937GH meets industry standards.

7.What is the process for return or replacement of 1N4937GH?

All 1N4937GH units undergo pre-shipment inspection (PSI). If there is an issue with 1N4937GH, 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 1N4937GH part is unused and in its original packaging.

Return procedure for 1N4937GH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

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, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…